<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Models\Course;
use App\Models\CourseSignup;
use App\Models\CourseSignupCheckin;
use App\Support\ApiResponse;
use App\Support\CourseCheckinDaySync;
use App\Support\SignupFormAnswers;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class CourseSignupController extends Controller
{
    use ApiResponse;

    public function index(Request $request, int $course): JsonResponse
    {
        Course::query()->findOrFail($course);
        $checkinDate = $request->query('checkin_date');
        $checkinStatus = $request->query('checkin_status');

        $query = CourseSignup::query()->where('course_id', $course)->orderByDesc('id');

        if ($kw = $request->query('keyword')) {
            $query->where(function ($q) use ($kw) {
                $q->where('name', 'like', "%{$kw}%")
                    ->orWhere('mobile', 'like', "%{$kw}%")
                    ->orWhere('company', 'like', "%{$kw}%");
            });
        }

        if ($checkinDate) {
            if ((string) $checkinStatus === '1') {
                $query->whereHas('checkins', function ($q) use ($checkinDate) {
                    $q->whereDate('checkin_date', $checkinDate)->whereNotNull('checked_in_at');
                });
            } elseif ((string) $checkinStatus === '0') {
                $query->whereDoesntHave('checkins', function ($q) use ($checkinDate) {
                    $q->whereDate('checkin_date', $checkinDate)->whereNotNull('checked_in_at');
                });
            }
        }

        $paginator = $query
            ->with(['checkins' => function ($q) use ($checkinDate) {
                if ($checkinDate) {
                    $q->whereDate('checkin_date', $checkinDate);
                }
            }])
            ->paginate((int) $request->query('page_size', 20))
            ->withQueryString();

        $paginator->getCollection()->transform(
            fn (CourseSignup $r) => $this->serialize($r, is_string($checkinDate) ? $checkinDate : null)
        );

        return $this->paginated($paginator);
    }

    public function store(Request $request, int $course): JsonResponse
    {
        $courseModel = Course::query()->findOrFail($course);
        $data = $request->validate([
            'name' => ['required', 'string', 'max:64'],
            'mobile' => ['required', 'string', 'max:32'],
            'company' => ['nullable', 'string', 'max:128'],
            'form_answers' => ['nullable', 'array'],
        ]);

        $formAnswers = null;
        if (isset($data['form_answers']) && is_array($data['form_answers'])) {
            $formAnswers = SignupFormAnswers::normalize(
                $data['form_answers'],
                is_array($courseModel->signup_form_schema) ? $courseModel->signup_form_schema : null
            );
        }

        $signup = CourseSignup::query()->create([
            'course_id' => $course,
            'name' => $data['name'],
            'mobile' => $data['mobile'],
            'company' => $data['company'] ?? null,
            'form_answers' => $formAnswers,
            'signed_up_at' => now(),
            'status' => 1,
        ]);

        return $this->ok(['id' => $signup->id], '报名已登记');
    }

    public function destroy(int $course, int $signup): JsonResponse
    {
        $model = CourseSignup::query()->where('course_id', $course)->findOrFail($signup);
        $model->delete();

        return $this->ok(null, '已删除');
    }

    public function checkin(Request $request, int $course, int $signup): JsonResponse
    {
        $courseModel = Course::query()->findOrFail($course);
        $model = CourseSignup::query()->where('course_id', $course)->findOrFail($signup);

        $data = $request->validate([
            'checkin_date' => ['required', 'date'],
        ]);

        $checkinDate = $data['checkin_date'];
        if (! CourseCheckinDaySync::isTeachDate($courseModel, $checkinDate)) {
            return $this->fail('该日期不在课程开课范围内', 422);
        }

        CourseSignupCheckin::query()->updateOrCreate(
            [
                'course_signup_id' => $model->id,
                'checkin_date' => $checkinDate,
            ],
            ['checked_in_at' => now()]
        );

        return $this->ok(null, '签到成功');
    }

    /**
     * @return array<string, mixed>
     */
    protected function serialize(CourseSignup $r, ?string $checkinDate = null): array
    {
        $dayCheckedInAt = null;
        if ($checkinDate) {
            $checkin = $r->relationLoaded('checkins')
                ? $r->checkins->first()
                : $r->checkins()->whereDate('checkin_date', $checkinDate)->first();
            $dayCheckedInAt = $checkin?->checked_in_at;
        }

        return [
            'id' => $r->id,
            'course_id' => $r->course_id,
            'name' => $r->name,
            'mobile' => $r->mobile,
            'company' => $r->company,
            'form_answers' => $r->form_answers,
            'signed_up_at' => $r->signed_up_at?->toIso8601String(),
            'status' => (int) $r->status,
            'checkin_date' => $checkinDate,
            'day_checked_in_at' => $dayCheckedInAt?->toIso8601String(),
        ];
    }
}