<?php

namespace app\admin\controller;

use Throwable;
use app\common\controller\Backend;
use app\common\service\ChannelSettlementService;
use support\think\Db;
use support\Response;
use Webman\Http\Request as WebmanRequest;

/**
 * 渠道管理
 */
class Channel extends Backend
{
    /**
     * 预览接口与手动结算共用「手动结算」按钮权限（避免额外菜单节点）
     */
    protected array $noNeedPermission = ['manualSettlePreview', 'channelAdminShareList', 'saveChannelAdminShare', 'batchSettlePending', 'settleStats'];

    /**
     * Channel模型对象
     * @var object|null
     * @phpstan-var \app\common\model\Channel|null
     */
    protected ?object $model = null;

    protected array|string $preExcludeFields = ['id', 'user_count', 'profit_amount', 'create_time', 'update_time', 'admin_id'];

    protected array $withJoinTable = [];

    protected string|array $quickSearchField = ['id', 'code', 'name'];

    protected bool $modelSceneValidate = true;

    private array $currentChannelIds = [];

    protected function initController(WebmanRequest $request): ?Response
    {
        $this->model = new \app\common\model\Channel();
        $this->currentChannelIds = $this->getCurrentChannelIds();
        return null;
    }

    /**
     * 渠道-管理员树（父级=渠道，子级=管理员，仅可选择子级）
     */
    public function adminTree(WebmanRequest $request): Response
    {
        $response = $this->initializeBackend($request);
        if ($response !== null) return $response;

        $query = Db::name('channel')
            ->field(['id', 'name'])
            ->order('id', 'asc');
        if (!$this->auth->isSuperAdmin()) {
            $query = $query->where('id', 'in', $this->currentChannelIds ?: [0]);
        }
        $channels = $query->select()->toArray();

        $groupChildrenCache = [];
        $getGroupChildren = function ($groupId) use (&$getGroupChildren, &$groupChildrenCache) {
            if ($groupId === null || $groupId === '') return [];
            if (array_key_exists($groupId, $groupChildrenCache)) return $groupChildrenCache[$groupId];
            $children = Db::name('admin_group')
                ->where('pid', $groupId)
                ->where('status', 1)
                ->column('id');
            $all = [];
            foreach ($children as $cid) {
                $all[] = $cid;
                foreach ($getGroupChildren($cid) as $cc) {
                    $all[] = $cc;
                }
            }
            $groupChildrenCache[$groupId] = $all;
            return $all;
        };

        $tree = [];
        foreach ($channels as $ch) {
            $channelId = (int) ($ch['id'] ?? 0);
            $rootGroupIds = Db::name('admin_group')
                ->where('channel_id', $channelId)
                ->where('pid', 0)
                ->where('status', 1)
                ->column('id');
            $groupIds = [];
            foreach ($rootGroupIds as $rootId) {
                $groupIds[] = $rootId;
                foreach ($getGroupChildren($rootId) as $gid) {
                    $groupIds[] = $gid;
                }
            }

            $adminIds = [];
            if ($groupIds) {
                $adminIds = Db::name('admin_group_access')
                    ->where('group_id', 'in', array_unique($groupIds))
                    ->column('uid');
            }
            $adminIds = array_values(array_unique($adminIds));

            $admins = [];
            if ($adminIds) {
                $admins = Db::name('admin')
                    ->field(['id', 'username'])
                    ->where('id', 'in', $adminIds)
                    ->order('id', 'asc')
                    ->select()
                    ->toArray();
            }

            $children = [];
            foreach ($admins as $a) {
                $children[] = [
                    'value'      => (string) $a['id'],
                    'label'      => $a['username'],
                    'channel_id' => $ch['id'],
                    'is_leaf'    => true,
                ];
            }

            $tree[] = [
                'value'    => 'channel_' . $ch['id'],
                'label'    => $ch['name'],
                'disabled' => true,
                'children' => $children,
            ];
        }

        return $this->success('', [
            'list' => $tree,
        ]);
    }

    /**
     * 添加（重写：渠道与角色组在「角色组」侧绑定 channel_id，此处不再写入 admin_group_id）
     * @throws Throwable
     */
    protected function _add(): Response
    {
        if ($this->request && $this->request->method() === 'POST') {
            $data = $this->request->post();
            if (!$data) {
                return $this->error(__('Parameter %s can not be empty', ['']));
            }

            $data = $this->applyInputFilter($data);
            $data = $this->excludeFields($data);
            $data = $this->normalizeAgentModeFields($data);
            $bizErr = $this->validateAndNormalizeBusinessFields($data);
            if ($bizErr !== null) {
                return $this->error($bizErr);
            }
            unset($data['invite_code']);

            if (array_key_exists('admin_group_id', $data)) {
                unset($data['admin_group_id']);
            }

            if ($this->dataLimit && $this->dataLimitFieldAutoFill) {
                $data[$this->dataLimitField] = $this->auth->id;
            }

            $result = false;
            $this->model->startTrans();
            try {
                if ($this->modelValidate) {
                    $validate = str_replace("\\model\\", "\\validate\\", get_class($this->model));
                    if (class_exists($validate)) {
                        $validate = new $validate();
                        if ($this->modelSceneValidate) {
                            $validate->scene('add');
                        }
                        $validate->check($data);
                    }
                }
                $result = $this->model->save($data);
                $this->model->commit();
            } catch (Throwable $e) {
                $this->model->rollback();
                return $this->error($e->getMessage());
            }
            if ($result !== false) {
                return $this->success(__('Added successfully'));
            }
            return $this->error(__('No rows were added'));
        }

        return $this->error(__('Parameter error'));
    }

    /**
     * 编辑（重写：不再维护 channel.admin_group_id）
     * @throws Throwable
     */
    protected function _edit(): Response
    {
        $pk = $this->model->getPk();
        $id = $this->request ? ($this->request->post($pk) ?? $this->request->get($pk)) : null;
        $row = $this->model->find($id);
        if (!$row) {
            return $this->error(__('Record not found'));
        }
        if (!$this->auth->isSuperAdmin() && !in_array($row['id'], $this->currentChannelIds, true)) {
            return $this->error(__('You have no permission'));
        }

        $dataLimitAdminIds = $this->getDataLimitAdminIds();
        if ($dataLimitAdminIds && !in_array($row[$this->dataLimitField], $dataLimitAdminIds)) {
            return $this->error(__('You have no permission'));
        }

        if ($this->request && $this->request->method() === 'POST') {
            $data = $this->request->post();
            if (!$data) {
                return $this->error(__('Parameter %s can not be empty', ['']));
            }

            $data = $this->applyInputFilter($data);
            $data = $this->excludeFields($data);
            $data = $this->normalizeAgentModeFields($data);
            $bizErr = $this->validateAndNormalizeBusinessFields($data);
            if ($bizErr !== null) {
                return $this->error($bizErr);
            }
            unset($data['invite_code']);

            if (array_key_exists('admin_group_id', $data)) {
                unset($data['admin_group_id']);
            }

            $result = false;
            $this->model->startTrans();
            try {
                if ($this->modelValidate) {
                    $validate = str_replace("\\model\\", "\\validate\\", get_class($this->model));
                    if (class_exists($validate)) {
                        $validate = new $validate();
                        if ($this->modelSceneValidate) {
                            $validate->scene('edit');
                        }
                        $data[$pk] = $row[$pk];
                        $validate->check($data);
                    }
                }
                $result = $row->save($data);
                $this->model->commit();
            } catch (Throwable $e) {
                $this->model->rollback();
                return $this->error($e->getMessage());
            }
            if ($result !== false) {
                return $this->success(__('Update successful'));
            }
            return $this->error(__('No rows updated'));
        }

        return $this->success('', [
            'row' => $row
        ]);
    }

    /**
     * 查看
     * @throws Throwable
     */
    protected function _index(): Response
    {
        if ($this->request && $this->request->get('select')) {
            return $this->select($this->request);
        }

        list($where, $alias, $limit, $order) = $this->queryBuilder();
        if (!$this->auth->isSuperAdmin()) {
            $where[] = [$alias['channel'] . '.id', 'in', $this->currentChannelIds ?: [0]];
        }
        $res = $this->model
            ->alias($alias)
            ->where($where)
            ->order($order)
            ->paginate($limit);

        return $this->success('', [
            'list'   => $res->items(),
            'total'  => $res->total(),
            'remark' => get_route_remark(),
        ]);
    }

    /**
     * 手动结算预览：区间=上次结算周期结束～当前时间；金额来自已结算注单汇总（服务端计算）
     */
    public function manualSettlePreview(WebmanRequest $request): Response
    {
        $response = $this->initializeBackend($request);
        if ($response !== null) {
            return $response;
        }
        if (!$this->auth->check('channel/manualSettle')) {
            return $this->error(__('You have no permission'));
        }

        $id = (int) ($request->get('id', 0));
        if ($id <= 0) {
            return $this->error(__('Parameter error'));
        }
        $row = $this->model->find($id);
        if (!$row) {
            return $this->error(__('Record not found'));
        }
        if (!$this->auth->isSuperAdmin() && !in_array((int) $row['id'], $this->currentChannelIds, true)) {
            return $this->error(__('You have no permission'));
        }

        $payload = ChannelSettlementService::buildSettlePayload($row->toArray());
        if (is_string($payload)) {
            return $this->error($payload);
        }

        return $this->success('', $payload);
    }

    /**
     * 渠道管理员分配比例列表（用于结算二次分配配置）
     */
    public function channelAdminShareList(WebmanRequest $request): Response
    {
        $response = $this->initializeBackend($request);
        if ($response !== null) {
            return $response;
        }
        if (!$this->auth->check('channel/edit')) {
            return $this->error(__('You have no permission'));
        }
        $id = (int) ($request->get('id', 0));
        if ($id <= 0) {
            return $this->error(__('Parameter error'));
        }
        $row = $this->model->find($id);
        if (!$row) {
            return $this->error(__('Record not found'));
        }
        if (!$this->auth->isSuperAdmin() && !in_array((int) $row['id'], $this->currentChannelIds, true)) {
            return $this->error(__('You have no permission'));
        }

        $adminRows = Db::name('admin')
            ->field(['id', 'username', 'status'])
            ->where('channel_id', (int) $row['id'])
            ->order('id', 'asc')
            ->select()
            ->toArray();
        $shareRows = Db::name('channel_admin_share')
            ->where('channel_id', (int) $row['id'])
            ->column(['share_rate', 'status'], 'admin_id');

        $adminIds = [];
        foreach ($adminRows as $adminRow) {
            $aid = (int) ($adminRow['id'] ?? 0);
            if ($aid > 0) {
                $adminIds[] = $aid;
            }
        }
        $adminIds = array_values(array_unique($adminIds));
        $roleMetaMap = $this->resolveAdminRoleMetaForChannel((int) $row['id'], $adminIds);

        $list = [];
        foreach ($adminRows as $adminRow) {
            $aid = (int) ($adminRow['id'] ?? 0);
            if ($aid <= 0) {
                continue;
            }
            $saved = $shareRows[$aid] ?? null;
            $roleMeta = $roleMetaMap[$aid] ?? null;
            $list[] = [
                'admin_id' => $aid,
                'username' => (string) ($adminRow['username'] ?? ''),
                'role_group_name' => is_array($roleMeta) ? (string) ($roleMeta['role_group_name'] ?? '') : '',
                'role_level' => is_array($roleMeta) ? (int) ($roleMeta['role_level'] ?? 9999) : 9999,
                'admin_status' => (string) ($adminRow['status'] ?? ''),
                'share_rate' => $saved['share_rate'] ?? null,
                'status' => isset($saved['status']) ? (int) $saved['status'] : 1,
            ];
        }
        usort($list, static function (array $a, array $b): int {
            $levelA = (int) ($a['role_level'] ?? 9999);
            $levelB = (int) ($b['role_level'] ?? 9999);
            if ($levelA !== $levelB) {
                return $levelA <=> $levelB;
            }
            $idA = (int) ($a['admin_id'] ?? 0);
            $idB = (int) ($b['admin_id'] ?? 0);
            return $idA <=> $idB;
        });

        return $this->success('', [
            'channel_id' => (int) $row['id'],
            'channel_name' => (string) ($row['name'] ?? ''),
            'list' => $list,
        ]);
    }

    /**
     * @param array<int, int> $adminIds
     * @return array<int, array{role_group_name:string,role_level:int}>
     */
    private function resolveAdminRoleMetaForChannel(int $channelId, array $adminIds): array
    {
        if ($channelId <= 0 || $adminIds === []) {
            return [];
        }
        $groupRows = Db::name('admin_group')
            ->field(['id', 'pid', 'name'])
            ->where('channel_id', $channelId)
            ->order('id', 'asc')
            ->select()
            ->toArray();
        if ($groupRows === []) {
            return [];
        }
        $groupMap = [];
        foreach ($groupRows as $groupRow) {
            $gid = (int) ($groupRow['id'] ?? 0);
            if ($gid <= 0) {
                continue;
            }
            $groupMap[$gid] = [
                'pid' => (int) ($groupRow['pid'] ?? 0),
                'name' => trim((string) ($groupRow['name'] ?? '')),
            ];
        }
        if ($groupMap === []) {
            return [];
        }
        $groupDepthById = [];
        $calcDepth = function (int $groupId) use (&$calcDepth, &$groupDepthById, $groupMap): int {
            if (isset($groupDepthById[$groupId])) {
                return $groupDepthById[$groupId];
            }
            $current = $groupMap[$groupId] ?? null;
            if (!$current) {
                $groupDepthById[$groupId] = 9999;
                return 9999;
            }
            $pid = (int) ($current['pid'] ?? 0);
            if ($pid <= 0 || !isset($groupMap[$pid])) {
                $groupDepthById[$groupId] = 1;
                return 1;
            }
            $depth = $calcDepth($pid) + 1;
            $groupDepthById[$groupId] = $depth;
            return $depth;
        };

        $accessRows = Db::name('admin_group_access')
            ->field(['uid', 'group_id'])
            ->where('uid', 'in', $adminIds)
            ->order('uid', 'asc')
            ->order('group_id', 'asc')
            ->select()
            ->toArray();
        $metaMap = [];
        foreach ($accessRows as $accessRow) {
            $uid = (int) ($accessRow['uid'] ?? 0);
            $groupId = (int) ($accessRow['group_id'] ?? 0);
            if ($uid <= 0 || $groupId <= 0 || !isset($groupMap[$groupId])) {
                continue;
            }
            $roleName = trim((string) ($groupMap[$groupId]['name'] ?? ''));
            if ($roleName === '') {
                continue;
            }
            $depth = $calcDepth($groupId);
            if (!isset($metaMap[$uid])) {
                $metaMap[$uid] = [
                    'role_group_name' => $roleName,
                    'role_level' => $depth,
                    'group_id' => $groupId,
                ];
                continue;
            }
            $currentDepth = (int) ($metaMap[$uid]['role_level'] ?? 9999);
            $currentGroupId = (int) ($metaMap[$uid]['group_id'] ?? 0);
            if ($depth < $currentDepth || ($depth === $currentDepth && $groupId < $currentGroupId)) {
                $metaMap[$uid]['role_group_name'] = $roleName;
                $metaMap[$uid]['role_level'] = $depth;
                $metaMap[$uid]['group_id'] = $groupId;
            }
        }
        $out = [];
        foreach ($metaMap as $uid => $meta) {
            $out[$uid] = [
                'role_group_name' => (string) ($meta['role_group_name'] ?? ''),
                'role_level' => (int) ($meta['role_level'] ?? 9999),
            ];
        }
        return $out;
    }

    /**
     * 保存渠道管理员分配比例（启用项总和必须=100）
     */
    public function saveChannelAdminShare(WebmanRequest $request): Response
    {
        $response = $this->initializeBackend($request);
        if ($response !== null) {
            return $response;
        }
        if (!$this->auth->check('channel/edit')) {
            return $this->error(__('You have no permission'));
        }
        if ($request->method() !== 'POST') {
            return $this->error(__('Parameter error'));
        }
        $id = (int) ($request->post('id', 0));
        if ($id <= 0) {
            return $this->error(__('Parameter error'));
        }
        $row = $this->model->find($id);
        if (!$row) {
            return $this->error(__('Record not found'));
        }
        if (!$this->auth->isSuperAdmin() && !in_array((int) $row['id'], $this->currentChannelIds, true)) {
            return $this->error(__('You have no permission'));
        }
        $rowsRaw = $request->post('list', []);
        if (!is_array($rowsRaw) || $rowsRaw === []) {
            return $this->error('请至少配置一条分配记录');
        }

        $adminIds = Db::name('admin')
            ->where('channel_id', (int) $row['id'])
            ->column('id');
        $adminIdSet = [];
        foreach ($adminIds as $adminId) {
            $adminIdSet[(int) $adminId] = true;
        }
        if ($adminIdSet === []) {
            return $this->error('该渠道下暂无管理员，无法配置分配比例');
        }

        $enabledSum = '0.00';
        $insertRows = [];
        foreach ($rowsRaw as $line) {
            if (!is_array($line)) {
                continue;
            }
            $adminId = (int) ($line['admin_id'] ?? 0);
            if ($adminId <= 0 || !isset($adminIdSet[$adminId])) {
                continue;
            }
            $status = ((int) ($line['status'] ?? 1)) === 1 ? 1 : 0;
            $shareRaw = $line['share_rate'] ?? null;
            $shareRate = self::normalizeAmountScale($shareRaw === null ? '0' : (string) $shareRaw, 2);
            if (bccomp($shareRate, '0', 2) < 0 || bccomp($shareRate, '100', 2) > 0) {
                return $this->error('分配比例必须在0到100之间');
            }
            if ($status === 1) {
                $enabledSum = bcadd($enabledSum, $shareRate, 2);
            }
            $insertRows[] = [
                'channel_id' => (int) $row['id'],
                'admin_id' => $adminId,
                'share_rate' => $shareRate,
                'status' => $status,
                'create_time' => time(),
                'update_time' => time(),
            ];
        }
        if ($insertRows === []) {
            return $this->error('请至少配置一条有效分配记录');
        }
        if (bccomp($enabledSum, '100.00', 2) !== 0) {
            return $this->error('启用的分配比例总和必须等于100');
        }

        Db::startTrans();
        try {
            Db::name('channel_admin_share')->where('channel_id', (int) $row['id'])->delete();
            Db::name('channel_admin_share')->insertAll($insertRows);
            Db::commit();
        } catch (Throwable $e) {
            Db::rollback();
            return $this->error($e->getMessage());
        }

        return $this->success('分配比例保存成功');
    }

    /**
     * 手动结算（渠道维度）：仅接收备注；周期与金额全部由服务端按注单汇总计算，并写入结算周期与佣金记录
     */
    public function manualSettle(WebmanRequest $request): Response
    {
        $response = $this->initializeBackend($request);
        if ($response !== null) {
            return $response;
        }

        $id = (int) ($request->post('id', $request->get('id', 0)));
        if ($id <= 0) {
            return $this->error(__('Parameter error'));
        }
        $row = $this->model->find($id);
        if (!$row) {
            return $this->error(__('Record not found'));
        }
        if (!$this->auth->isSuperAdmin() && !in_array((int) $row['id'], $this->currentChannelIds, true)) {
            return $this->error(__('You have no permission'));
        }

        $remark = trim((string) $request->post('remark', ''));

        if ($this->auth->isSuperAdmin()) {
            $res = ChannelSettlementService::settleBySuperAdmin((int) $row['id'], intval($this->auth->id), $remark, false);
            if (($res['ok'] ?? false) !== true) {
                return $this->error((string) ($res['msg'] ?? '结算失败'));
            }
            return $this->success('超管结算完成，渠道分红余额已入账');
        }
        $res = ChannelSettlementService::settleDividendByChannelAdmin((int) $row['id'], intval($this->auth->id), $remark);
        if (($res['ok'] ?? false) !== true) {
            return $this->error((string) ($res['msg'] ?? '结算失败'));
        }
        return $this->success('渠道分红已结算完成');
    }

    /**
     * 超管批量结算全部待结算渠道（可作为“提前结算”入口）
     */
    public function batchSettlePending(WebmanRequest $request): Response
    {
        $response = $this->initializeBackend($request);
        if ($response !== null) {
            return $response;
        }
        if (!$this->auth->isSuperAdmin()) {
            return $this->error(__('You have no permission'));
        }
        $res = ChannelSettlementService::settleAllDueChannels(intval($this->auth->id));
        return $this->success('批量结算完成', $res);
    }

    /**
     * 渠道结算统计卡片
     */
    public function settleStats(WebmanRequest $request): Response
    {
        $response = $this->initializeBackend($request);
        if ($response !== null) {
            return $response;
        }
        $query = Db::name('channel');
        if (!$this->auth->isSuperAdmin()) {
            $query->where('id', 'in', $this->currentChannelIds ?: [0]);
        }
        $rows = $query->field(['id', 'status', 'carryover_balance'])->select()->toArray();
        $total = count($rows);
        $enabled = 0;
        $disabled = 0;
        $carryoverPositiveCount = 0;
        $carryoverTotal = '0.00';
        $carryoverPositiveTotal = '0.00';
        foreach ($rows as $row) {
            $status = intval($row['status'] ?? 0);
            if ($status === 1) {
                $enabled++;
            } else {
                $disabled++;
            }
            $carry = bcadd(strval($row['carryover_balance'] ?? '0'), '0', 2);
            $carryoverTotal = bcadd($carryoverTotal, $carry, 2);
            if (bccomp($carry, '0', 2) > 0) {
                $carryoverPositiveCount++;
                $carryoverPositiveTotal = bcadd($carryoverPositiveTotal, $carry, 2);
            }
        }
        return $this->success('', [
            'channel_total' => $total,
            'enabled_count' => $enabled,
            'disabled_count' => $disabled,
            'carryover_positive_count' => $carryoverPositiveCount,
            'carryover_total' => $carryoverTotal,
            'carryover_positive_total' => $carryoverPositiveTotal,
        ]);
    }

    /**
     * @return array|string 成功返回预览数据数组，失败返回错误文案
     */
    private function buildManualSettlePayload(array $row): array|string
    {
        $channelId = (int) ($row['id'] ?? 0);
        if ($channelId <= 0) {
            return '渠道数据异常';
        }

        $endTs = time();
        $lastEnd = $this->getLastSettlementEndForChannel($channelId);
        $channelCreateTs = (int) ($row['create_time'] ?? 0);
        if ($lastEnd === null) {
            $periodStartTs = $channelCreateTs > 0 ? $channelCreateTs : 0;
        } else {
            $periodStartTs = (int) $lastEnd;
        }

        if ($periodStartTs >= $endTs) {
            return '结算区间无效（开始时间不早于当前）';
        }

        $stats = $this->aggregateBetOrderForChannel($channelId, $periodStartTs, $lastEnd !== null, $endTs);
        $totalBet = $stats['total_bet'];
        $totalPayout = $stats['total_payout'];
        $profit = bcsub($totalBet, $totalPayout, 2);

        $mode = (string) ($row['agent_mode'] ?? 'turnover');
        $commission = $this->computeCommissionAmounts($row, $totalBet, $profit, $mode);
        if (is_string($commission)) {
            return $commission;
        }

        $settlementNo = $this->generateAgentSettlementNo('M', $channelId, $endTs);

        $splitRows = $this->resolveCommissionSharesForChannel($channelId);
        $splitPreview = $this->buildCommissionSplitPreview($splitRows, $commission['commission_amount']);

        return [
            'settlement_no' => $settlementNo,
            'period_start_ts' => $periodStartTs,
            'period_end_ts' => $endTs,
            'period_start_at' => date('Y-m-d H:i:s', $periodStartTs),
            'period_end_at' => date('Y-m-d H:i:s', $endTs),
            'total_bet_amount' => $totalBet,
            'total_payout_amount' => $totalPayout,
            'platform_profit_amount' => $profit,
            'commission_rate' => $commission['commission_rate'],
            'calc_base_amount' => $commission['calc_base_amount'],
            'commission_amount' => $commission['commission_amount'],
            'agent_mode' => $mode,
            'commission_split' => $splitPreview,
        ];
    }

    /**
     * 生成代理结算周期单号：仅大写字母与数字、无分隔符；首字符 M=手动结算，A=自动结算（定时任务等复用）
     */
    private function generateAgentSettlementNo(string $sourceFlag, int $channelId, int $endTs): string
    {
        $flag = strtoupper(trim($sourceFlag));
        if ($flag !== 'M' && $flag !== 'A') {
            $flag = 'M';
        }
        $channelPart = str_pad((string) max(0, $channelId), 6, '0', STR_PAD_LEFT);
        $timePart = str_pad((string) max(0, $endTs), 10, '0', STR_PAD_LEFT);

        $base = $flag . $channelPart . $timePart;
        for ($i = 0; $i < 8; $i++) {
            $randPart = strtoupper(substr(bin2hex(random_bytes(4)), 0, 2));
            $no = $base . $randPart;
            if (!Db::name('agent_settlement_period')->where('settlement_no', $no)->value('id')) {
                return $no;
            }
        }

        return $base . strtoupper(substr(bin2hex(random_bytes(8)), 0, 16));
    }

    private function getLastSettlementEndForChannel(int $channelId): ?int
    {
        $row = Db::name('agent_commission_record')
            ->alias('acr')
            ->join('agent_settlement_period asp', 'acr.settlement_period_id = asp.id')
            ->where('acr.channel_id', $channelId)
            ->field('MAX(asp.period_end_at) AS m')
            ->find();
        if (!$row) {
            return null;
        }
        $m = $row['m'] ?? null;
        if ($m === null || $m === '') {
            return null;
        }
        return (int) $m;
    }

    /**
     * @return array{total_bet:string,total_payout:string}
     */
    private function aggregateBetOrderForChannel(int $channelId, int $periodStartTs, bool $hasPriorSettlement, int $endTs): array
    {
        $query = Db::name('bet_order')
            ->where('channel_id', $channelId)
            ->where('status', 2)
            ->where('create_time', '<=', $endTs);
        if ($hasPriorSettlement) {
            $query->where('create_time', '>', $periodStartTs);
        } else {
            $query->where('create_time', '>=', $periodStartTs);
        }

        $row = $query->field('SUM(total_amount) AS tb, SUM(win_amount) AS tw, SUM(jackpot_extra_amount) AS tj')->find();
        $tb = $row && $row['tb'] !== null && $row['tb'] !== '' ? (string) $row['tb'] : '0.00';
        $tw = $row && $row['tw'] !== null && $row['tw'] !== '' ? (string) $row['tw'] : '0.00';
        $tj = $row && $row['tj'] !== null && $row['tj'] !== '' ? (string) $row['tj'] : '0.00';
        $totalPayout = bcadd($tw, $tj, 2);

        return [
            'total_bet' => number_format((float) $tb, 4, '.', ''),
            'total_payout' => number_format((float) $totalPayout, 4, '.', ''),
        ];
    }

    /**
     * @return array{commission_rate:string,calc_base_amount:string,commission_amount:string}|string
     */
    private function computeCommissionAmounts(array $row, string $totalBet, string $platformProfit, string $mode): array|string
    {
        if ($mode === 'turnover') {
            $ratePercent = $row['turnover_share_rate'] ?? null;
            if ($ratePercent === null || $ratePercent === '') {
                return '普通返水代理未配置返水分红比例';
            }
            $rateDec = bcdiv((string) $ratePercent, '100', 2);
            $amount = bcmul($totalBet, $rateDec, 2);
            return [
                'commission_rate' => $rateDec,
                'calc_base_amount' => $totalBet,
                'commission_amount' => $amount,
            ];
        }

        if ($mode === 'affiliate') {
            $fee = $row['affiliate_fee_rate'] ?? null;
            $rulesRaw = $row['affiliate_ladder_rules'] ?? null;
            if ($fee === null || $fee === '') {
                return '联营代理未配置成本扣除比例';
            }
            $rules = $this->normalizeLadderRulesForSettlement($rulesRaw);
            if ($rules === []) {
                return '联营阶梯规则无效或为空';
            }

            if (bccomp($platformProfit, '0', 2) <= 0) {
                return [
                    'commission_rate' => '0.00',
                    'calc_base_amount' => '0.00',
                    'commission_amount' => '0.00',
                ];
            }

            $afterFee = bcmul($platformProfit, bcsub('1', (string) $fee, 2), 2);
            if (bccomp($afterFee, '0', 2) <= 0) {
                return [
                    'commission_rate' => '0.00',
                    'calc_base_amount' => '0.00',
                    'commission_amount' => '0.00',
                ];
            }

            $playerLoss = $platformProfit;
            $share = $this->pickAffiliateShareRateFromLadder($rules, $playerLoss);
            $rateDec = number_format($share, 6, '.', '');
            $amount = bcmul($afterFee, $rateDec, 2);

            return [
                'commission_rate' => $rateDec,
                'calc_base_amount' => $afterFee,
                'commission_amount' => $amount,
            ];
        }

        return '未知的代理模式';
    }

    /**
     * @return array<int, array{minLoss: string, shareRate: string}>
     */
    private function normalizeLadderRulesForSettlement(mixed $rulesRaw): array
    {
        if ($rulesRaw === null || $rulesRaw === '') {
            return [];
        }
        if (is_string($rulesRaw)) {
            $decoded = json_decode($rulesRaw, true);
            $rulesRaw = is_array($decoded) ? $decoded : [];
        }
        if (!is_array($rulesRaw)) {
            return [];
        }
        $out = [];
        foreach ($rulesRaw as $rule) {
            if (!is_array($rule)) {
                continue;
            }
            $minLoss = $rule['minLoss'] ?? ($rule['min_loss'] ?? null);
            $shareRate = $rule['shareRate'] ?? ($rule['share_rate'] ?? null);
            if ($minLoss === null || $shareRate === null || !is_numeric((string) $minLoss) || !is_numeric((string) $shareRate)) {
                continue;
            }
            $out[] = [
                'minLoss' => number_format((float) $minLoss, 4, '.', ''),
                'shareRate' => number_format((float) $shareRate, 6, '.', ''),
            ];
        }
        usort($out, function ($a, $b) {
            return bccomp($a['minLoss'], $b['minLoss'], 2);
        });
        return $out;
    }

    /**
     * @param array<int, array{minLoss: string, shareRate: string}> $rules
     */
    private function pickAffiliateShareRateFromLadder(array $rules, string $playerLoss): float
    {
        $chosen = (float) $rules[0]['shareRate'];
        foreach ($rules as $rule) {
            if (bccomp($playerLoss, $rule['minLoss'], 2) >= 0) {
                $chosen = (float) $rule['shareRate'];
            }
        }
        return $chosen;
    }

    private function getCurrentChannelIds(): array
    {
        if ($this->auth->isSuperAdmin()) {
            return Db::name('channel')->column('id');
        }
        $admin = Db::name('admin')
            ->field(['id', 'channel_id'])
            ->where('id', $this->auth->id)
            ->find();
        $ids = [];
        if ($admin && !empty($admin['channel_id'])) {
            $ids[] = $admin['channel_id'];
        }
        return array_values(array_unique($ids));
    }

    /**
     * 佣金归属管理员：取该渠道下 admin.channel_id 匹配的首个管理员（按 id 升序）。
     */
    private function resolveCommissionAdminIdForChannel(int $channelId): ?int
    {
        if ($channelId <= 0) {
            return null;
        }
        $aid = Db::name('admin')
            ->where('channel_id', $channelId)
            ->order('id', 'asc')
            ->value('id');
        if ($aid === null || $aid === '') {
            return null;
        }
        return (int) $aid;
    }

    /**
     * @return array<int, array{admin_id:int, share_rate:string}>
     */
    private function resolveCommissionSharesForChannel(int $channelId): array
    {
        if ($channelId <= 0) {
            return [];
        }
        $rows = Db::name('channel_admin_share')->alias('cas')
            ->join('admin a', 'cas.admin_id = a.id')
            ->field(['cas.admin_id', 'cas.share_rate'])
            ->where('cas.channel_id', $channelId)
            ->where('cas.status', 1)
            ->where('a.status', 'enable')
            ->order('cas.admin_id', 'asc')
            ->select()
            ->toArray();
        if ($rows !== []) {
            $sum = '0.00';
            $out = [];
            foreach ($rows as $row) {
                $adminId = (int) ($row['admin_id'] ?? 0);
                if ($adminId <= 0) {
                    continue;
                }
                $shareRate = self::normalizeAmountScale((string) ($row['share_rate'] ?? '0'), 2);
                if (bccomp($shareRate, '0', 2) <= 0) {
                    continue;
                }
                $sum = bcadd($sum, $shareRate, 2);
                $out[] = [
                    'admin_id' => $adminId,
                    'share_rate' => $shareRate,
                ];
            }
            if ($out !== [] && bccomp($sum, '100.00', 2) === 0) {
                return $out;
            }
        }

        $fallbackAdminId = $this->resolveCommissionAdminIdForChannel($channelId);
        if ($fallbackAdminId === null || $fallbackAdminId <= 0) {
            return [];
        }
        return [[
            'admin_id' => (int) $fallbackAdminId,
            'share_rate' => '100.00',
        ]];
    }

    /**
     * @param array<int, array{admin_id:int, share_rate:string}> $shareRows
     * @return array<int, array{settlement_period_id:int, channel_id:int, admin_id:int, commission_rate:string, calc_base_amount:string, commission_amount:string, status:int, settled_at:null, remark:string, create_time:int, update_time:int}>
     */
    private function buildCommissionRowsForSplit(
        array $shareRows,
        int $channelId,
        int $periodId,
        string $calcBaseAmount,
        string $commissionTotal,
        string $remark,
        int $now
    ): array {
        if ($shareRows === []) {
            return [];
        }
        $sum = '0.00';
        $rows = [];
        $lastIndex = count($shareRows) - 1;
        foreach ($shareRows as $index => $shareRow) {
            $shareRate = self::normalizeAmountScale((string) ($shareRow['share_rate'] ?? '0'), 2);
            $shareDec = bcdiv($shareRate, '100', 2);
            $amount = $index === $lastIndex
                ? bcsub($commissionTotal, $sum, 2)
                : bcmul($commissionTotal, $shareDec, 2);
            if ($index !== $lastIndex) {
                $sum = bcadd($sum, $amount, 2);
            }
            $effectiveRate = bccomp($calcBaseAmount, '0', 2) <= 0 ? '0.00' : bcdiv($amount, $calcBaseAmount, 2);
            $rows[] = [
                'settlement_period_id' => $periodId,
                'channel_id' => $channelId,
                'admin_id' => (int) ($shareRow['admin_id'] ?? 0),
                'commission_rate' => $effectiveRate,
                'calc_base_amount' => $calcBaseAmount,
                'commission_amount' => $amount,
                'status' => 0,
                'settled_at' => null,
                'remark' => $remark . ' | 分配比例=' . $shareRate . '%',
                'create_time' => $now,
                'update_time' => $now,
            ];
        }
        return $rows;
    }

    /**
     * @param array<int, array{admin_id:int, share_rate:string}> $shareRows
     * @return array<int, array{admin_id:int, admin_username:string, share_rate:string, commission_amount:string}>
     */
    private function buildCommissionSplitPreview(array $shareRows, string $commissionTotal): array
    {
        if ($shareRows === []) {
            return [];
        }
        $adminIds = [];
        foreach ($shareRows as $shareRow) {
            $adminIds[] = (int) ($shareRow['admin_id'] ?? 0);
        }
        $adminNames = Db::name('admin')->where('id', 'in', $adminIds)->column('username', 'id');

        $sum = '0.00';
        $out = [];
        $lastIndex = count($shareRows) - 1;
        foreach ($shareRows as $index => $shareRow) {
            $shareRate = self::normalizeAmountScale((string) ($shareRow['share_rate'] ?? '0'), 2);
            $shareDec = bcdiv($shareRate, '100', 2);
            $amount = $index === $lastIndex
                ? bcsub($commissionTotal, $sum, 2)
                : bcmul($commissionTotal, $shareDec, 2);
            if ($index !== $lastIndex) {
                $sum = bcadd($sum, $amount, 2);
            }
            $adminId = (int) ($shareRow['admin_id'] ?? 0);
            $out[] = [
                'admin_id' => $adminId,
                'admin_username' => (string) ($adminNames[$adminId] ?? ('#' . $adminId)),
                'share_rate' => $shareRate,
                'commission_amount' => $amount,
            ];
        }
        return $out;
    }

    private function normalizeAgentModeFields(array $data): array
    {
        $mode = $data['agent_mode'] ?? null;
        if (empty($data['settle_cycle'])) {
            $data['settle_cycle'] = 'weekly';
        }
        if (empty($data['settle_weekday'])) {
            $data['settle_weekday'] = 1;
        }
        if (empty($data['settle_time'])) {
            $data['settle_time'] = '02:00:00';
        }
        if ($mode === 'turnover') {
            $data['affiliate_share_rate'] = null;
            $data['affiliate_fee_rate'] = null;
            $data['carryover_balance'] = 0;
            $data['affiliate_contract_no'] = null;
            $data['affiliate_contract_name'] = null;
            $data['affiliate_ladder_rules'] = null;
            $data['affiliate_effective_start_at'] = null;
            $data['affiliate_effective_end_at'] = null;
            return $data;
        }
        if ($mode === 'affiliate') {
            $data['turnover_share_rate'] = null;
        }
        return $data;
    }

    private function validateAndNormalizeBusinessFields(array &$data): ?string
    {
        $cycle = isset($data['settle_cycle']) ? trim((string) $data['settle_cycle']) : 'weekly';
        if (!in_array($cycle, ['daily', 'weekly', 'monthly'], true)) {
            return '结算周期不合法';
        }
        $data['settle_cycle'] = $cycle;

        $settleTime = isset($data['settle_time']) ? trim((string) $data['settle_time']) : '02:00:00';
        if (!preg_match('/^\d{2}:\d{2}:\d{2}$/', $settleTime)) {
            return '结算时间格式不正确（HH:mm:ss）';
        }
        $data['settle_time'] = $settleTime;

        if ($cycle === 'weekly') {
            $weekday = isset($data['settle_weekday']) ? (int) $data['settle_weekday'] : 1;
            if ($weekday < 1 || $weekday > 7) {
                return '周结必须选择周一到周日';
            }
            $data['settle_weekday'] = $weekday;
        } else {
            $data['settle_weekday'] = 1;
        }

        if ($cycle === 'monthly') {
            $monthday = isset($data['settle_monthday']) ? (int) $data['settle_monthday'] : 1;
            if ($monthday < 1 || $monthday > 31) {
                return '月结日期必须在1到31之间';
            }
            $data['settle_monthday'] = $monthday;
        } else {
            $data['settle_monthday'] = 1;
        }

        $mode = isset($data['agent_mode']) ? (string) $data['agent_mode'] : '';
        if ($mode === 'turnover') {
            if (isset($data['turnover_share_rate']) && $data['turnover_share_rate'] !== '' && $data['turnover_share_rate'] !== null) {
                $num = (float) $data['turnover_share_rate'];
                if ($num < 0 || $num > 100) {
                    return '返水分红比例必须在0到100之间';
                }
            }
            return null;
        }

        if ($mode === 'affiliate') {
            foreach (['affiliate_share_rate' => '联营占成比例', 'affiliate_fee_rate' => '联营成本扣除比例'] as $field => $label) {
                if (!isset($data[$field]) || $data[$field] === '' || $data[$field] === null) {
                    return $label . '不能为空';
                }
                $num = (float) $data[$field];
                if ($num < 0 || $num > 1) {
                    return $label . '必须在0到1之间';
                }
            }
            $ladderErr = $this->validateLadderRulesField($data);
            if ($ladderErr !== null) {
                return $ladderErr;
            }
        }

        return null;
    }

    private static function normalizeAmountScale(string $amount, int $scale): string
    {
        $raw = trim(str_replace(',', '.', $amount));
        if ($raw === '') {
            return '0';
        }
        $negative = false;
        if (str_starts_with($raw, '-')) {
            $negative = true;
            $raw = ltrim(substr($raw, 1));
        }
        if (!str_contains($raw, '.')) {
            $v = ltrim($raw, '0');
            $v = $v === '' ? '0' : $v;
            return $negative ? ('-' . $v) : $v;
        }
        [$intPart, $fracPart] = explode('.', $raw, 2);
        $intPart = ltrim($intPart, '0');
        $intPart = $intPart === '' ? '0' : $intPart;
        $fracPart = preg_replace('/\D+/', '', $fracPart) ?? '';
        if (strlen($fracPart) > $scale) {
            $fracPart = substr($fracPart, 0, $scale);
        } else {
            $fracPart = str_pad($fracPart, $scale, '0');
        }
        $v = $intPart . '.' . $fracPart;
        return $negative ? ('-' . $v) : $v;
    }

    private function validateLadderRulesField(array &$data): ?string
    {
        $rulesRaw = $data['affiliate_ladder_rules'] ?? null;
        if ($rulesRaw === null || $rulesRaw === '') {
            return '联营阶梯规则不能为空';
        }

        if (is_string($rulesRaw)) {
            $decoded = json_decode($rulesRaw, true);
            if (!is_array($decoded)) {
                return '联营阶梯规则必须是有效JSON数组';
            }
            $rulesRaw = $decoded;
        }

        if (!is_array($rulesRaw) || $rulesRaw === []) {
            return '联营阶梯规则至少需要一条';
        }

        $normalized = [];
        $prevMinLoss = null;
        foreach ($rulesRaw as $idx => $rule) {
            if (!is_array($rule)) {
                return '联营阶梯规则第' . ($idx + 1) . '行格式错误';
            }
            $minLoss = $rule['minLoss'] ?? ($rule['min_loss'] ?? null);
            $shareRate = $rule['shareRate'] ?? ($rule['share_rate'] ?? null);
            if ($minLoss === null || $minLoss === '' || !is_numeric((string) $minLoss)) {
                return '联营阶梯规则第' . ($idx + 1) . '行起始客损格式错误';
            }
            if ($shareRate === null || $shareRate === '' || !is_numeric((string) $shareRate)) {
                return '联营阶梯规则第' . ($idx + 1) . '行占成比例格式错误';
            }
            $minLossNum = (float) $minLoss;
            $shareRateNum = (float) $shareRate;
            if ($minLossNum < 0) {
                return '联营阶梯规则第' . ($idx + 1) . '行起始客损不能为负';
            }
            if ($shareRateNum < 0 || $shareRateNum > 1) {
                return '联营阶梯规则第' . ($idx + 1) . '行占成比例必须在0到1之间';
            }
            if ($prevMinLoss !== null && $minLossNum <= $prevMinLoss) {
                return '联营阶梯规则需按起始客损递增';
            }
            $prevMinLoss = $minLossNum;
            $normalized[] = [
                'minLoss' => number_format($minLossNum, 4, '.', ''),
                'shareRate' => number_format($shareRateNum, 6, '.', ''),
            ];
        }

        $data['affiliate_ladder_rules'] = $normalized;
        return null;
    }
}