import 'dart:convert';

class OdooRpcHelper {
  static const String _jsonRpcVersion = "2.0";
  static const String _method = "call";

  static Map<String, dynamic> buildLogout({
    required String service,
    required String db,
    required int uid,
    required String password,
    required String model,
    required String method,
    List<dynamic> domain = const [],
    Map<String, dynamic> kwargs = const {},
  }) {
    // Make sure domain is always a list of lists (even if empty)
    final safeDomain = domain.isEmpty ? [[]] : domain;

    return {
      "jsonrpc": _jsonRpcVersion,
      "method": _method,
      "params": {
        "service": service,
        "method": "logout",
        "args": [
          db,
          uid,
          password,
          model,
          method,
          safeDomain,
          kwargs,
        ],
      },
      "id": DateTime.now().millisecondsSinceEpoch,
    };
  }
  /// Builds the correct JSON-RPC payload for any Odoo model method
  static Map<String, dynamic> buildExecuteKw({
    required String service,
    required String db,
    required int uid,
    required String password,
    required String model,
    required String method,
    List<dynamic> domain = const [],
    Map<String, dynamic> kwargs = const {},
  }) {
    // Make sure domain is always a list of lists (even if empty)
    final safeDomain = domain.isEmpty ? [[]] : domain;

    return {
      "jsonrpc": _jsonRpcVersion,
      "method": _method,
      "params": {
        "service": service,
        "method": "execute_kw",
        "args": [
          db,
          uid,
          password,
          model,
          method,
          safeDomain,
          kwargs,
        ],
      },
      "id": DateTime.now().millisecondsSinceEpoch,
    };
  }

  /// Convenience wrapper for search_read
  static Map<String, dynamic> searchRead({
    required String db,
    required int uid,
    required String password,
    required String model,
    List<dynamic> domain = const [],
    List<String> fields = const [],
    int? limit,
    int? offset,
    String? order,
  }) {
    final kwargs = <String, dynamic>{};

    if (fields.isNotEmpty) kwargs["fields"] = fields;
    if (limit != null) kwargs["limit"] = limit;
    if (offset != null) kwargs["offset"] = offset;
    if (order != null) kwargs["order"] = order;

    return buildExecuteKw(
      service: "object",
      db: db,
      uid: uid,
      password: password,
      model: model,
      method: "search_read",
      domain: domain,
      kwargs: kwargs,
    );
  }

  static Map<String, dynamic> executeKw({
    required String method,
    required String db,
    required int uid,
    required String password,
    required String model,
    List<dynamic> domain = const [],
    List<String> fields = const [],
    int? limit,
    int? offset,
    String? order,
  }) {
    final kwargs = <String, dynamic>{};

    if (fields.isNotEmpty) kwargs["fields"] = fields;
    if (limit != null) kwargs["limit"] = limit;
    if (offset != null) kwargs["offset"] = offset;
    if (order != null) kwargs["order"] = order;

    return buildExecuteKw(
      service: "object",
      db: db,
      uid: uid,
      password: password,
      model: model,
      method: method,
      domain: domain,
      kwargs: kwargs,
    );
  }

  /// Convenience wrapper for create
  static Map<String, dynamic> create({
    required String db,
    required int uid,
    required String password,
    required String model,
    required Map<String, dynamic> values,
  }) {
    return buildExecuteKw(
      service: "object",
      db: db,
      uid: uid,
      password: password,
      model: model,
      method: "create",
      domain: [[]], // create doesn't use domain
      kwargs: {"vals": values}, // Odoo expects 'vals' for create in some versions
    );
  }
}