<?php

namespace Modules\ProjectProgress\Tests\Feature;

use Tests\TestCase;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Modules\ProjectManagement\Models\Project;
use Modules\ProjectManagement\Models\Task;
use Modules\ProjectProgress\Services\ProjectProgressService;

class EvmCalculationTest extends TestCase
{
    use RefreshDatabase;

    public function test_evm_s_curve_data_generation()
    {
        $project = Project::factory()->create([
            'start_date' => now()->subDays(10)->format('Y-m-d'),
            'target_end_date' => now()->addDays(20)->format('Y-m-d'),
        ]);

        Task::factory()->create([
            'project_id' => $project->id,
            'status' => 'completed',
            'completion_percentage' => 100,
            'start_date' => now()->subDays(10)->format('Y-m-d'),
            'end_date' => now()->subDays(2)->format('Y-m-d'),
        ]);

        Task::factory()->create([
            'project_id' => $project->id,
            'status' => 'in_progress',
            'completion_percentage' => 50,
            'start_date' => now()->subDays(5)->format('Y-m-d'),
            'end_date' => now()->addDays(15)->format('Y-m-d'),
        ]);

        $service = new ProjectProgressService();
        $evmData = $service->getEvmAnalysisData($project);

        $this->assertIsArray($evmData);
        $this->assertArrayHasKey('timeSeries', $evmData);
        $this->assertArrayHasKey('summary', $evmData);
        
        $summary = $evmData['summary'];
        $this->assertGreaterThan(0, $summary['actual_ev']);
        $this->assertNotNull($summary['spi']);
        $this->assertNotNull($summary['schedule_variance']);
    }

    public function test_evm_with_milestones_and_accomplishment_dates()
    {
        $project = Project::factory()->create([
            'start_date' => now()->subDays(30)->format('Y-m-d'),
            'target_end_date' => now()->addDays(30)->format('Y-m-d'),
        ]);

        $m1 = $project->milestones()->create([
            'name' => 'Substructure',
            'weight_percentage' => 40,
            'planned_date' => now()->subDays(10)->format('Y-m-d'),
            'actual_date' => now()->subDays(12)->format('Y-m-d'),
            'sort_order' => 1,
        ]);

        $m2 = $project->milestones()->create([
            'name' => 'Superstructure',
            'weight_percentage' => 60,
            'planned_date' => now()->addDays(20)->format('Y-m-d'),
            'actual_date' => null,
            'sort_order' => 2,
        ]);

        Task::factory()->create([
            'project_id' => $project->id,
            'milestone_id' => $m2->id,
            'status' => 'in_progress',
            'completion_percentage' => 50,
            'start_date' => now()->subDays(5)->format('Y-m-d'),
            'actual_start_date' => now()->subDays(5)->format('Y-m-d'),
            'end_date' => now()->addDays(20)->format('Y-m-d'),
        ]);

        $service = new ProjectProgressService();
        $evmData = $service->getEvmAnalysisData($project);

        $this->assertIsArray($evmData);
        $this->assertNotEmpty($evmData['timeSeries']);
        // Milestone 1 (40%) completed + Milestone 2 (50% of 60% = 30%) -> Total 70%
        $this->assertEquals(70.0, $evmData['summary']['actual_ev']);
    }
}