<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\GrapeVariety;
use App\Models\VarietyVariation;
use Illuminate\Http\Request;
use Illuminate\Support\Str;
use Illuminate\Validation\Rule;

class VarietyController extends Controller
{
    public function searchVariations(Request $request)
    {
        $query = $request->string('q')->toString();

        $variations = VarietyVariation::with('grapeVariety')
            ->when($query !== '', function ($builder) use ($query) {
                $builder->where(function ($inner) use ($query) {
                    $inner->whereHas('grapeVariety', function ($sub) use ($query) {
                        $sub->where('variety_name', 'like', '%' . $query . '%');
                    })->orWhere('color', 'like', '%' . $query . '%');
                });
            })
            ->orderBy('grape_variety_id')
            ->orderBy('color')
            ->limit(15)
            ->get()
            ->map(fn (VarietyVariation $variation) => $this->formatVariation($variation));

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

    public function createIfMissing(Request $request)
    {
        $validated = $request->validate([
            'grape_variety_id' => ['nullable', 'integer', 'exists:grape_varieties,id'],
            'grape_variety_name' => ['nullable', 'string', 'max:255'],
            'color' => ['required', 'string', 'max:50'],
            'description' => ['nullable', 'string'],
            'typical_sugar_content' => ['nullable', 'numeric', 'min:0'],
            'typical_alcohol' => ['nullable', 'numeric', 'min:0'],
            'ripening_period' => ['nullable', 'string', 'max:255'],
        ], [
            'grape_variety_id.required_without' => 'Provide an existing variety or a name for a new variety.',
            'grape_variety_name.required_without' => 'Provide an existing variety or a name for a new variety.',
        ]);

        $variety = null;

        if (! empty($validated['grape_variety_id'])) {
            $variety = GrapeVariety::find($validated['grape_variety_id']);
        }

        if (! $variety && ! empty($validated['grape_variety_name'])) {
            $variety = GrapeVariety::firstOrCreate([
                'variety_name' => $validated['grape_variety_name'],
            ]);
        }

        if (! $variety) {
            return response()->json([
                'message' => 'Unable to determine grape variety for variation creation.',
            ], 422);
        }

        $variation = VarietyVariation::firstOrCreate(
            [
                'grape_variety_id' => $variety->getKey(),
                'color' => $validated['color'],
            ],
            [
                'description' => $validated['description'] ?? null,
                'typical_sugar_content' => $validated['typical_sugar_content'] ?? null,
                'typical_alcohol' => $validated['typical_alcohol'] ?? null,
                'ripening_period' => $validated['ripening_period'] ?? null,
                'status' => 'active',
            ]
        );

        return response()->json([
            'created' => $variation->wasRecentlyCreated,
            'variation' => $this->formatVariation($variation->loadMissing('grapeVariety')),
        ], $variation->wasRecentlyCreated ? 201 : 200);
    }

    protected function formatVariation(VarietyVariation $variation): array
    {
        $grape = $variation->grapeVariety;

        return [
            'id' => $variation->getKey(),
            'label' => sprintf('%s — %s', $grape?->variety_name ?? 'Unknown', Str::title($variation->color)),
            'color' => $variation->color,
            'grape_variety' => $grape ? [
                'id' => $grape->getKey(),
                'name' => $grape->variety_name,
            ] : null,
        ];
    }
}