using System;
using System.Collections.Generic;
using System.Runtime.Serialization;
using Newtonsoft.Json;
using StardewModdingAPI.Toolkit.Serialization.Converters;

namespace StardewModdingAPI.Toolkit.Serialization.Models
{
    /// <summary>A manifest which describes a mod for SMAPI.</summary>
    public class Manifest : IManifest
    {
        /*********
        ** Accessors
        *********/
        /// <summary>The mod name.</summary>
        public string Name { get; set; }

        /// <summary>A brief description of the mod.</summary>
        public string Description { get; set; }

        /// <summary>The mod author's name.</summary>
        public string Author { get; set; }

        /// <summary>The mod version.</summary>
        public ISemanticVersion Version { get; set; }

        /// <summary>The minimum SMAPI version required by this mod, if any.</summary>
        public ISemanticVersion MinimumApiVersion { get; set; }

        /// <summary>The name of the DLL in the directory that has the <c>Entry</c> method. Mutually exclusive with <see cref="ContentPackFor"/>.</summary>
        public string EntryDll { get; set; }

        /// <summary>The mod which will read this as a content pack. Mutually exclusive with <see cref="Manifest.EntryDll"/>.</summary>
        [JsonConverter(typeof(ManifestContentPackForConverter))]
        public IManifestContentPackFor ContentPackFor { get; set; }

        /// <summary>The other mods that must be loaded before this mod.</summary>
        [JsonConverter(typeof(ManifestDependencyArrayConverter))]
        public IManifestDependency[] Dependencies { get; set; }

        /// <summary>The namespaced mod IDs to query for updates (like <c>Nexus:541</c>).</summary>
        public string[] UpdateKeys { get; set; }

        /// <summary>The unique mod ID.</summary>
        public string UniqueID { get; set; }

        /// <summary>Any manifest fields which didn't match a valid field.</summary>
        [JsonExtensionData]
        public IDictionary<string, object> ExtraFields { get; set; }


        /*********
        ** Public methods
        *********/
        /// <summary>Construct an instance.</summary>
        public Manifest() { }

        /// <summary>Construct an instance for a transitional content pack.</summary>
        /// <param name="uniqueID">The unique mod ID.</param>
        /// <param name="name">The mod name.</param>
        /// <param name="author">The mod author's name.</param>
        /// <param name="description">A brief description of the mod.</param>
        /// <param name="version">The mod version.</param>
        /// <param name="contentPackFor">The modID which will read this as a content pack.</param>
        public Manifest(string uniqueID, string name, string author, string description, ISemanticVersion version, string contentPackFor = null)
        {
            this.Name = name;
            this.Author = author;
            this.Description = description;
            this.Version = version;
            this.UniqueID = uniqueID;
            this.UpdateKeys = Array.Empty<string>();
            this.ContentPackFor = new ManifestContentPackFor { UniqueID = contentPackFor };
        }

        /// <summary>Normalize the model after it's deserialized.</summary>
        /// <param name="context">The deserialization context.</param>
        [OnDeserialized]
        public void OnDeserialized(StreamingContext context)
        {
            this.Dependencies ??= Array.Empty<IManifestDependency>();
            this.UpdateKeys ??= Array.Empty<string>();
        }
    }
}