'use strict';

const createError = require("create-error");
const pgErrorCodes = require("pg-error-codes");

const DatabaseError = require("../database-error.js");
const getValues = require("../get-values");

let NotNullConstraintViolationError = createError(DatabaseError, "NotNullConstraintViolationError");

let messageRegex = /^(.+) - null value in column "([^"]+)" violates not-null constraint$/;

module.exports = {
    error: NotNullConstraintViolationError,
    errorName: "NotNullConstraintViolationError",
    check: function checkType(error) {
        return (
            // PostgreSQL (via `pg`):
            (error.length != null && error.file != null && error.line != null && error.routine != null && error.code === "23502")
        )
    },
    convert: function convertError(error) {
        let [_, query, column] = messageRegex.exec(error.message);

        return new NotNullConstraintViolationError(`Missing required value for column '${error.column}' in table '${error.table}'`, {
            originalError: error,
            pgCode: error.code,
            code: pgErrorCodes[error.code],
            schema: error.schema,
            table: error.table,
            column: error.column,
            values: getValues(error.detail),
            query: query
        });
    }
};