<?php

namespace Tests\Feature;

use App\Models\Central\Company;
use App\Models\Central\Plan;
use App\Models\Tenant\AiChat;
use App\Models\Tenant\AiMessage;
use App\Models\Tenant\Client;
use App\Models\Tenant\Part;
use App\Models\Tenant\Vehicle;
use App\Models\Tenant\WorkOrder;
use App\Services\Ai\AiAssistantService;
use App\Tenancy\TenantManager;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\Http;
use Tests\TestCase;

class AiHelpersTest extends TestCase
{
    use RefreshDatabase;

    public function test_suggest_diagnosis_calls_provider_with_context(): void
    {
        $ctx = $this->makeCtx(provider: 'claude', key: 'sk-fake');

        Http::fake([
            'api.anthropic.com/*' => Http::response([
                'content' => [['type' => 'text', 'text' => 'Verifică pompa de apă și termostatul.']],
                'usage' => ['input_tokens' => 100, 'output_tokens' => 30],
                'model' => 'claude-sonnet-4-5',
            ]),
        ]);

        $wo = WorkOrder::create([
            'number' => WorkOrder::generateNumber($ctx['company']->id),
            'client_id' => $ctx['client']->id,
            'vehicle_id' => $ctx['vehicle']->id,
            'opened_at' => now(),
            'status' => 'diagnosis',
            'complaint' => 'Motorul se supraîncălzește în trafic.',
        ]);

        [$reply, $meta] = app(AiAssistantService::class)->suggestDiagnosis($wo);

        $this->assertStringContainsString('termostat', $reply);
        $this->assertEquals('claude', $meta['provider']);
        $this->assertEquals(100, $meta['tokens_in']);

        Http::assertSent(function ($req) {
            $body = json_decode($req->body(), true);
            return str_contains($req->url(), 'anthropic.com')
                && str_contains($body['messages'][0]['content'], 'supraîncălzește');
        });
    }

    public function test_suggest_price_includes_buy_and_sell(): void
    {
        $ctx = $this->makeCtx(provider: 'gpt', key: 'sk-openai');

        Http::fake([
            'api.openai.com/*' => Http::response([
                'choices' => [['message' => ['content' => 'Markup 40% → preț 70 MDL.']]],
                'usage' => ['prompt_tokens' => 80, 'completion_tokens' => 15],
                'model' => 'gpt-4o-mini',
            ]),
        ]);

        $part = Part::create([
            'name' => 'Filtru ulei MANN W811/80',
            'brand' => 'MANN',
            'category' => 'Filtre',
            'buy_price' => 50,
            'sell_price' => 65,
            'qty' => 5,
            'unit' => 'buc',
            'is_active' => true,
        ]);

        [$reply, $meta] = app(AiAssistantService::class)->suggestPrice($part);

        $this->assertStringContainsString('Markup', $reply);
        Http::assertSent(function ($req) {
            $body = json_decode($req->body(), true);
            $userMsg = collect($body['messages'])->firstWhere('role', 'user');
            return str_contains($userMsg['content'], '50.00')
                && str_contains($userMsg['content'], 'MANN');
        });
    }

    public function test_vin_recommendations_includes_decoded_data(): void
    {
        $ctx = $this->makeCtx(provider: 'claude', key: 'sk-fake');

        Http::fake([
            'api.anthropic.com/*' => Http::response([
                'content' => [['type' => 'text', 'text' => 'Recomandări mentenanță pentru Honda 2003']],
                'usage' => ['input_tokens' => 50, 'output_tokens' => 20],
            ]),
        ]);

        [$reply, $meta] = app(AiAssistantService::class)
            ->vinRecommendations('1HGCM82633A123456', 150000);

        $this->assertStringContainsString('Honda', $reply);
        $this->assertEquals('Honda', $meta['vin_decoded']['manufacturer']);
        $this->assertEquals(2003, $meta['vin_decoded']['year']);
    }

    public function test_no_api_key_returns_friendly_message(): void
    {
        $this->makeCtx(provider: 'claude', key: null);

        $part = Part::create([
            'name' => 'X', 'unit' => 'buc',
            'buy_price' => 1, 'sell_price' => 2,
            'qty' => 0, 'is_active' => true,
        ]);

        [$reply, $meta] = app(AiAssistantService::class)->suggestPrice($part);
        $this->assertStringContainsString('API key', $reply);
        $this->assertEquals('no_api_key', $meta['error']);
        Http::assertNothingSent();
    }

    public function test_monthly_usage_aggregates_by_provider(): void
    {
        $ctx = $this->makeCtx(provider: 'claude', key: 'sk-fake');

        $user = \App\Models\Tenant\User::create([
            'company_id' => $ctx['company']->id,
            'name' => 'AI User',
            'email' => 'ai-' . uniqid() . '@example.com',
            'password' => bcrypt('x'),
            'role' => 'admin',
            'status' => 'active',
        ]);

        $chat = AiChat::create([
            'company_id' => $ctx['company']->id,
            'user_id' => $user->id,
            'provider' => 'claude',
        ]);

        AiMessage::create([
            'company_id' => $ctx['company']->id,
            'ai_chat_id' => $chat->id,
            'role' => 'assistant',
            'content' => 'X',
            'meta' => ['provider' => 'claude', 'tokens_in' => 100, 'tokens_out' => 50],
        ]);
        AiMessage::create([
            'company_id' => $ctx['company']->id,
            'ai_chat_id' => $chat->id,
            'role' => 'assistant',
            'content' => 'Y',
            'meta' => ['provider' => 'gpt', 'tokens_in' => 200, 'tokens_out' => 80],
        ]);

        $usage = app(AiAssistantService::class)->monthlyUsage();

        $this->assertEquals(100, $usage['claude']['tokens_in']);
        $this->assertEquals(50, $usage['claude']['tokens_out']);
        $this->assertEquals(1, $usage['claude']['calls']);
        $this->assertEquals(280, $usage['gpt']['tokens_in'] + $usage['gpt']['tokens_out']);
    }

    private function makeCtx(string $provider, ?string $key): array
    {
        $plan = Plan::firstOrCreate(['slug' => 'test'], ['name' => 'Test', 'price' => 0, 'features' => []]);
        $company = Company::create([
            'plan_id' => $plan->id,
            'slug' => 'ai-' . uniqid(),
            'name' => 'AI Service',
            'city' => 'Chișinău',
            'status' => 'active',
            'settings' => [
                'ai' => [
                    'default_provider' => $provider,
                    "{$provider}_key" => $key,
                ],
            ],
        ]);
        app(TenantManager::class)->setCurrent($company);

        $client = Client::create([
            'name' => 'C', 'phone' => '+37399' . random_int(100000, 999999),
            'type' => 'individual', 'status' => 'active',
        ]);
        $vehicle = Vehicle::create([
            'client_id' => $client->id,
            'make' => 'VW', 'model' => 'Golf', 'year' => 2015,
            'plate' => 'AI' . random_int(100, 999),
            'mileage' => 120000,
        ]);

        return compact('company', 'client', 'vehicle');
    }
}