<?php
namespace App\Controllers\Admin;

use App\Core\AdminBaseController;
use App\Core\PK10Algorithm;
use Db\Database;

class PK10PeriodController extends AdminBaseController {
    private $db;

    public function __construct(Database $db) {
        $this->db = $db;
    }

    public function index() {
        $this->checkLogin();
        $gameId = $this->getGameId();

        $periods = $this->db->select('periods', '*', [
            'game_id' => $gameId,
            'ORDER' => ['id' => 'DESC'],
            'LIMIT' => 50
        ]);

        // 附加pk10_results
        foreach ($periods as &$p) {
            $p['pk10'] = $this->db->get('pk10_results', '*', ['period_id' => $p['id']]);
        }

        $current = $this->db->get('periods', '*', [
            'game_id' => $gameId,
            'status[!]' => 'settled',
            'ORDER' => ['id' => 'DESC']
        ]);
        if ($current) {
            $current['pk10'] = $this->db->get('pk10_results', '*', ['period_id' => $current['id']]);
        }

        $stats = [
            'total' => $this->db->count('periods', ['game_id' => $gameId]),
            'pending' => $this->db->count('periods', ['game_id' => $gameId, 'status' => 'pending']),
            'drawn' => $this->db->count('periods', ['game_id' => $gameId, 'status' => 'drawn']),
            'settled' => $this->db->count('periods', ['game_id' => $gameId, 'status' => 'settled']),
        ];

        $this->render('Admin/pk10_periods.php', compact('periods', 'current', 'stats', 'gameId'));
    }

    public function start() {
        $this->checkLogin();
        $gameId = $this->getGameId();

        // 检查是否有未结算期号
        $active = $this->db->get('periods', 'id', [
            'game_id' => $gameId,
            'status[!]' => 'settled'
        ]);
        if ($active) {
            $this->json(['status' => 'error', 'message' => 'There is an active period. Please settle it first.']);
            return;
        }

        $periodNumber = PK10Algorithm::generatePeriodNumber($gameId);
        $this->db->insert('periods', [
            'game_id' => $gameId,
            'period_number' => $periodNumber,
            'status' => 'pending',
            'created_at' => date('Y-m-d H:i:s'),
        ]);

        $this->json(['status' => 'success', 'message' => 'New period started', 'period_number' => $periodNumber]);
    }

    public function lock() {
        $this->checkLogin();
        $data = json_decode(file_get_contents('php://input'), true);
        $periodId = (int)($data['period_id'] ?? 0);

        $period = $this->db->get('periods', '*', ['id' => $periodId]);
        if (!$period || $period['status'] !== 'pending') {
            $this->json(['status' => 'error', 'message' => 'Invalid period or status']);
            return;
        }

        $this->db->update('periods', ['status' => 'locked'], ['id' => $periodId]);
        $this->json(['status' => 'success', 'message' => 'Period locked']);
    }

    public function draw() {
        $this->checkLogin();
        $data = json_decode(file_get_contents('php://input'), true);
        $periodId = (int)($data['period_id'] ?? 0);
        $manual = $data['manual'] ?? false;

        $period = $this->db->get('periods', '*', ['id' => $periodId]);
        if (!$period || !in_array($period['status'], ['pending', 'locked'])) {
            $this->json(['status' => 'error', 'message' => 'Invalid period or status']);
            return;
        }

        $gameId = $period['game_id'];

        if ($manual && !empty($data['result'])) {
            // 手动补开奖
            $result = array_map('intval', $data['result']);
            if (count($result) !== 10 || count(array_unique($result)) !== 10) {
                $this->json(['status' => 'error', 'message' => 'Result must be 10 unique numbers 1-10']);
                return;
            }
        } else {
            // 自动开奖（带放水机制）
            $waterConfig = [];
            $wc = $this->db->select('water_control', '*', ['game_id' => $gameId, 'enabled' => 1]);
            foreach ($wc as $w) {
                $waterConfig[$w['bet_type']] = (float)$w['win_rate_pct'];
            }

            $bets = $this->db->select('bets', '*', [
                'period_id' => $periodId,
                'status' => 'pending',
                'is_virtual' => 0
            ]);

            if (!empty($waterConfig) && !empty($bets)) {
                $result = PK10Algorithm::generateControlledResult($bets, $waterConfig);
            } else {
                $result = PK10Algorithm::generateResult();
            }
        }

        $sum = $result[0] + $result[1];
        $resultJson = json_encode($result);

        $this->db->medoo->pdo->beginTransaction();
        try {
            $this->db->update('periods', [
                'status' => 'drawn',
                'result' => $resultJson,
                'draw_time' => date('Y-m-d H:i:s'),
            ], ['id' => $periodId]);

            // 删除旧结果（如果手动修改）
            $this->db->delete('pk10_results', ['period_id' => $periodId]);

            $this->db->insert('pk10_results', [
                'period_id' => $periodId,
                'rank_1' => $result[0], 'rank_2' => $result[1], 'rank_3' => $result[2],
                'rank_4' => $result[3], 'rank_5' => $result[4], 'rank_6' => $result[5],
                'rank_7' => $result[6], 'rank_8' => $result[7], 'rank_9' => $result[8],
                'rank_10' => $result[9], 'champion_sum' => $sum,
            ]);

            $this->db->medoo->pdo->commit();
        } catch (\Throwable $e) {
            $this->db->medoo->pdo->rollBack();
            $this->json(['status' => 'error', 'message' => 'Draw failed: ' . $e->getMessage()]);
            return;
        }

        $this->json(['status' => 'success', 'message' => 'Draw completed', 'result' => $result, 'sum' => $sum]);
    }

    public function settle() {
        $this->checkLogin();
        $data = json_decode(file_get_contents('php://input'), true);
        $periodId = (int)($data['period_id'] ?? 0);

        $period = $this->db->get('periods', '*', ['id' => $periodId]);
        if (!$period || $period['status'] !== 'drawn') {
            $this->json(['status' => 'error', 'message' => 'Period must be drawn first']);
            return;
        }

        $result = json_decode($period['result'], true);
        if (!$result || count($result) !== 10) {
            $this->json(['status' => 'error', 'message' => 'Invalid result data']);
            return;
        }

        $bets = $this->db->select('bets', '*', ['period_id' => $periodId, 'status' => 'pending']);
        if (empty($bets)) {
            $this->db->update('periods', ['status' => 'settled'], ['id' => $periodId]);
            $this->json(['status' => 'success', 'message' => 'No bets to settle', 'wins' => 0, 'losses' => 0]);
            return;
        }

        $wins = 0; $losses = 0; $totalPayout = 0;

        $this->db->medoo->pdo->beginTransaction();
        try {
            foreach ($bets as $bet) {
                $isWin = PK10Algorithm::checkWin($result, $bet['bet_type'], $bet['bet_value']);
                $betAmount = (float)$bet['amount'];
                $odds = (float)$bet['odds'];

                if ($isWin) {
                    $winAmount = $betAmount * $odds;
                    $payout = $betAmount + $winAmount;
                    $this->db->update('bets', [
                        'status' => 'win',
                        'win_amount' => $winAmount,
                    ], ['id' => $bet['id']]);

                    $stmt = $this->db->medoo->pdo->prepare("SELECT balance FROM users WHERE id = :id FOR UPDATE");
                    $stmt->execute([':id' => $bet['user_id']]);
                    $user = $stmt->fetch(\PDO::FETCH_ASSOC);
                    $newBalance = (float)$user['balance'] + $payout;

                    $this->db->update('users', ['balance' => $newBalance], ['id' => $bet['user_id']]);
                    $this->db->insert('transactions', [
                        'user_id' => $bet['user_id'],
                        'type' => 'win',
                        'amount' => $payout,
                        'balance_before' => $user['balance'],
                        'balance_after' => $newBalance,
                        'related_id' => $periodId,
                        'description' => 'PK10 Win - Period ' . $period['period_number'],
                        'is_virtual' => $bet['is_virtual'],
                        'created_at' => date('Y-m-d H:i:s'),
                    ]);
                    $totalPayout += $payout;
                    $wins++;
                } else {
                    $this->db->update('bets', ['status' => 'lose', 'win_amount' => 0], ['id' => $bet['id']]);
                    $losses++;
                }
            }

            // 计算代理佣金
            $this->settleAgentCommissions($bets, $periodId);

            $this->db->update('periods', ['status' => 'settled'], ['id' => $periodId]);
            $this->db->medoo->pdo->commit();
        } catch (\Throwable $e) {
            $this->db->medoo->pdo->rollBack();
            $this->json(['status' => 'error', 'message' => 'Settle failed: ' . $e->getMessage()]);
            return;
        }

        $this->json(['status' => 'success', 'message' => 'Settlement completed',
            'wins' => $wins, 'losses' => $losses, 'total_payout' => $totalPayout]);
    }

    private function settleAgentCommissions(array $bets, int $periodId) {
        $agentBets = [];
        foreach ($bets as $bet) {
            if ((int)$bet['is_virtual']) continue;
            $user = $this->db->get('users', ['agent_id'], ['id' => $bet['user_id']]);
            if (!$user || !$user['agent_id']) continue;
            $agentId = $user['agent_id'];
            if (!isset($agentBets[$agentId])) $agentBets[$agentId] = 0;
            $agentBets[$agentId] += (float)$bet['amount'];
        }

        foreach ($agentBets as $agentId => $totalBet) {
            $agent = $this->db->get('agents', '*', ['id' => $agentId, 'status' => 1]);
            if (!$agent) continue;
            $commission = $totalBet * $agent['commission_rate'] / 100;
            if ($commission <= 0) continue;

            $this->db->insert('agent_commissions', [
                'agent_id' => $agentId,
                'from_user_id' => 0,
                'period_id' => $periodId,
                'bet_amount' => $totalBet,
                'commission' => $commission,
                'type' => 'bet',
                'created_at' => date('Y-m-d H:i:s'),
            ]);

            // 佣金加到代理用户余额
            $agentUserId = $agent['user_id'];
            $stmt = $this->db->medoo->pdo->prepare("SELECT balance FROM users WHERE id = :id FOR UPDATE");
            $stmt->execute([':id' => $agentUserId]);
            $au = $stmt->fetch(\PDO::FETCH_ASSOC);
            $newBal = (float)$au['balance'] + $commission;
            $this->db->update('users', ['balance' => $newBal], ['id' => $agentUserId]);
            $this->db->insert('transactions', [
                'user_id' => $agentUserId, 'type' => 'commission',
                'amount' => $commission, 'balance_before' => $au['balance'],
                'balance_after' => $newBal, 'related_id' => $periodId,
                'description' => 'Agent commission', 'created_at' => date('Y-m-d H:i:s'),
            ]);
        }
    }

    public function get($id) {
        $this->checkLogin();
        $period = $this->db->get('periods', '*', ['id' => (int)$id]);
        if ($period) {
            $period['pk10'] = $this->db->get('pk10_results', '*', ['period_id' => $period['id']]);
        }
        $this->json(['status' => 'success', 'data' => $period]);
    }

    private function getGameId(): int {
        $game = $this->db->get('games', 'id', ['code' => 'pk10']);
        return $game ? (int)$game : 0;
    }

    private function json(array $data) {
        header('Content-Type: application/json');
        echo json_encode($data);
    }
}