import { MatrixUser } from "./MatrixUser.js";
import { IRCServer } from "./Server.js";

export class Channel {
    public name: string
    // <nick, MatrixUser>
    public matrixUsers: Map<string, MatrixUser>
    // <nick, PL number>
    public powerLevels: Map<string, number>
    public topic: Map<string, string>;
    public channelModes: Map<string, string>;
    public eventIDsSeen: Set<string>;
    public historyVisibility: string
    public guestAccess: string
    public joinRules: string
    public roomVersion: number
    public roomType: string
    private syncLocks: Set<string>
    constructor(public roomId: string, private server: IRCServer) {
        this.name = roomId;
        this.matrixUsers = new Map();
        this.powerLevels = new Map();
        this.topic = new Map([['text', ''], ['timestamp', '0'], ['setter', 'matrix']]);
        this.channelModes = new Map([['n', '']]);
        this.eventIDsSeen = new Set();
        this.historyVisibility = "";
        this.guestAccess = "";
        this.joinRules = "";
        this.roomVersion = 0;
        this.roomType = "";
        this.syncLocks = new Set();
        this.syncLocks.add('isDM');
        this.doInitialSync();
    }

    isSynced() {
        return this.syncLocks.size === 0;
    }

    addSyncLock(name: string) {
        this.syncLocks.add(name);
    }

    delSyncLock(name: string) {
        this.syncLocks.delete(name);
        if (this.syncLocks.size === 1) {
            if (this.matrixUsers.size === 2 && this.name === this.roomId) {
                const otherUser = [...this.matrixUsers.values()].filter(m => m.mxid !== this.server.mxid);
                const directRoomsForUser = this.server.directRooms.get(otherUser[0].mxid);
                if (directRoomsForUser && directRoomsForUser.includes(this.roomId))
                    this.name = `&${otherUser[0].mxid.substring(1)}`
            }
            this.syncLocks.delete('isDM');
            this.server.finishChannelSync(this);
        }
    }

    doInitialSync() {
        this.addSyncLock("m.room.create");
        this.server.apiCall.get(`/rooms/${this.roomId}/state/m.room.create`).then(response => {
            this.roomType = response.data?.type || "";
            if (this.roomType === "m.space")
                this.channelModes.set("S", "");
            this.roomVersion = response.data?.room_version || 0;
            this.delSyncLock("m.room.create")
        }).catch(e => {
            const errcode = e.response?.data?.errcode;
            if (errcode !== "M_NOT_FOUND")
                this.server.doLog(e);
            this.delSyncLock("m.room.create")
        })
        this.addSyncLock("m.room.canonical_alias");
        this.server.apiCall.get(`/rooms/${this.roomId}/state/m.room.canonical_alias`).then(response => {
            const canonical_alias = response.data["alias"];
            if (canonical_alias) {
                this.name = canonical_alias;
            }
            this.delSyncLock("m.room.canonical_alias")
        }).catch(e => {
            const errcode = e.response?.data?.errcode;
            if (errcode !== "M_NOT_FOUND")
                this.server.doLog(e);
            this.delSyncLock("m.room.canonical_alias")
        })
        this.addSyncLock("m.room.topic");
        this.server.apiCall.get(`/rooms/${this.roomId}/state/m.room.topic`).then(response => {
            this.delSyncLock("m.room.topic")
            const topicText = response.data["topic"];
            if (!topicText || this.topic.get("text") !== "")
                return;
            this.topic.set("text", topicText.replace(/\r\n|\r|\n/g, " "));
            this.topic.set("timestamp", Date.now().toString(10).substring(0, 10));
            this.topic.set('setter', "matrix");
        }).catch(e => {
            const errcode = e.response?.data?.errcode;
            if (errcode !== "M_NOT_FOUND")
                this.server.doLog(`${this.roomId}: ${e}`);
            this.delSyncLock("m.room.topic")
        })
        this.addSyncLock("m.room.members");
        this.server.apiCall.get(`/rooms/${this.roomId}/joined_members`).then(response => {
            const allMembers = response.data["joined"];
            const allMxids = Object.keys(allMembers);
            if (allMxids.length > this.server.config["lazyLoadLimit"]) {
                this.channelModes.set('u', '');
            } else {
                for (const member of allMxids) {
                    const nextMatrixUser = this.server.getOrCreateMatrixUser(member);
                    this.matrixUsers.set(nextMatrixUser.nick, nextMatrixUser);
                }
            }
            this.delSyncLock("m.room.members")
        }).catch(e => {
            const errcode = e.response?.data?.errcode;
            if (errcode !== "M_NOT_FOUND")
                this.server.doLog(e);
            this.delSyncLock("m.room.members")
        })
        this.addSyncLock("m.room.power_levels")
        this.server.apiCall.get(`/rooms/${this.roomId}/state/m.room.power_levels`).then(response => {
            this.delSyncLock("m.room.power_levels")
            const users = response.data["users"];
            if (!users)
                return;
            for (const [mxid, pl] of Object.entries(users)) {
                const nextMatrixUser = this.server.getOrCreateMatrixUser(mxid);
                this.matrixUsers.set(nextMatrixUser.nick, nextMatrixUser);
                const numPl = Number(pl);
                if (numPl > 0)
                    this.powerLevels.set(nextMatrixUser.nick, numPl);
            }
        }).catch(e => {
            const errcode = e.response?.data?.errcode;
            if (errcode !== "M_NOT_FOUND")
                this.server.doLog(e);
            this.delSyncLock("m.room.power_levels")
        })
    }

    

    getNickPowerLevelMapping(nick: string): string {
        let opStatus = '';
        const pl = this.powerLevels.get(nick) || 0;
        if (pl > 99) {
            opStatus = '@';
        }
        else if (pl > 49) {
            opStatus = '%';
        }
        else if (pl > 0) {
            opStatus = '+';
        }
        return opStatus;
    }
}