<?php

namespace Tests\Feature;

use App\Models\FinanceDocument;
use App\Models\User;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Foundation\Testing\WithFaker;
use Illuminate\Http\UploadedFile;
use Illuminate\Support\Facades\Storage;
use Spatie\Permission\Models\Role;
use Tests\TestCase;

/**
 * Financial Document Workflow Feature Tests
 *
 * Tests the complete financial document workflow including:
 * - Amount-based routing
 * - Multi-stage approval
 * - Permission-based access control
 */
class FinanceDocumentWorkflowTest extends TestCase
{
    use RefreshDatabase, WithFaker;

    protected User $requester;
    protected User $cashier;
    protected User $accountant;
    protected User $chair;
    protected User $boardMember;

    protected function setUp(): void
    {
        parent::setUp();

        // Create roles
        Role::create(['name' => 'finance_requester']);
        Role::create(['name' => 'finance_cashier']);
        Role::create(['name' => 'finance_accountant']);
        Role::create(['name' => 'finance_chair']);
        Role::create(['name' => 'finance_board_member']);

        // Create test users
        $this->requester = User::factory()->create(['email' => 'requester@test.com']);
        $this->cashier = User::factory()->create(['email' => 'cashier@test.com']);
        $this->accountant = User::factory()->create(['email' => 'accountant@test.com']);
        $this->chair = User::factory()->create(['email' => 'chair@test.com']);
        $this->boardMember = User::factory()->create(['email' => 'board@test.com']);

        // Assign roles
        $this->requester->assignRole('finance_requester');
        $this->cashier->assignRole('finance_cashier');
        $this->accountant->assignRole('finance_accountant');
        $this->chair->assignRole('finance_chair');
        $this->boardMember->assignRole('finance_board_member');

        // Give permissions
        $this->requester->givePermissionTo('create_finance_document');
        $this->cashier->givePermissionTo(['view_finance_documents', 'approve_as_cashier']);
        $this->accountant->givePermissionTo(['view_finance_documents', 'approve_as_accountant']);
        $this->chair->givePermissionTo(['view_finance_documents', 'approve_as_chair']);
        $this->boardMember->givePermissionTo('approve_board_meeting');
    }

    /** @test */
    public function small_amount_workflow_completes_without_chair()
    {
        // Create a small amount document (< 5000)
        $document = FinanceDocument::create([
            'title' => 'Small Expense Reimbursement',
            'description' => 'Test small expense',
            'amount' => 3000,
            'request_type' => 'expense_reimbursement',
            'status' => 'pending',
            'submitted_by_id' => $this->requester->id,
            'submitted_at' => now(),
        ]);

        $document->amount_tier = $document->determineAmountTier();
        $document->save();

        $this->assertEquals('small', $document->amount_tier);

        // Cashier approves
        $this->actingAs($this->cashier);
        $document->status = FinanceDocument::STATUS_APPROVED_CASHIER;
        $document->cashier_approved_by_id = $this->cashier->id;
        $document->cashier_approved_at = now();
        $document->save();

        $this->assertFalse($document->isApprovalStageComplete());

        // Accountant approves (should complete workflow for small amounts)
        $this->actingAs($this->accountant);
        $document->status = FinanceDocument::STATUS_APPROVED_ACCOUNTANT;
        $document->accountant_approved_by_id = $this->accountant->id;
        $document->accountant_approved_at = now();
        $document->save();

        $this->assertTrue($document->isApprovalStageComplete());
        $this->assertEquals('approval', $document->getCurrentWorkflowStage()); // Ready for payment stage
    }

    /** @test */
    public function medium_amount_workflow_requires_chair_approval()
    {
        // Create a medium amount document (5000-50000)
        $document = FinanceDocument::create([
            'title' => 'Medium Purchase Request',
            'description' => 'Test medium purchase',
            'amount' => 25000,
            'request_type' => 'purchase_request',
            'status' => 'pending',
            'submitted_by_id' => $this->requester->id,
            'submitted_at' => now(),
        ]);

        $document->amount_tier = $document->determineAmountTier();
        $document->save();

        $this->assertEquals('medium', $document->amount_tier);
        $this->assertFalse($document->needsBoardMeetingApproval());

        // Cashier approves
        $document->status = FinanceDocument::STATUS_APPROVED_CASHIER;
        $document->cashier_approved_by_id = $this->cashier->id;
        $document->cashier_approved_at = now();
        $document->save();

        $this->assertFalse($document->isApprovalStageComplete());

        // Accountant approves
        $document->status = FinanceDocument::STATUS_APPROVED_ACCOUNTANT;
        $document->accountant_approved_by_id = $this->accountant->id;
        $document->accountant_approved_at = now();
        $document->save();

        $this->assertFalse($document->isApprovalStageComplete()); // Still needs chair

        // Chair approves (should complete workflow for medium amounts)
        $document->status = FinanceDocument::STATUS_APPROVED_CHAIR;
        $document->chair_approved_by_id = $this->chair->id;
        $document->chair_approved_at = now();
        $document->save();

        $this->assertTrue($document->isApprovalStageComplete());
    }

    /** @test */
    public function large_amount_workflow_requires_board_meeting_approval()
    {
        // Create a large amount document (> 50000)
        $document = FinanceDocument::create([
            'title' => 'Large Capital Expenditure',
            'description' => 'Test large expenditure',
            'amount' => 75000,
            'request_type' => 'purchase_request',
            'status' => 'pending',
            'submitted_by_id' => $this->requester->id,
            'submitted_at' => now(),
        ]);

        $document->amount_tier = $document->determineAmountTier();
        $document->requires_board_meeting = $document->needsBoardMeetingApproval();
        $document->save();

        $this->assertEquals('large', $document->amount_tier);
        $this->assertTrue($document->requires_board_meeting);

        // Cashier approves
        $document->status = FinanceDocument::STATUS_APPROVED_CASHIER;
        $document->cashier_approved_by_id = $this->cashier->id;
        $document->cashier_approved_at = now();
        $document->save();

        // Accountant approves
        $document->status = FinanceDocument::STATUS_APPROVED_ACCOUNTANT;
        $document->accountant_approved_by_id = $this->accountant->id;
        $document->accountant_approved_at = now();
        $document->save();

        // Chair approves
        $document->status = FinanceDocument::STATUS_APPROVED_CHAIR;
        $document->chair_approved_by_id = $this->chair->id;
        $document->chair_approved_at = now();
        $document->save();

        $this->assertFalse($document->isApprovalStageComplete()); // Still needs board meeting

        // Board meeting approval
        $document->board_meeting_approved_at = now();
        $document->board_meeting_approved_by_id = $this->boardMember->id;
        $document->save();

        $this->assertTrue($document->isApprovalStageComplete());
    }

    /** @test */
    public function requester_can_create_finance_document()
    {
        Storage::fake('local');

        $this->actingAs($this->requester);

        $file = UploadedFile::fake()->create('receipt.pdf', 100);

        $response = $this->post(route('admin.finance.store'), [
            'title' => 'Test Expense',
            'description' => 'Test description',
            'amount' => 5000,
            'request_type' => 'expense_reimbursement',
            'attachment' => $file,
        ]);

        $response->assertRedirect();
        $this->assertDatabaseHas('finance_documents', [
            'title' => 'Test Expense',
            'amount' => 5000,
            'submitted_by_id' => $this->requester->id,
        ]);
    }

    /** @test */
    public function cashier_cannot_approve_own_submission()
    {
        $document = FinanceDocument::create([
            'title' => 'Self Submitted',
            'description' => 'Test',
            'amount' => 1000,
            'request_type' => 'petty_cash',
            'status' => 'pending',
            'submitted_by_id' => $this->cashier->id,
            'submitted_at' => now(),
        ]);

        $this->assertFalse($document->canBeApprovedByCashier($this->cashier));
    }

    /** @test */
    public function accountant_cannot_approve_before_cashier()
    {
        $document = FinanceDocument::create([
            'title' => 'Pending Document',
            'description' => 'Test',
            'amount' => 1000,
            'request_type' => 'petty_cash',
            'status' => 'pending',
            'submitted_by_id' => $this->requester->id,
            'submitted_at' => now(),
        ]);

        $this->assertFalse($document->canBeApprovedByAccountant());
    }

    /** @test */
    public function rejected_document_cannot_proceed()
    {
        $document = FinanceDocument::create([
            'title' => 'Rejected Document',
            'description' => 'Test',
            'amount' => 1000,
            'request_type' => 'petty_cash',
            'status' => FinanceDocument::STATUS_REJECTED,
            'submitted_by_id' => $this->requester->id,
            'submitted_at' => now(),
        ]);

        $this->assertFalse($document->canBeApprovedByCashier($this->cashier));
        $this->assertFalse($document->canBeApprovedByAccountant());
        $this->assertFalse($document->canBeApprovedByChair());
    }

    /** @test */
    public function workflow_stages_are_correctly_identified()
    {
        $document = FinanceDocument::create([
            'title' => 'Test Document',
            'description' => 'Test',
            'amount' => 1000,
            'request_type' => 'petty_cash',
            'status' => 'pending',
            'submitted_by_id' => $this->requester->id,
            'submitted_at' => now(),
        ]);

        $document->amount_tier = 'small';
        $document->save();

        // Stage 1: Approval
        $this->assertEquals('approval', $document->getCurrentWorkflowStage());
        $this->assertFalse($document->isPaymentCompleted());
        $this->assertFalse($document->isRecordingComplete());

        // Complete approval
        $document->status = FinanceDocument::STATUS_APPROVED_ACCOUNTANT;
        $document->cashier_approved_at = now();
        $document->accountant_approved_at = now();
        $document->save();

        $this->assertTrue($document->isApprovalStageComplete());

        // Stage 2: Payment (simulate payment order created and executed)
        $document->payment_order_created_at = now();
        $document->payment_verified_at = now();
        $document->payment_executed_at = now();
        $document->save();

        $this->assertTrue($document->isPaymentCompleted());
        $this->assertEquals('payment', $document->getCurrentWorkflowStage());

        // Stage 3: Recording
        $document->cashier_recorded_at = now();
        $document->save();

        $this->assertTrue($document->isRecordingComplete());

        // Stage 4: Reconciliation
        $this->assertEquals('reconciliation', $document->getCurrentWorkflowStage());

        $document->bank_reconciliation_id = 1; // Simulate reconciliation
        $document->save();

        $this->assertTrue($document->isReconciled());
        $this->assertEquals('completed', $document->getCurrentWorkflowStage());
    }

    /** @test */
    public function amount_tier_is_automatically_determined()
    {
        $smallDoc = FinanceDocument::factory()->make(['amount' => 3000]);
        $this->assertEquals('small', $smallDoc->determineAmountTier());

        $mediumDoc = FinanceDocument::factory()->make(['amount' => 25000]);
        $this->assertEquals('medium', $mediumDoc->determineAmountTier());

        $largeDoc = FinanceDocument::factory()->make(['amount' => 75000]);
        $this->assertEquals('large', $largeDoc->determineAmountTier());
    }

    /** @test */
    public function board_meeting_requirement_is_correctly_identified()
    {
        $smallDoc = FinanceDocument::factory()->make(['amount' => 3000]);
        $this->assertFalse($smallDoc->needsBoardMeetingApproval());

        $mediumDoc = FinanceDocument::factory()->make(['amount' => 25000]);
        $this->assertFalse($mediumDoc->needsBoardMeetingApproval());

        $largeDoc = FinanceDocument::factory()->make(['amount' => 75000]);
        $this->assertTrue($largeDoc->needsBoardMeetingApproval());
    }
}