using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace XWorld.PublishTool
{
    public sealed class FilesManifest
    {
        public sealed class Entry { public string Md5; public int Size; }
        public Dictionary<string, Entry> Entries { get; } = new Dictionary<string, Entry>();

        public void Add(string name, string md5, int size) => Entries[name] = new Entry { Md5 = md5, Size = size };

        // 行格式沿用 dllfiles：{'name','md5',size},\n（按 name 排序，保证确定性）
        public string Render()
        {
            var sb = new StringBuilder();
            foreach (var kv in Entries.OrderBy(e => e.Key, System.StringComparer.Ordinal))
                sb.Append("{'").Append(kv.Key).Append("','").Append(kv.Value.Md5).Append("',").Append(kv.Value.Size).Append("},\n");
            return sb.ToString();
        }

        public static FilesManifest Parse(string text)
        {
            var m = new FilesManifest();
            if (string.IsNullOrEmpty(text)) return m;
            foreach (var raw in text.Split('\n'))
            {
                string line = raw.Trim();
                int lb = line.IndexOf('{'); int rb = line.LastIndexOf('}');
                if (lb < 0 || rb <= lb) continue;
                string inner = line.Substring(lb + 1, rb - lb - 1).Replace("'", "");
                string[] p = inner.Split(',');
                if (p.Length < 3) continue;
                int.TryParse(p[2].Trim(), out int size);
                m.Add(p[0].Trim(), p[1].Trim(), size);
            }
            return m;
        }

        // 稳定摘要：排序后的 name+md5 串（用于签名）
        public string Digest()
        {
            var sb = new StringBuilder();
            foreach (var kv in Entries.OrderBy(e => e.Key, System.StringComparer.Ordinal))
                sb.Append(kv.Key).Append('=').Append(kv.Value.Md5).Append(';');
            return sb.ToString();
        }
    }
}