using System;
using System.Collections.Generic;
using System.IO;
using CustomizePlus.Armatures.Data;
using CustomizePlus.Core.Data;
using CustomizePlus.Core.Extensions;
using CustomizePlus.Core.Services;
using CustomizePlus.Templates;
using CustomizePlus.Templates.Data;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using OtterGui.Classes;
using Penumbra.GameData.Actors;

namespace CustomizePlus.Profiles.Data;

/// <summary>
///     Encapsulates the user-controlled aspects of a character profile, ie all of
///     the information that gets saved to disk by the plugin.
/// </summary>
public sealed class Profile : ISavable
{
    private static int _nextGlobalId;

    private readonly int _localId;

    public List<Armature> Armatures = new();

    public LowerString CharacterName { get; set; } = LowerString.Empty;
    public LowerString Name { get; set; } = LowerString.Empty;

    /// <summary>
    /// Whether to search only through local player owned characters or all characters when searching for game object by name
    /// </summary>
    public bool LimitLookupToOwnedObjects { get; set; } = false;

    public int Version { get; set; } = Constants.ConfigurationVersion;

    public bool Enabled { get; set; }
    public DateTimeOffset CreationDate { get; set; } = DateTime.UtcNow;
    public DateTimeOffset ModifiedDate { get; set; } = DateTime.UtcNow;

    public Guid UniqueId { get; set; } = Guid.NewGuid();

    public List<Template> Templates { get; init; } = new();

    public bool IsWriteProtected { get; internal set; }

    /// <summary>
    /// Specifies if this profile is not persistent (ex. was made via IPC calls) and should not be displayed in UI.
    /// WARNING, TEMPLATES FOR TEMPORARY PROFILES *ARE NOT* STORED IN TemplateManager
    /// </summary>
    public bool IsTemporary { get; set; }

    /// <summary>
    /// Identificator specifying specific actor this profile applies to, only works for temporary profiles
    /// </summary>
    public ActorIdentifier TemporaryActor { get; set; } = ActorIdentifier.Invalid;

    public string Incognito
        => UniqueId.ToString()[..8];

    public Profile()
    {
        _localId = _nextGlobalId++;
    }

    /// <summary>
    /// Creates a new profile based on data from another one
    /// </summary>
    /// <param name="original"></param>
    public Profile(Profile original) : this()
    {
        CharacterName = original.CharacterName;
        LimitLookupToOwnedObjects = original.LimitLookupToOwnedObjects;

        foreach (var template in original.Templates)
        {
            Templates.Add(template);
        }
    }

    public override string ToString()
    {
        return $"Profile '{Name.Text.Incognify()}' on {CharacterName.Text.Incognify()} [{UniqueId}]";
    }

    #region Serialization

    public new JObject JsonSerialize()
    {
        var ret = new JObject()
        {
            ["Version"] = Version,
            ["UniqueId"] = UniqueId,
            ["CreationDate"] = CreationDate,
            ["ModifiedDate"] = ModifiedDate,
            ["CharacterName"] = CharacterName.Text,
            ["Name"] = Name.Text,
            ["LimitLookupToOwnedObjects"] = LimitLookupToOwnedObjects,
            ["Enabled"] = Enabled,
            ["IsWriteProtected"] = IsWriteProtected,
            ["Templates"] = SerializeTemplates()
        };

        return ret;
    }

    private JArray SerializeTemplates()
    {
        var ret = new JArray();
        foreach (var template in Templates)
        {
            ret.Add(new JObject()
            {
                ["TemplateId"] = template.UniqueId
            });
        }
        return ret;
    }

    #endregion

    #region Deserialization

    public static Profile Load(TemplateManager templateManager, JObject obj)
    {
        var version = obj["Version"]?.ToObject<int>() ?? 0;
        return version switch
        {
            //Ignore everything below v4 for now
            4 => LoadV4(templateManager, obj),
            _ => throw new Exception("The design to be loaded has no valid Version."),
        };
    }

    private static Profile LoadV4(TemplateManager templateManager, 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>() ?? throw new ArgumentNullException("Name")),
            CharacterName = new LowerString(obj["CharacterName"]?.ToObject<string>() ?? throw new ArgumentNullException("CharacterName")),
            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;
    }

    #endregion

    #region ISavable

    public string ToFilename(FilenameService fileNames)
        => fileNames.ProfileFile(this);

    public void Save(StreamWriter writer)
    {
        //saving of temporary profiles is not allowed
        if (IsTemporary)
            return;

        using var j = new JsonTextWriter(writer)
        {
            Formatting = Formatting.Indented,
        };
        var obj = JsonSerialize();
        obj.WriteTo(j);
    }

    public string LogName(string fileName)
        => Path.GetFileNameWithoutExtension(fileName);

    #endregion
}