<?php

namespace App\Http\Controllers\Api\Admin;

use App\Http\Controllers\Controller;
use App\Http\Requests\Admin\StoreCompetitionTrackRequest;
use App\Http\Requests\Admin\UpdateCompetitionTrackRequest;
use App\Models\Competition;
use App\Models\CompetitionTrack;
use App\Support\TrackScoringSheet;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Response;
use Illuminate\Validation\ValidationException;

class CompetitionTrackController extends Controller
{
    public function index(Competition $competition): JsonResponse
    {
        $tracks = $competition->tracks()->orderBy('sort')->orderBy('id')->get()->map(fn (CompetitionTrack $t) => $this->toArray($t));

        return response()->json([
            'data' => $tracks,
        ]);
    }

    public function store(StoreCompetitionTrackRequest $request, Competition $competition): JsonResponse
    {
        /** @var array<string, mixed> $validated */
        $validated = $request->validated();
        $validated = $this->normalizeScoringSheetInPayload($validated);

        /** @var CompetitionTrack $track */
        $track = $competition->tracks()->create($validated);

        return response()->json($this->toArray($track), 201);
    }

    public function show(Competition $competition, CompetitionTrack $track): JsonResponse
    {
        return response()->json($this->ensureTrackBelongsAndReturn($competition, $track));
    }

    public function update(UpdateCompetitionTrackRequest $request, Competition $competition, CompetitionTrack $track): JsonResponse
    {
        $this->ensureTrackBelongs($competition, $track);

        /** @var array<string, mixed> $validated */
        $validated = $request->validated();
        $validated = $this->normalizeScoringSheetInPayload($validated);

        $track->fill($validated);
        $track->save();

        return response()->json($this->toArray($track));
    }

    public function destroy(Competition $competition, CompetitionTrack $track): Response
    {
        $this->ensureTrackBelongs($competition, $track);
        $track->delete();

        return response()->noContent();
    }

    /**
     * @param  array<string, mixed>  $validated
     * @return array<string, mixed>
     */
    private function normalizeScoringSheetInPayload(array $validated): array
    {
        if (! array_key_exists('scoring_sheet_json', $validated)) {
            return $validated;
        }

        $raw = $validated['scoring_sheet_json'];
        if ($raw === null) {
            $validated['scoring_sheet_json'] = null;

            return $validated;
        }

        $parsed = TrackScoringSheet::parseAndValidateConfig($raw);
        if ($parsed['ok'] !== true) {
            throw ValidationException::withMessages([
                'scoring_sheet_json' => [$parsed['message']],
            ]);
        }

        $validated['scoring_sheet_json'] = $parsed['sheet'];

        return $validated;
    }

    /**
     * @return array<string, mixed>
     */
    private function toArray(CompetitionTrack $track): array
    {
        $sheet = is_array($track->scoring_sheet_json) ? $track->scoring_sheet_json : null;
        $configured = TrackScoringSheet::isConfigured($sheet);

        return [
            'id' => $track->id,
            'competition_id' => $track->competition_id,
            'track_code' => $track->track_code,
            'title' => $track->title,
            'description' => $track->description,
            'sort' => $track->sort,
            'is_enabled' => $track->is_enabled,
            'scoring_sheet_json' => $sheet,
            'scoring_sheet_configured' => $configured,
            'created_at' => $track->created_at?->toIso8601String(),
            'updated_at' => $track->updated_at?->toIso8601String(),
        ];
    }

    /**
     * @return array<string, mixed>
     */
    private function ensureTrackBelongsAndReturn(Competition $competition, CompetitionTrack $track): array
    {
        $this->ensureTrackBelongs($competition, $track);

        return $this->toArray($track);
    }

    private function ensureTrackBelongs(Competition $competition, CompetitionTrack $track): void
    {
        if ($track->competition_id !== $competition->id) {
            abort(404);
        }
    }
}