<?php

namespace Tests\Feature\Allocation;

use App\Models\Allocation;
use App\Models\Project;
use App\Models\Role;
use App\Models\TeamMember;
use App\Models\User;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

class AllocationTest extends TestCase
{
    use RefreshDatabase;

    protected function loginAsManager()
    {
        $user = User::factory()->create([
            'email' => 'manager@example.com',
            'password' => bcrypt('password123'),
            'role' => 'manager',
            'active' => true,
        ]);

        $response = $this->postJson('/api/auth/login', [
            'email' => 'manager@example.com',
            'password' => 'password123',
        ]);

        return $response->json('access_token');
    }

    // 5.1.11 API test: POST /api/allocations creates allocation
    public function test_post_allocations_creates_allocation()
    {
        $token = $this->loginAsManager();
        $role = Role::factory()->create();
        $teamMember = TeamMember::factory()->create(['role_id' => $role->id, 'active' => true]);
        $project = Project::factory()->create();

        $response = $this->withHeader('Authorization', "Bearer {$token}")
            ->postJson('/api/allocations', [
                'project_id' => $project->id,
                'team_member_id' => $teamMember->id,
                'month' => '2026-02',
                'allocated_hours' => 40,
            ]);

        $response->assertStatus(201);
        $response->assertJson([
            'data' => [
                'project_id' => $project->id,
                'team_member_id' => $teamMember->id,
                'allocated_hours' => '40.00',
            ],
        ]);

        $this->assertDatabaseHas('allocations', [
            'project_id' => $project->id,
            'team_member_id' => $teamMember->id,
            'allocated_hours' => 40,
        ]);
    }

    // 5.1.12 API test: Validate hours >= 0
    public function test_validate_hours_must_be_greater_than_or_equal_zero()
    {
        $token = $this->loginAsManager();
        $role = Role::factory()->create();
        $teamMember = TeamMember::factory()->create(['role_id' => $role->id]);
        $project = Project::factory()->create();

        // Test with negative hours
        $response = $this->withHeader('Authorization', "Bearer {$token}")
            ->postJson('/api/allocations', [
                'project_id' => $project->id,
                'team_member_id' => $teamMember->id,
                'month' => '2026-02',
                'allocated_hours' => -10,
            ]);

        $response->assertStatus(422);
        $response->assertJsonValidationErrors(['allocated_hours']);
        $response->assertJsonFragment([
            'allocated_hours' => ['The allocated hours field must be at least 0.'],
        ]);
    }

    // 5.1.13 API test: GET /api/allocations returns matrix
    public function test_get_allocations_returns_matrix()
    {
        $token = $this->loginAsManager();
        $role = Role::factory()->create();
        $teamMember = TeamMember::factory()->create(['role_id' => $role->id, 'active' => true]);
        $project = Project::factory()->create();

        // Create allocation
        Allocation::factory()->create([
            'project_id' => $project->id,
            'team_member_id' => $teamMember->id,
            'month' => '2026-02',
            'allocated_hours' => 40,
        ]);

        $response = $this->withHeader('Authorization', "Bearer {$token}")
            ->getJson('/api/allocations?month=2026-02');

        $response->assertStatus(200);
        $response->assertJsonStructure([
            'data' => [
                '*' => [
                    'project_id',
                    'team_member_id',
                    'month',
                    'allocated_hours',
                ],
            ],
        ]);
    }

    // 5.1.14 API test: PUT /api/allocations/{id} updates
    public function test_put_allocations_updates()
    {
        $token = $this->loginAsManager();
        $allocation = Allocation::factory()->create([
            'allocated_hours' => 40,
        ]);

        $response = $this->withHeader('Authorization', "Bearer {$token}")
            ->putJson("/api/allocations/{$allocation->id}", [
                'allocated_hours' => 60,
            ]);

        $response->assertStatus(200);
        $response->assertJson([
            'data' => [
                'id' => $allocation->id,
                'allocated_hours' => '60.00',
            ],
        ]);

        $this->assertDatabaseHas('allocations', [
            'id' => $allocation->id,
            'allocated_hours' => 60,
        ]);
    }

    // 5.1.15 API test: DELETE /api/allocations/{id} removes
    public function test_delete_allocation_removes()
    {
        $token = $this->loginAsManager();
        $allocation = Allocation::factory()->create();

        $response = $this->withHeader('Authorization', "Bearer {$token}")
            ->deleteJson("/api/allocations/{$allocation->id}");

        $response->assertStatus(200);
        $response->assertJson([
            'message' => 'Allocation deleted successfully',
        ]);

        $this->assertDatabaseMissing('allocations', [
            'id' => $allocation->id,
        ]);
    }

    // 5.1.16 API test: POST /api/allocations/bulk creates multiple
    public function test_post_allocations_bulk_creates_multiple()
    {
        $token = $this->loginAsManager();
        $role = Role::factory()->create();
        $teamMember1 = TeamMember::factory()->create(['role_id' => $role->id, 'active' => true]);
        $teamMember2 = TeamMember::factory()->create(['role_id' => $role->id, 'active' => true]);
        $project = Project::factory()->create();

        $response = $this->withHeader('Authorization', "Bearer {$token}")
            ->postJson('/api/allocations/bulk', [
                'allocations' => [
                    [
                        'project_id' => $project->id,
                        'team_member_id' => $teamMember1->id,
                        'month' => '2026-02',
                        'allocated_hours' => 40,
                    ],
                    [
                        'project_id' => $project->id,
                        'team_member_id' => $teamMember2->id,
                        'month' => '2026-02',
                        'allocated_hours' => 32,
                    ],
                ],
            ]);

        $response->assertStatus(201);
        $response->assertJsonCount(2, 'data');

        $this->assertDatabaseHas('allocations', [
            'project_id' => $project->id,
            'team_member_id' => $teamMember1->id,
            'allocated_hours' => 40,
        ]);
        $this->assertDatabaseHas('allocations', [
            'project_id' => $project->id,
            'team_member_id' => $teamMember2->id,
            'allocated_hours' => 32,
        ]);
    }

    // Test: Allocate zero hours is allowed
    public function test_allocate_zero_hours_is_allowed()
    {
        $token = $this->loginAsManager();
        $role = Role::factory()->create();
        $teamMember = TeamMember::factory()->create(['role_id' => $role->id]);
        $project = Project::factory()->create();

        $response = $this->withHeader('Authorization', "Bearer {$token}")
            ->postJson('/api/allocations', [
                'project_id' => $project->id,
                'team_member_id' => $teamMember->id,
                'month' => '2026-02',
                'allocated_hours' => 0,
            ]);

        $response->assertStatus(201);
        $response->assertJson([
            'data' => [
                'allocated_hours' => '0.00',
            ],
        ]);
    }

    // Test: Cannot update non-existent allocation
    public function test_cannot_update_nonexistent_allocation()
    {
        $token = $this->loginAsManager();

        $response = $this->withHeader('Authorization', "Bearer {$token}")
            ->putJson('/api/allocations/nonexistent-id', [
                'allocated_hours' => 60,
            ]);

        $response->assertStatus(404);
        $response->assertJson([
            'message' => 'Allocation not found',
        ]);
    }

    // Test: Cannot delete non-existent allocation
    public function test_cannot_delete_nonexistent_allocation()
    {
        $token = $this->loginAsManager();

        $response = $this->withHeader('Authorization', "Bearer {$token}")
            ->deleteJson('/api/allocations/nonexistent-id');

        $response->assertStatus(404);
    }

    // ===== Allocation Indicator Tests =====
    // 1.1 API test: GET /api/allocations returns allocation_indicator per item
    public function test_get_allocations_returns_allocation_indicator()
    {
        $token = $this->loginAsManager();
        $role = Role::factory()->create();
        $teamMember = TeamMember::factory()->create(['role_id' => $role->id, 'active' => true]);
        $project = Project::factory()->create(['approved_estimate' => 100]);

        Allocation::factory()->create([
            'project_id' => $project->id,
            'team_member_id' => $teamMember->id,
            'month' => '2026-02-01',
            'allocated_hours' => 100,
        ]);

        $response = $this->withHeader('Authorization', "Bearer {$token}")
            ->getJson('/api/allocations?month=2026-02');

        $response->assertStatus(200);
        $response->assertJsonStructure([
            'data' => [
                '*' => ['allocation_indicator'],
            ],
        ]);
    }

    // 1.2 API test: allocation_indicator is green when >= 100%
    public function test_allocation_indicator_is_green_when_full()
    {
        $token = $this->loginAsManager();
        $role = Role::factory()->create();
        $teamMember = TeamMember::factory()->create(['role_id' => $role->id, 'active' => true]);
        $project = Project::factory()->create(['approved_estimate' => 100]);

        Allocation::factory()->create([
            'project_id' => $project->id,
            'team_member_id' => $teamMember->id,
            'month' => '2026-02-01',
            'allocated_hours' => 100,
        ]);

        $response = $this->withHeader('Authorization', "Bearer {$token}")
            ->getJson('/api/allocations?month=2026-02');

        $response->assertStatus(200);
        $response->assertJsonPath('data.0.allocation_indicator', 'green');
    }

    // 1.3 API test: allocation_indicator is yellow when < 100%
    public function test_allocation_indicator_is_yellow_when_under()
    {
        $token = $this->loginAsManager();
        $role = Role::factory()->create();
        $teamMember = TeamMember::factory()->create(['role_id' => $role->id, 'active' => true]);
        $project = Project::factory()->create(['approved_estimate' => 100]);

        Allocation::factory()->create([
            'project_id' => $project->id,
            'team_member_id' => $teamMember->id,
            'month' => '2026-02-01',
            'allocated_hours' => 80,
        ]);

        $response = $this->withHeader('Authorization', "Bearer {$token}")
            ->getJson('/api/allocations?month=2026-02');

        $response->assertStatus(200);
        $response->assertJsonPath('data.0.allocation_indicator', 'yellow');
    }

    // 1.4 API test: allocation_indicator is red when > 100%
    public function test_allocation_indicator_is_red_when_over()
    {
        $token = $this->loginAsManager();
        $role = Role::factory()->create();
        $teamMember = TeamMember::factory()->create(['role_id' => $role->id, 'active' => true]);
        $project = Project::factory()->create(['approved_estimate' => 100]);

        Allocation::factory()->create([
            'project_id' => $project->id,
            'team_member_id' => $teamMember->id,
            'month' => '2026-02-01',
            'allocated_hours' => 120,
        ]);

        $response = $this->withHeader('Authorization', "Bearer {$token}")
            ->getJson('/api/allocations?month=2026-02');

        $response->assertStatus(200);
        $response->assertJsonPath('data.0.allocation_indicator', 'red');
    }

    // 1.5 API test: allocation_indicator is gray when no approved_estimate
    public function test_allocation_indicator_is_gray_when_no_estimate()
    {
        $token = $this->loginAsManager();
        $role = Role::factory()->create();
        $teamMember = TeamMember::factory()->create(['role_id' => $role->id, 'active' => true]);
        $project = Project::factory()->create(['approved_estimate' => null]);

        Allocation::factory()->create([
            'project_id' => $project->id,
            'team_member_id' => $teamMember->id,
            'month' => '2026-02-01',
            'allocated_hours' => 40,
        ]);

        $response = $this->withHeader('Authorization', "Bearer {$token}")
            ->getJson('/api/allocations?month=2026-02');

        $response->assertStatus(200);
        $response->assertJsonPath('data.0.allocation_indicator', 'gray');
    }

    // ===== Untracked Allocation Tests =====
    // 2.1 API test: POST /api/allocations accepts null team_member_id
    public function test_can_create_allocation_with_null_team_member()
    {
        $token = $this->loginAsManager();
        $project = Project::factory()->create();

        $response = $this->withHeader('Authorization', "Bearer {$token}")
            ->postJson('/api/allocations', [
                'project_id' => $project->id,
                'team_member_id' => null,
                'month' => '2026-02',
                'allocated_hours' => 40,
            ]);

        $response->assertStatus(201);
        $response->assertJsonPath('data.team_member_id', null);
        $response->assertJsonPath('data.team_member', null);
    }

    // 2.2 API test: GET /api/allocations returns null team_member
    public function test_get_allocations_returns_null_team_member()
    {
        $token = $this->loginAsManager();
        $project = Project::factory()->create();

        // Create untracked allocation
        Allocation::factory()->create([
            'project_id' => $project->id,
            'team_member_id' => null,
            'month' => '2026-02-01',
            'allocated_hours' => 40,
        ]);

        $response = $this->withHeader('Authorization', "Bearer {$token}")
            ->getJson('/api/allocations?month=2026-02');

        $response->assertStatus(200);
        $response->assertJsonPath('data.0.team_member_id', null);
        $response->assertJsonPath('data.0.team_member', null);
    }
}