using System.ComponentModel.DataAnnotations;
using MAX.Framework.Validation;
using Store.Users.Contracts.Dtos;
using Store.Users.Dtos;

namespace Store.Users.Tests;

/// <summary>验证服务入口使用的 DTO 注解和跨字段规则。</summary>
public sealed class RequestValidatorTests
{
    [Fact]
    public void NullRequest_IsRejectedByBothEntrypoints()
    {
        Assert.Equal("request", Assert.Throws<ArgumentNullException>(() => RequestValidator.Validate(null)).ParamName);
        Assert.Throws<ArgumentNullException>(() => RequestValidator.TryValidate(null, out _));
    }

    [Fact]
    public void ValidDto_PassesWithoutChangingInput()
    {
        var request = new UserCreateRequest { UserName = " main ", Password = "password", Notes = "" };
        RequestValidator.Validate(request);
        Assert.True(RequestValidator.TryValidate(request, out var errors));
        Assert.Empty(errors);
        Assert.Equal(" main ", request.UserName);
    }

    [Theory]
    [InlineData(null)]
    [InlineData("")]
    [InlineData("   ")]
    public void RequiredFields_RejectNullEmptyAndWhitespace(string? value)
    {
        var request = new UserFundsRequest { UserName = value!, RequestId = "id", Amount = 1m, Operation = "充值" };
        var error = Assert.Throws<ValidationException>(() => RequestValidator.Validate(request));
        Assert.Equal("目标账户不能为空", error.Message);
        Assert.Contains(nameof(UserFundsRequest.UserName), error.ValidationResult!.MemberNames);
    }

    [Fact]
    public void TryValidate_ReturnsAllMissingRequiredFields()
    {
        Assert.False(RequestValidator.TryValidate(new UserFundsRequest(), out var errors));
        Assert.Equal(4, errors.Count);
        Assert.Contains(errors, e => e.MemberNames.Contains(nameof(UserFundsRequest.Amount)));
        Assert.Contains(errors, e => e.MemberNames.Contains(nameof(UserFundsRequest.UserName)));
        Assert.Contains(errors, e => e.MemberNames.Contains(nameof(UserFundsRequest.RequestId)));
        Assert.Contains(errors, e => e.MemberNames.Contains(nameof(UserFundsRequest.Operation)));
    }

    public static TheoryData<object> InvalidRequests => new()
    {
        new UserFundsRequest { UserName = new string('u', 21), RequestId = "id", Amount = 1, Operation = "充值" },
        new UserFundsRequest { UserName = "user", RequestId = "id", Amount = -1, Operation = "充值" },
        new UserFundsRequest { UserName = "user", RequestId = "id", Amount = 1.001m, Operation = "充值" },
        new UserTopUpQrcodeRequest { AgentCode = "agent", QrcodeBase64 = "invalid!" },
        new UserRecordSearchRequest { Page = 0 },
        new UserRecordSearchRequest { StartTime = new(2025, 2, 1), EndTime = new(2025, 1, 1) },
        new ShopRenewRequest { ShopId = "shop", RenewDuration = 0 },
        new ShopRenewRequest { ShopId = "shop", RenewDuration = 121 },
        new UserCreateRequest { UserName = "user", Password = "123" },
        new UserCreateRequest { UserName = "user", Password = "password", ShopPointsPerMonth = 1 }
    };

    [Theory]
    [MemberData(nameof(InvalidRequests))]
    public void InvalidDto_IsRejectedAtValidationEntry(object request)
    {
        Assert.Throws<ValidationException>(() => RequestValidator.Validate(request));
        Assert.False(RequestValidator.TryValidate(request, out var errors));
        Assert.NotEmpty(errors);
    }

    [Fact]
    public void FrameworkValidator_StillSupportsOtherModulesAnnotationsAndCrossFieldRules()
    {
        Assert.Throws<ValidationException>(() => RequestValidator.Validate(new OtherModuleRequest { Name = "toolong" }));
        Assert.False(RequestValidator.TryValidate(new OtherModuleRequest { Name = "ok", Count = 0 }, out _));
        var request = new OtherModuleRequest { Name = "ok", Count = 2, Start = 2, End = 1 };
        Assert.Equal("顺序错误", Assert.Throws<ValidationException>(() => RequestValidator.Validate(request)).Message);
    }

    private sealed class OtherModuleRequest : IValidatableObject
    {
        [Required, StringLength(4)] public string Name { get; set; } = "";
        [Range(1, 10)] public int Count { get; set; } = 1;
        public int Start { get; set; }
        public int End { get; set; }
        public IEnumerable<ValidationResult> Validate(ValidationContext context)
        {
            if (Start > End) yield return new ValidationResult("顺序错误");
        }
    }
}