using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Http.HttpResults;
using Microsoft.AspNetCore.Mvc;

namespace WorkTime.Defaults;

public class DataResult<TResult, TError>
    where TResult : notnull
    where TError : notnull {
    public TResult? Content { get; }
    public TError? Error { get; }
    
    public bool IsSuccessful => Error is null && Content is not null;

    public IResult HttpResult => ToHttpResult(this);

    public DataResult(TResult result) {
        Content = result;
    }

    public DataResult(TError error) {
        Error = error;
    }

    public static IResult ToHttpResult(DataResult<TResult, TError> dataResult) {
        if (dataResult.Content is bool content)
            return content ? Results.Ok() : Results.BadRequest();
        
        if (dataResult.IsSuccessful)
            return Results.Ok(dataResult.Content);

        if (dataResult.Error is ValidationProblemDetails validationProblem)
            return Results.ValidationProblem(
                validationProblem.Errors,
                validationProblem.Detail,
                validationProblem.Instance,
                validationProblem.Status,
                validationProblem.Title,
                validationProblem.Type);

        if (dataResult.Error is ProblemDetails problem)
            return Results.Problem(problem);
        
        if (typeof(TError).IsAssignableTo(typeof(IResult)))
            return dataResult.Error as IResult ?? Results.Problem();

        return Results.Problem();
    }

    public static implicit operator DataResult<TResult, TError>(TResult result) {
        return new DataResult<TResult, TError>(result);
    }

    public static implicit operator DataResult<TResult, TError>(TError error) {
        return new DataResult<TResult, TError>(error);
    }
}

public class DataResult<TResult> : DataResult<TResult, Exception> where TResult : notnull {
    public DataResult(TResult result) : base(result) { }
    public DataResult(Exception error) : base(error) { }

    public static implicit operator DataResult<TResult>(TResult result) {
        return new DataResult<TResult>(result);
    }

    public static implicit operator DataResult<TResult>(Exception error) {
        return new DataResult<TResult>(error);
    }
}

public class DataResult : DataResult<bool> {
    public DataResult(bool result) : base(result) { }
    public DataResult(Exception error) : base(error) { }
    
    public static implicit operator DataResult(bool result) {
        return new DataResult(result);
    }
    
    public static implicit operator DataResult(Exception error) {
        return new DataResult(error);
    }
}