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

namespace StardewModdingAPI.Toolkit.Serialization.Models
{
    /// <summary>A mod dependency listed in a mod manifest.</summary>
    public class ManifestDependency : IManifestDependency
    {
        /*********
        ** Accessors
        *********/
        /// <summary>The unique mod ID to require.</summary>
        public string UniqueID { get; }

        /// <summary>The minimum required version (if any).</summary>
        public ISemanticVersion? MinimumVersion { get; }

        /// <summary>Whether the dependency must be installed to use the mod.</summary>
        public bool IsRequired { get; }


        /*********
        ** Public methods
        *********/
        /// <summary>Construct an instance.</summary>
        /// <param name="uniqueID">The unique mod ID to require.</param>
        /// <param name="minimumVersion">The minimum required version (if any).</param>
        /// <param name="required">Whether the dependency must be installed to use the mod.</param>
        public ManifestDependency(string uniqueID, string? minimumVersion, bool required = true)
            : this(
                uniqueID: uniqueID,
                minimumVersion: !string.IsNullOrWhiteSpace(minimumVersion)
                    ? new SemanticVersion(minimumVersion)
                    : null,
                required: required
            )
        { }

        /// <summary>Construct an instance.</summary>
        /// <param name="uniqueID">The unique mod ID to require.</param>
        /// <param name="minimumVersion">The minimum required version (if any).</param>
        /// <param name="required">Whether the dependency must be installed to use the mod.</param>
        [JsonConstructor]
        public ManifestDependency(string uniqueID, ISemanticVersion? minimumVersion, bool required = true)
        {
            this.UniqueID = this.NormalizeWhitespace(uniqueID);
            this.MinimumVersion = minimumVersion;
            this.IsRequired = required;
        }


        /*********
        ** Private methods
        *********/
        /// <summary>Normalize whitespace in a raw string.</summary>
        /// <param name="input">The input to strip.</param>
        [return: NotNullIfNotNull("input")]
        private string? NormalizeWhitespace(string? input)
        {
            return input?.Trim();
        }
    }
}