'use strict';

const { create } = require("error-chain");
const pgErrorCodes = require("pg-error-codes");
const DatabaseError = require("../database-error.js");

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

let detailsRegex = /^Key \(([^\)]+)\)=\(([^\)]+)\) is not present in table "([^"]+)"\.$/;

module.exports = {
	error: ForeignKeyConstraintViolationError,
	errorName: "ForeignKeyConstraintViolationError",
	check: function checkType(error) {
		return (
		// PostgreSQL (via `pg`):
			(error.length != null && error.file != null && error.line != null && error.routine != null && error.code === "23503")
		);
	},
	convert: function convertError(error) {
		let [_, column, value, foreignTable] = detailsRegex.exec(error.detail);

		return new ForeignKeyConstraintViolationError(`Value for column '${column}' in table '${error.table}' refers to a non-existent key '${value}' in table '${foreignTable}'`, {
			originalError: error,
			pgCode: error.code,
			code: pgErrorCodes[error.code],
			schema: error.schema,
			table: error.table,
			foreignTable: foreignTable,
			column: column,
			value: value,
			constraint: error.constraint
		});
	}
};