using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.IO;
using Newtonsoft.Json;
using PKHeX.Core;
using PKHeX.Drawing.PokeSprite;

namespace PKHeX.WinForms;

[Serializable]
public sealed class PKHeXSettings
{
    public StartupSettings Startup { get; set; } = new();
    public BackupSettings Backup { get; set; } = new();

    // General
    public LegalitySettings Legality { get; set; } = new();
    public SetImportSettings Import { get; set; } = new();
    public SlotWriteSettings SlotWrite { get; set; } = new();
    public PrivacySettings Privacy { get; set; } = new();

    // UI Tweaks
    public DisplaySettings Display { get; set; } = new();
    public SpriteSettings Sprite { get; set; } = new();
    public SoundSettings Sounds { get; set; } = new();
    public HoverSettings Hover { get; set; } = new();

    // GUI Specific
    public DrawConfig Draw { get; set; } = new();
    public AdvancedSettings Advanced { get; set; } = new();
    public EntityEditorSettings EntityEditor { get; set; } = new();
    public EntityDatabaseSettings EntityDb { get; set; } = new();
    public EncounterDatabaseSettings EncounterDb { get; set; } = new();
    public MysteryGiftDatabaseSettings MysteryDb { get; set; } = new();
    public BulkAnalysisSettings Bulk { get; set; } = new();

    public static PKHeXSettings GetSettings(string configPath)
    {
        if (!File.Exists(configPath))
            return new PKHeXSettings();

        try
        {
            var lines = File.ReadAllText(configPath);
            return JsonConvert.DeserializeObject<PKHeXSettings>(lines) ?? new PKHeXSettings();
        }
        catch (Exception x)
        {
            DumpConfigError(x);
            return new PKHeXSettings();
        }
    }

    public static void SaveSettings(string configPath, PKHeXSettings cfg)
    {
        try
        {
            var settings = new JsonSerializerSettings
            {
                Formatting = Formatting.Indented,
                DefaultValueHandling = DefaultValueHandling.Populate,
                NullValueHandling = NullValueHandling.Ignore,
            };
            var text = JsonConvert.SerializeObject(cfg, settings);
            File.WriteAllText(configPath, text);
        }
        catch (Exception x)
        {
            DumpConfigError(x);
        }
    }

    private static void DumpConfigError(Exception x)
    {
        try
        {
            File.WriteAllLines("config error.txt", new[] { x.ToString() });
        }
        catch (Exception)
        {
            Debug.WriteLine(x); // ???
        }
    }
}

[Serializable]
public sealed class BackupSettings
{
    [LocalizedDescription("Automatic Backups of Save Files are copied to the backup folder when true.")]
    public bool BAKEnabled { get; set; } = true;

    [LocalizedDescription("Tracks if the \"Create Backup\" prompt has been issued to the user.")]
    public bool BAKPrompt { get; set; }

    [LocalizedDescription("List of extra locations to look for Save Files.")]
    public string[] OtherBackupPaths { get; set; } = Array.Empty<string>();

    [LocalizedDescription("Save File file-extensions (no period) that the program should also recognize.")]
    public string[] OtherSaveFileExtensions { get; set; } = Array.Empty<string>();
}

[Serializable]
public sealed class StartupSettings : IStartupSettings
{
    [Browsable(false)]
    [LocalizedDescription("Last version that the program was run with.")]
    public string Version { get; set; } = string.Empty;

    [LocalizedDescription("Force HaX mode on Program Launch")]
    public bool ForceHaXOnLaunch { get; set; }

    [LocalizedDescription("Automatically locates the most recently saved Save File when opening a new file.")]
    public bool TryDetectRecentSave { get; set; } = true;

    [LocalizedDescription("Automatically Detect Save File on Program Startup")]
    public AutoLoadSetting AutoLoadSaveOnStartup { get; set; } = AutoLoadSetting.RecentBackup;

    [LocalizedDescription("Show the changelog when a new version of the program is run for the first time.")]
    public bool ShowChangelogOnUpdate { get; set; } = true;

    [LocalizedDescription("Loads plugins from the plugins folder, assuming the folder exists. Try LoadFile to mitigate intermittent load failures.")]
    public PluginLoadSetting PluginLoadMethod { get; set; } = PluginLoadSetting.LoadFrom;

    [Browsable(false)]
    public List<string> RecentlyLoaded { get; set; } = new(MaxRecentCount);

    // Don't let invalid values slip into the startup version.
    private GameVersion _defaultSaveVersion = GameVersion.PLA;
    private string _language = GameLanguage.DefaultLanguage;

    [Browsable(false)]
    public string Language
    {
        get => _language;
        set
        {
            if (GameLanguage.GetLanguageIndex(value) == -1)
                return;
            _language = value;
        }
    }

    [Browsable(false)]
    public GameVersion DefaultSaveVersion
    {
        get => _defaultSaveVersion;
        set
        {
            if (!value.IsValidSavedVersion())
                return;
            _defaultSaveVersion = value;
        }
    }

    private const int MaxRecentCount = 10;

    public void LoadSaveFile(string path)
    {
        var recent = RecentlyLoaded;
        // Remove from list if already present.
        if (!recent.Remove(path) && recent.Count >= MaxRecentCount)
            recent.RemoveAt(recent.Count - 1);
        recent.Insert(0, path);
    }
}

public enum PluginLoadSetting
{
    DontLoad,
    LoadFrom,
    LoadFile,
    UnsafeLoadFrom,
    LoadFromMerged,
    LoadFileMerged,
    UnsafeMerged,
}

[Serializable]
public sealed class LegalitySettings : IParseSettings
{
    [LocalizedDescription("Checks player given Nicknames and Trainer Names for profanity. Bad words will be flagged using the 3DS console's regex lists.")]
    public bool CheckWordFilter { get; set; } = true;

    [LocalizedDescription("Checks the last loaded player save file data and Current Handler state to determine if the Pokémon's Current Handler does not match the expected value.")]
    public bool CheckActiveHandler { get; set; }

    [LocalizedDescription("GB: Allow Generation 2 tradeback learnsets for PK1 formats. Disable when checking RBY Metagame rules.")]
    public bool AllowGen1Tradeback { get; set; } = true;

    [LocalizedDescription("Severity to flag a Legality Check if it is a nicknamed In-Game Trade the player cannot normally nickname.")]
    public Severity NicknamedTrade { get; set; } = Severity.Invalid;

    [LocalizedDescription("Severity to flag a Legality Check if it is a nicknamed Mystery Gift the player cannot normally nickname.")]
    public Severity NicknamedMysteryGift { get; set; } = Severity.Fishy;

    [LocalizedDescription("Severity to flag a Legality Check if the RNG Frame Checking logic does not find a match.")]
    public Severity RNGFrameNotFound { get; set; } = Severity.Fishy;

    [LocalizedDescription("Severity to flag a Legality Check if Pokémon from Gen1/2 has a Star Shiny PID.")]
    public Severity Gen7TransferStarPID { get; set; } = Severity.Fishy;

    [LocalizedDescription("Severity to flag a Legality Check if a Gen8 Memory is missing for the Handling Trainer.")]
    public Severity Gen8MemoryMissingHT { get; set; } = Severity.Fishy;

    [LocalizedDescription("Severity to flag a Legality Check if the HOME Tracker is Missing")]
    public Severity Gen8TransferTrackerNotPresent { get; set; } = Severity.Fishy;

    [LocalizedDescription("Severity to flag a Legality Check if Pokémon has a Nickname matching another Species.")]
    public Severity NicknamedAnotherSpecies { get; set; } = Severity.Fishy;

    [LocalizedDescription("Severity to flag a Legality Check if Pokémon has a zero value for both Height and Weight.")]
    public Severity ZeroHeightWeight { get; set; } = Severity.Fishy;

    [LocalizedDescription("Severity to flag a Legality Check if Pokémon's Current Handler does not match the expected value.")]
    public Severity CurrentHandlerMismatch { get; set; } = Severity.Invalid;
}

[Serializable]
public sealed class AdvancedSettings
{
    [LocalizedDescription("Allow PKM file conversion paths that are not possible via official methods. Individual properties will be copied sequentially.")]
    public EntityCompatibilitySetting AllowIncompatibleConversion { get; set; } = EntityCompatibilitySetting.DisallowIncompatible;

    [LocalizedDescription("Allow PKM file conversion paths to guess the legal original encounter data that is not stored in the format that it was converted from.")]
    public EntityRejuvenationSetting AllowGuessRejuvenateHOME { get; set; } = EntityRejuvenationSetting.MissingDataHOME;

    [LocalizedDescription("Folder path that contains dump(s) of block hash-names. If a specific dump file does not exist, only names defined within the program's code will be loaded.")]
    public string PathBlockKeyList { get; set; } = string.Empty;

    [LocalizedDescription("Hide event variables below this event type value. Removes event values from the GUI that the user doesn't care to view.")]
    public NamedEventType HideEventTypeBelow { get; set; }

    [LocalizedDescription("Hide event variable names for that contain any of the comma-separated substrings below. Removes event values from the GUI that the user doesn't care to view.")]
    public string HideEvent8Contains { get; set; } = string.Empty;

    [Browsable(false)]
    public string[] GetExclusionList8() => Array.ConvertAll(HideEvent8Contains.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries), z => z.Trim());
}

[Serializable]
public class EntityDatabaseSettings
{
    [LocalizedDescription("When loading content for the PKM Database, search within backup save files.")]
    public bool SearchBackups { get; set; } = true;

    [LocalizedDescription("When loading content for the PKM Database, search within OtherBackupPaths.")]
    public bool SearchExtraSaves { get; set; } = true;

    [LocalizedDescription("When loading content for the PKM Database, search subfolders within OtherBackupPaths.")]
    public bool SearchExtraSavesDeep { get; set; } = true;

    [LocalizedDescription("When loading content for the PKM database, the list will be ordered by this option.")]
    public DatabaseSortMode InitialSortMode { get; set; }

    [LocalizedDescription("Hides unavailable Species if the currently loaded save file cannot import them.")]
    public bool FilterUnavailableSpecies { get; set; } = true;
}

public enum DatabaseSortMode
{
    None,
    SpeciesForm,
    SlotIdentity,
}

[Serializable]
public sealed class EntityEditorSettings
{
    [LocalizedDescription("When changing the Hidden Power type, automatically maximize the IVs to ensure the highest Base Power result. Otherwise, keep the IVs as close as possible to the original.")]
    public bool HiddenPowerOnChangeMaxPower { get; set; } = true;

    [LocalizedDescription("When showing the list of balls to select, show the legal balls before the illegal balls rather than sorting by Ball ID.")]
    public bool ShowLegalBallsFirst { get; set; } = true;
}

[Serializable]
public sealed class EncounterDatabaseSettings
{
    [LocalizedDescription("Skips searching if the user forgot to enter Species / Move(s) into the search criteria.")]
    public bool ReturnNoneIfEmptySearch { get; set; } = true;

    [LocalizedDescription("Hides unavailable Species if the currently loaded save file cannot import them.")]
    public bool FilterUnavailableSpecies { get; set; } = true;

    [LocalizedDescription("Use properties from the PKM Editor tabs to specify criteria like Gender and Nature when generating an encounter.")]
    public bool UseTabsAsCriteria { get; set; } = true;

    [LocalizedDescription("Use properties from the PKM Editor tabs even if the new encounter isn't the same evolution chain.")]
    public bool UseTabsAsCriteriaAnySpecies { get; set; } = true;
}

[Serializable]
public sealed class MysteryGiftDatabaseSettings
{
    [LocalizedDescription("Hides gifts if the currently loaded save file cannot (indirectly) receive them.")]
    public bool FilterUnavailableSpecies { get; set; } = true;
}

[Serializable]
public sealed class HoverSettings
{
    [LocalizedDescription("Show PKM Slot ToolTip on Hover")]
    public bool HoverSlotShowText { get; set; } = true;

    [LocalizedDescription("Play PKM Slot Cry on Hover")]
    public bool HoverSlotPlayCry { get; set; } = true;

    [LocalizedDescription("Show a Glow effect around the PKM on Hover")]
    public bool HoverSlotGlowEdges { get; set; } = true;
}

[Serializable]
public sealed class SoundSettings
{
    [LocalizedDescription("Play Sound when loading a new Save File")]
    public bool PlaySoundSAVLoad { get; set; } = true;
    [LocalizedDescription("Play Sound when popping up Legality Report")]
    public bool PlaySoundLegalityCheck { get; set; } = true;
}

[Serializable]
public sealed class SetImportSettings
{
    [LocalizedDescription("Apply StatNature to Nature on Import")]
    public bool ApplyNature { get; set; } = true;
    [LocalizedDescription("Apply Markings on Import")]
    public bool ApplyMarkings { get; set; } = true;
}

[Serializable]
public sealed class SlotWriteSettings
{
    [LocalizedDescription("Automatically modify the Save File's Pokédex when injecting a PKM.")]
    public bool SetUpdateDex { get; set; } = true;

    [LocalizedDescription("Automatically adapt the PKM Info to the Save File (Handler, Format)")]
    public bool SetUpdatePKM { get; set; } = true;

    [LocalizedDescription("When enabled and closing/loading a save file, the program will alert if the current save file has been modified without saving.")]
    public bool ModifyUnset { get; set; } = true;
}

[Serializable]
public sealed class DisplaySettings
{
    [LocalizedDescription("Show Unicode gender symbol characters, or ASCII when disabled.")]
    public bool Unicode { get; set; } = true;

    [LocalizedDescription("Don't show the Legality popup if Legal!")]
    public bool IgnoreLegalPopup { get; set; }

    [LocalizedDescription("Flag Illegal Slots in Save File")]
    public bool FlagIllegal { get; set; } = true;
}

[Serializable]
public sealed class SpriteSettings : ISpriteSettings
{
    [LocalizedDescription("Choice for which sprite building mode to use.")]
    public SpriteBuilderPreference SpritePreference { get; set; } = SpriteBuilderPreference.UseSuggested;

    [LocalizedDescription("Show fan-made shiny sprites when the PKM is shiny.")]
    public bool ShinySprites { get; set; } = true;

    [LocalizedDescription("Show an Egg Sprite As Held Item rather than hiding the PKM")]
    public bool ShowEggSpriteAsHeldItem { get; set; } = true;

    [LocalizedDescription("Show the required ball for an Encounter Template")]
    public bool ShowEncounterBall { get; set; } = true;

    [LocalizedDescription("Show a background to differentiate an Encounter Template's type")]
    public SpriteBackgroundType ShowEncounterColor { get; set; } = SpriteBackgroundType.FullBackground;

    [LocalizedDescription("Show a background to differentiate the recognized Encounter Template type for PKM slots")]
    public SpriteBackgroundType ShowEncounterColorPKM { get; set; }

    [LocalizedDescription("Opacity for the Encounter Type background layer.")]
    public byte ShowEncounterOpacityBackground { get; set; } = 0x3F; // kinda low

    [LocalizedDescription("Opacity for the Encounter Type stripe layer.")]
    public byte ShowEncounterOpacityStripe { get; set; } = 0x5F; // 0xFF opaque

    [LocalizedDescription("Show a thin stripe to indicate the percent of level-up progress")]
    public bool ShowExperiencePercent { get; set; }

    [LocalizedDescription("Amount of pixels thick to show when displaying the encounter type color stripe.")]
    public int ShowEncounterThicknessStripe { get; set; } = 4; // pixels
}

[Serializable]
public sealed class PrivacySettings
{
    [LocalizedDescription("Hide Save File Details in Program Title")]
    public bool HideSAVDetails { get; set; }

    [LocalizedDescription("Hide Secret Details in Editors")]
    public bool HideSecretDetails { get; set; }
}

[Serializable]
public sealed class BulkAnalysisSettings : IBulkAnalysisSettings
{
    [LocalizedDescription("Checks the save file data and Current Handler state to determine if the Pokémon's Current Handler does not match the expected value.")]
    public bool CheckActiveHandler { get; set; } = true;
}