using System.Text.RegularExpressions;

namespace Convention.RScript.Matcher
{
    public class DefineVariableMatcher : IRSentenceMatcher
    {
        private readonly Regex DefineVariableRegex = new(@"(string|int|double|float|bool|var)\s+([a-zA-Z_][a-zA-Z0-9_]*)\s*=\s*(.+)");
        private readonly Regex DeclareVariableRegex = new(@"(string|int|double|float|bool|var)\s+([a-zA-Z_][a-zA-Z0-9_]*)");

        public bool Match(string expression, ref RScriptSentence sentence)
        {
            {
                var DefineVariableMatch = DefineVariableRegex.Match(expression);
                if (DefineVariableMatch.Success)
                {
                    sentence.mode = RScriptSentence.Mode.DefineVariable;
                    sentence.info = new() { DefineVariableMatch.Groups[1].Value, DefineVariableMatch.Groups[2].Value, DefineVariableMatch.Groups[3].Value };
                    return true;
                }
            }
            {
                var DeclareVariableMatch = DeclareVariableRegex.Match(expression);
                if (DeclareVariableMatch.Success)
                {
                    sentence.mode = RScriptSentence.Mode.DefineVariable;
                    sentence.info = new() { DeclareVariableMatch.Groups[1].Value, DeclareVariableMatch.Groups[2].Value, null };
                    return true;
                }
            }
            return false;
        }
    }
}