<?php

declare(strict_types=1);

namespace app\common\service;

use support\think\Db;
use Throwable;

/**
 * 全局期号：创建与 game_config 开关（自动新建下一期）
 */
final class GamePeriodService
{
    public const KEY_AUTO_CREATE = 'period_auto_create_enabled';

    public const KEY_MANUAL_CREATE = 'period_manual_create_enabled';

    /** 进行中状态：未结束则不可再开新期 */
    private const ACTIVE_STATUSES = [0, 1, 2, 3];

    public static function getConfigBool(string $key): bool
    {
        $row = Db::name('game_config')->where('config_key', $key)->find();
        if (!$row) {
            return false;
        }
        $v = $row['config_value'] ?? '';
        return $v === '1' || $v === 1;
    }

    /**
     * @return array{period_auto_create_enabled: int, period_manual_create_enabled: int}
     */
    public static function getPeriodSettings(): array
    {
        return [
            'period_auto_create_enabled'  => self::getConfigBool(self::KEY_AUTO_CREATE) ? 1 : 0,
            'period_manual_create_enabled' => self::getConfigBool(self::KEY_MANUAL_CREATE) ? 1 : 0,
        ];
    }

    /**
     * @param array{period_auto_create_enabled?: int|string, period_manual_create_enabled?: int|string} $data
     */
    public static function savePeriodSettings(array $data): void
    {
        $now = time();
        $auto = self::truthyConfigInput($data['period_auto_create_enabled'] ?? null) ? '1' : '0';
        $manual = self::truthyConfigInput($data['period_manual_create_enabled'] ?? null) ? '1' : '0';
        self::upsertConfig(self::KEY_AUTO_CREATE, $auto, 'int', '是否允许定时任务自动创建下一期（全局仅一局）', $now);
        self::upsertConfig(self::KEY_MANUAL_CREATE, $manual, 'int', '是否允许后台手动创建下一期', $now);
    }

    public static function hasActivePeriod(): bool
    {
        $count = Db::name('game_period')->whereIn('status', self::ACTIVE_STATUSES)->count();
        return $count > 0;
    }

    /**
     * 自动开奖任务调用：开启自动创建且无进行中期号时插入新期
     */
    public static function tickAutoCreate(): void
    {
        if (!self::getConfigBool(self::KEY_AUTO_CREATE)) {
            return;
        }
        if (self::hasActivePeriod()) {
            return;
        }
        try {
            self::createNextPeriodRow();
        } catch (Throwable) {
            // 并发下可能重复，忽略
        }
    }

    /**
     * @return array{ok: bool, msg: string, period_no?: string}
     */
    public static function createNextPeriodForManual(): array
    {
        if (!self::getConfigBool(self::KEY_MANUAL_CREATE)) {
            return ['ok' => false, 'msg' => '未开启「手动创建下一期」开关'];
        }
        if (self::hasActivePeriod()) {
            return ['ok' => false, 'msg' => '存在未结束期号，无法新建'];
        }
        try {
            $periodNo = self::createNextPeriodRow();
            return ['ok' => true, 'msg' => '已创建新期', 'period_no' => $periodNo];
        } catch (Throwable $e) {
            return ['ok' => false, 'msg' => $e->getMessage()];
        }
    }

    /**
     * @throws Throwable
     */
    private static function createNextPeriodRow(): string
    {
        $periodNo = self::generatePeriodNo();
        $now = time();
        Db::name('game_period')->insert([
            'period_no'       => $periodNo,
            'period_start_at' => $now,
            'status'          => 0,
            'draw_mode'       => 0,
            'void_reason'     => '',
            'create_time'     => $now,
            'update_time'     => $now,
        ]);
        return $periodNo;
    }

    private static function generatePeriodNo(): string
    {
        return date('Ymd-His') . '-' . substr(bin2hex(random_bytes(4)), 0, 8);
    }

    private static function truthyConfigInput(mixed $v): bool
    {
        return $v === 1 || $v === '1' || $v === true;
    }

    private static function upsertConfig(string $key, string $value, string $valueType, string $remark, int $now): void
    {
        $exists = Db::name('game_config')->where('config_key', $key)->find();
        if ($exists) {
            Db::name('game_config')->where('config_key', $key)->update([
                'config_value' => $value,
                'value_type'   => $valueType,
                'remark'       => $remark,
                'update_time'  => $now,
            ]);
            return;
        }
        Db::name('game_config')->insert([
            'config_key'   => $key,
            'config_value' => $value,
            'value_type'   => $valueType,
            'remark'       => $remark,
            'create_time'  => $now,
            'update_time'  => $now,
        ]);
    }
}