using System.Diagnostics.CodeAnalysis;
using Newtonsoft.Json;

namespace StardewModdingAPI.Web.Framework
{
    /// <summary>Generic metadata about a mod.</summary>
    internal class ModInfoModel
    {
        /*********
        ** Accessors
        *********/
        /// <summary>The mod name.</summary>
        public string? Name { get; private set; }

        /// <summary>The mod's web URL.</summary>
        public string? Url { get; private set; }

        /// <summary>The mod's latest version.</summary>
        public ISemanticVersion? Version { get; private set; }

        /// <summary>The mod's latest optional or prerelease version, if newer than <see cref="Version"/>.</summary>
        public ISemanticVersion? PreviewVersion { get; private set; }

        /// <summary>The mod availability status on the remote site.</summary>
        public RemoteModStatus Status { get; private set; }

        /// <summary>The error message indicating why the mod is invalid (if applicable).</summary>
        public string? Error { get; private set; }

        /// <summary>The mod page URL from which <see cref="Version"/> can be downloaded, if different from the <see cref="Url"/>.</summary>
        public string? MainModPageUrl { get; private set; }

        /// <summary>The mod page URL from which <see cref="PreviewVersion"/> can be downloaded, if different from the <see cref="Url"/>.</summary>
        public string? PreviewModPageUrl { get; private set; }


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

        /// <summary>Construct an instance.</summary>
        /// <param name="name">The mod name.</param>
        /// <param name="url">The mod's web URL.</param>
        /// <param name="version">The semantic version for the mod's latest release.</param>
        /// <param name="previewVersion">The semantic version for the mod's latest preview release, if available and different from <see cref="Version"/>.</param>
        /// <param name="status">The mod availability status on the remote site.</param>
        /// <param name="error">The error message indicating why the mod is invalid (if applicable).</param>
        [JsonConstructor]
        public ModInfoModel(string name, string url, ISemanticVersion? version, ISemanticVersion? previewVersion = null, RemoteModStatus status = RemoteModStatus.Ok, string? error = null)
        {
            this
                .SetBasicInfo(name, url)
                .SetMainVersion(version!)
                .SetPreviewVersion(previewVersion)
                .SetError(status, error!);
        }

        /// <summary>Set the basic mod info.</summary>
        /// <param name="name">The mod name.</param>
        /// <param name="url">The mod's web URL.</param>
        [MemberNotNull(nameof(ModInfoModel.Name), nameof(ModInfoModel.Url))]
        public ModInfoModel SetBasicInfo(string name, string url)
        {
            this.Name = name;
            this.Url = url;

            return this;
        }

        /// <summary>Set the mod's main version info.</summary>
        /// <param name="version">The semantic version for the mod's latest stable release.</param>
        /// <param name="modPageUrl">The mod page URL from which <paramref name="version"/> can be downloaded, if different from the <see cref="Url"/>.</param>
        [MemberNotNull(nameof(ModInfoModel.Version))]
        public ModInfoModel SetMainVersion(ISemanticVersion version, string? modPageUrl = null)
        {
            this.Version = version;
            this.MainModPageUrl = modPageUrl;

            return this;
        }

        /// <summary>Set the mod's preview version info.</summary>
        /// <param name="version">The semantic version for the mod's latest preview release.</param>
        /// <param name="modPageUrl">The mod page URL from which <paramref name="version"/> can be downloaded, if different from the <see cref="Url"/>.</param>
        public ModInfoModel SetPreviewVersion(ISemanticVersion? version, string? modPageUrl = null)
        {
            this.PreviewVersion = version;
            this.PreviewModPageUrl = modPageUrl;

            return this;
        }

        /// <summary>Set a mod error.</summary>
        /// <param name="status">The mod availability status on the remote site.</param>
        /// <param name="error">The error message indicating why the mod is invalid (if applicable).</param>
        public ModInfoModel SetError(RemoteModStatus status, string error)
        {
            this.Status = status;
            this.Error = error;

            return this;
        }
    }
}