<?php

namespace App\Services\Client;

use App\Models\Project;
use App\Models\AgentInfo;
use App\Models\CoachUser;
use App\Enums\AgentStatus;
use App\Enums\ProjectType;
use App\Models\ProjectCate;
use App\Enums\ProjectStatus;
use App\Enums\AgentAuditStatus;
use App\Enums\TechnicianStatus;
use App\Enums\TechnicianAuthStatus;
use Illuminate\Support\Facades\Cache;

class ProjectService
{
    /**
     * 获取项目列表
     * 根据区域代码和分类获取可用的项目列表
     *
     * @param string $areaCode 区域代码(6位数字)
     * @param int|null $projectCateId 项目分类ID
     * @param int $type 项目类型(1:普通项目,2:加钟项目)
     * @param int $perPage 每页数量
     * @return mixed
     */
    public function getProjectList($areaCode, $projectCateId = null, $type = ProjectType::VISIT, $perPage = 10)
    {
        // 生成缓存键
        $cacheKey = "project:list:{$areaCode}:{$projectCateId}:{$type}:{$perPage}";

        return Cache::remember($cacheKey, 3600, function () use ($areaCode, $projectCateId, $type, $perPage) {

            // 获取并验证项目分类
            $projectCate = ProjectCate::find($projectCateId);
            abort_if(!$projectCate, 404, '项目分类不存在');
            abort_if($projectCate->state != ProjectStatus::OPEN->value(), 404, '项目分类状态异常');

            // 查找区域代理商
            $agent = $this->findAvailableAgent($areaCode);

            // 获取项目列表
            return $this->getProjects($projectCate, $type, $agent, $perPage);
        });
    }

    /**
     * 如果代理商存在，则返回代理商项目，否则返回系统项目
     *
     * @param  int  $projectId  项目ID
     * @param  string  $areaCode  区域代码
     * @return Project 项目模型
     *
     * @throws \Illuminate\Http\Exceptions\HttpResponseException 项目不存在时抛出404异常
     */
    public function getProjectDetail($projectId, $areaCode)
    {
        // 查询系统项目
        $project = $this->getSystemProject($projectId);

        // 根据区域代码获取代理商
        $agent = $this->findAvailableAgent($areaCode);
        if ($agent) {
            $this->mergeAgentSettings($project, $agent);
            $project->agent_id = $agent->id;
        }

        return $project;
    }

    /**
     * 获取系统项目
     *
     * @param  int  $projectId  项目ID
     * @return Project
     * @throws \Illuminate\Http\Exceptions\HttpResponseException
     */
    private function getSystemProject($projectId)
    {
        $project = Project::where('state', ProjectStatus::OPEN->value())->find($projectId);
        abort_if(!$project, 404, '项目不存在');
        return $project;
    }

    /**
     * 获取技师开通的项目列表
     */
    public function getCoachProjectList($coachId, $areaCode, $projectCateId)
    {
        // 查询技师信息
        $coach = CoachUser::where('id', $coachId)
            ->where('state', TechnicianStatus::ACTIVE->value)
            ->with(['info', 'qual', 'real'])
            ->first();

        abort_if(! $coach, 404, '技师不存在');
        abort_if(! $coach->info, 404, '技师信息不存在');
        abort_if($coach->info->state !== TechnicianAuthStatus::PASSED->value, 404, '技师未通过审核');
        abort_if(! $coach->qual, 404, '技师资格证书不存在');
        abort_if($coach->qual->state !== TechnicianAuthStatus::PASSED->value, 404, '技师资格证书未通过审核');
        abort_if(! $coach->real, 404, '技师实名认证记录不存在');
        abort_if($coach->real->state !== TechnicianAuthStatus::PASSED->value, 404, '技师实名认证未通过审核');

        // 获取技师开通的项目ID列表
        $projectIds = $coach->projects()
            ->where('state', ProjectStatus::OPEN->value)
            ->pluck('project_id');

        // 根据区域代码获取代理商
        $agent = $this->findAvailableAgent($areaCode);

        if ($agent) {
            $agentCate = $agent->cates()
                ->where('project_cate_id', $projectCateId)
                ->first();

            $projectIds = $agentCate->projects()
                ->whereIn('project_id', $projectIds)
                ->pluck('project_id');
        }

        return $coach->projects()
            ->with('basicInfo')
            ->whereIn('project_id', $projectIds)
            ->get();
    }

    /**
     * 获取项目列表
     * 根据条件获取系统项目或代理商项目
     *
     * @param ProjectCate $projectCate 项目分类
     * @param int $type 项目类型
     * @param Agent|null $agent 代理商(可选)
     * @param int $perPage 每页数量
     * @return mixed
     */
    private function getProjects(ProjectCate $projectCate, int $type, $agent = null, int $perPage = 10)
    {
        // 构建基础查询
        $query = $projectCate->projects()
            ->where('state', ProjectStatus::OPEN->value());

        // 处理项目类型查询
        if ($type == ProjectType::OVERTIME->value()) {
            $query->whereIn('type', [
                ProjectType::VISIT->value(),
                ProjectType::OVERTIME->value()
            ]);
        } else {
            $query->where('type', ProjectType::VISIT->value());
        }

        // 如果有代理商，处理代理商项目设置
        if ($agent) {
            $agentCate = $agent->cates()
                ->where('project_cate_id', $projectCate->id)
                ->first();

            // 验证代理商分类状态
            abort_if(
                $agentCate && ($agentCate->state != ProjectStatus::OPEN->value()),
                404,
                '当前区域未开通服务'
            );

            // 获取分页数据
            $projects = $query->paginate($perPage);

            // 处理代理商设置
            foreach ($projects as $project) {
                $this->mergeAgentSettings($project, $agent);
            }

            return $projects;
        }

        // 返回系统默认项目
        return $query->paginate($perPage);
    }

    /**
     * 递归查找可用的代理商
     * 从6位区域代码开始，每次去掉最后2位，直到找到代理商或只剩2位
     * 查找规则：
     * 1. 先查找精确匹配的区域代码
     * 2. 如果找不到，则去掉最后2位，查找上级区域
     * 3. 重复步骤2直到只剩2位区域代码
     * 4. 如果全部未找到则返回null
     *
     * @param string $areaCode 区域代码(2-6位数字)
     * @return Agent|null 返回找到的代理商或null
     * @throws \Exception 当查询过程中发生错误时抛出异常
     */
    private function findAvailableAgent($areaCode)
    {
        // 生成缓存键
        $cacheKey = "agent:area:{$areaCode}";

        return Cache::remember($cacheKey, 3600, function () use ($areaCode) {
            // 现有的查找逻辑
            $fullAreaCode = str_pad($areaCode, 6, '0', STR_PAD_RIGHT);

            $agent = AgentInfo::where('area_code', $fullAreaCode)
                ->where('state', AgentStatus::ENABLE->value)
                ->where('audit_state', AgentAuditStatus::PASSED->value)
                ->first();

            if ($agent) {
                return $agent;
            }

            if (strlen($areaCode) > 2) {
                $parentAreaCode = substr($areaCode, 0, -2);
                return $this->findAvailableAgent($parentAreaCode);
            }

            return null;
        });
    }

    /**
     * 合并代理商项目设置
     * 将代理商的自定义设置覆盖到项目默认设置中
     *
     * @param Project $project 项目对象
     * @param Agent $agent 代理商对象
     */
    private function mergeAgentSettings(&$project, $agent)
    {
        // 查找代理商对该项目的设置
        $agentProject = $agent->projects()
            ->where('project_id', $project->id)
            ->first();

        // 如果有设置则覆盖默认值
        if ($agentProject) {
            $project->price = $agentProject->price ?? $project->price;
            $project->duration = $agentProject->duration ?? $project->duration;
            $project->distance = $agentProject->distance ?? $project->distance;
        }
    }
}