namespace etoy
{
    class CSharpKeyValueTableGenerater : IGenerater
    {
        //private const string CLASS_TAIL = "Table"; // C# Table作为类型后缀
        public void Generate(Context context)
        {
            var tables = context.Blackboard.KeyValueTables;

            foreach (var table in tables)
                GenSingle(context, table);
        }
        void GenSingle(Context context, KeyValueTable table)
        {
            const string FIELD_REPEATED = "[]";

            string fileName = "KeyValue.cs";
            string directory = context.Option.ClientCodeOutput;
            string path = Path.Combine(directory, fileName);

            if (!Directory.Exists(directory))
                Directory.CreateDirectory(directory);

            using CodeWriter writer = new CodeWriter(path);

            writer.WriteLine("// Generate By EToy");
            writer.WriteLine("// Don't Edit It!!");
            writer.WriteLine();
            // namespace
            writer.Bracket("namespace XGame.Database");
            {
                // class
                writer.Bracket($"public static class KeyValue");
                {
                    for (int i = 0, length = table.Rows.Length; i < length; i++)
                    {
                        var row = table.Rows[i];
                        if (!row.IsClientField)
                            continue;

                        string summary = row.Description;
                        string fieldType = row.Type;
                        string fieldName = row.Key;
                        string content = row.Value;

                        // summary
                        writer.Summary(summary);
                        writer.Summary(content);
                        // field
                        var fieldValue = string.Empty;
                        var repeadIdx = fieldType.IndexOf(FIELD_REPEATED);
                        if (repeadIdx > 0)
                        { // 是数组类型
                            fieldValue = content.Replace("[", "{").Replace("]", "}");
                        }
                        else
                        {
                            switch (fieldType)
                            {
                                case FieldTypeDefine.Boolean:
                                    fieldValue = (content == "1" || content == "true") ? "true" : "false";
                                    break;
                                case FieldTypeDefine.Int:
                                    fieldValue = content;
                                    break;
                                case FieldTypeDefine.Long:
                                    fieldValue = content;
                                    break;
                                case FieldTypeDefine.String:
                                    fieldValue = content.Replace("\"", "\\\""); // "前面多加个反斜杠
                                    fieldValue = $"\"{fieldValue}\"";
                                    break;

                                default:
                                    throw new NotSupportedException($"KeyValue表C#代码生成失败, 不支持string/int外的类型{row.Type}字段。{table.Path}");
                            }
                        }
                        
                        writer.WriteLine($"public static readonly {fieldType} {fieldName} = {fieldValue};");
                        // enter
                        if (i < length - 1)
                            writer.WriteLine();
                    }
                    writer.EndBracket();
                }
                writer.EndBracket();
            }
        }
    }
}