using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.IO;

using Newtonsoft.Json;

using UnityEngine;
using UnityEngine.Networking;
using UnityEngine.UIElements;

using SpaceRace.Shared;

public class PlayerData {
    public Guid Id;
}

public class LapService {
    static string playerDataPath = Path.Combine(Application.persistentDataPath, "playerData.json");
    string _mapName;
    PlayerData _player;
    PbDTO _pb;
    PbDTO _lr;

    public Lap Pb;
    public Lap LapRecord;

    public string Position => _pb switch {
        PbDTO pb => pb.Position.ToString(),
        null => "-",
    };

    public string Completions => _lr switch {
        PbDTO lr => lr.Completions.ToString(),
        null => "-",
    };

    public LapService(string mapName) {
        _mapName = mapName;
        LoadPlayerData();
    }

    public IEnumerator GetLapTimes() {
        string uri = $"localhost:40080/LapTimes?userId={_player.Id}&mapName={_mapName}";
        using (UnityWebRequest req = UnityWebRequest.Get(uri)) {
            yield return req.SendWebRequest();

            switch (req.result) {
                case UnityWebRequest.Result.Success:
                    Debug.Log("Received: " + req.downloadHandler.text);
                    SetLapTimes(req.downloadHandler.text);
                    break;
                default:
                    Debug.LogError("Error: " + req.error);
                    break;
            }
        }
    }

    void SetLapTimes(string json) {
        try {
            LapTimesDTO dto = JsonConvert.DeserializeObject<LapTimesDTO>(json);
            _pb = dto.Pb;
            _lr = dto.LapRecord;

            if (dto.Pb != null)
                Pb = new Lap {
                    Map = _pb.Map,
                    Sectors = _pb.Sectors.Select((d, i) => new SectorTime { Sector = i + 1, Seconds = d }).ToList(),
                };

            if (dto.LapRecord != null)
                LapRecord = new Lap {
                    Map = _lr.Map,
                    Sectors = _lr.Sectors.Select((d, i) => new SectorTime { Sector = i + 1, Seconds = d }).ToList(),
                };
        } catch (Exception e) {
            Debug.LogWarning($"Failed to set lap times {e}");
            _pb = null;
            _lr = null;
            Pb = null;
        }
    }

    public IEnumerator PostLap(Lap lap) {
        LapDTO dto = new LapDTO {
            Id = Guid.NewGuid(),
            UserId = _player.Id,
            Map = _mapName,
            Time = lap.TotalTime,
            Sectors = lap.Sectors.Select(s => s.Seconds).ToList(),
            Created = DateTimeOffset.UtcNow,
        };

        Debug.Log($"Posting lap: {JsonConvert.SerializeObject(dto)}");

        using (UnityWebRequest req = UnityWebRequest.Post("localhost:40080/Lap", JsonConvert.SerializeObject(dto), "application/json")) {
            yield return req.SendWebRequest();

            if (req.result != UnityWebRequest.Result.Success) {
                Debug.Log(req.error);
            } else {
                Debug.Log($"posted lap {dto}");
                Debug.Log("Received: " + req.downloadHandler.text);
                SetLapTimes(req.downloadHandler.text);
            }
        }
    }

    void LoadPlayerData() {
        try {
            string json = File.ReadAllText(playerDataPath);
            _player = JsonConvert.DeserializeObject<PlayerData>(json);
            Debug.Log($"Loaded player data {json}");
        } catch {
            Debug.Log("No existing playerData.json");
            CreatePlayerData();
        }
    }

    PlayerData CreatePlayerData() {
        _player = new PlayerData { Id = Guid.NewGuid() };
        Debug.Log(JsonConvert.SerializeObject(_player));
        File.WriteAllText(playerDataPath, JsonConvert.SerializeObject(_player));
        return _player;
    }
}