var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);

// src/index.ts
var src_exports = {};
__export(src_exports, {
  Connection: () => Connection,
  DatabaseError: () => DatabaseError,
  Tx: () => Tx,
  connect: () => connect
});
module.exports = __toCommonJS(src_exports);

// src/format.ts
function format(query, values) {
  return Array.isArray(values) ? replacePosition(query, values) : replaceNamed(query, values);
}
function replacePosition(query, values) {
  let index = 0;
  return query.replace(/\?/g, (match) => {
    return index < values.length ? sanitize(values[index++]) : match;
  });
}
function replaceNamed(query, values) {
  return query.replace(/:(\w+)/g, (match, name) => {
    return hasOwn(values, name) ? sanitize(values[name]) : match;
  });
}
function hasOwn(obj, name) {
  return Object.prototype.hasOwnProperty.call(obj, name);
}
function sanitize(value) {
  if (value == null) {
    return "null";
  }
  if (typeof value === "number") {
    return String(value);
  }
  if (typeof value === "boolean") {
    return value ? "true" : "false";
  }
  if (typeof value === "string") {
    return quote(value);
  }
  if (Array.isArray(value)) {
    return value.map(sanitize).join(", ");
  }
  if (value instanceof Date) {
    return quote(value.toISOString().replace("Z", ""));
  }
  return quote(value.toString());
}
function quote(text) {
  return `'${escape(text)}'`;
}
var re = /[\0\b\n\r\t\x1a\\"']/g;
function escape(text) {
  return text.replace(re, replacement);
}
function replacement(text) {
  switch (text) {
    case '"':
      return '\\"';
    case "'":
      return "\\'";
    case "\n":
      return "\\n";
    case "\r":
      return "\\r";
    case "	":
      return "\\t";
    case "\\":
      return "\\\\";
    case "\0":
      return "\\0";
    case "\b":
      return "\\b";
    case "":
      return "\\Z";
    default:
      return "";
  }
}

// src/decode.ts
function cast(field, value, decoder) {
  if (value === null) {
    return null;
  }
  if (decoder[field.type]) {
    return decoder[field.type](value);
  }
  switch (field.type) {
    case "TINYINT":
    case "UNSIGNED TINYINT":
    case "SMALLINT":
    case "UNSIGNED SMALLINT":
    case "MEDIUMINT":
    case "UNSIGNED MEDIUMINT":
    case "INT":
    case "UNSIGNED INT":
    case "YEAR":
      return parseInt(value, 10);
    case "FLOAT":
    case "DOUBLE":
      return parseFloat(value);
    case "BIGINT":
    case "UNSIGNED BIGINT":
    case "DECIMAL":
    case "CHAR":
    case "VARCHAR":
    case "BINARY":
    case "VARBINARY":
    case "TINYTEXT":
    case "TEXT":
    case "MEDIUMTEXT":
    case "LONGTEXT":
    case "TINYBLOB":
    case "BLOB":
    case "MEDIUMBLOB":
    case "LONGBLOB":
    case "DATE":
    case "TIME":
    case "DATETIME":
    case "TIMESTAMP":
    case "BIT":
      return value;
    case "JSON":
      return JSON.parse(value);
    default:
      return value;
  }
}

// src/error.ts
var DatabaseError = class extends Error {
  constructor(message, status, details) {
    super(message);
    this.status = status;
    this.details = details;
  }
};

// src/version.ts
var Version = "0.0.11-beta2";

// src/serverless.ts
async function postQuery(config, body, session = "", isolationLevel = null, debug) {
  let fetchCacheOption = { cache: "no-store" };
  try {
    new Request("x:", fetchCacheOption);
  } catch (err) {
    fetchCacheOption = {};
  }
  const requestId = generateUniqueId();
  if (debug) {
    console.log(`[serverless-js debug] request id: ${requestId}`);
  }
  const url = new URL("/v1beta/sql", `https://http-${config.host}`);
  const auth = btoa(`${config.username}:${config.password}`);
  const { fetch: fetch2 } = config;
  const database = config.database ?? "";
  const headers = {
    "Content-Type": "application/json",
    "User-Agent": `serverless-js/${Version}`,
    Authorization: `Basic ${auth}`,
    "TiDB-Database": database,
    "TiDB-Session": session,
    "X-Debug-Trace-Id": requestId
  };
  if (isolationLevel) {
    headers["TiDB-Isolation-Level"] = isolationLevel;
  }
  const response = await fetch2(url.toString(), {
    method: "POST",
    body,
    headers,
    ...fetchCacheOption
  });
  if (debug) {
    const traceId = response?.headers?.get("X-Debug-Trace-Id");
    console.log(`[serverless-js debug] response id: ${traceId}`);
    const contentEncoding = response?.headers?.get("Content-Encoding");
    console.log(`[serverless-js debug] Content-Encoding: ${contentEncoding}`);
  }
  if (response.ok) {
    const resp = await response.json();
    const session2 = response.headers.get("TiDB-Session");
    resp.session = session2 ?? "";
    return resp;
  } else {
    let error;
    try {
      const e = await response.json();
      error = new DatabaseError(e.message, response.status, e);
    } catch {
      error = new DatabaseError(response.statusText, response.status, null);
    }
    throw error;
  }
}
function generateUniqueId() {
  const datetime = (/* @__PURE__ */ new Date()).toISOString().replace(/[^\d]/g, "").slice(0, 14);
  return `${datetime}${randomString(20)}`;
}
function randomString(n) {
  let result = "";
  const characters = "abcdefghijklmnopqrstuvwxyz0123456789";
  const l = characters.length;
  for (let i = 0; i < n; i++) {
    result += characters[Math.floor(Math.random() * l)];
  }
  return result;
}

// src/index.ts
var defaultExecuteOptions = {};
var Tx = class {
  constructor(conn) {
    this.conn = conn;
  }
  async execute(query, args = null, options = defaultExecuteOptions, txOptions = {}) {
    return this.conn.execute(query, args, options, txOptions);
  }
  async commit() {
    return this.conn.execute("COMMIT");
  }
  async rollback() {
    return this.conn.execute("ROLLBACK");
  }
};
var Connection = class _Connection {
  constructor(config) {
    var _a;
    this.session = null;
    this.config = { ...config };
    if (typeof fetch !== "undefined") {
      (_a = this.config).fetch || (_a.fetch = fetch);
    }
    if (config.url) {
      const url = new URL(config.url);
      if (!this.config.username) {
        this.config.username = decodeURIComponent(url.username);
      }
      if (!this.config.password) {
        this.config.password = decodeURIComponent(url.password);
      }
      if (!this.config.host) {
        this.config.host = url.hostname;
      }
      if (!this.config.database) {
        this.config.database = decodeURIComponent(url.pathname.slice(1));
      }
    }
  }
  getConfig() {
    return this.config;
  }
  async begin(txOptions = {}) {
    const conn = new _Connection(this.config);
    const tx = new Tx(conn);
    await tx.execute("BEGIN", void 0, void 0, txOptions);
    return tx;
  }
  async execute(query, args = null, options = defaultExecuteOptions, txOptions = {}) {
    const sql = args ? format(query, args) : query;
    const body = JSON.stringify({ query: sql });
    const debug = options.debug ?? this.config.debug ?? false;
    if (debug) {
      console.log(`[serverless-js debug] sql: ${sql}`);
    }
    const resp = await postQuery(
      this.config,
      body,
      this.session ?? "",
      sql == "BEGIN" ? txOptions.isolation : null,
      debug
    );
    this.session = resp?.session ?? null;
    if (this.session === null || this.session === "") {
      throw new DatabaseError("empty session, please try again", 500, null);
    }
    const arrayMode = options.arrayMode ?? this.config.arrayMode ?? false;
    const fullResult = options.fullResult ?? this.config.fullResult ?? false;
    const decoders = { ...this.config.decoders, ...options.decoders };
    const fields = resp?.types ?? [];
    const rows = resp ? parse(fields, resp?.rows ?? [], cast, arrayMode, decoders) : [];
    if (fullResult) {
      const rowsAffected = resp?.rowsAffected ?? 0;
      const lastInsertId = resp?.lastInsertID ?? null;
      const typeByName = (acc, { name, type }) => ({ ...acc, [name]: type });
      const types = fields.reduce(typeByName, {});
      return {
        statement: sql,
        types,
        rows,
        rowsAffected,
        lastInsertId,
        rowCount: rows.length
      };
    }
    return rows;
  }
};
function connect(config) {
  return new Connection(config);
}
function parseArrayRow(fields, rawRow, cast2, decoders) {
  return fields.map((field, ix) => {
    return cast2(field, rawRow[ix], decoders);
  });
}
function parseObjectRow(fields, rawRow, cast2, decoders) {
  return fields.reduce((acc, field, ix) => {
    acc[field.name] = cast2(field, rawRow[ix], decoders);
    return acc;
  }, {});
}
function parse(fields, rows, cast2, arrayMode, decode) {
  return rows.map((row) => arrayMode === true ? parseArrayRow(fields, row, cast2, decode) : parseObjectRow(fields, row, cast2, decode));
}
// Annotate the CommonJS export names for ESM import in node:
0 && (module.exports = {
  Connection,
  DatabaseError,
  Tx,
  connect
});