'use strict';

const { create } = require("error-chain");
const pgErrorCodes = require("pg-error-codes");

const DatabaseError = require("../database-error.js");
const getTable = require("../get-table");

let EnumError = create("EnumError", { inheritsFrom: DatabaseError });

let messageRegex = /^(.+) - invalid input value for enum ([^:]+): "([^"]+)"$/;

module.exports = {
	error: EnumError,
	errorName: "EnumError",
	check: function checkType(error) {
		return (
		// PostgreSQL (via `pg`):
			(error.length != null && error.file != null && error.line != null && error.routine != null && error.code === "22P02" && error.message.includes("invalid input value for enum"))
		);
	},
	convert: function convertError(error) {
		let messageMatch = messageRegex.exec(error.message);

		if (messageMatch == null) {
			throw new Error("Encountered unknown error format");
		}

		let [_, query, enumType, value] = messageMatch;
		let table = getTable(query);

		let message;

		if (table != null) {
			message = `Value '${value}' is not an allowed value for the ENUM type '${enumType}' (in table '${table}')`;
		} else {
			message = `Value '${value}' is not an allowed value for the ENUM type '${enumType}'`;
		}

		return new EnumError(message, {
			originalError: error,
			pgCode: error.code,
			code: pgErrorCodes[error.code],
			query: query,
			table: table,
			enumType: enumType,
			value: value
		});
	}
};