using System;
using System.IO;

namespace StardewModdingAPI
{
    /// <summary>The base class for a mod.</summary>
    public class Mod
    {
        /*********
        ** Properties
        *********/
        /// <summary>The backing field for <see cref="Mod.PathOnDisk"/>.</summary>
        private string _pathOnDisk;

        /*********
        ** Accessors
        *********/
        /// <summary>Provides methods for interacting with the mod directory, such as read/writing a config file or custom JSON files.</summary>
        public ModHelper Helper { get; internal set; }

        /// <summary>The mod's manifest.</summary>
        public Manifest Manifest { get; internal set; }

        /// <summary>The full path to the mod's directory on the disk.</summary>
        [Obsolete("Use " + nameof(Mod.Helper) + "." + nameof(ModHelper.DirectoryPath) + " instead")]
        public string PathOnDisk
        {
            get
            {
                Program.DeprecationManager.Warn($"{nameof(Mod)}.{nameof(PathOnDisk)}", "1.0");
                return this._pathOnDisk;
            }
            internal set { this._pathOnDisk = value; }
        }

        /// <summary>The full path to the mod's <c>config.json</c> file on the disk.</summary>
        [Obsolete("Use " + nameof(Mod.Helper) + "." + nameof(ModHelper.ReadConfig) + " instead")]
        public string BaseConfigPath
        {
            get
            {
                Program.DeprecationManager.Warn($"{nameof(Mod)}.{nameof(BaseConfigPath)}", "1.0");
                Program.DeprecationManager.MarkWarned($"{nameof(Mod)}.{nameof(PathOnDisk)}", "1.0"); // avoid redundant warnings
                return Path.Combine(this.PathOnDisk, "config.json");
            }
        }

        /// <summary>The full path to the per-save configs folder (if <see cref="StardewModdingAPI.Manifest.PerSaveConfigs"/> is <c>true</c>).</summary>
        [Obsolete("Use " + nameof(Mod.Helper) + "." + nameof(ModHelper.ReadJsonFile) + " instead")]
        public string PerSaveConfigFolder => this.GetPerSaveConfigFolder();

        /// <summary>The full path to the per-save configuration file for the current save (if <see cref="StardewModdingAPI.Manifest.PerSaveConfigs"/> is <c>true</c>).</summary>
        [Obsolete("Use " + nameof(Mod.Helper) + "." + nameof(ModHelper.ReadJsonFile) + " instead")]
        public string PerSaveConfigPath
        {
            get
            {
                Program.DeprecationManager.Warn($"{nameof(Mod)}.{nameof(PerSaveConfigPath)}", "1.0");
                Program.DeprecationManager.MarkWarned($"{nameof(Mod)}.{nameof(PerSaveConfigFolder)}", "1.0"); // avoid redundant warnings
                return Constants.CurrentSavePathExists ? Path.Combine(this.PerSaveConfigFolder, Constants.SaveFolderName + ".json") : "";
            }
        }


        /*********
        ** Public methods
        *********/
        /// <summary>The entry point for your mod. It will always be called once when the mod loads.</summary>
        [Obsolete("This overload is obsolete since SMAPI 1.0.")]
        public virtual void Entry(params object[] objects) { }

        /// <summary>The entry point for your mod. It will always be called once when the mod loads.</summary>
        /// <param name="helper">Provides methods for interacting with the mod directory, such as read/writing a config file or custom JSON files.</param>
        public virtual void Entry(ModHelper helper) { }


        /*********
        ** Private methods
        *********/
        /// <summary>Get the full path to the per-save configuration file for the current save (if <see cref="StardewModdingAPI.Manifest.PerSaveConfigs"/> is <c>true</c>).</summary>
        private string GetPerSaveConfigFolder()
        {
            Program.DeprecationManager.Warn($"{nameof(Mod)}.{nameof(PerSaveConfigFolder)}", "1.0");
            Program.DeprecationManager.MarkWarned($"{nameof(Mod)}.{nameof(PathOnDisk)}", "1.0"); // avoid redundant warnings

            if (!this.Manifest.PerSaveConfigs)
            {
                Log.Error($"The mod [{this.Manifest.Name}] is not configured to use per-save configs.");
                return "";
            }
            return Path.Combine(this.PathOnDisk, "psconfigs");
        }
    }
}