<?php
namespace App\Controllers\Admin;

use App\Core\AdminBaseController;
use Db\Database;

class XocdiaPeriodController extends AdminBaseController {
    private $gameType = 'xocdia';

    public function __construct() {
        $this->checkLogin();
        $this->checkAdmin();
    }

    /**
     * Xóc Đĩa 游戏期号列表页面
     */
    public function index() {
        $db = new Database();
        try {
            // 获取 Xóc Đĩa 游戏列表
            $gamesList = $db->select('games', ['id', 'name'], [
                'type' => $this->gameType,
                'status' => 1,
                'ORDER' => ['id' => 'ASC']
            ]);

            if (!is_array($gamesList)) {
                $gamesList = [];
            }

            // 获取所有 Xóc Đĩa 游戏的game_id
            $gameIds = array_column($gamesList, 'id');

            // 获取 Xóc Đĩa 游戏的期号列表
            $periods = [];
            if (!empty($gameIds)) {
                $periods = $db->select('periods', '*', [
                    'game_id' => $gameIds,
                    'ORDER' => ['id' => 'DESC'],
                    'LIMIT' => 100
                ]);
            }

            if (!is_array($periods)) {
                $periods = [];
            }

            // 构建游戏名称映射
            $games = [];
            foreach ($gamesList as $game) {
                $games[$game['id']] = $game['name'];
            }

            // 为每个 Xóc Đĩa 游戏获取当前期号
            $currentPeriods = [];
            foreach ($gamesList as $game) {
                $currentPeriod = $db->get('periods', '*', [
                    'game_id' => $game['id'],
                    'ORDER' => ['id' => 'DESC']
                ]);
                if ($currentPeriod) {
                    $currentPeriods[$game['id']] = $currentPeriod;
                }
            }

        } catch (\Throwable $e) {
            $periods = [];
            $games = [];
            $gamesList = [];
            $currentPeriods = [];
        }

        $this->render('Admin/xocdia_periods.php', [
            'currentPeriods' => $currentPeriods,
            'periods' => $periods,
            'games' => $games,
            'gamesList' => $gamesList,
            'title' => 'Xóc Đĩa 游戏期号管理'
        ]);
    }

    /**
     * 获取单个期号数据
     */
    public function get($id) {
        header('Content-Type: application/json');

        if (empty($id) || !is_numeric($id)) {
            echo json_encode([
                'success' => false,
                'message' => '无效的期号ID'
            ]);
            return;
        }

        $db = new Database();
        try {
            $period = $db->get('periods', '*', [
                'id' => $id
            ]);

            if ($period) {
                // 验证是否为 Xóc Đĩa 游戏期号
                $game = $db->get('games', ['type'], ['id' => $period['game_id']]);
                if ($game && $game['type'] === $this->gameType) {
                    echo json_encode([
                        'success' => true,
                        'data' => $period
                    ]);
                } else {
                    echo json_encode([
                        'success' => false,
                        'message' => '期号不属于 Xóc Đĩa 游戏'
                    ]);
                }
            } else {
                echo json_encode([
                    'success' => false,
                    'message' => '期号不存在'
                ]);
            }
        } catch (\Throwable $e) {
            echo json_encode([
                'success' => false,
                'message' => '获取数据失败：' . $e->getMessage()
            ]);
        }
    }

    /**
     * 录入开奖结果
     */
    public function draw() {
        header('Content-Type: application/json');

        $data = $_POST;
        if (empty($data)) {
            $input = file_get_contents('php://input');
            $data = json_decode($input, true);
        }

        if (empty($data)) {
            echo json_encode([
                'success' => false,
                'message' => '未接收到数据'
            ]);
            return;
        }

        $db = new Database();
        $id = isset($data['id']) ? (int)$data['id'] : 0;

        if ($id <= 0) {
            echo json_encode([
                'success' => false,
                'message' => '无效的期号ID'
            ]);
            return;
        }

        // 获取期号信息
        $period = $db->get('periods', '*', ['id' => $id]);
        if (!$period) {
            echo json_encode([
                'success' => false,
                'message' => '期号不存在'
            ]);
            return;
        }

        // 验证是否为 Xóc Đĩa 游戏
        $game = $db->get('games', ['type'], ['id' => $period['game_id']]);
        if (!$game || $game['type'] !== $this->gameType) {
            echo json_encode([
                'success' => false,
                'message' => '期号不属于 Xóc Đĩa 游戏'
            ]);
            return;
        }

        // 检查期号状态
        if ($period['status'] === 'settled') {
            echo json_encode([
                'success' => false,
                'message' => '该期号已结算，无法修改'
            ]);
            return;
        }

        $auto = isset($data['auto']) ? (bool)$data['auto'] : false;

        // Xóc Đĩa 开奖逻辑
        if ($auto) {
            // 自动生成：4个硬币随机红/白
            $coins = [];
            for ($i = 0; $i < 4; $i++) {
                $coins[] = (rand(0, 1) === 0) ? 'red' : 'white';
            }
        } else {
            // 手动输入：从前端获取
            $coins = isset($data['coins']) ? $data['coins'] : [];
            if (!is_array($coins) || count($coins) !== 4) {
                echo json_encode([
                    'success' => false,
                    'message' => 'Xóc Đĩa 必须提供4个硬币的颜色（red/white）'
                ]);
                return;
            }
            // 验证颜色
            foreach ($coins as $coin) {
                if (!in_array($coin, ['red', 'white'])) {
                    echo json_encode([
                        'success' => false,
                        'message' => '硬币颜色只能是 red 或 white'
                    ]);
                    return;
                }
            }
        }

        // 计算结果
        $redCount = count(array_filter($coins, fn($c) => $c === 'red'));
        $result = $this->calculateXocdiaResult($redCount);

        // 获取当前登录的管理员ID（审核人）
        $approvedBy = isset($_SESSION['user_id']) ? (int)$_SESSION['user_id'] : null;

        // 更新期号数据
        $updateData = [
            'result' => json_encode($coins),
            'dice1' => $redCount,
            'dice2' => 4 - $redCount,
            'dice3' => null,
            'total' => null,
            'status' => 'drawn',
            'draw_time' => date('Y-m-d H:i:s'),
            'approved_by' => $approvedBy,
            'updated_at' => date('Y-m-d H:i:s')
        ];

        $responseData = [
            'coins' => $coins,
            'red_count' => $redCount,
            'white_count' => 4 - $redCount,
            'result' => $result
        ];

        try {
            $db->update('periods', $updateData, ['id' => $id]);

            echo json_encode([
                'success' => true,
                'message' => '开奖结果已录入',
                'data' => $responseData
            ]);
        } catch (\Exception $e) {
            echo json_encode([
                'success' => false,
                'message' => '录入失败：' . $e->getMessage()
            ]);
        }
    }

    /**
     * 启动新一期（开始下注）
     */
    public function start() {
        header('Content-Type: application/json');

        $data = $_POST;
        if (empty($data)) {
            $input = file_get_contents('php://input');
            $data = json_decode($input, true);
        }

        $gameId = isset($data['game_id']) ? (int)$data['game_id'] : 0;

        if ($gameId <= 0) {
            echo json_encode([
                'success' => false,
                'message' => '请选择游戏'
            ]);
            return;
        }

        $db = new Database();

        // 验证游戏类型
        $game = $db->get('games', ['type', 'stream_url'], ['id' => $gameId]);
        if (!$game || $game['type'] !== $this->gameType) {
            echo json_encode([
                'success' => false,
                'message' => '游戏不属于 Xóc Đĩa 游戏'
            ]);
            return;
        }

        // 检查该游戏是否有未结束的期号
        $activePeriod = $db->get('periods', '*', [
            'game_id' => $gameId,
            'status' => ['pending', 'locked', 'drawn']
        ]);

        if ($activePeriod) {
            echo json_encode([
                'success' => false,
                'message' => '该游戏当前有未结束的期号，无法开始新一轮'
            ]);
            return;
        }

        // 生成期号
        $periodNumber = $this->generatePeriodNumber($db, $gameId);

        // 获取stream_url
        $streamUrl = !empty($game['stream_url']) ? $game['stream_url'] : null;

        $periodData = [
            'period_number' => $periodNumber,
            'status' => 'pending',
            'game_id' => $gameId,
            'stream_url' => $streamUrl,
            'start_time' => date('Y-m-d H:i:s'),
            'auto_generated' => 0,
            'created_at' => date('Y-m-d H:i:s'),
            'updated_at' => date('Y-m-d H:i:s')
        ];

        try {
            $id = $db->insert('periods', $periodData);

            echo json_encode([
                'success' => true,
                'message' => '新一期已启动，开始下注',
                'data' => [
                    'id' => $id,
                    'period_number' => $periodNumber,
                    'start_time' => $periodData['start_time']
                ]
            ]);
        } catch (\Exception $e) {
            echo json_encode([
                'success' => false,
                'message' => '启动失败：' . $e->getMessage()
            ]);
        }
    }

    /**
     * 确认开奖并结算
     */
    public function settle() {
        ob_clean();
        header('Content-Type: application/json');

        $data = $_POST;
        if (empty($data)) {
            $input = file_get_contents('php://input');
            $data = json_decode($input, true);
        }

        $id = isset($data['id']) ? (int)$data['id'] : 0;

        if ($id <= 0) {
            echo json_encode([
                'success' => false,
                'message' => '无效的期号ID'
            ]);
            return;
        }

        $db = new Database();

        // 获取期号信息
        $period = $db->get('periods', '*', ['id' => $id]);
        if (!$period) {
            echo json_encode([
                'success' => false,
                'message' => '期号不存在'
            ]);
            return;
        }

        // 验证是否为 Xóc Đĩa 游戏
        $game = $db->get('games', ['type'], ['id' => $period['game_id']]);
        if (!$game || $game['type'] !== $this->gameType) {
            echo json_encode([
                'success' => false,
                'message' => '期号不属于 Xóc Đĩa 游戏'
            ]);
            return;
        }

        // 检查期号状态
        if ($period['status'] !== 'drawn') {
            echo json_encode([
                'success' => false,
                'message' => '该期号还未开奖，无法结算'
            ]);
            return;
        }

        if ($period['status'] === 'settled') {
            echo json_encode([
                'success' => false,
                'message' => '该期号已结算'
            ]);
            return;
        }

        try {
            // 开启事务
            $db->medoo->pdo->beginTransaction();

            // 获取本期所有待结算注单
            $bets = $db->select('bets', '*', [
                'period_id' => $id,
                'status' => 'pending'
            ]);

            // 遍历注单进行结算
            if ($bets) {
                foreach ($bets as $bet) {
                    $checkResult = $this->checkWin($bet, $period);
                    $isWin = $checkResult['win'];
                    $winAmount = $checkResult['amount'];

                    $now = date('Y-m-d H:i:s');

                    if ($isWin) {
                        $payout = $bet['amount'] + $winAmount;

                        // 更新注单状态
                        $db->update('bets', [
                            'status' => 'win',
                            'win_amount' => $winAmount,
                            'settled_at' => $now,
                            'updated_at' => $now
                        ], ['id' => $bet['id']]);

                        // 更新用户余额
                        $db->update('users', [
                            'balance[+]' => $payout
                        ], ['id' => $bet['user_id']]);

                        // 获取更新后的余额
                        $user = $db->get('users', ['balance'], ['id' => $bet['user_id']]);
                        $balanceAfter = $user['balance'];
                        $balanceBefore = $balanceAfter - $payout;

                        // 写入资金流水
                        $db->insert('transactions', [
                            'user_id' => $bet['user_id'],
                            'type' => 'win',
                            'amount' => $payout,
                            'balance_before' => $balanceBefore,
                            'balance_after' => $balanceAfter,
                            'related_id' => $bet['id'],
                            'description' => "中奖 - 期号: " . $period['period_number'],
                            'created_at' => $now
                        ]);

                    } else {
                        // 未中奖
                        $db->update('bets', [
                            'status' => 'lose',
                            'win_amount' => 0,
                            'settled_at' => $now,
                            'updated_at' => $now
                        ], ['id' => $bet['id']]);
                    }
                }
            }

            // 更新期号状态为已结算
            $db->update('periods', [
                'status' => 'settled',
                'updated_at' => date('Y-m-d H:i:s')
            ], ['id' => $id]);

            // 提交事务
            $db->medoo->pdo->commit();

            echo json_encode([
                'success' => true,
                'message' => '结算成功，请点击"开始下注"启动下一期',
                'data' => [
                    'current_period_id' => $id
                ]
            ]);
        } catch (\Exception $e) {
            // 回滚事务
            if (isset($db->medoo->pdo)) {
                $db->medoo->pdo->rollBack();
            }

            echo json_encode([
                'success' => false,
                'message' => '结算失败：' . $e->getMessage()
            ]);
        }
    }

    /**
     * 封盘
     */
    public function lock() {
        header('Content-Type: application/json');

        $data = $_POST;
        if (empty($data)) {
            $input = file_get_contents('php://input');
            $data = json_decode($input, true);
        }
        $id = isset($data['id']) ? (int)$data['id'] : 0;

        if ($id <= 0) {
            echo json_encode([
                'success' => false,
                'message' => '无效的期号ID'
            ]);
            return;
        }

        $db = new Database();

        // 获取期号信息
        $period = $db->get('periods', '*', ['id' => $id]);
        if (!$period) {
            echo json_encode([
                'success' => false,
                'message' => '期号不存在'
            ]);
            return;
        }

        // 验证是否为 Xóc Đĩa 游戏
        $game = $db->get('games', ['type'], ['id' => $period['game_id']]);
        if (!$game || $game['type'] !== $this->gameType) {
            echo json_encode([
                'success' => false,
                'message' => '期号不属于 Xóc Đĩa 游戏'
            ]);
            return;
        }

        // 检查期号状态
        if ($period['status'] !== 'pending') {
            echo json_encode([
                'success' => false,
                'message' => '该期号状态不允许封盘'
            ]);
            return;
        }

        try {
            $db->update('periods', [
                'status' => 'locked',
                'end_time' => date('Y-m-d H:i:s'),
                'updated_at' => date('Y-m-d H:i:s')
            ], ['id' => $id]);

            echo json_encode([
                'success' => true,
                'message' => '封盘成功'
            ]);
        } catch (\Exception $e) {
            echo json_encode([
                'success' => false,
                'message' => '封盘失败：' . $e->getMessage()
            ]);
        }
    }

    /**
     * 生成期号
     */
    private function generatePeriodNumber($db, $gameId) {
        $now = new \DateTime();
        $dateStr = $now->format('Ymd');
        $prefix = "G{$gameId}{$dateStr}";

        try {
            $lastPeriod = $db->get('periods', 'period_number', [
                'period_number[~]' => $prefix . '%',
                'ORDER' => ['period_number' => 'DESC']
            ]);

            if ($lastPeriod) {
                $lastSeq = substr($lastPeriod, strlen($prefix));
                $newSeq = (int)$lastSeq + 1;
                $seqStr = str_pad((string)$newSeq, 4, '0', STR_PAD_LEFT);
            } else {
                $seqStr = '0001';
            }

            return $prefix . $seqStr;

        } catch (\Throwable $e) {
            return $prefix . time();
        }
    }

    /**
     * 检查注单是否中奖
     */
    private function checkWin($bet, $period) {
        $betType = $bet['bet_type'];
        $betValue = $bet['bet_value'];
        $betAmount = (float)$bet['amount'];
        $gameId = $period['game_id'];

        $db = new Database();

        // 获取赔率配置
        static $oddsCache = [];
        if (!isset($oddsCache[$gameId])) {
            $oddsData = $db->select('game_odds', '*', ['game_id' => $gameId]);
            $oddsCache[$gameId] = [];
            foreach ($oddsData as $odd) {
                $key = $odd['type'] . '_' . $odd['target'];
                $oddsCache[$gameId][$key] = (float)$odd['odds'];
            }
        }

        $isWin = false;
        $payoutMultiplier = 0;

        // 获取赔率
        $getOdds = function($type, $target = 'all') use ($oddsCache, $gameId) {
            $key = $type . '_' . $target;
            if (isset($oddsCache[$gameId][$key])) {
                return $oddsCache[$gameId][$key];
            }
            $allKey = $type . '_all';
            return $oddsCache[$gameId][$allKey] ?? 0;
        };

        // Xóc Đĩa 游戏结算逻辑
        $coins = json_decode($period['result'], true);
        if (!is_array($coins) || count($coins) !== 4) {
            return ['win' => false, 'amount' => 0];
        }

        $redCount = count(array_filter($coins, fn($c) => $c === 'red'));
        $whiteCount = 4 - $redCount;

        switch ($betType) {
            case 'chan': // 双(偶): 4红 或 4白 或 2红2白
                if (in_array($redCount, [0, 2, 4])) {
                    $isWin = true;
                    $payoutMultiplier = $getOdds('chan', $betValue);
                }
                break;

            case 'le': // 单(奇): 3红1白 或 3白1红
                if (in_array($redCount, [1, 3])) {
                    $isWin = true;
                    $payoutMultiplier = $getOdds('le', $betValue);
                }
                break;

            case 'exact': // 精确颜色组合
                switch ($betValue) {
                    case '4red':
                        if ($redCount === 4) $isWin = true;
                        break;
                    case '4white':
                        if ($redCount === 0) $isWin = true;
                        break;
                    case '3red1white':
                        if ($redCount === 3) $isWin = true;
                        break;
                    case '3white1red':
                        if ($redCount === 1) $isWin = true;
                        break;
                }
                if ($isWin) {
                    $payoutMultiplier = $getOdds('exact', $betValue);
                }
                break;
        }

        if ($isWin && $payoutMultiplier > 0) {
            return [
                'win' => true,
                'amount' => $betAmount * $payoutMultiplier
            ];
        }

        return ['win' => false, 'amount' => 0];
    }

    /**
     * 计算 Xóc Đĩa 开奖结果
     */
    private function calculateXocdiaResult($redCount) {
        switch ($redCount) {
            case 0:
                return '4 Trắng (Chẵn)';
            case 1:
                return '3 Trắng 1 Đỏ (Lẻ)';
            case 2:
                return '2 Trắng 2 Đỏ (Chẵn)';
            case 3:
                return '3 Đỏ 1 Trắng (Lẻ)';
            case 4:
                return '4 Đỏ (Chẵn)';
            default:
                return 'Không xác định';
        }
    }
}