/*
 * Copyright (c) 2010-2018 Tim Düsterhus.
 *
 * Use of this software is governed by the Business Source License
 * included in the LICENSE file.
 *
 * Change Date: 2024-11-01
 *
 * On the date above, in accordance with the Business Source
 * License, use of this software will be governed by version 2
 * or later of the General Public License.
 */

define([ 'WoltLabSuite/Core/User'
       , 'WoltLabSuite/Core/StringUtil'
       , './Helper'
       ], function (CoreUser, StringUtil, Helper) {
	"use strict";

	const u = Symbol('user')

	/**
	 * Represents a user.
	 */
	class User {
		constructor(user) {
			this[u] = Helper.deepFreeze(user)
			
			Object.getOwnPropertyNames(this[u]).forEach(key => {
				if (this[key]) {
					throw new Error('Attempting to override existing property')
				}

				Object.defineProperty(this, key, { value: this[u][key]
				                                 , enumerable: true
				                                 })
			})
		}

		get coloredUsername() {
			// No color
			if (this.color1 === null && this.color2 === null) return this.username

			// Single color
			if (this.color1 === this.color2) return `<span style="color: ${Helper.intToRGBHex(this.color1)};">${StringUtil.escapeHTML(this.username)}</span>`

			// Gradient
			const r1 = (this.color1 >> 16) & 0xFF
			const r2 = (this.color2 >> 16) & 0xFF
			const g1 = (this.color1 >>  8) & 0xFF
			const g2 = (this.color2 >>  8) & 0xFF
			const b1 =  this.color1 & 0xFF
			const b2 =  this.color2 & 0xFF

			const steps = this.username.length - 1
			const r = (r1 - r2) / steps
			const g = (g1 - g2) / steps
			const b = (b1 - b2) / steps

			return this[u].username.split('').map((letter, index) => {
				const R = Math.round(r1 - index * r)
				const G = Math.round(g1 - index * g)
				const B = Math.round(b1 - index * b)

				return `<span style="color: rgb(${R}, ${G}, ${B})">${StringUtil.escapeHTML(letter)}</span>`
			}).join('')
		}

		get self() {
			return this.userID === CoreUser.userId
		}

		static getGuest(username) {
			const payload = { username
			                , userID: null
			                , color1: null
			                , color2: null
			                }

			return new User(payload)
		}

		wrap() {
			return { user: this[u] }
		}

		toJSON() {
			return this[u]
		}
	}

	return User
});