using System.Text;

namespace etoy
{
    class TSKeyValueTableGenerater : IGenerater
    {
        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.ts";
            string directory = context.Option.ServerCodeOutput;
            string path = Path.Combine(directory, fileName);

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

            //using var writer = new TSCodeWriter(path);
            var sb = new StringBuilder();
            sb.AppendLine("// Generate By EToy");
            sb.AppendLine("// Don't Edit It!!");
            sb.AppendLine();
            // class
            sb.AppendLine("export default class KeyValue {");
            {
                for (int i = 0, length = table.Rows.Length; i < length; i++)
                {
                    var row = table.Rows[i];
                    if (!row.IsServerField)
                        continue;

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

                    // summary

                    sb.AppendLine("    /**");
                    sb.AppendLine($"     * {summary}");
                    sb.AppendLine($"     * {content}");
                    sb.AppendLine("    */");
                    // field
                    var fieldValue = string.Empty;
                    var repeadIdx = fieldType.IndexOf(FIELD_REPEATED);
                    if (repeadIdx > 0)
                    { // 是数组类型
                        fieldValue = content;
                    }
                    else
                    {
                        switch (fieldType)
                        {
                            case FieldTypeDefine.Boolean:
                                fieldValue = (content == "1" || content == "true") ? "true" : "false";
                                break;
                            case FieldTypeDefine.Int:
                            case FieldTypeDefine.Long:
                            case FieldTypeDefine.Float:
                            case FieldTypeDefine.Double:
                                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TS代码生成失败, 不支持string/int外的类型{row.Type}字段。{table.Path}");
                        }
                    }
                    
                    sb.AppendLine($"    public static {fieldName} = {fieldValue};");
                    // enter
                    if (i < length - 1)
                        sb.AppendLine();
                }
                sb.AppendLine("}");
            }
            File.WriteAllText(path, sb.ToString(), Encoding.UTF8);
        }
    }
}