<?php

use App\Models\Ingredient;
use App\Models\Location;
use App\Models\Product;
use App\Models\ProductIngredient;
use App\Models\Production;
use App\Models\ProductStockMovement;
use App\Models\StockDisposal;
use App\Models\StockEntry;
use App\Models\Supplier;
use App\Models\TaxRate;
use App\Services\InventoryService;
use App\Services\ProductionService;
use App\Services\ProductStockService;
use App\User;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

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

function delUser(int $adminLevel = 7): User
{
    $user = User::query()->create([
        'email' => uniqid('del_', true).'@test.example',
        'password' => bcrypt('password'),
    ]);
    $user->forceFill([
        'admin' => $adminLevel,
        'confirmed' => true,
        'active' => true,
        'wizard' => 100,
        'blocked' => false,
    ])->save();

    return $user->fresh();
}

function delIngredient(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>  $overrides
 */
function delStock(Ingredient $ing, Location $location, Supplier $supplier, User $user, array $overrides = []): StockEntry
{
    return StockEntry::query()->create(array_merge([
        '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' => 'DEL-B1',
        'best_before' => '2030-12-31',
    ], $overrides));
}

function delSimpleProduct(string $name): Product
{
    return Product::query()->create([
        'name' => $name,
        'title' => $name,
        'active' => true,
        'no_recipe_required' => true,
    ]);
}

// --- Stammdaten (SettingCrudController) ---

test('verwendeter steuersatz kann nicht geloescht werden', function () {
    $this->actingAs(delUser(8), 'user');

    $taxRate = TaxRate::factory()->create();
    $user = delUser();
    $ing = delIngredient('Del-Tax-INCI');
    $location = Location::factory()->create();
    $supplier = Supplier::factory()->create();
    delStock($ing, $location, $supplier, $user, ['tax_rate_id' => $taxRate->id]);

    $this->delete(route('admin.inventory.tax-rates.destroy', $taxRate));

    expect(session('alert-error'))->toContain('Löschen nicht möglich');
    expect(TaxRate::query()->find($taxRate->id))->not->toBeNull();
});

test('unbenutzter steuersatz wird soft-geloescht', function () {
    $this->actingAs(delUser(8), 'user');

    $taxRate = TaxRate::factory()->create();

    $this->delete(route('admin.inventory.tax-rates.destroy', $taxRate));

    expect(TaxRate::query()->find($taxRate->id))->toBeNull();
    expect(TaxRate::withTrashed()->find($taxRate->id))->not->toBeNull();
});

test('lagerort mit wareneingang kann nicht geloescht werden (kein 500)', function () {
    $this->actingAs(delUser(8), 'user');

    $user = delUser();
    $ing = delIngredient('Del-Loc-INCI');
    $location = Location::factory()->create();
    $supplier = Supplier::factory()->create();
    delStock($ing, $location, $supplier, $user);

    // AP-50: belegter Lagerort ohne Ziel-Lagerort bleibt gesperrt (Übernahme-Ziel nötig).
    $this->delete(route('admin.inventory.locations.destroy', $location))
        ->assertRedirect();

    expect(session('alert-error'))->toContain('Ziel-Lagerort');
    expect(Location::query()->find($location->id))->not->toBeNull();
});

test('lieferant mit wareneingang kann nicht geloescht werden', function () {
    $this->actingAs(delUser(7), 'user');

    $user = delUser();
    $ing = delIngredient('Del-Sup-INCI');
    $location = Location::factory()->create();
    $supplier = Supplier::factory()->create();
    delStock($ing, $location, $supplier, $user);

    $this->delete(route('admin.inventory.suppliers.destroy', $supplier));

    expect(session('alert-error'))->toContain('Löschen nicht möglich');
    expect(Supplier::query()->find($supplier->id))->not->toBeNull();
});

// --- Wareneingänge ---

test('gebuchter wareneingang ohne abhaengigkeiten wird geloescht und bestand sinkt', function () {
    $admin = delUser(7);
    $this->actingAs($admin, 'user');

    $ing = delIngredient('Del-SE-INCI');
    $location = Location::factory()->create();
    $supplier = Supplier::factory()->create();
    $entry = delStock($ing, $location, $supplier, $admin);

    expect(app(InventoryService::class)->remainingByIngredient([$ing->id])[$ing->id] ?? 0.0)->toBe(1000.0);

    $this->delete(route('admin.inventory.stock-entries.destroy', $entry))
        ->assertRedirect(route('admin.inventory.stock-entries.index'));

    expect(StockEntry::query()->find($entry->id))->toBeNull();
    expect(StockEntry::withTrashed()->find($entry->id))->not->toBeNull();
    expect(app(InventoryService::class)->remainingByIngredient([$ing->id])[$ing->id] ?? 0.0)->toBe(0.0);
});

test('wareneingang mit produktions-verbrauch kann nicht geloescht werden', function () {
    $admin = delUser(7);
    $this->actingAs($admin, 'user');

    $ing = delIngredient('Del-SE-Blocked');
    $location = Location::factory()->create();
    $supplier = Supplier::factory()->create();
    $entry = delStock($ing, $location, $supplier, $admin);

    $product = Product::query()->create(['name' => 'Del-Prod', 'title' => 'Del-Prod', 'active' => true]);
    ProductIngredient::create([
        'product_id' => $product->id,
        'ingredient_id' => $ing->id,
        'pos' => 0,
        'gram' => 10,
        'factor' => 1,
        'recipe_type' => 'manufacturer',
    ]);

    app(ProductionService::class)->store(
        [
            'product_id' => $product->id,
            'location_id' => $location->id,
            'produced_at' => '2026-07-01',
            'quantity' => 10,
            'notes' => null,
        ],
        [['ingredient_id' => $ing->id, 'stock_entry_id' => $entry->id, 'quantity_used' => 100]],
        $admin->id,
    );

    $this->delete(route('admin.inventory.stock-entries.destroy', $entry));

    expect(session('alert-error'))->toContain('Löschen nicht möglich');
    expect(StockEntry::query()->find($entry->id))->not->toBeNull();
});

// --- Ausschuss ---

test('geloeschter ausschuss gibt bestand wieder frei', function () {
    $admin = delUser(7);
    $this->actingAs($admin, 'user');

    $ing = delIngredient('Del-Disposal');
    $location = Location::factory()->create();
    $supplier = Supplier::factory()->create();
    delStock($ing, $location, $supplier, $admin);

    $disposal = StockDisposal::query()->create([
        'disposal_type' => 'ingredient',
        'ingredient_id' => $ing->id,
        'location_id' => $location->id,
        'quantity' => 400,
        'unit' => 'gram',
        'reason' => 'MHD abgelaufen',
        'disposed_at' => '2026-07-01',
        'user_id' => $admin->id,
    ]);

    expect(app(InventoryService::class)->remainingByIngredient([$ing->id])[$ing->id])->toBe(600.0);

    $this->delete(route('admin.inventory.stock-disposals.destroy', $disposal))
        ->assertRedirect(route('admin.inventory.stock-disposals.index'));

    expect(StockDisposal::query()->find($disposal->id))->toBeNull();
    expect(app(InventoryService::class)->remainingByIngredient([$ing->id])[$ing->id])->toBe(1000.0);
});

// --- Produktionen ---

test('geloeschte produktion bucht produktbestand zurueck und gibt rohstoffe frei', function () {
    $admin = delUser(7);
    $this->actingAs($admin, 'user');

    $ing = delIngredient('Del-Prod-INCI');
    $location = Location::factory()->create();
    $supplier = Supplier::factory()->create();
    $entry = delStock($ing, $location, $supplier, $admin);

    $product = Product::query()->create(['name' => 'Del-Prod2', 'title' => 'Del-Prod2', 'active' => true]);
    ProductIngredient::create([
        'product_id' => $product->id,
        'ingredient_id' => $ing->id,
        'pos' => 0,
        'gram' => 10,
        'factor' => 1,
        'recipe_type' => 'manufacturer',
    ]);

    $production = app(ProductionService::class)->store(
        [
            'product_id' => $product->id,
            'location_id' => $location->id,
            'produced_at' => '2026-07-01',
            'quantity' => 10,
            'notes' => null,
        ],
        [['ingredient_id' => $ing->id, 'stock_entry_id' => $entry->id, 'quantity_used' => 100]],
        $admin->id,
    );

    expect(app(ProductStockService::class)->currentStock($product->id))->toBe(10);
    expect(app(InventoryService::class)->remainingByIngredient([$ing->id])[$ing->id])->toBe(900.0);

    $this->delete(route('admin.inventory.productions.destroy', $production))
        ->assertRedirect(route('admin.inventory.productions.index'));

    // Produktion soft-gelöscht, Bestand zurückgebucht (append-only), Rohstoff frei.
    expect(Production::query()->find($production->id))->toBeNull();
    expect(Production::withTrashed()->find($production->id))->not->toBeNull();
    expect(app(ProductStockService::class)->currentStock($product->id))->toBe(0);
    expect(app(InventoryService::class)->remainingByIngredient([$ing->id])[$ing->id])->toBe(1000.0);
    expect(ProductStockMovement::query()->where('product_id', $product->id)->count())->toBe(2);
});

test('nicht-admin darf produktion nicht loeschen', function () {
    $admin = delUser(7);
    $location = Location::factory()->create();
    $product = delSimpleProduct('Del-Guard');

    $production = app(ProductionService::class)->store(
        [
            'product_id' => $product->id,
            'location_id' => $location->id,
            'produced_at' => '2026-07-01',
            'quantity' => 5,
            'notes' => null,
        ],
        [],
        $admin->id,
    );

    $this->actingAs(delUser(1), 'user');
    $this->delete(route('admin.inventory.productions.destroy', $production))
        ->assertRedirect(route('home'));

    expect(Production::query()->find($production->id))->not->toBeNull();
});

// --- INCI ---

test('inci mit wareneingang kann nicht geloescht werden, sauberer inci schon', function () {
    $admin = delUser(7);
    $this->actingAs($admin, 'user');

    $used = delIngredient('Del-INCI-used');
    $clean = delIngredient('Del-INCI-clean');
    $location = Location::factory()->create();
    $supplier = Supplier::factory()->create();
    delStock($used, $location, $supplier, $admin);

    $this->delete(route('admin_product_ingredient_delete', $used->id));
    expect(session('alert-error'))->toContain('Löschen nicht möglich');
    expect(Ingredient::query()->find($used->id))->not->toBeNull();

    $this->delete(route('admin_product_ingredient_delete', $clean->id));
    expect(Ingredient::query()->find($clean->id))->toBeNull();
    expect(Ingredient::withTrashed()->find($clean->id))->not->toBeNull();
});