<?php
namespace App\Controllers\Admin;

use App\Core\AdminBaseController;
use Db\Database;

class FinanceController extends AdminBaseController {
    public function __construct() {
        $this->checkLogin();
        $this->checkAdmin();
    }

    /**
     * 财务管理页面
     */
    public function index() {
        $db = new Database();
        try {
            // 获取资金流水列表
            $transactions = $db->select('transactions', [
                '[>]users' => ['user_id' => 'id']
            ], [
                'transactions.id',
                'transactions.user_id',
                'users.username',
                'transactions.type',
                'transactions.amount',
                'transactions.balance_before',
                'transactions.balance_after',
                'transactions.related_id',
                'transactions.description',
                'transactions.created_at'
            ], [
                'ORDER' => ['transactions.id' => 'DESC'],
                'LIMIT' => 100
            ]);
            
            if (!is_array($transactions)) {
                $transactions = [];
            }
            
            // 计算统计信息
            $stats = $this->calculateStats($db);
            
        } catch (\Throwable $e) {
            $transactions = [];
            $stats = [
                'total_deposit' => 0,
                'total_withdraw' => 0,
                'total_bet' => 0,
                'total_win' => 0,
                'today_deposit' => 0,
                'today_withdraw' => 0
            ];
        }

        $this->render('Admin/finance.php', [
            'transactions' => $transactions,
            'stats' => $stats,
            'title' => '财务管理'
        ]);
    }

    /**
     * 获取资金流水详情
     */
    public function get($id) {
        header('Content-Type: application/json');
        
        if (empty($id) || !is_numeric($id)) {
            echo json_encode([
                'success' => false,
                'message' => '无效的流水ID'
            ]);
            return;
        }

        $db = new Database();
        try {
            $transaction = $db->get('transactions', [
                '[>]users' => ['user_id' => 'id']
            ], [
                'transactions.id',
                'transactions.user_id',
                'users.username',
                'transactions.type',
                'transactions.amount',
                'transactions.balance_before',
                'transactions.balance_after',
                'transactions.related_id',
                'transactions.description',
                'transactions.created_at'
            ], [
                'transactions.id' => $id
            ]);

            if ($transaction) {
                echo json_encode([
                    'success' => true,
                    'data' => $transaction
                ]);
            } else {
                echo json_encode([
                    'success' => false,
                    'message' => '流水记录不存在'
                ]);
            }
        } catch (\Throwable $e) {
            echo json_encode([
                'success' => false,
                'message' => '获取数据失败：' . $e->getMessage()
            ]);
        }
    }

    /**
     * 处理充值
     */
    public function deposit() {
        header('Content-Type: application/json');

        $rawData = file_get_contents('php://input');
        $data = json_decode($rawData, true);
        
        if (json_last_error() !== JSON_ERROR_NONE) {
            echo json_encode([
                'success' => false,
                'message' => '数据格式错误'
            ]);
            return;
        }

        $userId = isset($data['user_id']) ? (int)$data['user_id'] : 0;
        $amount = isset($data['amount']) ? floatval($data['amount']) : 0;
        $description = trim($data['description'] ?? '');

        if ($userId <= 0) {
            echo json_encode([
                'success' => false,
                'message' => '无效的用户ID'
            ]);
            return;
        }

        if ($amount <= 0) {
            echo json_encode([
                'success' => false,
                'message' => '充值金额必须大于0'
            ]);
            return;
        }

        $db = new Database();
        
        try {
            // 获取用户信息
            $user = $db->get('users', ['id', 'balance', 'username'], ['id' => $userId]);
            if (!$user) {
                echo json_encode([
                    'success' => false,
                    'message' => '用户不存在'
                ]);
                return;
            }

            $balanceBefore = floatval($user['balance']);
            $balanceAfter = $balanceBefore + $amount;

            // 更新用户余额
            $db->update('users', [
                'balance' => $balanceAfter,
                'updated_at' => date('Y-m-d H:i:s')
            ], ['id' => $userId]);

            // 记录资金流水
            $transactionId = $db->insert('transactions', [
                'user_id' => $userId,
                'type' => 'deposit',
                'amount' => $amount,
                'balance_before' => $balanceBefore,
                'balance_after' => $balanceAfter,
                'description' => $description ?: '管理员充值',
                'created_at' => date('Y-m-d H:i:s')
            ]);

            echo json_encode([
                'success' => true,
                'message' => '充值成功',
                'data' => [
                    'transaction_id' => $transactionId,
                    'balance_before' => $balanceBefore,
                    'balance_after' => $balanceAfter
                ]
            ]);
        } catch (\Exception $e) {
            echo json_encode([
                'success' => false,
                'message' => '充值失败：' . $e->getMessage()
            ]);
        }
    }

    /**
     * 处理提现
     */
    public function withdraw() {
        header('Content-Type: application/json');

        $rawData = file_get_contents('php://input');
        $data = json_decode($rawData, true);
        
        if (json_last_error() !== JSON_ERROR_NONE) {
            echo json_encode([
                'success' => false,
                'message' => '数据格式错误'
            ]);
            return;
        }

        $userId = isset($data['user_id']) ? (int)$data['user_id'] : 0;
        $amount = isset($data['amount']) ? floatval($data['amount']) : 0;
        $description = trim($data['description'] ?? '');

        if ($userId <= 0) {
            echo json_encode([
                'success' => false,
                'message' => '无效的用户ID'
            ]);
            return;
        }

        if ($amount <= 0) {
            echo json_encode([
                'success' => false,
                'message' => '提现金额必须大于0'
            ]);
            return;
        }

        $db = new Database();
        
        try {
            // 获取用户信息
            $user = $db->get('users', ['id', 'balance', 'username'], ['id' => $userId]);
            if (!$user) {
                echo json_encode([
                    'success' => false,
                    'message' => '用户不存在'
                ]);
                return;
            }

            $balanceBefore = floatval($user['balance']);
            
            // 检查余额是否充足
            if ($balanceBefore < $amount) {
                echo json_encode([
                    'success' => false,
                    'message' => '用户余额不足，当前余额：' . number_format($balanceBefore, 2)
                ]);
                return;
            }

            $balanceAfter = $balanceBefore - $amount;

            // 更新用户余额
            $db->update('users', [
                'balance' => $balanceAfter,
                'updated_at' => date('Y-m-d H:i:s')
            ], ['id' => $userId]);

            // 记录资金流水
            $transactionId = $db->insert('transactions', [
                'user_id' => $userId,
                'type' => 'withdraw',
                'amount' => -$amount, // 提现为负数
                'balance_before' => $balanceBefore,
                'balance_after' => $balanceAfter,
                'description' => $description ?: '管理员提现',
                'created_at' => date('Y-m-d H:i:s')
            ]);

            echo json_encode([
                'success' => true,
                'message' => '提现成功',
                'data' => [
                    'transaction_id' => $transactionId,
                    'balance_before' => $balanceBefore,
                    'balance_after' => $balanceAfter
                ]
            ]);
        } catch (\Exception $e) {
            echo json_encode([
                'success' => false,
                'message' => '提现失败：' . $e->getMessage()
            ]);
        }
    }

    /**
     * 计算财务统计
     */
    private function calculateStats($db) {
        try {
            // 总充值 (包含普通充值和人工加款)
            $totalDeposit = $db->sum('transactions', 'amount', [
                'type' => ['deposit', 'manual_deposit']
            ]) ?: 0;

            // 总提现（取绝对值，包含普通提现和人工扣款）
            $totalWithdraw = abs($db->sum('transactions', 'amount', [
                'type' => ['withdraw', 'manual_withdraw']
            ]) ?: 0);

            // 总投注（取绝对值）
            $totalBet = abs($db->sum('transactions', 'amount', [
                'type' => 'bet'
            ]) ?: 0);

            // 总中奖
            $totalWin = $db->sum('transactions', 'amount', [
                'type' => 'win'
            ]) ?: 0;

            // 今日充值 (包含普通充值和人工加款)
            $todayDeposit = $db->sum('transactions', 'amount', [
                'type' => ['deposit', 'manual_deposit'],
                'created_at[>=]' => date('Y-m-d 00:00:00')
            ]) ?: 0;

            // 今日提现（取绝对值，包含普通提现和人工扣款）
            $todayWithdraw = abs($db->sum('transactions', 'amount', [
                'type' => ['withdraw', 'manual_withdraw'],
                'created_at[>=]' => date('Y-m-d 00:00:00')
            ]) ?: 0);

            return [
                'total_deposit' => floatval($totalDeposit),
                'total_withdraw' => floatval($totalWithdraw),
                'total_bet' => floatval($totalBet),
                'total_win' => floatval($totalWin),
                'today_deposit' => floatval($todayDeposit),
                'today_withdraw' => floatval($todayWithdraw)
            ];
        } catch (\Throwable $e) {
            return [
                'total_deposit' => 0,
                'total_withdraw' => 0,
                'total_bet' => 0,
                'total_win' => 0,
                'today_deposit' => 0,
                'today_withdraw' => 0
            ];
        }
    }
}