using System;

namespace SourceGit.Commands
{
    public class QuerySingleCommit : Command
    {
        public QuerySingleCommit(string repo, string sha)
        {
            WorkingDirectory = repo;
            Context = repo;
            Args = $"show --no-show-signature --decorate=full --format=%H%n%P%n%D%n%aN±%aE%n%at%n%cN±%cE%n%ct%n%s -s {sha}";
        }

        public Models.Commit Result()
        {
            var rs = ReadToEnd();
            if (rs.IsSuccess && !string.IsNullOrEmpty(rs.StdOut))
            {
                var commit = new Models.Commit();
                var lines = rs.StdOut.Split('\n');
                if (lines.Length < 8)
                    return null;

                commit.SHA = lines[0];
                if (!string.IsNullOrEmpty(lines[1]))
                    commit.Parents.AddRange(lines[1].Split(' ', StringSplitOptions.RemoveEmptyEntries));
                if (!string.IsNullOrEmpty(lines[2]))
                    commit.ParseDecorators(lines[2]);
                commit.Author = Models.User.FindOrAdd(lines[3]);
                commit.AuthorTime = ulong.Parse(lines[4]);
                commit.Committer = Models.User.FindOrAdd(lines[5]);
                commit.CommitterTime = ulong.Parse(lines[6]);
                commit.Subject = lines[7];

                return commit;
            }

            return null;
        }
    }
}
