using System;
using System.Collections.Generic;

namespace SourceGit.Commands {
    public static class Discard {
        public static void All(string repo) {
            new Reset(repo, "HEAD", "--hard").Exec();
            new Clean(repo).Exec();
        }

        public static void ChangesInWorkTree(string repo, List<Models.Change> changes) {
            var needClean = new List<string>();
            var needCheckout = new List<string>();

            foreach (var c in changes) {
                if (c.WorkTree == Models.ChangeState.Untracked || c.WorkTree == Models.ChangeState.Added) {
                    needClean.Add(c.Path);
                } else {
                    needCheckout.Add(c.Path);
                }
            }

            for (int i = 0; i < needClean.Count; i += 10) {
                var count = Math.Min(10, needClean.Count - i);
                new Clean(repo, needClean.GetRange(i, count)).Exec();
            }

            for (int i = 0; i < needCheckout.Count; i += 10) {
                var count = Math.Min(10, needCheckout.Count - i);
                new Checkout(repo).Files(needCheckout.GetRange(i, count));
            }
        }

        public static void ChangesInStaged(string repo, List<Models.Change> changes) {
            for (int i = 0; i < changes.Count; i += 10) {
                var count = Math.Min(10, changes.Count - i);
                var files = new List<string>();
                for (int j = 0; j < count; j++) files.Add(changes[i + j].Path);
                new Restore(repo, files, "--staged --worktree").Exec();
            }
        }
    }
}