<?php

namespace App\Services\Client\Traits;

use Carbon\Carbon;
use App\Models\Order;
use App\Models\CoachUser;
use App\Enums\OrderStatus;
use App\Models\CoachSchedule;
use App\Enums\TechnicianStatus;
use App\Enums\TechnicianAuthStatus;
use Illuminate\Support\Facades\Log;

/**
 * 服务时间验证 Trait
 *
 * 业务规则：
 * 1. 技师状态验证：
 *    - 技师必须存在且状态为激活
 *    - 技师必须通过认证
 *
 * 2. 服务时间验证：
 *    - 服务时间不能早于当前时间
 *    - 最多只能提前7天预约
 *    - 必须在技师的工作时间内
 *    - 不能与其他订单时间冲突
 *
 * 3. 工作时间规则：
 *    - 默认工作时间为 09:00-21:00
 *    - 可以通过排班设置自定义工作时间
 *    - 支持设置特殊休息日
 *
 * 4. 订单冲突规则：
 *    - 检查已支付、已接单、服务中的订单
 *    - 考虑服务时长（默认2小时）
 *    - 开始时间不能在其他订单的服务时间段内
 *    - 结束时间不能在其他订单的服务时间段内
 */
trait ValidatesServiceTime
{
    /**
     * 验证服务时间
     *
     * @param  int  $coachId  技师ID
     * @param  string  $serviceTime  服务时间(格式：Y-m-d H:i:s)
     * @param  int  $duration  服务时长(分钟)
     * @return bool
     *
     * @throws \Exception 验证失败时抛出异常
     */
    public function validateServiceTime(int $coachId, string $serviceTime, int $duration): bool
    {
        try {
            Log::info('开始验证服务时间', [
                'coach_id' => $coachId,
                'service_time' => $serviceTime,
                'duration' => $duration
            ]);

            // 验证基本参数
            Log::info('开始验证基本参数');
            $this->validateServiceTimeParams($coachId, $serviceTime, $duration);
            Log::info('基本参数验证通过');

            Log::info('服务时间验证通过');
            return true;
        } catch (\Exception $e) {
            Log::error('验证服务时间失败', [
                'coach_id' => $coachId,
                'service_time' => $serviceTime,
                'duration' => $duration,
                'error_message' => $e->getMessage(),
                'error_code' => $e->getCode(),
                'error_file' => $e->getFile(),
                'error_line' => $e->getLine(),
                'error_trace' => $e->getTraceAsString()
            ]);
            throw $e;
        }
    }

    /**
     * 验证服务时间参数
     *
     * @param  int  $coachId  技师ID
     * @param  string  $serviceTime  服务时间(格式：Y-m-d H:i:s)
     * @param  int  $duration  服务时长(分钟)
     *
     * @throws \Exception 验证失败时抛出异常
     */
    private function validateServiceTimeParams(int $coachId, string $serviceTime, int $duration): void
    {
        Log::info('开始验证技师状态', ['coach_id' => $coachId]);
        // 验证技师状态
        $coach = CoachUser::query()
            ->with(['info'])
            ->where('id', $coachId)
            ->where('state', TechnicianStatus::ACTIVE->value)
            ->first();

        abort_if(! $coach, 400, '技师不存在或未激活');
        Log::info('技师状态验证通过', ['coach' => $coach->toArray()]);

        // 验证技师认证状态
        Log::info('开始验证技师认证状态');
        abort_if(
            ! $coach->info || $coach->info->state !== TechnicianAuthStatus::PASSED->value,
            400,
            '技师未通过认证'
        );
        Log::info('技师认证状态验证通过');

        // 验证服务时间基本参数
        Log::info('开始验证服务时间基本参数', ['service_time' => $serviceTime]);
        $this->validateBasicServiceTime($serviceTime);
        Log::info('服务时间基本参数验证通过');

        // 验证技师工作时间
        Log::info('开始验证技师工作时间');
        $workSchedule = $this->getCoachWorkSchedule($coachId);
        Log::info('获取到技师排班信息', ['work_schedule' => $workSchedule]);

        $serviceDateTime = Carbon::parse($serviceTime);
        $serviceEndTime = $serviceDateTime->copy()->addMinutes($duration);
        Log::info('计算服务时间', [
            'service_start' => $serviceDateTime->format('Y-m-d H:i:s'),
            'service_end' => $serviceEndTime->format('Y-m-d H:i:s'),
            'duration' => $duration
        ]);

        $this->validateWorkingHours($serviceDateTime, $serviceEndTime, $workSchedule);
        Log::info('技师工作时间验证通过');

        // 验证时间冲突
        Log::info('开始验证时间冲突');
        $this->checkTimeConflicts($coachId, $serviceDateTime, $serviceEndTime);
        Log::info('时间冲突验证通过');
    }

    /**
     * 验证服务时间基本参数
     *
     * 业务规则：
     * 1. 服务时间不能早于当前时间
     * 2. 最多只能提前7天预约
     *
     * @param  string  $serviceTime  服务时间
     *
     * @throws \Exception 验证失败时抛出异常
     */
    private function validateBasicServiceTime(string $serviceTime): void
    {
        $serviceDateTime = Carbon::parse($serviceTime);

        // 验证是否过期
        abort_if(
            $serviceDateTime->isPast(),
            400,
            '服务时间不能早于当前时间'
        );

        // 验证预约时间范围（最多提前7天）
        $maxAdvanceDays = config('business.max_advance_days', 7);
        abort_if(
            $serviceDateTime->diffInDays(now()) > $maxAdvanceDays,
            400,
            "最多只能提前{$maxAdvanceDays}天预约"
        );
    }

    /**
     * 获取技师工作时间安排
     *
     * 业务规则：
     * 1. 优先使用技师的自定义排班
     * 2. 如果没有排班，使用默认时间（09:00-21:00）
     * 3. 默认每天都工作
     *
     * @param  int  $coachId  技师ID
     * @return array 工作时间安排
     */
    private function getCoachWorkSchedule(int $coachId): array
    {
        Log::info('开始获取技师排班信息', ['coach_id' => $coachId]);

        $schedule = CoachSchedule::where('coach_id', $coachId)
            ->where('state', 1)
            ->first();

        Log::info('查询技师排班记录', [
            'coach_id' => $coachId,
            'has_schedule' => !is_null($schedule),
            'schedule' => $schedule ? $schedule->toArray() : null
        ]);

        if (! $schedule) {
            $defaultSchedule = [
                'work_days' => range(1, 7),
                'work_hours' => [
                    [
                        'start' => '09:00',
                        'end' => '21:00',
                    ]
                ],
                'rest_dates' => [],
            ];
            Log::info('未找到排班记录，使用默认排班', ['default_schedule' => $defaultSchedule]);
            return $defaultSchedule;
        }

        $timeRanges = is_string($schedule->time_ranges)
            ? json_decode($schedule->time_ranges, true)
            : $schedule->time_ranges;

        Log::info('解析排班时间范围', [
            'raw_time_ranges' => $schedule->time_ranges,
            'parsed_time_ranges' => $timeRanges
        ]);

        // 从排班表中获取工作日
        $workDays = [];
        $workHours = [];
        foreach ($timeRanges as $index => $range) {
            Log::info('处理时间范围', [
                'index' => $index,
                'range' => $range
            ]);

            $workHours[] = [
                'start' => $range['start_time'],
                'end' => $range['end_time'],
            ];

            Log::info('更新工作时间', [
                'current_work_hours' => $workHours
            ]);
        }
        $workDays = array_unique($workDays);

        Log::info('处理工作日', [
            'initial_work_days' => $workDays
        ]);

        // 如果没有设置工作日，则默认每天都工作
        if (empty($workDays)) {
            $workDays = range(1, 7);
            Log::info('未设置工作日，使用默认每天工作', [
                'default_work_days' => $workDays
            ]);
        }

        $result = [
            'work_days' => $workDays,
            'work_hours' => $workHours,
        ];

        Log::info('获取技师排班信息完成', [
            'final_schedule' => $result
        ]);

        return $result;
    }

    /**
     * 验证是否在工作时间内
     */
    private function validateWorkingHours(Carbon $serviceDateTime, Carbon $serviceEndTime, array $workSchedule): void
    {
        $isInSchedule = false;
        foreach ($workSchedule['work_hours'] as $range) {
            $rangeStart = Carbon::parse($serviceDateTime->format('Y-m-d') . ' ' . $range['start']);
            $rangeEnd = Carbon::parse($serviceDateTime->format('Y-m-d') . ' ' . $range['end']);

            if (
                $serviceDateTime->between($rangeStart, $rangeEnd)
            ) {
                $isInSchedule = true;
                break;
            }
        }

        abort_if(!$isInSchedule, 400, '所选时间不在技师服务时间范围内');
    }


    /**
     * 检查订单时间冲突
     */
    private function checkTimeConflicts(int $coachId, Carbon $serviceDateTime, Carbon $serviceEndTime): void
    {
        // 检查是否与其他订单时间重叠
        $conflictingOrders = Order::where('coach_id', $coachId)
            ->where(function ($query) use ($serviceDateTime, $serviceEndTime) {
                $query->where(function ($q) use ($serviceDateTime, $serviceEndTime) {
                    $q->where('service_start_time', '<=', $serviceEndTime->format('Y-m-d H:i:s'))
                        ->where('service_end_time', '>=', $serviceDateTime->format('Y-m-d H:i:s'));
                });
            })
            ->whereIn('state', [
                OrderStatus::ACCEPTED->value,
                OrderStatus::DEPARTED->value,
                OrderStatus::ARRIVED->value,
                OrderStatus::SERVICING->value,
            ])
            ->exists();

        abort_if($conflictingOrders, 400, '该时间段技师已有其他预约');
    }
}