using System.Collections.Generic;
using System.Linq;
using Microsoft.CodeAnalysis;

namespace Ariadne.Generator
{
    public class GeneratedArc
    {
        public readonly INamedTypeSymbol Type;

        /// <summary>
        /// This field holds the script, or the class of passages with no Run, or null for an arc that only saves
        /// fields.
        /// </summary>
        public readonly ScriptClass Script;

        public readonly List<SavedMember> Fields;

        public GeneratedArc(INamedTypeSymbol type, ScriptClass script, List<SavedMember> fields)
        {
            Type = type;
            Script = script;
            Fields = fields;
        }

        /// <summary>
        /// Gets the path of the original non-code-behind file.
        /// </summary>
        public string FilePath
        {
            get
            {
                // The code-behind sits beside the file with Run in it, if the class has one.
                if (Script != null && Script.Run != null)
                {
                    return Script.Methods[Script.Run].SyntaxTree.FilePath;
                }

                return Type.DeclaringSyntaxReferences.First().SyntaxTree.FilePath;
            }
        }
    }
}