<?php

namespace App\Services\Player;

use App\Models\Player;
use Illuminate\Support\Facades\DB;
use Illuminate\Validation\ValidationException;

final class PlayerCreditService
{
    /**
     * @param  array{credit_limit?: int}  $payload
     */
    public function upsertAccount(Player $player, array $payload): void
    {
        $limit = max(0, (int) ($payload['credit_limit'] ?? 0));

        DB::table('player_credit_accounts')->updateOrInsert(
            ['player_id' => $player->id],
            [
                'credit_limit' => $limit,
                'used_credit' => DB::raw('COALESCE(used_credit, 0)'),
                'frozen_credit' => DB::raw('COALESCE(frozen_credit, 0)'),
                'updated_at' => now(),
                'created_at' => now(),
            ],
        );
    }

    public function availableCredit(Player $player): int
    {
        $row = DB::table('player_credit_accounts')->where('player_id', $player->id)->first();
        if ($row === null) {
            return 0;
        }

        return max(0, (int) $row->credit_limit - (int) $row->used_credit - (int) $row->frozen_credit);
    }

    public function holdForBet(Player $player, int $amount): void
    {
        if ($amount <= 0) {
            return;
        }

        if (! \App\Support\CreditLineMode::isEnabledForSiteCode((string) $player->site_code)) {
            return;
        }

        $available = $this->availableCredit($player);
        if ($amount > $available) {
            throw ValidationException::withMessages([
                'credit' => ['insufficient'],
            ]);
        }

        DB::table('player_credit_accounts')
            ->where('player_id', $player->id)
            ->update([
                'used_credit' => DB::raw('used_credit + '.$amount),
                'updated_at' => now(),
            ]);

        DB::table('credit_ledger')->insert([
            'owner_type' => 'player',
            'owner_id' => $player->id,
            'amount' => -$amount,
            'reason' => 'bet_hold',
            'ref_type' => 'bet',
            'ref_id' => null,
            'created_at' => now(),
            'updated_at' => now(),
        ]);
    }

    public function releaseFromSettlement(Player $player, int $amount, int $billId): void
    {
        if ($amount <= 0) {
            return;
        }

        DB::table('player_credit_accounts')
            ->where('player_id', $player->id)
            ->update([
                'used_credit' => DB::raw('GREATEST(0, used_credit - '.$amount.')'),
                'updated_at' => now(),
            ]);

        DB::table('credit_ledger')->insert([
            'owner_type' => 'player',
            'owner_id' => $player->id,
            'amount' => $amount,
            'reason' => 'settlement_confirm',
            'ref_type' => 'settlement_bill',
            'ref_id' => $billId,
            'created_at' => now(),
            'updated_at' => now(),
        ]);
    }
}