<?php

namespace App\Services\Schools;

use App\Models\Schools\School;
use App\Services\BaseService;
use Illuminate\Pagination\LengthAwarePaginator;

/**
 * 学校服务类
 */
class SchoolService extends BaseService
{
    protected string $modelClass = School::class;

    /**
     * 获取学校列表
     */
    public function getList(array $params): LengthAwarePaginator
    {
        $query = School::query();

        // 搜索条件
        if (!empty($params['keyword'])) {
            $query->where(function ($q) use ($params) {
                $q->where('name', 'like', '%' . $params['keyword'] . '%')
                  ->orWhere('alias', 'like', '%' . $params['keyword'] . '%')
                  ->orWhere('code', 'like', '%' . $params['keyword'] . '%');
            });
        }

        // 状态筛选
        if (isset($params['status'])) {
            $query->where('status', $params['status']);
        }

        // 学校类型筛选
        if (isset($params['type'])) {
            $query->where('type', $params['type']);
        }

        // 省市区筛选
        if (!empty($params['province_id'])) {
            $query->where('province_id', $params['province_id']);
        }
        if (!empty($params['city_id'])) {
            $query->where('city_id', $params['city_id']);
        }
        if (!empty($params['district_id'])) {
            $query->where('district_id', $params['district_id']);
        }

        // 学段筛选
        if (!empty($params['grade_period'])) {
            $query->where('grade_period', $params['grade_period']);
        }

        // 排序
        $query->ordered();

        return $query->paginate($params['page_size'] ?? 15);
    }

    /**
     * 获取简单列表（用于下拉选择等）
     */
    public function getSimpleList(): array
    {
        return School::select('id', 'name', 'alias', 'code')
            ->active()
            ->ordered()
            ->get()
            ->toArray();
    }

    /**
     * 获取指定用户管理的学校列表
     */
    public function getUserSchools(int $userId): array
    {
        $schoolIds = \App\Models\User::find($userId)->getSchoolIds();

        return School::whereIn('id', $schoolIds)
            ->active()
            ->ordered()
            ->get()
            ->toArray();
    }

    /**
     * 获取学校的校区列表
     */
    public function getSchoolCampuses(int $schoolId): array
    {
        $school = School::findOrFail($schoolId);

        return $school->campuses()
            ->active()
            ->select('id', 'name', 'alias', 'code')
            ->get()
            ->toArray();
    }

    /**
     * 获取学校的班级列表
     */
    public function getSchoolClasses(int $schoolId, ?int $campusId = null): array
    {
        $school = School::findOrFail($schoolId);

        $query = $school->classes()->active();

        if ($campusId) {
            $query->where('campus_id', $campusId);
        }

        return $query->select('id', 'name', 'code', 'campus_id', 'grade_id', 'number')
            ->orderBy('grade_id', 'asc')
            ->orderBy('number', 'asc')
            ->get()
            ->toArray();
    }

    /**
     * 获取学校统计信息
     */
    public function getSchoolStats(int $schoolId): array
    {
        $school = School::findOrFail($schoolId);

        return [
            'campus_count' => $school->campuses()->active()->count(),
            'class_count' => $school->classes()->active()->count(),
            'student_count' => \App\Models\Students\StudentClass::where('school_id', $schoolId)->count(),
            'teacher_count' => \App\Models\Teachers\TeacherClass::where('school_id', $schoolId)->distinct('teacher_id')->count(),
        ];
    }

    /**
     * 创建前的特殊处理
     */
    protected function beforeCreate(array &$data): void
    {
        // 设置默认值
        $data['status'] = $data['status'] ?? 1;
        $data['show_order'] = $data['show_order'] ?? 999;
        $data['sno_automatic'] = $data['sno_automatic'] ?? 0;
        $data['max_sno'] = $data['max_sno'] ?? 2;
        $data['is_open_user_login'] = $data['is_open_user_login'] ?? 0;
    }

    /**
     * 更新前的特殊处理
     */
    protected function beforeUpdate(array &$data): void
    {
        // 移除不允许更新的字段
        unset($data['id']);
    }
}