<?php

namespace App\Module\Point\Services;

use App\Module\Point\Dto\PointLogDto;
use App\Module\Point\Models\PointLogModel;
use App\Module\Point\Enums\LOG_TYPE;

/**
 * 积分日志服务类
 *
 * 提供积分日志相关的业务功能
 */
class LogService
{
    /**
     * 获取用户积分日志
     *
     * @param int $userId 用户ID
     * @param int|null $pointId 积分类型ID（可选）
     * @param int $limit 限制数量
     * @return array 日志DTO数组
     */
    public static function getUserLogs(int $userId, ?int $pointId = null, int $limit = 50): array
    {
        $logs = PointLogModel::getUserLogs($userId, $pointId, $limit);
        $result = [];

        foreach ($logs as $log) {
            $result[] = new PointLogDto([
                'id' => $log->id,
                'user_id' => $log->user_id,
                'point_id' => $log->point_id,
                'amount' => $log->amount,
                'operate_id' => $log->operate_id,
                'operate_type' => $log->operate_type->value,
                'operate_type_name' => $log->getOperateTypeName(),
                'remark' => $log->remark,
                'create_time' => $log->create_time,
                'create_ip' => $log->create_ip,
                'later_balance' => $log->later_balance,
                'before_balance' => $log->before_balance,
                'is_income' => $log->isIncome(),
                'is_expense' => $log->isExpense(),
            ]);
        }

        return $result;
    }

    /**
     * 获取用户指定时间范围的积分日志
     *
     * @param int $userId 用户ID
     * @param int $startTime 开始时间
     * @param int $endTime 结束时间
     * @param int|null $pointId 积分类型ID（可选）
     * @return array 日志DTO数组
     */
    public static function getUserLogsByTimeRange(
        int $userId,
        int $startTime,
        int $endTime,
        ?int $pointId = null
    ): array {
        $logs = PointLogModel::getUserLogsByTimeRange($userId, $startTime, $endTime, $pointId);
        $result = [];

        foreach ($logs as $log) {
            $result[] = new PointLogDto([
                'id' => $log->id,
                'user_id' => $log->user_id,
                'point_id' => $log->point_id,
                'amount' => $log->amount,
                'operate_id' => $log->operate_id,
                'operate_type' => $log->operate_type->value,
                'operate_type_name' => $log->getOperateTypeName(),
                'remark' => $log->remark,
                'create_time' => $log->create_time,
                'create_ip' => $log->create_ip,
                'later_balance' => $log->later_balance,
                'before_balance' => $log->before_balance,
                'is_income' => $log->isIncome(),
                'is_expense' => $log->isExpense(),
            ]);
        }

        return $result;
    }

    /**
     * 获取用户积分收支统计
     *
     * @param int $userId 用户ID
     * @param int|null $pointId 积分类型ID（可选）
     * @param int|null $startTime 开始时间（可选）
     * @param int|null $endTime 结束时间（可选）
     * @return array 统计信息
     */
    public static function getUserPointStats(
        int $userId,
        ?int $pointId = null,
        ?int $startTime = null,
        ?int $endTime = null
    ): array {
        $query = PointLogModel::where('user_id', $userId);

        if ($pointId !== null) {
            $query->where('point_id', $pointId);
        }

        if ($startTime !== null && $endTime !== null) {
            $query->whereBetween('create_time', [$startTime, $endTime]);
        }

        $logs = $query->get();

        $stats = [
            'total_logs' => $logs->count(),
            'total_income' => 0,
            'total_expense' => 0,
            'income_count' => 0,
            'expense_count' => 0,
            'by_operate_type' => [],
        ];

        foreach ($logs as $log) {
            if ($log->isIncome()) {
                $stats['total_income'] += $log->amount;
                $stats['income_count']++;
            } else {
                $stats['total_expense'] += abs($log->amount);
                $stats['expense_count']++;
            }

            $operateTypeName = $log->getOperateTypeName();
            if (!isset($stats['by_operate_type'][$operateTypeName])) {
                $stats['by_operate_type'][$operateTypeName] = [
                    'count' => 0,
                    'total_amount' => 0,
                ];
            }
            $stats['by_operate_type'][$operateTypeName]['count']++;
            $stats['by_operate_type'][$operateTypeName]['total_amount'] += $log->amount;
        }

        return $stats;
    }

    /**
     * 验证日志记录的完整性
     *
     * @param int $logId 日志ID
     * @return bool 是否完整
     */
    public static function verifyLogIntegrity(int $logId): bool
    {
        $log = PointLogModel::find($logId);
        return $log ? $log->verifyIntegrity() : false;
    }

    /**
     * 批量验证日志记录的完整性
     *
     * @param array $logIds 日志ID数组
     * @return array 验证结果数组
     */
    public static function batchVerifyLogIntegrity(array $logIds): array
    {
        $results = [];
        
        foreach ($logIds as $logId) {
            $results[$logId] = self::verifyLogIntegrity($logId);
        }

        return $results;
    }

    /**
     * 获取积分日志统计信息（按操作类型）
     *
     * @param int|null $pointId 积分类型ID（可选）
     * @param int|null $startTime 开始时间（可选）
     * @param int|null $endTime 结束时间（可选）
     * @return array 统计信息
     */
    public static function getLogStatsByOperateType(
        ?int $pointId = null,
        ?int $startTime = null,
        ?int $endTime = null
    ): array {
        $query = PointLogModel::query();

        if ($pointId !== null) {
            $query->where('point_id', $pointId);
        }

        if ($startTime !== null && $endTime !== null) {
            $query->whereBetween('create_time', [$startTime, $endTime]);
        }

        $logs = $query->get();
        $stats = [];

        foreach ($logs as $log) {
            $operateType = $log->operate_type->value;
            $operateTypeName = $log->getOperateTypeName();

            if (!isset($stats[$operateType])) {
                $stats[$operateType] = [
                    'operate_type' => $operateType,
                    'operate_type_name' => $operateTypeName,
                    'count' => 0,
                    'total_amount' => 0,
                    'income_count' => 0,
                    'expense_count' => 0,
                    'income_amount' => 0,
                    'expense_amount' => 0,
                ];
            }

            $stats[$operateType]['count']++;
            $stats[$operateType]['total_amount'] += $log->amount;

            if ($log->isIncome()) {
                $stats[$operateType]['income_count']++;
                $stats[$operateType]['income_amount'] += $log->amount;
            } else {
                $stats[$operateType]['expense_count']++;
                $stats[$operateType]['expense_amount'] += abs($log->amount);
            }
        }

        return array_values($stats);
    }

    /**
     * 获取每日积分变化统计
     *
     * @param int $userId 用户ID
     * @param int $pointId 积分类型ID
     * @param int $days 统计天数
     * @return array 每日统计数组
     */
    public static function getDailyPointStats(int $userId, int $pointId, int $days = 30): array
    {
        $endTime = time();
        $startTime = $endTime - ($days * 24 * 60 * 60);

        $logs = PointLogModel::where('user_id', $userId)
            ->where('point_id', $pointId)
            ->whereBetween('create_time', [$startTime, $endTime])
            ->orderBy('create_time')
            ->get();

        $dailyStats = [];
        
        // 初始化每日统计
        for ($i = 0; $i < $days; $i++) {
            $date = date('Y-m-d', $endTime - ($i * 24 * 60 * 60));
            $dailyStats[$date] = [
                'date' => $date,
                'income' => 0,
                'expense' => 0,
                'net_change' => 0,
                'log_count' => 0,
            ];
        }

        // 统计每日数据
        foreach ($logs as $log) {
            $date = date('Y-m-d', $log->create_time);
            
            if (isset($dailyStats[$date])) {
                $dailyStats[$date]['log_count']++;
                
                if ($log->isIncome()) {
                    $dailyStats[$date]['income'] += $log->amount;
                } else {
                    $dailyStats[$date]['expense'] += abs($log->amount);
                }
                
                $dailyStats[$date]['net_change'] = $dailyStats[$date]['income'] - $dailyStats[$date]['expense'];
            }
        }

        return array_values($dailyStats);
    }

    /**
     * 搜索积分日志
     *
     * @param array $filters 搜索条件
     * @param int $limit 限制数量
     * @return array 日志数组
     */
    public static function searchLogs(array $filters, int $limit = 50): array
    {
        $query = PointLogModel::query();

        if (isset($filters['user_id'])) {
            $query->where('user_id', $filters['user_id']);
        }

        if (isset($filters['point_id'])) {
            $query->where('point_id', $filters['point_id']);
        }

        if (isset($filters['operate_type'])) {
            $query->where('operate_type', $filters['operate_type']);
        }

        if (isset($filters['operate_id'])) {
            $query->where('operate_id', 'like', '%' . $filters['operate_id'] . '%');
        }

        if (isset($filters['start_time']) && isset($filters['end_time'])) {
            $query->whereBetween('create_time', [$filters['start_time'], $filters['end_time']]);
        }

        if (isset($filters['min_amount'])) {
            $query->where('amount', '>=', $filters['min_amount']);
        }

        if (isset($filters['max_amount'])) {
            $query->where('amount', '<=', $filters['max_amount']);
        }

        $logs = $query->orderBy('create_time', 'desc')->limit($limit)->get();
        $result = [];

        foreach ($logs as $log) {
            $result[] = [
                'id' => $log->id,
                'user_id' => $log->user_id,
                'point_id' => $log->point_id,
                'amount' => $log->amount,
                'operate_id' => $log->operate_id,
                'operate_type' => $log->operate_type->value,
                'operate_type_name' => $log->getOperateTypeName(),
                'remark' => $log->remark,
                'create_time' => $log->create_time,
                'create_ip' => $log->create_ip,
                'later_balance' => $log->later_balance,
                'before_balance' => $log->before_balance,
                'is_income' => $log->isIncome(),
                'is_expense' => $log->isExpense(),
            ];
        }

        return $result;
    }
}