<?php

namespace Tests\Unit;

use App\Models\FinanceDocument;
use App\Models\User;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

/**
 * Finance Document Model Unit Tests
 *
 * Tests business logic methods in FinanceDocument model
 * Using new workflow: Secretary → Chair → Board
 */
class FinanceDocumentTest extends TestCase
{
    use RefreshDatabase;

    /** @test */
    public function it_determines_small_amount_tier_correctly()
    {
        $document = new FinanceDocument(['amount' => 4999]);
        $this->assertEquals('small', $document->determineAmountTier());

        $document->amount = 3000;
        $this->assertEquals('small', $document->determineAmountTier());

        $document->amount = 1;
        $this->assertEquals('small', $document->determineAmountTier());
    }

    /** @test */
    public function it_determines_medium_amount_tier_correctly()
    {
        $document = new FinanceDocument(['amount' => 5000]);
        $this->assertEquals('medium', $document->determineAmountTier());

        $document->amount = 25000;
        $this->assertEquals('medium', $document->determineAmountTier());

        $document->amount = 50000;
        $this->assertEquals('medium', $document->determineAmountTier());
    }

    /** @test */
    public function it_determines_large_amount_tier_correctly()
    {
        $document = new FinanceDocument(['amount' => 50001]);
        $this->assertEquals('large', $document->determineAmountTier());

        $document->amount = 100000;
        $this->assertEquals('large', $document->determineAmountTier());

        $document->amount = 1000000;
        $this->assertEquals('large', $document->determineAmountTier());
    }

    /** @test */
    public function small_amount_does_not_need_board_meeting()
    {
        $document = new FinanceDocument(['amount' => 4999]);
        $this->assertFalse($document->needsBoardMeetingApproval());
    }

    /** @test */
    public function medium_amount_does_not_need_board_meeting()
    {
        $document = new FinanceDocument(['amount' => 50000]);
        $this->assertFalse($document->needsBoardMeetingApproval());
    }

    /** @test */
    public function large_amount_needs_board_meeting()
    {
        $document = new FinanceDocument(['amount' => 50001]);
        $this->assertTrue($document->needsBoardMeetingApproval());
    }

    /** @test */
    public function small_amount_approval_stage_is_complete_after_secretary()
    {
        $document = new FinanceDocument([
            'amount' => 3000,
            'amount_tier' => 'small',
            'status' => FinanceDocument::STATUS_APPROVED_SECRETARY,
        ]);

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

    /** @test */
    public function medium_amount_approval_stage_needs_chair()
    {
        $document = new FinanceDocument([
            'amount' => 25000,
            'amount_tier' => 'medium',
            'status' => FinanceDocument::STATUS_APPROVED_SECRETARY,
        ]);

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

        $document->status = FinanceDocument::STATUS_APPROVED_CHAIR;
        $this->assertTrue($document->isApprovalComplete());
    }

    /** @test */
    public function large_amount_approval_stage_needs_chair_and_board()
    {
        $document = new FinanceDocument([
            'amount' => 75000,
            'amount_tier' => 'large',
            'status' => FinanceDocument::STATUS_APPROVED_CHAIR,
        ]);

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

        $document->status = FinanceDocument::STATUS_APPROVED_BOARD;
        $this->assertTrue($document->isApprovalComplete());
    }

    /** @test */
    public function secretary_cannot_approve_own_submission()
    {
        $user = User::factory()->create();

        $document = new FinanceDocument([
            'submitted_by_user_id' => $user->id,
            'status' => FinanceDocument::STATUS_PENDING,
        ]);

        $this->assertFalse($document->canBeApprovedBySecretary($user));
    }

    /** @test */
    public function secretary_can_approve_others_submission()
    {
        $submitter = User::factory()->create();
        $secretary = User::factory()->create();

        $document = new FinanceDocument([
            'submitted_by_user_id' => $submitter->id,
            'status' => FinanceDocument::STATUS_PENDING,
        ]);

        $this->assertTrue($document->canBeApprovedBySecretary($secretary));
    }

    /** @test */
    public function chair_cannot_approve_before_secretary()
    {
        $document = new FinanceDocument([
            'status' => FinanceDocument::STATUS_PENDING,
            'amount_tier' => 'medium',
        ]);

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

    /** @test */
    public function chair_can_approve_after_secretary()
    {
        $document = new FinanceDocument([
            'status' => FinanceDocument::STATUS_APPROVED_SECRETARY,
            'amount_tier' => 'medium',
        ]);

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

    /** @test */
    public function chair_can_approve_after_secretary_for_medium_amounts()
    {
        $document = new FinanceDocument([
            'status' => FinanceDocument::STATUS_APPROVED_SECRETARY,
            'amount_tier' => 'medium',
        ]);

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

    /** @test */
    public function payment_order_can_be_created_after_approval_stage()
    {
        $document = new FinanceDocument([
            'amount' => 3000,
            'amount_tier' => 'small',
            'status' => FinanceDocument::STATUS_APPROVED_SECRETARY,
        ]);

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

    /** @test */
    public function payment_order_cannot_be_created_before_approval_complete()
    {
        $document = new FinanceDocument([
            'status' => FinanceDocument::STATUS_PENDING,
            'amount_tier' => 'small',
        ]);

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

    /** @test */
    public function disbursement_requires_dual_confirmation()
    {
        $document = new FinanceDocument([
            'amount' => 3000,
            'amount_tier' => 'small',
            'status' => FinanceDocument::STATUS_APPROVED_SECRETARY,
        ]);

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

        // Only requester confirmed
        $document->requester_confirmed_at = now();
        $this->assertFalse($document->isDisbursementComplete());

        // Both confirmed
        $document->cashier_confirmed_at = now();
        $this->assertTrue($document->isDisbursementComplete());
    }

    /** @test */
    public function payment_completed_check_works()
    {
        $document = new FinanceDocument([
            'payment_order_created_at' => now(),
            'payment_verified_at' => now(),
            'payment_executed_at' => null,
        ]);

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

        $document->payment_executed_at = now();
        $this->assertTrue($document->isPaymentCompleted());
    }

    /** @test */
    public function recording_complete_check_works()
    {
        $document = new FinanceDocument([
            'accountant_recorded_at' => null,
        ]);

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

        $document->accountant_recorded_at = now();
        $this->assertTrue($document->isRecordingComplete());
    }

    /** @test */
    public function reconciled_check_works()
    {
        $document = new FinanceDocument([
            'bank_reconciliation_id' => null,
        ]);

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

        $document->bank_reconciliation_id = 1;
        $this->assertTrue($document->isReconciled());
    }

    /** @test */
    public function amount_tier_text_is_correct()
    {
        $small = new FinanceDocument(['amount_tier' => 'small']);
        $this->assertEquals('小額（< 5000）', $small->getAmountTierText());

        $medium = new FinanceDocument(['amount_tier' => 'medium']);
        $this->assertEquals('中額（5000-50000）', $medium->getAmountTierText());

        $large = new FinanceDocument(['amount_tier' => 'large']);
        $this->assertEquals('大額（> 50000）', $large->getAmountTierText());
    }

    /** @test */
    public function fully_processed_check_works()
    {
        $document = new FinanceDocument([
            'amount' => 3000,
            'amount_tier' => 'small',
            'status' => FinanceDocument::STATUS_APPROVED_SECRETARY,
        ]);

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

        // Complete disbursement
        $document->requester_confirmed_at = now();
        $document->cashier_confirmed_at = now();
        $this->assertFalse($document->isFullyProcessed());

        // Complete recording
        $document->accountant_recorded_at = now();
        $this->assertTrue($document->isFullyProcessed());
    }
}