using Salmon.Core;
using Salmon.Core.Cliff;
using System.Diagnostics;

namespace Salmon.Model.Monitor;

public class WebEndpoint
    : Element
{
    [PersistentField]
    public bool Joinable { get; set; } = true;

    [PersistentField]
    public string? Uri { get; set; }

    [PersistentField]
    public string? Method { get; set; }

    [PersistentField]
    public int? Code { get; set; }

    [PersistentField]
    public string? Content { get; set; }

    public bool Ok
    {
        get
        {
            return Joinable && (Code != null && Code >= 200 && Code < 300);
        }
    }

    protected WebEndpoint()
    {
    }

    public WebEndpoint(string identifier)
        : base(identifier)
    {

    }

    public override IEnumerable<KeyValuePair<string, object>> ImportantProperties()
    {
        foreach (var kv in base.ImportantProperties())
            yield return kv;

        if (Uri is not null)
            yield return new KeyValuePair<string, object>(nameof(Uri), Uri);

        if (Method is not null)
            yield return new KeyValuePair<string, object>(nameof(Method), Method);

        yield return new KeyValuePair<string, object>(nameof(Ok), Ok);

        if (Code is not null)
            yield return new KeyValuePair<string, object>(nameof(Code), Code);
    }

    public static async Task<WebEndpoint> From(string uri, string method = "GET", string? id = null)
    {
        if(id is null)
            id = Helper.CreateIdFrom("webendpoint", uri, method);

        using HttpClient client = new();
        HttpMethod httpmethod = new(method);
        HttpRequestMessage request = new(httpmethod, uri);

        HttpResponseMessage response;
        var ret = new WebEndpoint(id)
        {
            Uri = uri,
            Method = method
        };

        try
        {
            response = await client.SendAsync(request);
        }
        catch(Exception e)
        {
            ret.Joinable = false;
            ret.Content = e.ToString();
            return ret;
        }

        ret.Code = (int)response.StatusCode;
        ret.Content = response.Content.ToString();

        return ret;
    }
}