<?php

use App\Models\Ingredient;
use App\Models\Location;
use App\Models\PackagingItem;
use App\Models\PackagingMaterial;
use App\Models\Product;
use App\Models\ProductIngredient;
use App\Models\Production;
use App\Models\StockEntry;
use App\Models\Supplier;
use App\Services\ProductionService;
use App\User;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

uses(TestCase::class, RefreshDatabase::class);

/**
 * AP-35: Rezeptur ist in Prozent; die Sollmenge skaliert auf das Füllgewicht.
 * AP-39: Abwiegen darf ±5 % vom Soll abweichen (realer Ist-Wert wird gebucht).
 * Helfer sind mit ps* präfixiert, um Kollisionen mit anderen Testdateien zu meiden.
 */
function psUser(): User
{
    $user = User::query()->create([
        'email' => uniqid('ps_', true).'@test.example',
        'password' => bcrypt('password'),
    ]);
    $user->forceFill(['admin' => 7, 'confirmed' => true, 'active' => true, 'wizard' => 100, 'blocked' => false])->save();

    return $user->fresh();
}

function psIngredient(string $name): Ingredient
{
    return Ingredient::query()->create([
        'name' => $name, 'trans_name' => '', 'inci' => $name, 'trans_inci' => '',
        'effect' => '', 'trans_effect' => '', 'active' => true, 'pos' => 0,
    ]);
}

/**
 * @param  array<string, mixed>  $attrs
 */
function psProduct(array $attrs, Ingredient $ing, float $gram = 100, float $factor = 1.0): Product
{
    $product = Product::query()->create(array_merge(['name' => uniqid('PS-', true), 'title' => 'PS', 'active' => true], $attrs));
    ProductIngredient::create([
        'product_id' => $product->id, 'ingredient_id' => $ing->id,
        'pos' => 0, 'gram' => $gram, 'factor' => $factor, 'recipe_type' => 'manufacturer',
    ]);

    return $product->fresh('manufacturer_ingredients');
}

test('AP-35: 100%-rezeptur skaliert auf die füllmenge eines ml-produkts', function () {
    $ing = psIngredient('PS-Sheabutter');
    // 50 ml (unit=1) => 50 g Basis, 100 % Anteil, Faktor 1 => 50 g je Stück.
    $product = psProduct(['contents_total' => 50, 'unit' => 1], $ing);

    $required = app(ProductionService::class)->requiredGramsByIngredient($product, 1);
    expect($required[$ing->id])->toBe(50.0);

    // 3 Stück => 150 g
    $required3 = app(ProductionService::class)->requiredGramsByIngredient($product, 3);
    expect($required3[$ing->id])->toBe(150.0);
});

test('AP-35: explizites füllgewicht hat vorrang vor der ml-menge', function () {
    $ing = psIngredient('PS-Balm');
    // 50 ml aber real 60 g Füllgewicht (dichter als Wasser) => 60 g Basis.
    $product = psProduct(['contents_total' => 50, 'unit' => 1, 'fill_weight' => 60], $ing);

    $required = app(ProductionService::class)->requiredGramsByIngredient($product, 1);
    expect($required[$ing->id])->toBe(60.0);
});

test('AP-35: ohne massenbasis (stück-produkt) gilt das altverhalten anteil=gramm', function () {
    $ing = psIngredient('PS-Kapsel');
    // unit=2 (Stück) ohne fill_weight => keine Massenbasis => Faktor 1,0.
    $product = psProduct(['contents_total' => 54, 'unit' => 2], $ing, gram: 30, factor: 1.0);

    $required = app(ProductionService::class)->requiredGramsByIngredient($product, 2);
    expect($required[$ing->id])->toBe(60.0); // 30 × 1 × 2 (unskaliert)
});

test('AP-39: abwiegen darf bis 5 % vom soll abweichen und wird gebucht', function () {
    $user = psUser();
    $this->actingAs($user, 'user');
    $ing = psIngredient('PS-Tol');
    $location = Location::factory()->create();
    $supplier = Supplier::factory()->create();
    StockEntry::query()->create([
        'entry_type' => 'ingredient', 'ingredient_id' => $ing->id, 'supplier_id' => $supplier->id,
        'location_id' => $location->id, 'unit' => 'gram', 'ordered_by' => $user->id, 'ordered_at' => '2026-01-01',
        'ordered_quantity' => 1000, 'status' => 'received', 'received_by' => $user->id, 'received_at' => '2026-01-15',
        'received_quantity' => 1000, 'batch_number' => 'PS-B1', 'best_before' => '2030-12-31',
    ]);
    // 100 ml, 100 % => Soll 100 g je Stück.
    $product = psProduct(['contents_total' => 100, 'unit' => 1], $ing);

    $stockId = StockEntry::query()->where('ingredient_id', $ing->id)->value('id');

    // Ist 103 g (±3 %) => darf gespeichert werden, realer Wert wird gebucht.
    $this->post(route('admin.inventory.productions.store'), [
        'product_id' => $product->id, 'location_id' => $location->id, 'produced_at' => '2026-08-01', 'quantity' => 1,
        'ingredient_lines' => [['ingredient_id' => $ing->id, 'stock_entry_id' => $stockId, 'quantity_used' => '103']],
        'outputs' => [['product_id' => $product->id, 'quantity' => 1, 'batch_number' => null]],
    ])->assertSessionHasNoErrors();

    expect(Production::query()->count())->toBe(1)
        ->and((float) Production::query()->first()->productionIngredients()->sum('quantity_used'))->toBe(103.0);
});

test('AP-39: abweichung über 5 % wird abgelehnt (zahlendreher-schutz)', function () {
    $user = psUser();
    $this->actingAs($user, 'user');
    $ing = psIngredient('PS-TolBad');
    $location = Location::factory()->create();
    $supplier = Supplier::factory()->create();
    StockEntry::query()->create([
        'entry_type' => 'ingredient', 'ingredient_id' => $ing->id, 'supplier_id' => $supplier->id,
        'location_id' => $location->id, 'unit' => 'gram', 'ordered_by' => $user->id, 'ordered_at' => '2026-01-01',
        'ordered_quantity' => 1000, 'status' => 'received', 'received_by' => $user->id, 'received_at' => '2026-01-15',
        'received_quantity' => 1000, 'batch_number' => 'PS-B2', 'best_before' => '2030-12-31',
    ]);
    $product = psProduct(['contents_total' => 100, 'unit' => 1], $ing);
    $stockId = StockEntry::query()->where('ingredient_id', $ing->id)->value('id');

    // Ist 120 g (+20 %) => Ablehnung, keine Produktion.
    $this->post(route('admin.inventory.productions.store'), [
        'product_id' => $product->id, 'location_id' => $location->id, 'produced_at' => '2026-08-01', 'quantity' => 1,
        'ingredient_lines' => [['ingredient_id' => $ing->id, 'stock_entry_id' => $stockId, 'quantity_used' => '120']],
        'outputs' => [['product_id' => $product->id, 'quantity' => 1, 'batch_number' => null]],
    ])->assertSessionHasErrors('ingredient_lines');

    expect(Production::query()->count())->toBe(0);
});

test('AP-40: recipeJson-payload enthält aktuellen bestand je INCI (für differenz)', function () {
    $user = psUser();
    $ing = psIngredient('PS-Bestand');
    $location = Location::factory()->create();
    $supplier = Supplier::factory()->create();
    StockEntry::query()->create([
        'entry_type' => 'ingredient', 'ingredient_id' => $ing->id, 'supplier_id' => $supplier->id,
        'location_id' => $location->id, 'unit' => 'gram', 'ordered_by' => $user->id, 'ordered_at' => '2026-01-01',
        'ordered_quantity' => 800, 'status' => 'received', 'received_by' => $user->id, 'received_at' => '2026-01-15',
        'received_quantity' => 800, 'batch_number' => 'PS-BST', 'best_before' => '2030-12-31',
    ]);
    // 100 ml, 100 % => Soll 100 g/Stück; 10 Stück => 1000 g Bedarf, Bestand 800 g => Differenz -200 g.
    $product = psProduct(['contents_total' => 100, 'unit' => 1], $ing);

    $payload = app(ProductionService::class)->buildRecipePayload($product, $location->id, 10);
    $line = collect($payload['ingredients'])->firstWhere('id', $ing->id);

    expect($line['current_stock'])->toBe(800.0)
        ->and($line['required_grams_total'])->toBe(1000.0);
});

test('AP-45: verpackung wird je ergebnisprodukt aus dem produktionsergebnis gebucht', function () {
    $user = psUser();
    $supplier = Supplier::factory()->create();
    $location = Location::factory()->create();
    $material = PackagingMaterial::factory()->create();

    $pkA = PackagingItem::factory()->create(['packaging_material_id' => $material->id, 'supplier_id' => $supplier->id, 'name' => 'PS-Tiegel-A', 'category' => 'packaging']);
    $pkB = PackagingItem::factory()->create(['packaging_material_id' => $material->id, 'supplier_id' => $supplier->id, 'name' => 'PS-Tiegel-B', 'category' => 'packaging']);

    // Beide Ergebnisprodukte ohne Rezepturpflicht (kein Rohstoff-Abwiegen nötig).
    $planned = Product::query()->create(['name' => uniqid('PS-Plan-', true), 'title' => 'x', 'active' => true, 'no_recipe_required' => true]);
    $planned->packagings()->sync([$pkA->id => ['quantity' => 1, 'pos' => 0]]);
    $other = Product::query()->create(['name' => uniqid('PS-Other-', true), 'title' => 'y', 'active' => true, 'no_recipe_required' => true]);
    $other->packagings()->sync([$pkB->id => ['quantity' => 2, 'pos' => 0]]);

    // Eine Charge, Ergebnis: 40× Plan (Tiegel A) + 50× Other (Tiegel B).
    $production = app(ProductionService::class)->store([
        'product_id' => $planned->id, 'location_id' => $location->id, 'produced_at' => '2026-08-01', 'quantity' => 40,
    ], [], $user->id, [
        ['product_id' => $planned->id, 'quantity' => 40, 'batch_number' => 'PS-A1'],
        ['product_id' => $other->id, 'quantity' => 50, 'batch_number' => 'PS-B1'],
    ]);

    $byItem = $production->productionPackagings->keyBy('packaging_item_id');
    expect($byItem[$pkA->id]->quantity_used)->toBe(40)     // 1 × 40 (Ergebnis Plan)
        ->and($byItem[$pkB->id]->quantity_used)->toBe(100); // 2 × 50 (Ergebnis Other)
});

test('F-05: notizkorrektur behält den historischen verpackungs-snapshot, mengenkorrektur bildet ihn neu', function () {
    $user = psUser();
    $supplier = Supplier::factory()->create();
    $location = Location::factory()->create();
    $material = PackagingMaterial::factory()->create();
    $pk = PackagingItem::factory()->create(['packaging_material_id' => $material->id, 'supplier_id' => $supplier->id, 'name' => 'PS-F05-Tiegel', 'category' => 'packaging']);

    $product = Product::query()->create(['name' => uniqid('PS-F05-', true), 'title' => 'x', 'active' => true, 'no_recipe_required' => true]);
    $product->packagings()->sync([$pk->id => ['quantity' => 1, 'pos' => 0]]);

    $service = app(ProductionService::class);
    $head = ['product_id' => $product->id, 'location_id' => $location->id, 'produced_at' => '2026-08-01', 'quantity' => 1];
    $production = $service->store($head, [], $user->id, [['product_id' => $product->id, 'quantity' => 1, 'batch_number' => 'F05']]);
    expect($production->productionPackagings->sum('quantity_used'))->toBe(1);

    // Stückliste nachträglich auf 2 Tiegel je Stück ändern.
    $product->packagings()->sync([$pk->id => ['quantity' => 2, 'pos' => 0]]);

    // Nur die Notiz korrigieren: Snapshot bleibt bei 1.
    $production = $service->updateProduction($production->fresh(), $head + ['notes' => 'Korrektur'], [], $user->id,
        [['product_id' => $product->id, 'quantity' => 1, 'batch_number' => 'F05']]);
    expect($production->productionPackagings->sum('quantity_used'))->toBe(1)
        ->and($production->notes)->toBe('Korrektur');

    // Echte Mengenkorrektur (1 → 3 Stück): Snapshot wird mit der aktuellen Stückliste neu gebildet (2 × 3).
    $production = $service->updateProduction($production->fresh(), $head + ['quantity' => 3], [], $user->id,
        [['product_id' => $product->id, 'quantity' => 3, 'batch_number' => 'F05']]);
    expect($production->productionPackagings->sum('quantity_used'))->toBe(6);
});

test('AP-47: produktions-auswahl zeigt nur produktionsrelevante produkte', function () {
    $user = psUser();
    $this->actingAs($user, 'user');
    $ing = psIngredient('PS-Rel');
    psProduct(['name' => 'PS47-Sichtbar', 'no_recipe_required' => true, 'production_relevant' => true], $ing);
    psProduct(['name' => 'PS47-Versteckt', 'no_recipe_required' => true, 'production_relevant' => false], $ing);

    $html = $this->get(route('admin.inventory.productions.create'))
        ->assertSuccessful()
        ->assertSee('PS47-Sichtbar')
        ->getContent();

    // Planung oben: nur produktionsrelevante Produkte.
    expect(psSelectHtml($html, 'id="product_id"'))->toContain('PS47-Sichtbar')->not->toContain('PS47-Versteckt')
        // F-02: Ergebniszeilen: auch nicht-produktionsrelevante Produkte (5 ml aus der 50-ml-Masse).
        ->and(psSelectHtml($html, 'class="form-control form-control-sm output-product"'))->toContain('PS47-Sichtbar')->toContain('PS47-Versteckt');
});

test('F-02: bearbeiten behält ein nicht mehr produktionsrelevantes ergebnisprodukt und speichert unverändert', function () {
    $user = psUser();
    $this->actingAs($user, 'user');
    $ing = psIngredient('PS-F02');
    $big = psProduct(['name' => 'PS-F02-50ml', 'no_recipe_required' => true, 'production_relevant' => true], $ing);
    $small = psProduct(['name' => 'PS-F02-5ml', 'no_recipe_required' => true, 'production_relevant' => false], $ing);
    $location = Location::factory()->create();

    $production = app(ProductionService::class)->store(
        ['product_id' => $big->id, 'location_id' => $location->id, 'produced_at' => '2026-09-01', 'quantity' => 50, 'notes' => null],
        [],
        $user->id,
        [
            ['product_id' => $big->id, 'quantity' => 40, 'batch_number' => 'B-50'],
            ['product_id' => $small->id, 'quantity' => 50, 'batch_number' => 'B-5'],
        ]
    );

    $html = $this->get(route('admin.inventory.productions.edit', $production))->assertSuccessful()->getContent();
    expect(psSelectHtml($html, 'id="product_id"'))->not->toContain('PS-F02-5ml')
        ->and(psSelectHtml($html, 'class="form-control form-control-sm output-product"'))->toContain('PS-F02-5ml');

    $this->put(route('admin.inventory.productions.update', $production), [
        'product_id' => $big->id, 'location_id' => $location->id, 'produced_at' => '2026-09-01', 'quantity' => 50,
        'outputs' => [
            ['product_id' => $big->id, 'quantity' => 40, 'batch_number' => 'B-50'],
            ['product_id' => $small->id, 'quantity' => 50, 'batch_number' => 'B-5'],
        ],
    ])->assertSessionHasNoErrors();

    expect($production->fresh()->outputs()->where('product_id', $small->id)->value('quantity'))->toBe(50);
});

/**
 * Liefert das HTML eines <select>, identifiziert über ein eindeutiges Attribut im Start-Tag.
 */
function psSelectHtml(string $html, string $attribute): string
{
    $start = strpos($html, $attribute);
    expect($start)->not->toBeFalse();
    $end = strpos($html, '</select>', $start);

    return substr($html, $start, $end - $start);
}

test('AP-47: enthalten-in blendet nicht-produktionsrelevante produkte aus', function () {
    $user = psUser();
    $this->actingAs($user, 'user');
    $ing = psIngredient('PS-EnthaltenRel');
    psProduct(['name' => 'PS47-EnthaltenSichtbar', 'production_relevant' => true], $ing);
    psProduct(['name' => 'PS47-EnthaltenVersteckt', 'production_relevant' => false], $ing);

    $this->get(route('admin.inventory.raw-material-stock.show', $ing))
        ->assertSuccessful()
        ->assertSee('PS47-EnthaltenSichtbar')
        ->assertDontSee('PS47-EnthaltenVersteckt');
});