'use strict';
const {methodCallSelector, not} = require('./selectors/index.js');
const {appendArgument} = require('./fix/index.js');

const MESSAGE_ID = 'require-number-to-fixed-digits-argument';
const messages = {
	[MESSAGE_ID]: 'Missing the digits argument.',
};

const mathToFixed = [
	methodCallSelector({
		method: 'toFixed',
		argumentsLength: 0,
	}),
	not('[callee.object.type="NewExpression"]'),
].join('');

/** @param {import('eslint').Rule.RuleContext} context */
const create = context => {
	const sourceCode = context.getSourceCode();
	return {
		[mathToFixed](node) {
			const [
				openingParenthesis,
				closingParenthesis,
			] = sourceCode.getLastTokens(node, 2);

			return {
				loc: {
					start: openingParenthesis.loc.start,
					end: closingParenthesis.loc.end,
				},
				messageId: MESSAGE_ID,
				/** @param {import('eslint').Rule.RuleFixer} fixer */
				fix: fixer => appendArgument(fixer, node, '0', sourceCode),
			};
		},
	};
};

/** @type {import('eslint').Rule.RuleModule} */
module.exports = {
	create,
	meta: {
		type: 'suggestion',
		docs: {
			description: 'Enforce using the digits argument with `Number#toFixed()`.',
		},
		fixable: 'code',
		messages,
	},
};