using FluentValidation;
using InboxIntel.Application.DTOs;
using InboxIntel.Domain.Enums;

namespace InboxIntel.Application.Validation;

public class SearchRequestValidator : AbstractValidator<SearchRequestDto>
{
    public SearchRequestValidator()
    {
        RuleFor(x => x.Page).GreaterThan(0);
        RuleFor(x => x.PageSize).InclusiveBetween(1, 200);
        RuleFor(x => x)
            .Must(x => x.From is null || x.To is null || x.From <= x.To)
            .WithMessage("'From' date must be on or before 'To' date.");
    }
}

public class CleanupRequestValidator : AbstractValidator<CleanupRequestDto>
{
    public CleanupRequestValidator()
    {
        RuleFor(x => x)
            .Must(x => (x.EmailIds is { Count: > 0 }) || !string.IsNullOrWhiteSpace(x.Query))
            .WithMessage("Provide either EmailIds or a Query to target emails.");

        // Safety rule: destructive actions must be explicitly confirmed.
        RuleFor(x => x.Confirmed)
            .Equal(true)
            .When(x => x.Action is CleanupActionType.Trash or CleanupActionType.HardDelete)
            .WithMessage("Destructive actions require explicit confirmation.");

        RuleFor(x => x.LabelId)
            .NotEmpty()
            .When(x => x.Action is CleanupActionType.AddLabel or CleanupActionType.RemoveLabel)
            .WithMessage("A LabelId is required for label actions.");
    }
}

public class UnsubscribeRequestValidator : AbstractValidator<UnsubscribeRequestDto>
{
    public UnsubscribeRequestValidator()
    {
        RuleFor(x => x.ItemIds).NotEmpty();
        RuleFor(x => x.Confirmed).Equal(true)
            .WithMessage("Unsubscribe actions require explicit confirmation.");
    }
}