using GoveeCSharpConnector.Interfaces;
using GoveeCSharpConnector.Objects;
using System.Net.Http.Json;
using System.Text;
using System.Text.Json;

namespace GoveeCSharpConnector.Services;

public class GoveeApiService : IGoveeApiService {

    private string _APIKey = string.Empty;
    private readonly HttpClient _HttpClient = new();
    private const string _GoveeApiAddress = "https://developer-api.govee.com/v1";

    public string GetApiKey() =>
        _APIKey;

    public void SetApiKey(string apiKey) {
        _APIKey = apiKey;
        _HttpClient.DefaultRequestHeaders.Add("Govee-API-Key", _APIKey);
    }

    public void RemoveApiKey() {
        _APIKey = string.Empty;
        _ = _HttpClient.DefaultRequestHeaders.Remove("Govee-Api-Key");
    }

    private readonly JsonSerializerOptions _JsonOptions = new() {
        PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
    };

    public Task<HttpResponseMessage> ToggleStateAsync(string deviceId, string deviceModel, bool on) =>
        SendCommandAsync(deviceId, deviceModel, "turn", on ? "on" : "off");

    public Task<HttpResponseMessage> SetBrightnessAsync(string deviceId, string deviceModel, int value) =>
        SendCommandAsync(deviceId, deviceModel, "brightness", value);

    public Task<HttpResponseMessage> SetColorAsync(string deviceId, string deviceModel, RgbColor color) =>
        SendCommandAsync(deviceId, deviceModel, "color", color);

    public Task<HttpResponseMessage> SetColorTempAsync(string deviceId, string deviceModel, int value) =>
        SendCommandAsync(deviceId, deviceModel, "colorTem", value);

    public Task<GoveeResponse> GetDevicesResponseAsync() =>
        _HttpClient.GetFromJsonAsync<GoveeResponse>($"{_GoveeApiAddress}/devices");

    public Task<GoveeApiState> GetDeviceStateAsync(string deviceId, string deviceModel) =>
        _HttpClient.GetFromJsonAsync<GoveeApiState>($"{_GoveeApiAddress}/devices/state?device={deviceId}&model={deviceModel}");

    private Task<HttpResponseMessage> SendCommandAsync(string deviceId, string deviceModel, string command, object commandObject) {
        Task<HttpResponseMessage> result;
        GoveeApiCommand commandRequest = new() {
            Device = deviceId,
            Model = deviceModel,
            Cmd = new Command() {
                Name = command,
                Value = commandObject
            }
        };
        StringContent httpContent = new(JsonSerializer.Serialize(commandRequest, _JsonOptions), Encoding.UTF8, "application/json");
        result = _HttpClient.PutAsync($"{_GoveeApiAddress}/devices/control", httpContent);
        return result;
    }

}