<?php

namespace Tests\Unit\EcommerceFinance;

use Modules\EcommerceFinance\Services\StoreReceivingBalanceOverviewService;
use PHPUnit\Framework\TestCase;

class StoreReceivingBalanceOverviewServiceTest extends TestCase
{
    public function test_overview_sums_all_eight_platforms_for_the_selected_month(): void
    {
        $seenPeriods = [];
        $service = $this->service(function (string $platform, string $start, string $end) use (&$seenPeriods): array {
            $seenPeriods[] = [$platform, $start, $end];
            $index = array_search($platform, array_column(StoreReceivingBalanceOverviewService::PLATFORMS, 'slug'), true) + 1;

            return [
                'opening_balance' => 100.10 * $index,
                'income' => 10.20 * $index,
                'expense' => 1.25 * $index,
            ];
        });

        $result = $service->overview('2026-10');

        $this->assertSame('2026-10', $result['month']);
        $this->assertSame(['start' => '2026-10-01', 'end' => '2026-10-31'], $result['period']);
        $this->assertCount(8, $result['platforms']);
        $this->assertCount(8, $seenPeriods);
        $this->assertSame('taobao-alipay', $seenPeriods[0][0]);
        $this->assertSame('xiaohongshu', $seenPeriods[7][0]);
        $this->assertSame(3603.60, $result['summary']['opening_balance']);
        $this->assertSame(367.20, $result['summary']['income']);
        $this->assertSame(45.00, $result['summary']['expense']);
        $this->assertSame(3925.80, $result['summary']['balance']);
        $this->assertTrue($result['summary']['complete']);
        $this->assertSame(8, $result['summary']['available_platform_count']);
    }

    public function test_overview_does_not_report_a_total_when_an_opening_balance_is_missing(): void
    {
        $service = $this->service(function (string $platform): array {
            return [
                'opening_balance' => $platform === 'vipshop-jx' ? null : 25.0,
                'income' => 5.0,
                'expense' => 2.0,
            ];
        });

        $result = $service->overview('2026-09');

        $this->assertFalse($result['summary']['complete']);
        $this->assertNull($result['summary']['opening_balance']);
        $this->assertNull($result['summary']['income']);
        $this->assertNull($result['summary']['expense']);
        $this->assertNull($result['summary']['balance']);
        $this->assertSame(7, $result['summary']['available_platform_count']);
        $vipshopJx = array_values(array_filter(
            $result['platforms'],
            static fn (array $platform): bool => $platform['slug'] === 'vipshop-jx',
        ))[0];
        $this->assertFalse($vipshopJx['available']);
    }

    public function test_overview_uses_an_explicit_date_range_for_all_platforms(): void
    {
        $seenPeriods = [];
        $service = $this->service(function (string $platform, string $start, string $end) use (&$seenPeriods): array {
            $seenPeriods[] = [$platform, $start, $end];

            return [
                'opening_balance' => 10.0,
                'income' => 2.0,
                'expense' => 1.0,
            ];
        });

        $result = $service->overview('2026-10-05', '2026-10-20');

        $this->assertSame(['start' => '2026-10-05', 'end' => '2026-10-20'], $result['period']);
        $this->assertCount(8, $seenPeriods);
        $this->assertSame(['taobao-alipay', '2026-10-05', '2026-10-20'], $seenPeriods[0]);
        $this->assertSame(['xiaohongshu', '2026-10-05', '2026-10-20'], $seenPeriods[7]);
        $this->assertTrue($result['summary']['complete']);
    }

    public function test_income_detail_groups_platform_store_and_bill_item_rows(): void
    {
        $service = new class extends StoreReceivingBalanceOverviewService {
            public function __construct()
            {
            }

            protected function fetchPlatformIncomeRows(string $platform, string $start, string $end): iterable
            {
                $index = array_search($platform, array_column(StoreReceivingBalanceOverviewService::PLATFORMS, 'slug'), true) + 1;

                yield [
                    'store_name' => '店铺-' . $index,
                    'bill_item' => '货款收入',
                    'income' => 100.10 * $index,
                ];
                yield [
                    'store_name' => '店铺-' . $index,
                    'bill_item' => '货款收入',
                    'income' => 0.20 * $index,
                ];
                yield [
                    'store_name' => '店铺-' . $index,
                    'bill_item' => '退款',
                    'income' => 0,
                ];
            }
        };

        $result = $service->incomeDetail('2026-10');

        $this->assertSame('2026-10', $result['month']);
        $this->assertSame(['start' => '2026-10-01', 'end' => '2026-10-31'], $result['period']);
        $this->assertCount(8, $result['details']);
        $this->assertSame([
            'platform_slug' => 'taobao-alipay',
            'platform' => '淘系支付宝账户',
            'store_name' => '店铺-1',
            'bill_item' => '货款收入',
            'amount' => 100.30,
        ], $result['details'][0]);
        $this->assertSame('xiaohongshu', $result['details'][7]['platform_slug']);
        $this->assertSame(3610.80, $result['summary']['income']);
        $this->assertTrue($result['summary']['complete']);
        $this->assertSame(8, $result['summary']['available_platform_count']);
    }

    public function test_expense_detail_groups_platform_store_and_bill_item_rows(): void
    {
        $service = new class extends StoreReceivingBalanceOverviewService {
            public function __construct()
            {
            }

            protected function fetchPlatformExpenseRows(string $platform, string $start, string $end): iterable
            {
                $index = array_search($platform, array_column(StoreReceivingBalanceOverviewService::PLATFORMS, 'slug'), true) + 1;

                yield [
                    'store_name' => '店铺-' . $index,
                    'bill_item' => '平台扣费',
                    'expense' => 20.10 * $index,
                ];
                yield [
                    'store_name' => '店铺-' . $index,
                    'bill_item' => '平台扣费',
                    'expense' => 0.20 * $index,
                ];
                yield [
                    'store_name' => '店铺-' . $index,
                    'bill_item' => '退款',
                    'expense' => 0,
                ];
            }
        };

        $result = $service->expenseDetail('2026-10');

        $this->assertSame('2026-10', $result['month']);
        $this->assertSame(['start' => '2026-10-01', 'end' => '2026-10-31'], $result['period']);
        $this->assertCount(8, $result['details']);
        $this->assertSame([
            'platform_slug' => 'taobao-alipay',
            'platform' => '淘系支付宝账户',
            'store_name' => '店铺-1',
            'bill_item' => '平台扣费',
            'amount' => 20.30,
        ], $result['details'][0]);
        $this->assertSame('xiaohongshu', $result['details'][7]['platform_slug']);
        $this->assertSame(730.80, $result['summary']['expense']);
        $this->assertArrayNotHasKey('income', $result['summary']);
        $this->assertTrue($result['summary']['complete']);
        $this->assertSame(8, $result['summary']['available_platform_count']);
    }

    public function test_balance_detail_uses_each_platform_closing_balance(): void
    {
        $service = $this->service(function (string $platform): array {
            $index = array_search($platform, array_column(StoreReceivingBalanceOverviewService::PLATFORMS, 'slug'), true) + 1;

            return [
                'opening_balance' => 100.10 * $index,
                'income' => 10.20 * $index,
                'expense' => 1.25 * $index,
            ];
        });

        $result = $service->balanceDetail('2026-10');

        $this->assertSame('2026-10', $result['month']);
        $this->assertSame(['start' => '2026-10-01', 'end' => '2026-10-31'], $result['period']);
        $this->assertCount(8, $result['details']);
        $this->assertSame([
            'platform_slug' => 'taobao-alipay',
            'platform' => '淘系支付宝账户',
            'store_name' => '',
            'bill_item' => '',
            'amount' => 109.05,
        ], $result['details'][0]);
        $this->assertSame('xiaohongshu', $result['details'][7]['platform_slug']);
        $this->assertSame(872.40, $result['details'][7]['amount']);
        $this->assertSame(3925.80, $result['summary']['balance']);
        $this->assertTrue($result['summary']['complete']);
        $this->assertSame(8, $result['summary']['available_platform_count']);
    }

    public function test_monthly_closing_returns_july_to_october_for_all_platforms(): void
    {
        $monthOrdinal = ['2026-07' => 1, '2026-08' => 2, '2026-09' => 3, '2026-10' => 4];
        $seenPeriods = [];
        $service = $this->service(function (string $platform, string $start, string $end) use (&$seenPeriods, $monthOrdinal): array {
            $seenPeriods[] = [$platform, $start, $end];
            $index = array_search($platform, array_column(StoreReceivingBalanceOverviewService::PLATFORMS, 'slug'), true) + 1;

            return [
                'opening_balance' => 1000.00 * $index,
                'income' => 10.00 * $monthOrdinal[substr($start, 0, 7)],
                'expense' => 0.0,
            ];
        });

        $result = $service->monthlyClosing();

        $this->assertCount(32, $seenPeriods);
        $this->assertSame(['2026-07', '2026-08', '2026-09', '2026-10'], array_column($result['months'], 'key'));
        $this->assertCount(8, $result['platforms']);
        $this->assertSame([
            '2026-07' => 1010.00,
            '2026-08' => 1020.00,
            '2026-09' => 1030.00,
            '2026-10' => 1040.00,
        ], $result['platforms'][0]['balances']);
        $this->assertSame([
            'amount' => 10.0,
            'rate' => 0.97,
        ], $result['platforms'][0]['change']);
        $this->assertSame('合计', $result['total']['name']);
        $this->assertTrue($result['summary']['complete']);
        $this->assertSame(8, $result['summary']['available_platform_count']);
    }

    private function service(callable $summary): StoreReceivingBalanceOverviewService
    {
        return new class($summary) extends StoreReceivingBalanceOverviewService {
            public function __construct(private $summaryCallback)
            {
            }

            protected function fetchPlatformSummary(string $platform, string $start, string $end): array
            {
                return ($this->summaryCallback)($platform, $start, $end);
            }
        };
    }
}