<?php

use App\Models\Ingredient;
use App\Models\Location;
use App\Models\MaterialQuality;
use App\Models\PackagingItem;
use App\Models\StockDisposal;
use App\Models\StockEntry;
use App\Models\StockEntryChange;
use App\Models\Supplier;
use App\Services\InventoryService;
use App\User;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

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

/**
 * Anforderung 14.09.2026: Einkäufe/Wareneingänge nachträglich korrigierbar —
 * auch gebuchte — mit Änderungsprotokoll (wer/wann/warum, alt → neu).
 */
function corrAdmin(): User
{
    $user = User::query()->create(['email' => uniqid('corr_', true).'@test.example', 'password' => bcrypt('password')]);
    $user->forceFill(['admin' => 7, 'confirmed' => true, 'active' => true, 'wizard' => 100, 'blocked' => false])->save();

    return $user->fresh();
}

/**
 * @return array{0: User, 1: Ingredient, 2: Location, 3: Supplier, 4: MaterialQuality, 5: StockEntry}
 */
function corrReceived(?float $density = null, float $received = 1000): array
{
    $admin = corrAdmin();
    $ing = Ingredient::query()->create(['name' => 'Corr-'.uniqid('', true), 'active' => true, 'pos' => 0, 'density' => $density]);
    $location = Location::factory()->create();
    $supplier = Supplier::factory()->create();
    $quality = MaterialQuality::factory()->create();
    $entry = StockEntry::query()->create([
        'entry_type' => 'ingredient', 'ingredient_id' => $ing->id, 'supplier_id' => $supplier->id, 'location_id' => $location->id,
        'unit' => 'gram', 'purchase_unit' => $density ? 'ml' : 'gram', 'density_used' => $density,
        'ordered_by' => $admin->id, 'ordered_at' => '2026-09-01', 'ordered_quantity' => $received, 'price_per_kg' => 10, 'price_per_kg_gross' => 10,
        'status' => 'received', 'received_by' => $admin->id, 'received_at' => '2026-09-05', 'received_quantity' => $received,
        'batch_number' => 'CH-1', 'best_before' => '2027-01-01', 'quality_id' => $quality->id,
    ]);

    return [$admin, $ing, $location, $supplier, $quality, $entry];
}

/**
 * @return array<string, string>
 */
function corrPayload(StockEntry $entry, array $overrides = []): array
{
    return array_merge([
        'entry_type' => 'ingredient', 'ingredient_id' => (string) $entry->ingredient_id, 'supplier_id' => (string) $entry->supplier_id,
        'location_id' => (string) $entry->location_id, 'quality_id' => (string) $entry->quality_id, 'ordered_at' => '01.09.2026',
        'ordered_quantity' => '1000', 'ordered_unit' => 'gram', 'price_per_kg' => '10,00',
        'received_at' => '05.09.2026', 'received_quantity' => '1000', 'batch_number' => 'CH-1', 'best_before' => '01.01.2027',
        'change_reason' => 'Tippfehler bei der Menge',
    ], $overrides);
}

test('gebuchter eingang ist korrigierbar und wirkt sofort auf den bestand', function () {
    [$admin, $ing, , , , $entry] = corrReceived();
    $this->actingAs($admin, 'user');

    $this->get(route('admin.inventory.stock-entries.edit', $entry))->assertOk()->assertSee('Wareneingang korrigieren');

    $this->put(route('admin.inventory.stock-entries.update', $entry), corrPayload($entry, ['received_quantity' => '900', 'batch_number' => 'CH-2']))
        ->assertSessionHasNoErrors()
        ->assertRedirect(route('admin.inventory.stock-entries.show', $entry));

    $entry->refresh();
    expect((float) $entry->received_quantity)->toBe(900.0)
        ->and($entry->batch_number)->toBe('CH-2')
        ->and($entry->status)->toBe('received')
        ->and(app(InventoryService::class)->remainingByIngredient([$ing->id])[$ing->id])->toBe(900.0);

    $change = StockEntryChange::query()->where('stock_entry_id', $entry->id)->firstOrFail();
    expect($change->user_id)->toBe($admin->id)
        ->and($change->status_before)->toBe('received')
        ->and($change->reason)->toBe('Tippfehler bei der Menge')
        ->and($change->field_changes['received_quantity'])->toEqual(['old' => 1000, 'new' => 900])
        ->and($change->field_changes['batch_number'])->toBe(['old' => 'CH-1', 'new' => 'CH-2'])
        ->and($change->field_changes)->not->toHaveKey('ordered_quantity');

    $rows = collect($change->describe());
    expect($rows->pluck('label')->all())->toBe(['Eingegangene Menge', 'Charge'])
        ->and($rows[0]['old'])->toBe('1.000,00 g')->and($rows[0]['new'])->toBe('900,00 g');

    $this->get(route('admin.inventory.stock-entries.show', $entry))
        ->assertOk()->assertSee('Änderungsprotokoll')->assertSee('Tippfehler bei der Menge')->assertSee('CH-1')->assertSee('CH-2');
});

test('korrektur eines gebuchten eingangs braucht einen grund', function () {
    [$admin, , , , , $entry] = corrReceived();
    $this->actingAs($admin, 'user');

    $this->from(route('admin.inventory.stock-entries.edit', $entry))
        ->put(route('admin.inventory.stock-entries.update', $entry), corrPayload($entry, ['received_quantity' => '900', 'change_reason' => '']))
        ->assertSessionHasErrors('change_reason');

    expect((float) $entry->fresh()->received_quantity)->toBe(1000.0)
        ->and(StockEntryChange::query()->count())->toBe(0);
});

test('korrektur darf die menge nicht unter den verbrauch senken', function () {
    [$admin, $ing, $location, , , $entry] = corrReceived();
    $this->actingAs($admin, 'user');

    StockDisposal::query()->create([
        'disposal_type' => 'ingredient', 'ingredient_id' => $ing->id, 'stock_entry_id' => $entry->id, 'location_id' => $location->id,
        'quantity' => 400, 'unit' => 'gram', 'reason' => 'Test', 'disposed_at' => '2026-09-06', 'user_id' => $admin->id,
    ]);

    // 300 g < 400 g Verbrauch → abgelehnt, nichts geändert, kein Protokoll.
    $this->put(route('admin.inventory.stock-entries.update', $entry), corrPayload($entry, ['received_quantity' => '300']))
        ->assertRedirect(route('admin.inventory.stock-entries.edit', $entry))
        ->assertSessionHasErrors('received_quantity');
    expect((float) $entry->fresh()->received_quantity)->toBe(1000.0)
        ->and(StockEntryChange::query()->count())->toBe(0);

    // Rohstoffwechsel bei Verbrauch → abgelehnt.
    $other = Ingredient::query()->create(['name' => 'Corr-Other', 'active' => true, 'pos' => 0]);
    $this->put(route('admin.inventory.stock-entries.update', $entry), corrPayload($entry, ['ingredient_id' => (string) $other->id]))
        ->assertSessionHasErrors('ingredient_id');
    expect((int) $entry->fresh()->ingredient_id)->toBe($ing->id);

    // 400 g = genau der Verbrauch → erlaubt.
    $this->put(route('admin.inventory.stock-entries.update', $entry), corrPayload($entry, ['received_quantity' => '400']))
        ->assertSessionHasNoErrors();
    expect((float) $entry->fresh()->received_quantity)->toBe(400.0);
});

test('korrektur eines ml-eingangs rechnet die eingegangene menge über die dichte um', function () {
    [$admin, , , , , $entry] = corrReceived(0.8, 800);
    $this->actingAs($admin, 'user');

    // Formular zeigt 1.000 ml (800 g / 0,8); Korrektur auf 900 ml → 720 g.
    $this->get(route('admin.inventory.stock-entries.edit', $entry))->assertOk()->assertSee('value="1.000,00"', false);

    $this->put(route('admin.inventory.stock-entries.update', $entry), corrPayload($entry, [
        'ordered_unit' => 'ml', 'ordered_quantity' => '1000', 'received_quantity' => '900',
    ]))->assertSessionHasNoErrors();

    $entry->refresh();
    expect((float) $entry->received_quantity)->toBe(720.0)
        ->and((float) $entry->ordered_quantity)->toBe(800.0)
        ->and($entry->purchase_unit)->toBe('ml');
});

test('offene bestellung: bearbeiten protokolliert ohne pflichtgrund', function () {
    [$admin, , , , , $entry] = corrReceived();
    $entry->update(['status' => 'pending', 'received_at' => null, 'received_quantity' => null, 'batch_number' => null, 'best_before' => null, 'received_by' => null]);
    $this->actingAs($admin, 'user');

    $this->put(route('admin.inventory.stock-entries.update', $entry), array_diff_key(corrPayload($entry, ['ordered_quantity' => '1200']), array_flip(['received_at', 'received_quantity', 'batch_number', 'best_before', 'change_reason'])))
        ->assertSessionHasNoErrors()
        ->assertRedirect(route('admin.inventory.stock-entries.index'));

    $entry->refresh();
    expect((float) $entry->ordered_quantity)->toBe(1200.0)->and($entry->status)->toBe('pending');
    $change = StockEntryChange::query()->firstOrFail();
    expect($change->status_before)->toBe('pending')->and($change->reason)->toBeNull()
        ->and($change->field_changes)->toHaveKey('ordered_quantity')->and($change->field_changes)->not->toHaveKey('received_quantity');

    // Speichern ohne Änderung erzeugt keine Protokollzeile.
    $this->put(route('admin.inventory.stock-entries.update', $entry), array_diff_key(corrPayload($entry, ['ordered_quantity' => '1200']), array_flip(['received_at', 'received_quantity', 'batch_number', 'best_before', 'change_reason'])))
        ->assertSessionHasNoErrors();
    expect(StockEntryChange::query()->count())->toBe(1);
});

test('verpackung: korrektur darf den artikelbestand nicht negativ machen', function () {
    $admin = corrAdmin();
    $this->actingAs($admin, 'user');
    $item = PackagingItem::factory()->create();
    $location = Location::factory()->create();
    $supplier = Supplier::factory()->create();
    $entry = StockEntry::query()->create([
        'entry_type' => 'packaging', 'packaging_item_id' => $item->id, 'supplier_id' => $supplier->id, 'location_id' => $location->id,
        'unit' => 'piece', 'ordered_by' => $admin->id, 'ordered_at' => '2026-09-01', 'ordered_quantity' => 100, 'price_total' => 50,
        'status' => 'received', 'received_by' => $admin->id, 'received_at' => '2026-09-05', 'received_quantity' => 100,
    ]);
    StockDisposal::query()->create([
        'disposal_type' => 'packaging', 'packaging_item_id' => $item->id, 'location_id' => $location->id,
        'quantity' => 60, 'unit' => 'piece', 'reason' => 'Test', 'disposed_at' => '2026-09-06', 'user_id' => $admin->id,
    ]);

    $base = [
        'entry_type' => 'packaging', 'packaging_item_id' => (string) $item->id, 'supplier_id' => (string) $supplier->id,
        'location_id' => (string) $location->id, 'ordered_at' => '01.09.2026', 'ordered_quantity' => '100', 'price_total' => '50,00',
        'received_at' => '05.09.2026', 'change_reason' => 'Zählfehler',
    ];
    $this->put(route('admin.inventory.stock-entries.update', $entry), $base + ['received_quantity' => '50'])
        ->assertSessionHasErrors('received_quantity');
    $this->put(route('admin.inventory.stock-entries.update', $entry), $base + ['received_quantity' => '60'])
        ->assertSessionHasNoErrors();
    expect((float) $entry->fresh()->received_quantity)->toBe(60.0)
        ->and(app(InventoryService::class)->remainingByPackagingItem([$item->id])[$item->id])->toBe(0.0);
});