'use strict';

const async = require('async');
const validator = require('validator');

const utils = require('../utils');
const meta = require('../meta');
const db = require('../database');
const groups = require('../groups');
const plugins = require('../plugins');

module.exports = function (User) {
	User.updateProfile = async function (uid, data) {
		let fields = [
			'username', 'email', 'fullname', 'website', 'location',
			'groupTitle', 'birthday', 'signature', 'aboutme',
		];
		if (!data.uid) {
			throw new Error('[[error:invalid-update-uid]]');
		}
		const updateUid = data.uid;

		const result = await plugins.fireHook('filter:user.updateProfile', { uid: uid, data: data, fields: fields });
		fields = result.fields;
		data = result.data;

		await validateData(uid, data);

		const oldData = await User.getUserFields(updateUid, fields);

		await async.each(fields, async function (field) {
			if (!(data[field] !== undefined && typeof data[field] === 'string')) {
				return;
			}

			data[field] = data[field].trim();

			if (field === 'email') {
				return await updateEmail(updateUid, data.email);
			} else if (field === 'username') {
				return await updateUsername(updateUid, data.username);
			} else if (field === 'fullname') {
				return await updateFullname(updateUid, data.fullname);
			}

			await User.setUserField(updateUid, field, data[field]);
		});
		plugins.fireHook('action:user.updateProfile', { uid: uid, data: data, fields: fields, oldData: oldData });
		return await User.getUserFields(updateUid, ['email', 'username', 'userslug', 'picture', 'icon:text', 'icon:bgColor']);
	};

	async function validateData(callerUid, data) {
		await isEmailAvailable(data, data.uid);
		await isUsernameAvailable(data, data.uid);
		await isWebsiteValid(callerUid, data);
		await isAboutMeValid(callerUid, data);
		await isSignatureValid(callerUid, data);
		isFullnameValid(data);
		isLocationValid(data);
		isBirthdayValid(data);
		isGroupTitleValid(data);
	}

	async function isEmailAvailable(data, uid) {
		if (!data.email) {
			return;
		}

		if (!utils.isEmailValid(data.email)) {
			throw new Error('[[error:invalid-email]]');
		}
		const email = await User.getUserField(uid, 'email');
		if (email === data.email) {
			return;
		}
		const available = await User.email.available(data.email);
		if (!available) {
			throw new Error('[[error:email-taken]]');
		}
	}

	async function isUsernameAvailable(data, uid) {
		if (!data.username) {
			return;
		}
		data.username = data.username.trim();
		const userData = await User.getUserFields(uid, ['username', 'userslug']);
		var userslug = utils.slugify(data.username);

		if (data.username.length < meta.config.minimumUsernameLength) {
			throw new Error('[[error:username-too-short]]');
		}

		if (data.username.length > meta.config.maximumUsernameLength) {
			throw new Error('[[error:username-too-long]]');
		}

		if (!utils.isUserNameValid(data.username) || !userslug) {
			throw new Error('[[error:invalid-username]]');
		}

		if (userslug === userData.userslug) {
			return;
		}
		const exists = await User.existsBySlug(userslug);
		if (exists) {
			throw new Error('[[error:username-taken]]');
		}
	}

	async function isWebsiteValid(callerUid, data) {
		if (!data.website) {
			return;
		}
		if (data.website.length > 255) {
			throw new Error('[[error:invalid-website]]');
		}
		await User.checkMinReputation(callerUid, data.uid, 'min:rep:website');
	}

	async function isAboutMeValid(callerUid, data) {
		if (!data.aboutme) {
			return;
		}
		if (data.aboutme !== undefined && data.aboutme.length > meta.config.maximumAboutMeLength) {
			throw new Error('[[error:about-me-too-long, ' + meta.config.maximumAboutMeLength + ']]');
		}

		await User.checkMinReputation(callerUid, data.uid, 'min:rep:aboutme');
	}

	async function isSignatureValid(callerUid, data) {
		if (!data.signature) {
			return;
		}
		if (data.signature !== undefined && data.signature.length > meta.config.maximumSignatureLength) {
			throw new Error('[[error:signature-too-long, ' + meta.config.maximumSignatureLength + ']]');
		}
		await User.checkMinReputation(callerUid, data.uid, 'min:rep:signature');
	}

	function isFullnameValid(data) {
		if (data.fullname && (validator.isURL(data.fullname) || data.fullname.length > 255)) {
			throw new Error('[[error:invalid-fullname]]');
		}
	}

	function isLocationValid(data) {
		if (data.location && (validator.isURL(data.location) || data.location.length > 255)) {
			throw new Error('[[error:invalid-location]]');
		}
	}

	function isBirthdayValid(data) {
		if (!data.birthday) {
			return;
		}

		const result = new Date(data.birthday);
		if (result && result.toString() === 'Invalid Date') {
			throw new Error('[[error:invalid-birthday]]');
		}
	}

	function isGroupTitleValid(data) {
		function checkTitle(title) {
			if (title === 'registered-users' || groups.isPrivilegeGroup(title)) {
				throw new Error('[[error:invalid-group-title]]');
			}
		}
		if (!data.groupTitle) {
			return;
		}
		let groupTitles = [];
		if (validator.isJSON(data.groupTitle)) {
			groupTitles = JSON.parse(data.groupTitle);
			if (!Array.isArray(groupTitles)) {
				throw new Error('[[error:invalid-group-title]]');
			}
			groupTitles.forEach(title => checkTitle(title));
		} else {
			groupTitles = [data.groupTitle];
			checkTitle(data.groupTitle);
		}
		if (!meta.config.allowMultipleBadges && groupTitles.length > 1) {
			data.groupTitle = JSON.stringify(groupTitles[0]);
		}
	}

	User.checkMinReputation = async function (callerUid, uid, setting) {
		const isSelf = parseInt(callerUid, 10) === parseInt(uid, 10);
		if (!isSelf || meta.config['reputation:disabled']) {
			return;
		}
		const reputation = await User.getUserField(uid, 'reputation');
		if (reputation < meta.config[setting]) {
			throw new Error('[[error:not-enough-reputation-' + setting.replace(/:/g, '-') + ']]');
		}
	};

	async function updateEmail(uid, newEmail) {
		let oldEmail = await User.getUserField(uid, 'email');
		oldEmail = oldEmail || '';
		if (oldEmail === newEmail) {
			return;
		}

		await db.sortedSetRemove('email:uid', oldEmail.toLowerCase());
		await db.sortedSetRemove('email:sorted', oldEmail.toLowerCase() + ':' + uid);
		await User.auth.revokeAllSessions(uid);

		await Promise.all([
			db.sortedSetAddBulk([
				['email:uid', uid, newEmail.toLowerCase()],
				['email:sorted', 0, newEmail.toLowerCase() + ':' + uid],
				['user:' + uid + ':emails', Date.now(), newEmail + ':' + Date.now()],
				['users:notvalidated', Date.now(), uid],
			]),
			User.setUserFields(uid, { email: newEmail, 'email:confirmed': 0 }),
			User.reset.cleanByUid(uid),
		]);

		if (meta.config.requireEmailConfirmation && newEmail) {
			await User.email.sendValidationEmail(uid, {
				email: newEmail,
				subject: '[[email:email.verify-your-email.subject]]',
				template: 'verify_email',
			});
		}
	}

	async function updateUsername(uid, newUsername) {
		if (!newUsername) {
			return;
		}
		const userData = await User.getUserFields(uid, ['username', 'userslug']);
		if (userData.username === newUsername) {
			return;
		}
		const newUserslug = utils.slugify(newUsername);
		const now = Date.now();
		await Promise.all([
			updateUidMapping('username', uid, newUsername, userData.username),
			updateUidMapping('userslug', uid, newUserslug, userData.userslug),
			db.sortedSetAdd('user:' + uid + ':usernames', now, newUsername + ':' + now),
		]);
		await db.sortedSetRemove('username:sorted', userData.username.toLowerCase() + ':' + uid);
		await db.sortedSetAdd('username:sorted', 0, newUsername.toLowerCase() + ':' + uid);
	}

	async function updateUidMapping(field, uid, value, oldValue) {
		if (value === oldValue) {
			return;
		}
		await db.sortedSetRemove(field + ':uid', oldValue);
		await User.setUserField(uid, field, value);
		if (value) {
			await db.sortedSetAdd(field + ':uid', uid, value);
		}
	}

	async function updateFullname(uid, newFullname) {
		const fullname = await User.getUserField(uid, 'fullname');
		await updateUidMapping('fullname', uid, newFullname, fullname);
	}

	User.changePassword = async function (uid, data) {
		if (uid <= 0 || !data || !data.uid) {
			throw new Error('[[error:invalid-uid]]');
		}
		User.isPasswordValid(data.newPassword);
		const [isAdmin, hasPassword] = await Promise.all([
			User.isAdministrator(uid),
			User.hasPassword(uid),
		]);

		if (meta.config['password:disableEdit'] && !isAdmin) {
			throw new Error('[[error:no-privileges]]');
		}
		let isAdminOrPasswordMatch = false;
		const isSelf = parseInt(uid, 10) === parseInt(data.uid, 10);
		if (
			(isAdmin && !isSelf) || // Admins ok
			(!hasPassword && isSelf)	// Initial password set ok
		) {
			isAdminOrPasswordMatch = true;
		} else {
			isAdminOrPasswordMatch = await User.isPasswordCorrect(uid, data.currentPassword, data.ip);
		}

		if (!isAdminOrPasswordMatch) {
			throw new Error('[[user:change_password_error_wrong_current]]');
		}

		const hashedPassword = await User.hashPassword(data.newPassword);
		await Promise.all([
			User.setUserFields(data.uid, {
				password: hashedPassword,
				rss_token: utils.generateUUID(),
			}),
			User.reset.updateExpiry(data.uid),
			User.auth.revokeAllSessions(data.uid),
		]);

		plugins.fireHook('action:password.change', { uid: uid, targetUid: data.uid });
	};
};