<?php

namespace App\Http\Controllers\Api\Assignment;

use App\Http\Controllers\Controller;
use App\Http\Resources\Assignment\AssignmentOverviewResource;
use App\Http\Resources\Assignment\AssignmentSectionResource;
use App\Services\Assignment\AssignmentService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Validator;

class AssignmentApiController extends Controller
{
    public function __construct(
        protected AssignmentService $assignmentService
    ) {}

    public function index(Request $request): JsonResponse
    {
        $data = $this->assignmentService->getAssignmentsOverview(
            schoolYear: $request->query('school_year'),
            semester: $request->query('semester'),
        );

        return response()->json([
            'message' => 'Assignments retrieved successfully.',
            'data' => new AssignmentOverviewResource((object) $data),
        ]);
    }

    public function store(Request $request): JsonResponse
    {
        $validator = Validator::make($request->all(), [
            'student_id' => ['required', 'integer', 'exists:students,id'],
            'class_section_id' => ['required', 'integer', 'exists:classSection,class_section_id'],
            'semester' => ['required', 'string', 'max:50'],
            'school_year' => ['required', 'string', 'max:50'],
            'description' => ['nullable', 'string'],
        ]);

        if ($validator->fails()) {
            return response()->json([
                'message' => 'Validation failed.',
                'errors' => $validator->errors(),
            ], 422);
        }

        $assignment = $this->assignmentService->storeAssignment(
            data: $validator->validated(),
            updatedBy: $request->user()?->id
        );

        return response()->json([
            'message' => 'Assignment saved successfully.',
            'data' => $assignment,
        ], 201);
    }

    public function classAssignmentData(): JsonResponse
    {
        $data = $this->assignmentService->getClassAssignmentData();

        return response()->json([
            'message' => 'Class assignment data retrieved successfully.',
            'data' => [
                'classSections' => AssignmentSectionResource::collection(collect($data['classSections'])),
                'semester' => $data['semester'],
                'school_year' => $data['school_year'],
            ],
        ]);
    }
}