const {q, ElemJS, ejs} = require("./basic.js")
const {store} = require("./store/store.js")
const {SubscribeMapList} = require("./store/subscribe_map_list.js")
const {SubscribeValue} = require("./store/subscribe_value.js")
const {Timeline} = require("./timeline.js")
const lsm = require("./lsm.js")
const {resolveMxc} = require("./functions.js")

class ActiveGroupMarker extends ElemJS {
	constructor() {
		super(q("#c-group-marker"))
		store.activeGroup.subscribe("changeSelf", this.render.bind(this))
	}

	render() {
		if (store.activeGroup.exists()) {
			const group = store.activeGroup.value()
			this.style("opacity", 1)
			this.style("transform", `translateY(${group.element.offsetTop}px)`)
		} else {
			this.style("opacity", 0)
		}
	}
}

const activeGroupMarker = new ActiveGroupMarker()

class Group extends ElemJS {
	constructor(key, data) {
		super("div")

		this.data = data
		this.order = this.data.order

		this.class("c-group")
		this.child(
			(this.data.icon
			 ? ejs("img").class("c-group__icon").attribute("src", this.data.icon)
			 : ejs("div").class("c-group__icon")
			),
			ejs("div").class("c-group__name").text(this.data.name)
		)

		this.on("click", this.onClick.bind(this))

		store.activeGroup.subscribe("changeSelf", this.render.bind(this))
	}

	render() {
		const active = store.activeGroup.value() === this
		this.element.classList[active ? "add" : "remove"]("c-group--active")
	}

	onClick() {
		store.activeGroup.set(this)
	}
}

class Room extends ElemJS {
	constructor(id, data) {
		super("div")

		this.id = id
		this.data = data
		this.timeline = new Timeline(this)
		this.group = null
		this.members = new SubscribeMapList(SubscribeValue)

		this.class("c-room")

		this.on("click", this.onClick.bind(this))
		store.activeRoom.subscribe("changeSelf", this.render.bind(this))

		this.render()
	}

	get order() {
		if (this.group) {
			let chars = 36
			let total = 0
			const name = this.getName()
			for (let i = 0; i < name.length; i++) {
				const c = name[i]
				let d = 0
				if (c >= "A" && c <= "Z") d = c.charCodeAt(0) - 65 + 10
				else if (c >= "a" && c <= "z") d = c.charCodeAt(0) - 97 + 10
				else if (c >= "0" && c <= "9") d = +c
				total += d * chars ** (-i)
			}
			return total
		} else {
			return -this.timeline.latest
		}
	}

	getName() {
		// if the room has a name
		let name = this.data.state.events.find(e => e.type === "m.room.name")
		if (name && name.content.name) {
			return name.content.name
		}
		// if the room has no name, use its canonical alias
		let canonicalAlias = this.data.state.events.find(e => e.type === "m.room.canonical_alias")
		if (canonicalAlias && canonicalAlias.content.alias) {
			return canonicalAlias.content.alias
		}
		// if the room has no alias, use the names of its members ("heroes")
		const users = this.data.summary["m.heroes"]
		if (users && users.length) {
			const usernames = users.map(u => {
				// if the member is in the room, use their display name
				if (this.members.has(u)) {
					const displayname = this.members.get(u).value().content.displayname
					if (displayname) {
						return displayname
					}
				}
				// we don't have the member, so extract the localpart from the mxid
				const match = u.match(/^@([^:]+):/)
				if (match) {
					return match[1]
				}
				// localpart extraction failed, use the whole mxid
				return u
			})
			return usernames.join(", ")
		}
		// the room is empty
		return "Empty room"
	}

	getIcon() {
		// if the room has a normal avatar
		const avatar = this.data.state.events.find(e => e.type === "m.room.avatar")
		if (avatar) {
			const url = avatar.content.url || avatar.content.avatar_url
			if (url) {
				return resolveMxc(url, 32, "crop")
			}
		}
		// if the room has no avatar set, use a member's avatar
		const users = this.data.summary["m.heroes"]
		if (users && users[0] && this.members.has(users[0])) {
			// console.log(users[0], this.members.get(users[0]))
			const userAvatar = this.members.get(users[0]).value().content.avatar_url
			if (userAvatar) {
				return resolveMxc(userAvatar, 32, "crop")
			}
		}
		return null
	}

	isDirect() {
		return store.directs.has(this.id)
	}

	setGroup(id) {
		this.group = id
	}

	getGroup() {
		if (this.group) {
			return store.groups.get(this.group).value()
		} else {
			return this.isDirect() ? store.groups.get("directs").value() : store.groups.get("channels").value()
		}
	}

	onClick() {
		store.activeRoom.set(this)
	}

	render() {
		this.clearChildren()
		// data
		const icon = this.getIcon()
		if (icon) {
			this.child(ejs("img").class("c-room__icon").attribute("src", icon))
		} else {
			this.child(ejs("div").class("c-room__icon", "c-room__icon--no-icon"))
		}
		this.child(ejs("div").class("c-room__name").text(this.getName()))
		// active
		const active = store.activeRoom.value() === this
		this.element.classList[active ? "add" : "remove"]("c-room--active")
	}
}

class Rooms extends ElemJS {
	constructor() {
		super(q("#c-rooms"))

		this.roomData = []
		this.rooms = []

		store.rooms.subscribe("askAdd", this.askAdd.bind(this))
		store.rooms.subscribe("addItem", this.addItem.bind(this))
		// store.rooms.subscribe("changeItem", this.render.bind(this))
		store.activeGroup.subscribe("changeSelf", this.render.bind(this))
		store.directs.subscribe("changeItem", this.render.bind(this))
		store.newEvents.subscribe("changeSelf", this.sort.bind(this))

		this.render()
	}

	sort() {
		store.rooms.sort()
		this.render()
	}

	askAdd(event, {key, data}) {
		const room = new Room(key, data)
		store.rooms.addEnd(key, room)
	}

	addItem(event, key) {
		const room = store.rooms.get(key).value()
		if (room.getGroup() === store.activeGroup.value()) {
			this.child(room)
		}
	}

	render() {
		this.clearChildren()
		let first = null
		// set room list
		store.rooms.forEach((id, room) => {
			if (room.value().getGroup() === store.activeGroup.value()) {
				if (!first) first = room.value()
				this.child(room.value())
			}
		})
		// if needed, change the active room to be an item in the room list
		if (!store.activeRoom.exists() || store.activeRoom.value().getGroup() !== store.activeGroup.value()) {
			if (first) {
				store.activeRoom.set(first)
			} else {
				store.activeRoom.delete()
			}
		}
	}
}
const rooms = new Rooms()

class Groups extends ElemJS {
	constructor() {
		super(q("#c-groups-list"))

		store.groups.subscribe("askAdd", this.askAdd.bind(this))
		store.groups.subscribe("changeItem", this.render.bind(this))
	}

	askAdd(event, {key, data}) {
		const group = new Group(key, data)
		store.groups.addEnd(key, group)
		store.groups.sort()
	}

	render() {
		this.clearChildren()
		store.groups.forEach((key, item) => {
			this.child(item.value())
		})
	}
}
const groups = new Groups()