<?php

namespace App\Module\Transfer\Tests\Unit;

use App\Module\Transfer\Validators\AmountValidator;
use Tests\TestCase;

/**
 * 金额验证器单元测试
 */
class AmountValidatorTest extends TestCase
{
    /**
     * 测试有效金额
     */
    public function test_valid_amounts()
    {
        $validAmounts = [
            '1.0000000000',
            '100.5000000000',
            '0.0000000001',
            '999999999.9999999999',
            '123.456789',
            '1000',
            '0.1',
        ];

        foreach ($validAmounts as $amount) {
            $validator = new AmountValidator($amount);
            $this->assertTrue($validator->validate(), "金额 {$amount} 应该是有效的");
        }
    }

    /**
     * 测试无效金额
     */
    public function test_invalid_amounts()
    {
        $invalidAmounts = [
            '',           // 空值
            '0',          // 零值
            '-100',       // 负数
            'abc',        // 非数字
            '1.23.45',    // 多个小数点
            '1e10',       // 科学计数法
            '1000000000000', // 超过最大值
        ];

        foreach ($invalidAmounts as $amount) {
            $validator = new AmountValidator($amount);
            $this->assertFalse($validator->validate(), "金额 {$amount} 应该是无效的");
        }
    }

    /**
     * 测试小数位数限制
     */
    public function test_decimal_places_limit()
    {
        // 测试超过10位小数的金额
        $validator = new AmountValidator('1.12345678901', 10);
        $this->assertFalse($validator->validate());

        // 测试正好10位小数的金额
        $validator = new AmountValidator('1.1234567890', 10);
        $this->assertTrue($validator->validate());

        // 测试少于10位小数的金额
        $validator = new AmountValidator('1.123456789', 10);
        $this->assertTrue($validator->validate());
    }

    /**
     * 测试自定义范围
     */
    public function test_custom_range()
    {
        $minAmount = '10.0000000000';
        $maxAmount = '1000.0000000000';

        // 测试范围内的金额
        $validator = new AmountValidator('100.0000000000', 10, $minAmount, $maxAmount);
        $this->assertTrue($validator->validate());

        // 测试小于最小值的金额
        $validator = new AmountValidator('5.0000000000', 10, $minAmount, $maxAmount);
        $this->assertFalse($validator->validate());

        // 测试大于最大值的金额
        $validator = new AmountValidator('2000.0000000000', 10, $minAmount, $maxAmount);
        $this->assertFalse($validator->validate());
    }

    /**
     * 测试金额格式化
     */
    public function test_amount_formatting()
    {
        $validator = new AmountValidator('100.1000000000');
        $this->assertEquals('100.1', $validator->format());

        $validator = new AmountValidator('100.0000000000');
        $this->assertEquals('100', $validator->format());

        $validator = new AmountValidator('0.1000000000');
        $this->assertEquals('0.1', $validator->format());
    }

    /**
     * 测试标准格式转换
     */
    public function test_standard_format()
    {
        $validator = new AmountValidator('100.1');
        $this->assertEquals('100.1000000000', $validator->toStandardFormat());

        $validator = new AmountValidator('100');
        $this->assertEquals('100.0000000000', $validator->toStandardFormat());
    }

    /**
     * 测试静态验证方法
     */
    public function test_static_validation()
    {
        $this->assertTrue(AmountValidator::isValid('100.0000000000'));
        $this->assertFalse(AmountValidator::isValid('0'));
        $this->assertFalse(AmountValidator::isValid('-100'));
    }

    /**
     * 测试金额比较
     */
    public function test_amount_comparison()
    {
        $this->assertEquals(0, AmountValidator::compare('100.0000000000', '100.0000000000'));
        $this->assertEquals(1, AmountValidator::compare('200.0000000000', '100.0000000000'));
        $this->assertEquals(-1, AmountValidator::compare('100.0000000000', '200.0000000000'));
    }

    /**
     * 测试金额运算
     */
    public function test_amount_calculations()
    {
        // 加法
        $result = AmountValidator::add('100.0000000000', '50.0000000000');
        $this->assertEquals('150.0000000000', $result);

        // 减法
        $result = AmountValidator::subtract('100.0000000000', '30.0000000000');
        $this->assertEquals('70.0000000000', $result);

        // 乘法
        $result = AmountValidator::multiply('100.0000000000', '2.0000');
        $this->assertEquals('200.0000000000', $result);

        // 除法
        $result = AmountValidator::divide('100.0000000000', '2.0000');
        $this->assertEquals('50.0000000000', $result);
    }

    /**
     * 测试除零异常
     */
    public function test_division_by_zero()
    {
        $this->expectException(\InvalidArgumentException::class);
        AmountValidator::divide('100.0000000000', '0');
    }

    /**
     * 测试手续费验证
     */
    public function test_fee_validation()
    {
        $validator = new AmountValidator('100.0000000000');
        
        // 金额大于手续费，应该通过
        $this->assertTrue($validator->validateWithFee('10.0000000000'));
        
        // 金额等于手续费，应该失败
        $this->assertFalse($validator->validateWithFee('100.0000000000'));
        
        // 金额小于手续费，应该失败
        $this->assertFalse($validator->validateWithFee('200.0000000000'));
    }

    /**
     * 测试边界值
     */
    public function test_boundary_values()
    {
        // 测试最小有效值
        $validator = new AmountValidator('0.0000000001');
        $this->assertTrue($validator->validate());

        // 测试最大有效值
        $validator = new AmountValidator('999999999.9999999999');
        $this->assertTrue($validator->validate());

        // 测试刚好超出范围的值
        $validator = new AmountValidator('1000000000.0000000000');
        $this->assertFalse($validator->validate());
    }
}