<?php

namespace App\Services\Admin;

use App\Models\WalletWithdrawRecord;
use App\Models\WalletTransRecord;
use App\Enums\WithdrawStatus;
use App\Enums\WithdrawAuditStatus;
use App\Enums\TransactionType;
use App\Enums\TransactionStatus;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;

class WalletWithdrawRecordService
{
    /**
     * 审核提现申请
     *
     * @param int $id 提现记录ID
     * @param int $status 审核状态(2:通过 3:拒绝)
     * @param string|null $remark 审核备注
     */
    public function audit(int $id, int $status, ?string $remark = null): void
    {
        DB::transaction(function () use ($id, $status, $remark) {
            // 获取提现记录
            $record = WalletWithdrawRecord::lockForUpdate()->findOrFail($id);

            // 验证记录状态
            abort_if($record->audit_state !== WithdrawAuditStatus::PENDING->value, 400, '提现申请状态异常');

            // 获取用户钱包
            $wallet = $record->wallet;
            abort_if(!$wallet, 404, '钱包信息不存在');

            // 验证冻结金额
            abort_if($wallet->frozen_amount < $record->amount, 400, '钱包冻结金额异常');

            if ($status === WithdrawAuditStatus::APPROVED->value) {
                // 审核通过,发起自动打款
                $this->processApproved($record, $remark);
            } else {
                // 审核拒绝,解冻余额
                $this->processRejected($record, $remark);
            }

            // 记录审核信息
            $record->auditor = auth()->user()->name;
            $record->audit_time = now();
            $record->audit_remark = $remark;
            $record->audit_state = $status;
            $record->save();

            // 记录日志
            Log::info('提现申请审核完成', [
                'withdraw_id' => $record->id,
                'external_no' => $record->external_no,
                'status' => $status,
                'remark' => $remark,
                'auditor' => $record->auditor
            ]);
        });
    }

    /**
     * 处理审核通过
     */
    private function processApproved(WalletWithdrawRecord $record, ?string $remark): void
    {
        try {
            // 1. 更新提现记录状态为处理中
            $record->state = WithdrawStatus::PROCESSING->value;
            $record->save();

            // 获取钱包当前余额
            $wallet = $record->wallet;
            $currentBalance = $wallet->available_amount;
            $currentRechargeBalance = $wallet->recharge_amount;

            // 2. 创建转账记录
            $transRecord = WalletTransRecord::create([
                'trans_no' => $this->generateTransNo(),
                'wallet_id' => $record->wallet_id,
                'owner_id' => $record->id,
                'owner_type' => 'withdraw', // 业务类型：提现
                'trans_type' => 2, // 交易类型：支出
                'amount' => $record->amount,
                'before_balance' => $currentBalance,
                'after_balance' => $currentBalance - $record->amount,
                'before_recharge_balance' => $currentRechargeBalance,
                'after_recharge_balance' => $currentRechargeBalance,
                'trans_time' => now(),
                'remark' => '提现打款',
                'state' => TransactionStatus::PROCESSING->value,
                'province' => $record->area_code ? substr($record->area_code, 0, 2) . '0000' : null,
                'city' => $record->area_code ? substr($record->area_code, 0, 4) . '00' : null,
                'district' => $record->area_code
            ]);

            // 3. 调用支付服务发起转账
            // TODO: 对接实际的支付服务
            $paymentResult = $this->processPayment($record);

            if ($paymentResult['success']) {
                // 4. 打款成功
                // 4.1 更新提现记录状态
                $record->state = WithdrawStatus::SUCCESS->value;
                $record->withdraw_time = now();
                $record->trans_no = $paymentResult['trade_no'];
                $record->remark = '打款成功';
                $record->save();

                // 4.2 更新转账记录状态
                $transRecord->state = TransactionStatus::SUCCESS->value;
                $transRecord->trans_no = $paymentResult['trade_no'];
                $transRecord->save();

                // 4.3 扣除钱包冻结金额
                $record->wallet->decrement('frozen_amount', $record->amount);
            } else {
                // 5. 打款失败
                throw new \Exception($paymentResult['message'] ?? '打款失败');
            }
        } catch (\Exception $e) {
            // 6. 处理异常
            Log::error('提现打款失败', [
                'withdraw_id' => $record->id,
                'error' => $e->getMessage()
            ]);

            // 6.1 更新提现记录状态
            $record->state = WithdrawStatus::FAILED->value;
            $record->remark = $e->getMessage();
            $record->save();

            // 6.2 更新转账记录状态
            if (isset($transRecord)) {
                $transRecord->state = TransactionStatus::FAILED->value;
                $transRecord->save();
            }

            // 6.3 解冻余额
            $this->unfreezeBalance($record);

            throw $e;
        }
    }

    /**
     * 处理审核拒绝
     */
    private function processRejected(WalletWithdrawRecord $record, ?string $remark): void
    {
        // 1. 更新提现记录状态
        $record->state = WithdrawStatus::FAILED->value;
        $record->save();

        // 2. 解冻余额
        $this->unfreezeBalance($record);

        // 3. 记录日志
        Log::info('提现申请已拒绝', [
            'withdraw_id' => $record->id,
            'external_no' => $record->external_no,
            'amount' => $record->amount,
            'remark' => $remark
        ]);
    }

    /**
     * 解冻余额
     */
    private function unfreezeBalance(WalletWithdrawRecord $record): void
    {
        $wallet = $record->wallet;

        // 获取当前余额
        $currentBalance = $wallet->available_amount;
        $currentRechargeBalance = $wallet->recharge_amount;

        // 从冻结金额中减少
        $wallet->decrement('frozen_amount', $record->amount);

        // 增加可用余额
        $wallet->increment('available_amount', $record->amount);

        // 记录解冻操作
        WalletTransRecord::create([
            'trans_no' => $this->generateTransNo(),
            'wallet_id' => $wallet->id,
            'owner_id' => $record->id,
            'owner_type' => 'withdraw',
            'trans_type' => 1, // 交易类型：收入
            'amount' => $record->amount,
            'before_balance' => $currentBalance,
            'after_balance' => $currentBalance + $record->amount,
            'before_recharge_balance' => $currentRechargeBalance,
            'after_recharge_balance' => $currentRechargeBalance,
            'trans_time' => now(),
            'remark' => '提现拒绝解冻',
            'state' => TransactionStatus::SUCCESS->value
        ]);
    }

    /**
     * 生成交易流水号
     */
    private function generateTransNo(): string
    {
        return 'T' . date('YmdHis') . str_pad(random_int(1, 9999), 4, '0', STR_PAD_LEFT);
    }

    /**
     * 处理实际打款
     * TODO: 对接实际支付服务
     */
    private function processPayment(WalletWithdrawRecord $record): array
    {
        // 模拟打款成功
        return [
            'success' => true,
            'trade_no' => 'PAY' . time() . random_int(1000, 9999),
            'message' => '打款成功'
        ];
    }
}