using CustomizePlus.Profiles.Data;
using CustomizePlus.Profiles.Events;
using CustomizePlus.Templates.Data;
using CustomizePlus.Templates;
using Newtonsoft.Json.Linq;
using OtterGui.Classes;
using Penumbra.GameData.Actors;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Penumbra.String;
using Penumbra.GameData.Structs;

namespace CustomizePlus.Profiles;

public partial class ProfileManager : IDisposable
{
    public void LoadProfiles()
    {
        _logger.Information("Loading profiles...");

        //todo: hot reload was not tested
        //save temp profiles
        var temporaryProfiles = Profiles.Where(x => x.IsTemporary).ToList();

        Profiles.Clear();
        List<(Profile, string)> invalidNames = new();
        foreach (var file in _saveService.FileNames.Profiles())
        {
            _logger.Debug($"Reading profile {file.FullName}");

            try
            {
                var text = File.ReadAllText(file.FullName);
                var data = JObject.Parse(text);
                var profile = LoadIndividualProfile(data);
                if (profile.UniqueId.ToString() != Path.GetFileNameWithoutExtension(file.Name))
                    invalidNames.Add((profile, file.FullName));
                if (Profiles.Any(f => f.UniqueId == profile.UniqueId))
                    throw new Exception($"ID {profile.UniqueId} was not unique.");

                Profiles.Add(profile);
            }
            catch (Exception ex)
            {
                _logger.Error($"Could not load profile, skipped:\n{ex}");
                //++skipped;
            }
        }

        foreach (var profile in Profiles)
        {
            //This will solve any issues if file on disk was manually edited and we have more than a single active profile
            if (profile.Enabled)
                SetEnabled(profile, true, true);

            if (_configuration.DefaultProfile == profile.UniqueId)
                DefaultProfile = profile;
        }

        //insert temp profiles back into profile list
        if (temporaryProfiles.Count > 0)
        {
            Profiles.AddRange(temporaryProfiles);
            Profiles.Sort((x, y) => y.IsTemporary.CompareTo(x.IsTemporary));
        }

        var failed = MoveInvalidNames(invalidNames);
        if (invalidNames.Count > 0)
            _logger.Information(
                $"Moved {invalidNames.Count - failed} profiles to correct names.{(failed > 0 ? $" Failed to move {failed} profiles to correct names." : string.Empty)}");

        _logger.Information("Profiles load complete");
        _event.Invoke(ProfileChanged.Type.ReloadedAll, null, null);
    }

    private Profile LoadIndividualProfile(JObject obj)
    {
        var version = obj["Version"]?.ToObject<int>() ?? 0;
        return version switch
        {
            //Ignore everything below v4
             4 => LoadV4(obj),
             5 => LoadV5(obj),
            _ => throw new Exception("The profile to be loaded has no valid Version."),
        };
    }

    private Profile LoadV4(JObject obj)
    {
        var profile = LoadProfileV4V5(obj);

        profile.CharacterName = new LowerString(obj["CharacterName"]?.ToObject<string>()?.Trim() ?? throw new ArgumentNullException("CharacterName"));

        return profile;
    }

    private Profile LoadV5(JObject obj)
    {
        var profile = LoadProfileV4V5(obj);

        var character = _actorManager.FromJson(obj["Character"] as JObject);

        profile.Character = character;
        profile.ApplyToCurrentlyActiveCharacter = obj["ApplyToCurrentlyActiveCharacter"]?.ToObject<bool>() ?? false;
        profile.CharacterName = new LowerString(obj["CharacterName"]?.ToObject<string>()?.Trim() ?? throw new ArgumentNullException("CharacterName")); //temp

        return profile;
    }

    //V4 and V5 are mostly not different, so common loading logic is here
    private Profile LoadProfileV4V5(JObject obj)
    {
        var creationDate = obj["CreationDate"]?.ToObject<DateTimeOffset>() ?? throw new ArgumentNullException("CreationDate");

        var profile = new Profile()
        {
            CreationDate = creationDate,
            UniqueId = obj["UniqueId"]?.ToObject<Guid>() ?? throw new ArgumentNullException("UniqueId"),
            Name = new LowerString(obj["Name"]?.ToObject<string>()?.Trim() ?? throw new ArgumentNullException("Name")),
            LimitLookupToOwnedObjects = obj["LimitLookupToOwnedObjects"]?.ToObject<bool>() ?? throw new ArgumentNullException("LimitLookupToOwnedObjects"),
            Enabled = obj["Enabled"]?.ToObject<bool>() ?? throw new ArgumentNullException("Enabled"),
            ModifiedDate = obj["ModifiedDate"]?.ToObject<DateTimeOffset>() ?? creationDate,
            IsWriteProtected = obj["IsWriteProtected"]?.ToObject<bool>() ?? false,
            Templates = new List<Template>()
        };
        if (profile.ModifiedDate < creationDate)
            profile.ModifiedDate = creationDate;

        if (obj["Templates"] is not JArray templateArray)
            return profile;

        foreach (var templateObj in templateArray)
        {
            if (templateObj is not JObject templateObjCast)
            {
                //todo: warning
                continue;
            }

            var templateId = templateObjCast["TemplateId"]?.ToObject<Guid>();
            if (templateId == null)
                continue; //todo: error

            var template = _templateManager.GetTemplate((Guid)templateId);
            if (template != null)
                profile.Templates.Add(template);
        }

        return profile;
    }
}