<?php

namespace App\Console\Commands;

use App\Models\BodyPart;
use App\Models\Equipment;
use App\Models\Exercise;
use App\Models\Muscle;
use App\Services\ExerciseDb\ApiService;
use Illuminate\Console\Command;
use Illuminate\Support\Str;

class FetchExerciseDbDataCommand extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'fetch:exercise';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Fetch all exercises from ExerciseDB API and store them locally.';

    private ApiService $apiService;

    public function __construct(ApiService $apiService)
    {
        $this->apiService = $apiService;

        parent::__construct();
    }

    /**
     * Execute the console command.
     */
    public function handle(): int
    {
        $page = 1;
        $stored = 0;
        $updated = 0;

        $this->info('Fetching exercises from ExerciseDB...');

        while (true) {
            $results = $this->apiService->fetch($page);

            $results = $results['data'];

            $count = count($results);
            if ($count === 0) {
                break;
            }

            [$s, $u] = $this->process($results);
            $stored += $s;
            $updated += $u;

            $this->info("Processed page {$page} with {$count} items.");

            if ($count < ApiService::PER_PAGE) {
                break;
            }

            $page++;
            sleep(5);
        }

        $this->info("Done. Created {$stored}, updated {$updated} exercises.");

        return self::SUCCESS;
    }

    /**
     * @param array<int, array<string, mixed>> $results
     * @return array{int,int} [created, updated]
     */
    private function process(array $results): array
    {
        $created = 0;
        $updated = 0;

        foreach ($results as $item) {
            $exerciseDbId = (string)($item['exerciseId'] ?? '');
            if ($exerciseDbId === '') {
                continue;
            }

            $name = (string)($item['name'] ?? '');
            $gifUrl = (string)($item['gifUrl'] ?? '');

            $instructions = $item['instructions'] ?? [];
            if (is_array($instructions)) {
                $instructionsText = implode("\n", array_filter(array_map('strval', $instructions)));
            } else {
                $instructionsText = (string)$instructions;
            }

            $slug = Str::slug($name) ?: $exerciseDbId;

            $values = [
                'name' => $name,
                'slug' => $slug,
                'gif_url' => $gifUrl,
                'instructions' => $instructionsText,
            ];

            $existing = Exercise::where('exercise_db_id', $exerciseDbId)->first();
            $exercise = Exercise::updateOrCreate(
                ['exercise_db_id' => $exerciseDbId],
                $values,
            );

            if ($existing) { $updated++; } else { $created++; }

            // Relations
            // Body part (string)
            $bodyPartVal = $item['bodyPart'] ?? null;
            $bodyPartIds = [];
            if ($bodyPartVal) {
                $bodyParts = is_array($bodyPartVal) ? $bodyPartVal : [$bodyPartVal];
                foreach ($bodyParts as $bp) {
                    $bpName = (string)$bp;
                    $bpSlug = Str::slug($bpName);
                    $bpModel = BodyPart::firstOrCreate(['slug' => $bpSlug], ['name' => $bpName]);
                    $bodyPartIds[] = $bpModel->id;
                }
            }
            if ($bodyPartIds) {
                $exercise->bodyParts()->sync($bodyPartIds);
            }

            // Target muscle (string)
            $targetVal = $item['target'] ?? null;
            $targetIds = [];
            if ($targetVal) {
                $targets = is_array($targetVal) ? $targetVal : [$targetVal];
                foreach ($targets as $tm) {
                    $mName = (string)$tm;
                    $mSlug = Str::slug($mName);
                    $mModel = Muscle::firstOrCreate(['slug' => $mSlug], ['name' => $mName]);
                    $targetIds[] = $mModel->id;
                }
            }
            if ($targetIds) {
                $exercise->targetMuscles()->sync($targetIds);
            }

            // Secondary muscles (array)
            $secVal = $item['secondaryMuscles'] ?? [];
            $secondaryIds = [];
            if (!is_array($secVal)) { $secVal = [$secVal]; }
            foreach ($secVal as $sm) {
                $smName = (string)$sm;
                if ($smName === '') { continue; }
                $smSlug = Str::slug($smName);
                $mModel = Muscle::firstOrCreate(['slug' => $smSlug], ['name' => $smName]);
                $secondaryIds[] = $mModel->id;
            }
            if ($secondaryIds) {
                $exercise->secondaryMuscles()->sync($secondaryIds);
            }

            // Equipment (string or array depending on source variant)
            $equipVal = $item['equipment'] ?? null;
            $equipmentIds = [];
            if ($equipVal) {
                $equipments = is_array($equipVal) ? $equipVal : [$equipVal];
                foreach ($equipments as $eq) {
                    $eqName = (string)$eq;
                    $eqSlug = Str::slug($eqName);
                    $eqModel = Equipment::firstOrCreate(['slug' => $eqSlug], ['name' => $eqName]);
                    $equipmentIds[] = $eqModel->id;
                }
            }
            if ($equipmentIds) {
                $exercise->equipments()->sync($equipmentIds);
            }
        }

        return [$created, $updated];
    }
}