'use strict';

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

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

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

/* NOTE: error messages vary. Eg. for boolean-type columns, it states "for type boolean", but for integer-type columns, it starts "for integer". */
let messageRegex = /^(.+) - invalid input syntax for(?: type)? ([^:]+): "([^"]+)"$/;

module.exports = {
    error: InvalidTypeError,
    errorName: "InvalidTypeError",
    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 syntax for"))
        )
    },
    convert: function convertError(error) {
        let messageMatch = messageRegex.exec(error.message);

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

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

        let message;

        if (table != null) {
            message = `Value '${value}' is of the wrong type for a '${expectedType}'-type column (in table '${table}')`;
        } else {
            message = `Value '${value}' is of the wrong type for a '${expectedType}'-type column '${enumType}'`;
        }

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