<?php

namespace Tests\Unit\EcommerceFinance;

use Illuminate\Support\Carbon;
use Modules\EcommerceFinance\Services\DingProcessPaymentLineAllocator;
use Tests\TestCase;

class DingProcessPaymentLineAllocatorTest extends TestCase
{
    public function test_it_splits_a_multi_line_payment_across_referenced_details(): void
    {
        $rows = (new DingProcessPaymentLineAllocator())->allocate(
            [
                ['business_id' => 'approval-2', 'line_no' => 1, 'amount' => '100.00'],
                ['business_id' => 'approval-2', 'line_no' => 2, 'amount' => '200.00'],
            ],
            [[
                'business_id' => 'approval-2',
                'process_instance_id' => 'process-2',
                'payment_no' => 1,
                'sequence_spec' => '1-2',
                'amount' => '300.00',
                'paid_at' => '2026-10-15 00:00',
            ]],
            'personal_permission',
            Carbon::parse('2026-11-02 12:00:00'),
        );

        $this->assertSame(
            [[1, 100.0], [2, 200.0]],
            array_map(
                static fn (array $row): array => [
                    (int) $row['line_no'],
                    (float) $row['amount'],
                ],
                $rows,
            ),
        );
    }

    public function test_it_allocates_partial_payments_to_the_correct_months(): void
    {
        Carbon::setTestNow('2026-11-02 12:00:00');

        try {
            $rows = (new DingProcessPaymentLineAllocator())->allocate(
                [
                    ['business_id' => 'approval-1', 'line_no' => 1, 'amount' => '100.00'],
                    ['business_id' => 'approval-1', 'line_no' => 2, 'amount' => '50.00'],
                ],
                [
                    [
                        'business_id' => 'approval-1',
                        'process_instance_id' => 'process-1',
                        'payment_no' => 1,
                        'sequence_spec' => '1',
                        'amount' => '40.00',
                        'paid_at' => '2026-09-30 00:00',
                    ],
                    [
                        'business_id' => 'approval-1',
                        'process_instance_id' => 'process-1',
                        'payment_no' => 2,
                        'sequence_spec' => '1',
                        'amount' => '60.00',
                        'paid_at' => '2026-10-15 00:00',
                    ],
                    [
                        'business_id' => 'approval-1',
                        'process_instance_id' => 'process-1',
                        'payment_no' => 3,
                        'sequence_spec' => '2',
                        'amount' => '50.00',
                        'paid_at' => '2026-10-20 00:00',
                    ],
                ],
                'personal_permission',
                Carbon::parse('2026-11-02 12:00:00'),
            );

            $this->assertSame(
                [
                    ['2026-09', '1', 40.0],
                    ['2026-10', '1', 60.0],
                    ['2026-10', '2', 50.0],
                ],
                array_map(
                    static fn (array $row): array => [
                        $row['paid_month'],
                        (string) $row['line_no'],
                        (float) $row['amount'],
                    ],
                    $rows,
                ),
            );
        } finally {
            Carbon::setTestNow();
        }
    }

    public function test_it_allocates_an_invalid_sequence_to_the_unique_matching_detail(): void
    {
        $rows = (new DingProcessPaymentLineAllocator())->allocate(
            [
                ['business_id' => 'approval-3', 'line_no' => 1, 'amount' => '100.00'],
                ['business_id' => 'approval-3', 'line_no' => 2, 'amount' => '200.00'],
            ],
            [[
                'business_id' => 'approval-3',
                'process_instance_id' => 'process-3',
                'payment_no' => 1,
                'sequence_spec' => '9',
                'amount' => '200.00',
                'paid_at' => '2026-10-15 00:00',
            ]],
            'personal_permission',
            Carbon::parse('2026-11-02 12:00:00'),
        );

        $this->assertSame(
            [[2, 200.0]],
            array_map(
                static fn (array $row): array => [
                    (int) $row['line_no'],
                    (float) $row['amount'],
                ],
                $rows,
            ),
        );
    }

    public function test_it_allocates_a_payment_without_a_sequence_across_all_details(): void
    {
        $rows = (new DingProcessPaymentLineAllocator())->allocate(
            [
                ['business_id' => 'approval-4', 'line_no' => 1, 'amount' => '100.00'],
                ['business_id' => 'approval-4', 'line_no' => 2, 'amount' => '200.00'],
            ],
            [[
                'business_id' => 'approval-4',
                'process_instance_id' => 'process-4',
                'payment_no' => 1,
                'sequence_spec' => '',
                'amount' => '300.00',
                'paid_at' => '2026-10-15 00:00',
            ]],
            'personal_permission',
            Carbon::parse('2026-11-02 12:00:00'),
        );

        $this->assertSame(
            [[1, 100.0], [2, 200.0]],
            array_map(
                static fn (array $row): array => [
                    (int) $row['line_no'],
                    (float) $row['amount'],
                ],
                $rows,
            ),
        );
    }

    public function test_it_does_not_drop_a_payment_when_the_sequence_and_amount_do_not_match(): void
    {
        $rows = (new DingProcessPaymentLineAllocator())->allocate(
            [
                ['business_id' => 'approval-5', 'line_no' => 1, 'amount' => '100.00'],
                ['business_id' => 'approval-5', 'line_no' => 2, 'amount' => '200.00'],
            ],
            [[
                'business_id' => 'approval-5',
                'process_instance_id' => 'process-5',
                'payment_no' => 1,
                'sequence_spec' => '9',
                'amount' => '150.00',
                'paid_at' => '2026-10-15 00:00',
            ]],
            'personal_permission',
            Carbon::parse('2026-11-02 12:00:00'),
        );

        $this->assertSame(
            [[1, 50.0], [2, 100.0]],
            array_map(
                static fn (array $row): array => [
                    (int) $row['line_no'],
                    (float) $row['amount'],
                ],
                $rows,
            ),
        );
        $this->assertSame(150.0, array_sum(array_column($rows, 'amount')));
    }
}