<?php

namespace Tests\Unit\Services\Billing;

use App\Models\AdditionalCharge;
use App\Models\EventCharges;
use App\Services\Billing\ChargeService;
use App\Services\ExtraCharges\ExtraChargesChargeService;
use App\Services\ExtraCharges\ExtraChargesContextService;
use App\Services\ExtraCharges\ExtraChargesInvoiceService;
use App\Services\Invoices\InvoiceGenerationService;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\DB;
use Mockery;
use Tests\TestCase;

class ChargeServiceTest extends TestCase
{
    use RefreshDatabase;

    protected function tearDown(): void
    {
        Mockery::close();
        parent::tearDown();
    }

    public function test_create_extra_charge_blocks_duplicate(): void
    {
        $this->seedConfig();

        DB::table('additional_charges')->insert([
            'parent_id' => 10,
            'school_year' => '2025-2026',
            'semester' => 'Fall',
            'charge_type' => 'add',
            'title' => 'Books',
            'amount' => 25.00,
            'status' => 'pending',
        ]);

        $service = $this->makeService();
        $result = $service->createExtraCharge([
            'parent_id' => 10,
            'title' => 'Books',
            'amount' => 25,
            'charge_type' => 'add',
        ]);

        $this->assertFalse($result['ok']);
        $this->assertSame('duplicate_charge', $result['error']);
    }

    public function test_create_event_charge_blocks_duplicate(): void
    {
        $this->seedConfig();

        DB::table('event_charges')->insert([
            'parent_id' => 10,
            'student_id' => 1,
            'event_name' => 'Field Trip',
            'participation' => 'yes',
            'charged' => 25.00,
            'amount' => 25.00,
            'school_year' => '2025-2026',
            'semester' => 'Fall',
        ]);

        $service = $this->makeService();
        $result = $service->createEventCharge([
            'parent_id' => 10,
            'student_id' => 1,
            'event_name' => 'Field Trip',
            'amount' => 25,
        ]);

        $this->assertFalse($result['ok']);
        $this->assertSame('duplicate_charge', $result['error']);
    }

    public function test_create_event_charge_succeeds(): void
    {
        $this->seedConfig();

        $service = $this->makeService();
        $result = $service->createEventCharge([
            'parent_id' => 10,
            'student_id' => 1,
            'event_name' => 'Camp',
            'amount' => 40,
            'created_by' => 1,
        ]);

        $this->assertTrue($result['ok']);
        $this->assertDatabaseHas('event_charges', [
            'parent_id' => 10,
            'student_id' => 1,
            'event_name' => 'Camp',
            'participation' => 'yes',
        ]);
    }

    public function test_cancel_event_charge_zeros_charge_and_creates_credit(): void
    {
        $this->seedConfig();

        $chargeId = DB::table('event_charges')->insertGetId([
            'parent_id' => 10,
            'student_id' => 1,
            'event_name' => 'Trip',
            'participation' => 'yes',
            'charged' => 30.00,
            'amount' => 30.00,
            'school_year' => '2025-2026',
            'semester' => 'Fall',
        ]);

        $service = $this->makeService();
        $result = $service->cancelEventCharge((int) $chargeId, true);

        $this->assertTrue($result['ok']);
        $this->assertSame('canceled', $result['cancellation_status']);

        $charge = EventCharges::query()->find($chargeId);
        $this->assertSame('no', $charge->participation);
        $this->assertSame(0.0, (float) $charge->charged);

        $this->assertDatabaseHas('additional_charges', [
            'parent_id' => 10,
            'charge_type' => 'deduct',
            'status' => 'pending',
        ]);
    }

    public function test_apply_extra_charge_marks_applied(): void
    {
        $this->seedConfig();

        $invoiceId = DB::table('invoices')->insertGetId([
            'parent_id' => 10,
            'invoice_number' => 'INV-10',
            'total_amount' => 100.00,
            'balance' => 100.00,
            'paid_amount' => 0.00,
            'issue_date' => '2025-01-01',
            'school_year' => '2025-2026',
            'semester' => 'Fall',
        ]);

        $chargeId = DB::table('additional_charges')->insertGetId([
            'parent_id' => 10,
            'school_year' => '2025-2026',
            'semester' => 'Fall',
            'charge_type' => 'add',
            'title' => 'Lab fee',
            'amount' => 15.00,
            'status' => 'pending',
        ]);

        $service = $this->makeService();
        $result = $service->applyExtraCharge((int) $chargeId, (int) $invoiceId);

        $this->assertTrue($result['ok']);
        $charge = AdditionalCharge::query()->find($chargeId);
        $this->assertSame('applied', $charge->status);
        $this->assertSame($invoiceId, (int) $charge->invoice_id);
    }

    public function test_list_for_parent_returns_both_charge_types(): void
    {
        $this->seedConfig();

        DB::table('additional_charges')->insert([
            'parent_id' => 10,
            'school_year' => '2025-2026',
            'semester' => 'Fall',
            'charge_type' => 'add',
            'title' => 'Uniform',
            'amount' => 20.00,
            'status' => 'pending',
        ]);

        DB::table('events')->insert([
            'id' => 1,
            'event_name' => 'Trip',
            'amount' => 25.00,
            'expiration_date' => '2025-06-01',
        ]);

        DB::table('event_charges')->insert([
            'event_id' => 1,
            'parent_id' => 10,
            'student_id' => 1,
            'participation' => 'yes',
            'charged' => 25.00,
            'school_year' => '2025-2026',
            'semester' => 'Fall',
        ]);

        $service = $this->makeService();
        $list = $service->listForParent(10, '2025-2026');

        $this->assertCount(1, $list['extra_charges']);
        $this->assertCount(1, $list['event_charges']);
        $this->assertSame('extra', $list['extra_charges'][0]['charge_type']);
        $this->assertSame('event', $list['event_charges'][0]['charge_type']);
    }

    private function makeService(): ChargeService
    {
        $invoiceGen = Mockery::mock(InvoiceGenerationService::class);
        $invoiceGen->shouldReceive('generateInvoice')->andReturn(['ok' => true]);

        return new ChargeService(
            app(ExtraChargesChargeService::class),
            app(ExtraChargesInvoiceService::class),
            app(ExtraChargesContextService::class),
            $invoiceGen
        );
    }

    private function seedConfig(): void
    {
        DB::table('configuration')->insert([
            ['config_key' => 'school_year', 'config_value' => '2025-2026'],
            ['config_key' => 'semester', 'config_value' => 'Fall'],
        ]);
    }
}