<?php

namespace Tests\Unit;

use App\Models\AnalyticsSession;
use App\Models\Goal;
use App\Models\GoalConversion;
use App\Models\Visitor;
use App\Models\Website;
use App\Services\GoalEvaluationService;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Carbon;
use Tests\TestCase;

class GoalEvaluationServiceTest extends TestCase
{
    use RefreshDatabase;

    private GoalEvaluationService $service;

    private Website $website;

    private Visitor $visitor;

    private AnalyticsSession $session;

    protected function setUp(): void
    {
        parent::setUp();
        $this->service = new GoalEvaluationService;
        $this->website = Website::factory()->create();
        $this->visitor = Visitor::factory()->for($this->website)->create();
        $this->session = AnalyticsSession::factory()->for($this->website)->create([
            'visitor_id' => $this->visitor->id,
            'duration' => 120,
            'pages_count' => 5,
        ]);
    }

    // -- URL Destination --

    public function test_url_destination_exact_match(): void
    {
        $goal = Goal::factory()->for($this->website)->urlDestination('/thank-you')->create();

        $this->service->evaluate($this->website, $this->visitor, $this->session, [
            'type' => 'pageview',
            'path' => '/thank-you',
        ], Carbon::now());

        $this->assertDatabaseHas('goal_conversions', [
            'goal_id' => $goal->id,
            'visitor_id' => $this->visitor->id,
        ]);
    }

    public function test_url_destination_exact_mismatch(): void
    {
        Goal::factory()->for($this->website)->urlDestination('/thank-you')->create();

        $this->service->evaluate($this->website, $this->visitor, $this->session, [
            'type' => 'pageview',
            'path' => '/other-page',
        ], Carbon::now());

        $this->assertDatabaseCount('goal_conversions', 0);
    }

    public function test_url_destination_starts_with(): void
    {
        $goal = Goal::factory()->for($this->website)->urlDestination('/checkout', 'starts_with')->create();

        $this->service->evaluate($this->website, $this->visitor, $this->session, [
            'type' => 'pageview',
            'path' => '/checkout/step-2',
        ], Carbon::now());

        $this->assertDatabaseHas('goal_conversions', ['goal_id' => $goal->id]);
    }

    public function test_url_destination_contains(): void
    {
        $goal = Goal::factory()->for($this->website)->urlDestination('success', 'contains')->create();

        $this->service->evaluate($this->website, $this->visitor, $this->session, [
            'type' => 'pageview',
            'path' => '/order/success/123',
        ], Carbon::now());

        $this->assertDatabaseHas('goal_conversions', ['goal_id' => $goal->id]);
    }

    public function test_url_destination_regex(): void
    {
        $goal = Goal::factory()->for($this->website)->urlDestination('/^\\/order\\/\\d+$/', 'regex')->create();

        $this->service->evaluate($this->website, $this->visitor, $this->session, [
            'type' => 'pageview',
            'path' => '/order/42',
        ], Carbon::now());

        $this->assertDatabaseHas('goal_conversions', ['goal_id' => $goal->id]);
    }

    // -- Event Match --

    public function test_event_match_by_name(): void
    {
        $goal = Goal::factory()->for($this->website)->eventMatch('purchase')->create();

        $this->service->evaluate($this->website, $this->visitor, $this->session, [
            'type' => 'event',
            'event_name' => 'purchase',
        ], Carbon::now());

        $this->assertDatabaseHas('goal_conversions', ['goal_id' => $goal->id]);
    }

    public function test_event_match_wrong_name_does_not_convert(): void
    {
        Goal::factory()->for($this->website)->eventMatch('purchase')->create();

        $this->service->evaluate($this->website, $this->visitor, $this->session, [
            'type' => 'event',
            'event_name' => 'signup',
        ], Carbon::now());

        $this->assertDatabaseCount('goal_conversions', 0);
    }

    public function test_event_match_with_category(): void
    {
        $goal = Goal::factory()->for($this->website)->eventMatch('click', 'cta')->create();

        // wrong category
        $this->service->evaluate($this->website, $this->visitor, $this->session, [
            'type' => 'event',
            'event_name' => 'click',
            'event_category' => 'navigation',
        ], Carbon::now());
        $this->assertDatabaseCount('goal_conversions', 0);

        // right category
        $this->service->evaluate($this->website, $this->visitor, $this->session, [
            'type' => 'event',
            'event_name' => 'click',
            'event_category' => 'cta',
        ], Carbon::now());
        $this->assertDatabaseCount('goal_conversions', 1);
    }

    public function test_event_match_requires_event_type(): void
    {
        Goal::factory()->for($this->website)->eventMatch('purchase')->create();

        $this->service->evaluate($this->website, $this->visitor, $this->session, [
            'type' => 'pageview',
            'event_name' => 'purchase',
        ], Carbon::now());

        $this->assertDatabaseCount('goal_conversions', 0);
    }

    // -- Duration --

    public function test_duration_goal_converts_when_threshold_met(): void
    {
        $goal = Goal::factory()->for($this->website)->duration(60)->create();

        $this->service->evaluate($this->website, $this->visitor, $this->session, [
            'type' => 'pageview',
            'path' => '/',
        ], Carbon::now());

        $this->assertDatabaseHas('goal_conversions', ['goal_id' => $goal->id]);
    }

    public function test_duration_goal_does_not_convert_below_threshold(): void
    {
        Goal::factory()->for($this->website)->duration(300)->create();

        $this->service->evaluate($this->website, $this->visitor, $this->session, [
            'type' => 'pageview',
            'path' => '/',
        ], Carbon::now());

        $this->assertDatabaseCount('goal_conversions', 0);
    }

    // -- Pages per session --

    public function test_pages_per_session_goal_converts(): void
    {
        $goal = Goal::factory()->for($this->website)->pagesPerSession(3)->create();

        $this->service->evaluate($this->website, $this->visitor, $this->session, [
            'type' => 'pageview',
            'path' => '/',
        ], Carbon::now());

        $this->assertDatabaseHas('goal_conversions', ['goal_id' => $goal->id]);
    }

    public function test_pages_per_session_goal_does_not_convert_below_threshold(): void
    {
        Goal::factory()->for($this->website)->pagesPerSession(10)->create();

        $this->service->evaluate($this->website, $this->visitor, $this->session, [
            'type' => 'pageview',
            'path' => '/',
        ], Carbon::now());

        $this->assertDatabaseCount('goal_conversions', 0);
    }

    // -- De-duplication --

    public function test_does_not_duplicate_conversion_within_same_session(): void
    {
        $goal = Goal::factory()->for($this->website)->urlDestination('/thank-you')->create();

        $this->service->evaluate($this->website, $this->visitor, $this->session, [
            'type' => 'pageview',
            'path' => '/thank-you',
        ], Carbon::now());

        $this->service->evaluate($this->website, $this->visitor, $this->session, [
            'type' => 'pageview',
            'path' => '/thank-you',
        ], Carbon::now());

        $this->assertDatabaseCount('goal_conversions', 1);
    }

    // -- Inactive goals --

    public function test_inactive_goals_are_skipped(): void
    {
        Goal::factory()->for($this->website)->urlDestination('/thank-you')->inactive()->create();

        $this->service->evaluate($this->website, $this->visitor, $this->session, [
            'type' => 'pageview',
            'path' => '/thank-you',
        ], Carbon::now());

        $this->assertDatabaseCount('goal_conversions', 0);
    }

    // -- Conversion value --

    public function test_conversion_stores_goal_default_value(): void
    {
        $goal = Goal::factory()->for($this->website)->urlDestination('/buy')->create([
            'default_value' => 49.99,
        ]);

        $this->service->evaluate($this->website, $this->visitor, $this->session, [
            'type' => 'pageview',
            'path' => '/buy',
        ], Carbon::now());

        $conversion = GoalConversion::where('goal_id', $goal->id)->first();
        $this->assertNotNull($conversion);
        $this->assertEquals(49.99, (float) $conversion->value);
    }

    // -- Multiple goals --

    public function test_evaluates_multiple_goals_independently(): void
    {
        $goal1 = Goal::factory()->for($this->website)->urlDestination('/thank-you')->create();
        $goal2 = Goal::factory()->for($this->website)->duration(60)->create();
        Goal::factory()->for($this->website)->urlDestination('/other-page')->create();

        $this->service->evaluate($this->website, $this->visitor, $this->session, [
            'type' => 'pageview',
            'path' => '/thank-you',
        ], Carbon::now());

        $this->assertDatabaseCount('goal_conversions', 2);
        $this->assertDatabaseHas('goal_conversions', ['goal_id' => $goal1->id]);
        $this->assertDatabaseHas('goal_conversions', ['goal_id' => $goal2->id]);
    }
}