<?php

namespace Tests\Feature\EndToEnd;

use App\Models\BankReconciliation;
use App\Models\CashierLedgerEntry;
use App\Models\FinanceDocument;
use App\Models\PaymentOrder;
use App\Models\User;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\Mail;
use Illuminate\Support\Facades\Storage;
use Tests\TestCase;
use Tests\Traits\CreatesFinanceData;
use Tests\Traits\SeedsRolesAndPermissions;

/**
 * End-to-End Finance Workflow Tests
 *
 * Tests the complete 4-stage financial workflow:
 * Stage 1: Finance Document Approval (Cashier → Accountant → Chair → Board)
 * Stage 2: Payment Order (Creation → Verification → Execution)
 * Stage 3: Cashier Ledger Entry (Recording)
 * Stage 4: Bank Reconciliation (Preparation → Review → Approval)
 */
class FinanceWorkflowEndToEndTest extends TestCase
{
    use RefreshDatabase, SeedsRolesAndPermissions, CreatesFinanceData;

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

    protected function setUp(): void
    {
        parent::setUp();
        Storage::fake('local');
        Mail::fake();
        $this->seedRolesAndPermissions();

        $this->cashier = $this->createCashier(['email' => 'cashier@test.com']);
        $this->accountant = $this->createAccountant(['email' => 'accountant@test.com']);
        $this->chair = $this->createChair(['email' => 'chair@test.com']);
        $this->boardMember = $this->createBoardMember(['email' => 'board@test.com']);
    }

    /**
     * Test small amount (< 5000) complete workflow
     * Small amounts only require Cashier + Accountant approval
     */
    public function test_small_amount_complete_workflow(): void
    {
        // Create small amount document
        $document = $this->createSmallAmountDocument([
            'status' => FinanceDocument::STATUS_PENDING,
            'submitted_by_user_id' => User::factory()->create()->id,
        ]);

        $this->assertEquals(FinanceDocument::AMOUNT_TIER_SMALL, $document->determineAmountTier());

        // Cashier approves
        $this->actingAs($this->cashier)->post(
            route('admin.finance-documents.approve', $document)
        );
        $document->refresh();
        $this->assertEquals(FinanceDocument::STATUS_APPROVED_CASHIER, $document->status);

        // Accountant approves - should be fully approved for small amounts
        $this->actingAs($this->accountant)->post(
            route('admin.finance-documents.approve', $document)
        );
        $document->refresh();

        // Small amounts may be fully approved after accountant
        $this->assertTrue(
            $document->status === FinanceDocument::STATUS_APPROVED_ACCOUNTANT ||
            $document->status === FinanceDocument::STATUS_APPROVED_CHAIR
        );
    }

    /**
     * Test medium amount (5000 - 50000) complete workflow
     * Medium amounts require Cashier + Accountant + Chair approval
     */
    public function test_medium_amount_complete_workflow(): void
    {
        $document = $this->createMediumAmountDocument([
            'status' => FinanceDocument::STATUS_PENDING,
            'submitted_by_user_id' => User::factory()->create()->id,
        ]);

        $this->assertEquals(FinanceDocument::AMOUNT_TIER_MEDIUM, $document->determineAmountTier());

        // Stage 1: Cashier approves
        $this->actingAs($this->cashier)->post(
            route('admin.finance-documents.approve', $document)
        );
        $document->refresh();
        $this->assertEquals(FinanceDocument::STATUS_APPROVED_CASHIER, $document->status);

        // Stage 2: Accountant approves
        $this->actingAs($this->accountant)->post(
            route('admin.finance-documents.approve', $document)
        );
        $document->refresh();
        $this->assertEquals(FinanceDocument::STATUS_APPROVED_ACCOUNTANT, $document->status);

        // Stage 3: Chair approves - final approval
        $this->actingAs($this->chair)->post(
            route('admin.finance-documents.approve', $document)
        );
        $document->refresh();
        $this->assertEquals(FinanceDocument::STATUS_APPROVED_CHAIR, $document->status);
    }

    /**
     * Test large amount (> 50000) complete workflow with board approval
     */
    public function test_large_amount_complete_workflow_with_board_approval(): void
    {
        $document = $this->createLargeAmountDocument([
            'status' => FinanceDocument::STATUS_PENDING,
            'submitted_by_user_id' => User::factory()->create()->id,
        ]);

        $this->assertEquals(FinanceDocument::AMOUNT_TIER_LARGE, $document->determineAmountTier());

        // Approval sequence: Cashier → Accountant → Chair → Board
        $this->actingAs($this->cashier)->post(
            route('admin.finance-documents.approve', $document)
        );
        $document->refresh();

        $this->actingAs($this->accountant)->post(
            route('admin.finance-documents.approve', $document)
        );
        $document->refresh();

        $this->actingAs($this->chair)->post(
            route('admin.finance-documents.approve', $document)
        );
        $document->refresh();

        // For large amounts, may need board approval
        if ($document->requiresBoardApproval()) {
            $this->actingAs($this->boardMember)->post(
                route('admin.finance-documents.approve', $document)
            );
            $document->refresh();
            $this->assertEquals(FinanceDocument::STATUS_APPROVED_BOARD, $document->status);
        }
    }

    /**
     * Test finance document to payment order to execution flow
     */
    public function test_finance_document_to_payment_order_to_execution(): void
    {
        // Create approved document
        $document = $this->createDocumentAtStage('chair_approved', [
            'amount' => 10000,
            'payee_name' => 'Test Vendor',
        ]);

        // Stage 2: Accountant creates payment order
        $response = $this->actingAs($this->accountant)->post(
            route('admin.payment-orders.store'),
            [
                'finance_document_id' => $document->id,
                'payment_method' => 'bank_transfer',
                'bank_name' => 'Test Bank',
                'account_number' => '1234567890',
                'account_name' => 'Test Vendor',
                'notes' => 'Payment for approved document',
            ]
        );

        $paymentOrder = PaymentOrder::where('finance_document_id', $document->id)->first();
        $this->assertNotNull($paymentOrder);
        $this->assertEquals(PaymentOrder::STATUS_PENDING_VERIFICATION, $paymentOrder->status);

        // Cashier verifies payment order
        $this->actingAs($this->cashier)->post(
            route('admin.payment-orders.verify', $paymentOrder)
        );
        $paymentOrder->refresh();
        $this->assertEquals(PaymentOrder::STATUS_VERIFIED, $paymentOrder->status);

        // Cashier executes payment
        $this->actingAs($this->cashier)->post(
            route('admin.payment-orders.execute', $paymentOrder),
            ['execution_notes' => 'Payment executed via bank transfer']
        );
        $paymentOrder->refresh();
        $this->assertEquals(PaymentOrder::STATUS_EXECUTED, $paymentOrder->status);
        $this->assertNotNull($paymentOrder->executed_at);
    }

    /**
     * Test payment order to cashier ledger entry flow
     */
    public function test_payment_order_to_cashier_ledger_entry(): void
    {
        // Create executed payment order
        $paymentOrder = $this->createPaymentOrderAtStage('executed', [
            'amount' => 5000,
        ]);

        // Cashier records ledger entry
        $response = $this->actingAs($this->cashier)->post(
            route('admin.cashier-ledger.store'),
            [
                'finance_document_id' => $paymentOrder->finance_document_id,
                'entry_type' => 'payment',
                'entry_date' => now()->format('Y-m-d'),
                'amount' => 5000,
                'payment_method' => 'bank_transfer',
                'bank_account' => 'Main Operating Account',
                'notes' => 'Payment for invoice #123',
            ]
        );

        $response->assertRedirect();

        $ledgerEntry = CashierLedgerEntry::where('finance_document_id', $paymentOrder->finance_document_id)->first();
        $this->assertNotNull($ledgerEntry);
        $this->assertEquals('payment', $ledgerEntry->entry_type);
        $this->assertEquals(5000, $ledgerEntry->amount);
        $this->assertEquals($this->cashier->id, $ledgerEntry->recorded_by_cashier_id);
    }

    /**
     * Test cashier ledger to bank reconciliation flow
     */
    public function test_cashier_ledger_to_bank_reconciliation(): void
    {
        // Create ledger entries
        $this->createReceiptEntry(100000, 'Main Account', [
            'recorded_by_cashier_id' => $this->cashier->id,
        ]);
        $this->createPaymentEntry(30000, 'Main Account', [
            'recorded_by_cashier_id' => $this->cashier->id,
        ]);

        // Current balance should be 70000
        $balance = CashierLedgerEntry::getLatestBalance('Main Account');
        $this->assertEquals(70000, $balance);

        // Create bank reconciliation
        $response = $this->actingAs($this->cashier)->post(
            route('admin.bank-reconciliations.store'),
            [
                'reconciliation_month' => now()->format('Y-m'),
                'bank_statement_date' => now()->format('Y-m-d'),
                'bank_statement_balance' => 70000,
                'system_book_balance' => 70000,
                'outstanding_checks' => [],
                'deposits_in_transit' => [],
                'bank_charges' => [],
                'notes' => 'Monthly reconciliation',
            ]
        );

        $reconciliation = BankReconciliation::latest()->first();
        $this->assertNotNull($reconciliation);
        $this->assertEquals(0, $reconciliation->discrepancy_amount);
        $this->assertFalse($reconciliation->hasDiscrepancy());
    }

    /**
     * Test complete 4-stage financial workflow
     */
    public function test_complete_4_stage_financial_workflow(): void
    {
        $submitter = User::factory()->create();

        // Stage 1: Create and approve finance document
        $document = FinanceDocument::factory()->create([
            'title' => 'Complete Workflow Test',
            'amount' => 25000,
            'status' => FinanceDocument::STATUS_PENDING,
            'submitted_by_user_id' => $submitter->id,
            'request_type' => FinanceDocument::TYPE_EXPENSE_REIMBURSEMENT,
        ]);

        // Approve through all stages
        $this->actingAs($this->cashier)->post(route('admin.finance-documents.approve', $document));
        $document->refresh();

        $this->actingAs($this->accountant)->post(route('admin.finance-documents.approve', $document));
        $document->refresh();

        $this->actingAs($this->chair)->post(route('admin.finance-documents.approve', $document));
        $document->refresh();

        $this->assertEquals(FinanceDocument::STATUS_APPROVED_CHAIR, $document->status);

        // Stage 2: Create and execute payment order
        $this->actingAs($this->accountant)->post(route('admin.payment-orders.store'), [
            'finance_document_id' => $document->id,
            'payment_method' => 'bank_transfer',
            'bank_name' => 'Test Bank',
            'account_number' => '9876543210',
            'account_name' => 'Submitter Name',
        ]);

        $paymentOrder = PaymentOrder::where('finance_document_id', $document->id)->first();
        $this->assertNotNull($paymentOrder);

        $this->actingAs($this->cashier)->post(route('admin.payment-orders.verify', $paymentOrder));
        $paymentOrder->refresh();

        $this->actingAs($this->cashier)->post(route('admin.payment-orders.execute', $paymentOrder));
        $paymentOrder->refresh();

        $this->assertEquals(PaymentOrder::STATUS_EXECUTED, $paymentOrder->status);

        // Stage 3: Record ledger entry
        $this->actingAs($this->cashier)->post(route('admin.cashier-ledger.store'), [
            'finance_document_id' => $document->id,
            'entry_type' => 'payment',
            'entry_date' => now()->format('Y-m-d'),
            'amount' => 25000,
            'payment_method' => 'bank_transfer',
            'bank_account' => 'Operating Account',
        ]);

        $ledgerEntry = CashierLedgerEntry::where('finance_document_id', $document->id)->first();
        $this->assertNotNull($ledgerEntry);

        // Stage 4: Bank reconciliation
        $this->actingAs($this->cashier)->post(route('admin.bank-reconciliations.store'), [
            'reconciliation_month' => now()->format('Y-m'),
            'bank_statement_date' => now()->format('Y-m-d'),
            'bank_statement_balance' => 75000,
            'system_book_balance' => 75000,
            'outstanding_checks' => [],
            'deposits_in_transit' => [],
            'bank_charges' => [],
        ]);

        $reconciliation = BankReconciliation::latest()->first();

        // Accountant reviews
        $this->actingAs($this->accountant)->post(
            route('admin.bank-reconciliations.review', $reconciliation),
            ['review_notes' => 'Reviewed and verified']
        );
        $reconciliation->refresh();
        $this->assertNotNull($reconciliation->reviewed_at);

        // Manager/Chair approves
        $this->actingAs($this->chair)->post(
            route('admin.bank-reconciliations.approve', $reconciliation),
            ['approval_notes' => 'Approved']
        );
        $reconciliation->refresh();

        $this->assertEquals('completed', $reconciliation->reconciliation_status);
        $this->assertTrue($reconciliation->isCompleted());
    }

    /**
     * Test rejection at each approval stage
     */
    public function test_rejection_at_each_approval_stage(): void
    {
        // Test rejection at cashier stage
        $doc1 = $this->createFinanceDocument(['status' => FinanceDocument::STATUS_PENDING]);
        $this->actingAs($this->cashier)->post(
            route('admin.finance-documents.reject', $doc1),
            ['rejection_reason' => 'Missing documentation']
        );
        $doc1->refresh();
        $this->assertEquals(FinanceDocument::STATUS_REJECTED, $doc1->status);

        // Test rejection at accountant stage
        $doc2 = $this->createDocumentAtStage('cashier_approved');
        $this->actingAs($this->accountant)->post(
            route('admin.finance-documents.reject', $doc2),
            ['rejection_reason' => 'Amount exceeds policy limit']
        );
        $doc2->refresh();
        $this->assertEquals(FinanceDocument::STATUS_REJECTED, $doc2->status);

        // Test rejection at chair stage
        $doc3 = $this->createDocumentAtStage('accountant_approved');
        $this->actingAs($this->chair)->post(
            route('admin.finance-documents.reject', $doc3),
            ['rejection_reason' => 'Not within budget allocation']
        );
        $doc3->refresh();
        $this->assertEquals(FinanceDocument::STATUS_REJECTED, $doc3->status);
    }

    /**
     * Test workflow with different payment methods
     */
    public function test_workflow_with_different_payment_methods(): void
    {
        $paymentMethods = ['cash', 'bank_transfer', 'check'];

        foreach ($paymentMethods as $method) {
            $document = $this->createDocumentAtStage('chair_approved', [
                'amount' => 5000,
            ]);

            $this->actingAs($this->accountant)->post(route('admin.payment-orders.store'), [
                'finance_document_id' => $document->id,
                'payment_method' => $method,
                'bank_name' => $method === 'bank_transfer' ? 'Test Bank' : null,
                'account_number' => $method === 'bank_transfer' ? '1234567890' : null,
                'check_number' => $method === 'check' ? 'CHK001' : null,
            ]);

            $paymentOrder = PaymentOrder::where('finance_document_id', $document->id)->first();
            $this->assertNotNull($paymentOrder);
            $this->assertEquals($method, $paymentOrder->payment_method);
        }
    }

    /**
     * Test budget integration with finance documents
     */
    public function test_budget_integration_with_finance_documents(): void
    {
        $budget = $this->createBudgetWithItems(3, [
            'status' => 'active',
            'fiscal_year' => now()->year,
        ]);

        $budgetItem = $budget->items->first();

        $document = FinanceDocument::factory()->create([
            'amount' => 10000,
            'budget_item_id' => $budgetItem->id,
            'status' => FinanceDocument::STATUS_PENDING,
        ]);

        $this->assertEquals($budgetItem->id, $document->budget_item_id);

        // Approve through workflow
        $this->actingAs($this->cashier)->post(route('admin.finance-documents.approve', $document));
        $this->actingAs($this->accountant)->post(route('admin.finance-documents.approve', $document->fresh()));
        $this->actingAs($this->chair)->post(route('admin.finance-documents.approve', $document->fresh()));

        $document->refresh();
        $this->assertEquals(FinanceDocument::STATUS_APPROVED_CHAIR, $document->status);
    }
}