<?php

namespace App\Http\Controllers\Api\Admin;

use App\Http\Controllers\Controller;
use App\Http\Requests\Admin\StoreCompetitionRequest;
use App\Http\Requests\Admin\UpdateCompetitionRequest;
use App\Models\Competition;
use App\Models\FormSchemaDefinition;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class CompetitionController extends Controller
{
    public function index(Request $request): JsonResponse
    {
        $perPage = min((int) $request->query('per_page', 15), 100);

        $paginator = Competition::query()
            ->orderByDesc('id')
            ->paginate($perPage);

        $paginator->getCollection()->transform(fn (Competition $c) => $this->toSummary($c));

        return response()->json($paginator);
    }

    public function store(StoreCompetitionRequest $request): JsonResponse
    {
        $competition = Competition::query()->create($request->validated());

        return response()->json($this->toDetail($competition), 201);
    }

    public function show(Competition $competition): JsonResponse
    {
        return response()->json($this->toDetail($competition->loadMissing([
            'tracks',
            'formSchema',
            'reviewFormSchema',
        ])));
    }

    public function update(UpdateCompetitionRequest $request, Competition $competition): JsonResponse
    {
        $competition->fill($request->validated());
        $competition->save();

        return response()->json($this->toDetail($competition->loadMissing([
            'tracks',
            'formSchema',
            'reviewFormSchema',
        ])));
    }

    public function destroy(Competition $competition): JsonResponse
    {
        $competition->delete();

        return response()->noContent();
    }

    /**
     * @return array<string, mixed>
     */
    private function toSummary(Competition $c): array
    {
        return [
            'id' => $c->id,
            'slug' => $c->slug,
            'name' => $c->name,
            'status' => $c->status,
            'published' => $c->published,
            'signup_open_at' => $c->signup_open_at?->toIso8601String(),
            'signup_close_at' => $c->signup_close_at?->toIso8601String(),
            'form_schema_id' => $c->form_schema_id,
            'review_form_schema_id' => $c->review_form_schema_id,
            'created_at' => $c->created_at?->toIso8601String(),
            'updated_at' => $c->updated_at?->toIso8601String(),
        ];
    }

    /**
     * @return array<string, mixed>
     */
    private function toDetail(Competition $c): array
    {
        $base = $this->toSummary($c);

        $base['description'] = $c->description;
        $base['pledge_content_html'] = $c->pledge_content_html;
        $base['branding_json'] = $c->branding_json;
        $base['settings'] = $c->settings;
        $base['scoring_rules_json'] = $c->scoring_rules_json;

        if ($c->relationLoaded('tracks')) {
            $base['tracks'] = $c->tracks->map(fn ($t) => [
                'id' => $t->id,
                'track_code' => $t->track_code,
                'title' => $t->title,
                'description' => $t->description,
                'sort' => $t->sort,
                'is_enabled' => $t->is_enabled,
            ])->values();
        }

        if ($c->relationLoaded('formSchema') && $c->formSchema) {
            $base['form_schema'] = $this->formSchemaBrief($c->formSchema);
        }
        if ($c->relationLoaded('reviewFormSchema') && $c->reviewFormSchema) {
            $base['review_form_schema'] = $this->formSchemaBrief($c->reviewFormSchema);
        }

        return $base;
    }

    /**
     * @return array<string, mixed>
     */
    private function formSchemaBrief(FormSchemaDefinition $schema): array
    {
        return [
            'id' => $schema->id,
            'name' => $schema->name,
            'purpose' => $schema->purpose,
            'version' => $schema->version,
            'is_published' => $schema->is_published,
        ];
    }
}