import Logging from "@proxnet/undead-logging";
import type KV from "../../persistence/kv.ts";
import { type ServerBase } from "../../server.ts";
import { DatabaseRoom, FactoryMode, GalvanicTagDTO, HardwareSupports, RoomAccessibility, RoomDataTypes, RoomState, TagDTO, TagType, WriteMode } from "./RoomDataTypes.ts";
import { SubroomFactory } from "./SubroomFactory.ts";
import { ServerRoomsBase } from "../base.ts";

const log = new Logging("RoomFactory");

const roomDebug = false;

interface FactoryOptionsBase {
    mode: FactoryMode,
    id: number,
    name?: string
}
export interface WriteFactoryOptions extends FactoryOptionsBase {
    mode: FactoryMode.Write,
    writeMode: WriteMode,
}
export interface FetchFactoryOptions extends FactoryOptionsBase {
    mode: FactoryMode.Fetch
}
export type FactoryOptions = WriteFactoryOptions | FetchFactoryOptions;

export class RoomFactory {

    static roomsKey = "rooms";

    #server: ServerBase;
    #kv: KV;

    #roomId: number | undefined;

    factoryMode: FactoryMode = FactoryMode.Fetch;
    writeMode: WriteMode = WriteMode.WriteIfFree;

    #obj: DatabaseRoom | null = null;
    #subrooms: Set<number> | null = null;
    #hardwareSupport: Set<RoomDataTypes.HardwareSupport> | null = null;
    #tags: Set<string> | null = null;

    #cannotAccessBeforeInitError = new Error("Cannot access properties before initialization");
    #cannotWriteBeforeInitError = new Error("Cannot write before initialization");

    constructor(server: ServerBase, kv: KV) {

        this.#server = server;
        this.#kv = kv;

    }

    /**
     * Initialize the factory. Retrieves the room from the database and populates factory values.
     * 
     * Does not fetch subroom content, only available subroom IDs.
     * 
     * When using write mode, values are initialized to defaults.
     * 
     * Defaults:
     *   - All hardware is supported
     *   - Cloning is not allowed
     *   - Room is not AG or dorm
     *   - State is Moderation_Closed
     *   - Accessibility is Unlisted
     *   - CreatorPlayerId is 1 (Coach)
     *   - Name and Description are empty strings
     */
    async init(options: FactoryOptions) {
        if (typeof options.id == 'undefined' && typeof options.name == 'undefined')
            throw new Error("Must specify a room ID or a room name");

        if (typeof options.id !== 'undefined') this.#roomId = options.id;
        else {
            if (!options.name) throw new Error("Room name must be provided");

            const id = await this.#server.Rooms.getIdFromName(options.name);
            if (id == null) throw new Error("Room name not found");
            this.#roomId = id;
        }

        const obj = await this.#kv.getKv().get<DatabaseRoom>([RoomFactory.roomsKey, this.#roomId, 'meta']);
        if (options.mode == FactoryMode.Fetch && obj.value == null) return null;
        else this.#obj = options.mode == FactoryMode.Fetch ? obj.value : {
            Hardware: new Set(HardwareSupports),
            Tags: new Set(),
            CoOwners: new Set(),
            InvitedCoOwners: new Set(),
            Hosts: new Set(),
            InvitedHosts: new Set(),
            Room: {
                Name: "",
                Description: "",
                CreatorPlayerId: 1,
                ImageName: "",
                State: RoomState.Moderation_Closed,
                Accessibility: RoomAccessibility.Unlisted,
                SupportsLevelVoting: false,
                IsAGRoom: false,
                IsDormRoom: false,
                CloningAllowed: false,
                AllowsJuniors: true,
                RoomWarningMask: 0,
                CustomRoomWarning: "",
                DisableMicAutoMute: null
            }
        };

        const subrooms = await this.#kv.getKv().get<Set<number>>([RoomFactory.roomsKey, this.#roomId, "subrooms"]);
        if (options.mode == FactoryMode.Write || subrooms.value == null) this.#subrooms = new Set();
        else this.#subrooms = subrooms.value;

        const hardwareSupport = await this.#kv.getKv().get<Set<RoomDataTypes.HardwareSupport>>([RoomFactory.roomsKey, this.#roomId, 'hardware']);
        if (hardwareSupport.value == null) this.#hardwareSupport = new Set(HardwareSupports);
        else this.#hardwareSupport = hardwareSupport.value;

        const tags = await this.#kv.getKv().get<Set<string>>([RoomFactory.roomsKey, this.#roomId, 'tags']);
        this.#tags = tags.value;

        this.factoryMode = options.mode;
        if (options.mode == FactoryMode.Write) this.writeMode = options.writeMode;

        return this;
    }

    async write() {
        if (typeof this.#roomId !== 'number') throw this.#cannotWriteBeforeInitError;

        const w = async () => {
            if (typeof this.#roomId !== 'number') throw this.#cannotWriteBeforeInitError;

            await Promise.all([
                this.#kv.getKv().set([RoomFactory.roomsKey, this.#roomId, 'meta'], this.#obj),
                this.#kv.getKv().set([RoomFactory.roomsKey, this.#roomId, 'hardware'], this.#hardwareSupport),
                this.#kv.getKv().set([RoomFactory.roomsKey, this.#roomId, 'tags'], this.#tags),
                this.#kv.getKv().set([RoomFactory.roomsKey, this.#roomId, "subrooms"], this.#subrooms)
            ]);

            if (!this.IsDormRoom) this.#kv.getKv().set([ServerRoomsBase.roomNamesKey, this.Name], this.#roomId);
            else this.#kv.getKv().set([ServerRoomsBase.playerDormsKey, this.CreatorPlayerId], this.#roomId);

            this.#server.emit('room.updated', { room: this });
            if (roomDebug) log.d(`Room ${this.#roomId} written and emitted`);
        }

        if (this.factoryMode == FactoryMode.Fetch) throw new Error("Cannot write in fetch mode");

        const key = [RoomFactory.roomsKey, this.#roomId, 'meta'];
        const val = await this.#kv.getKv().get(key);
        if (val.value == null) await w();
        else {
            if (this.writeMode == WriteMode.Overwrite) await w();
            else throw new Error("Room already exists");
        }
    }

    async export(): Promise<RoomDataTypes.RoomDetails> {
        if (!this.#obj || !this.#roomId) throw this.#cannotAccessBeforeInitError;
        const obj = this.#obj;
        const hardwareSupport = this.getHardwareSupport();
        const autoTags = this.getTags();
        const galvTags = this.getGalvanicTags();

        const subroomExports = (await Promise.all(
            this.getSubrooms().values().map(subroom => this.getSubroom(subroom))
        )).map(factory => factory.export());

        return {
            Room: {
                RoomId: this.#roomId,
                Name: obj.Room.Name,
                Description: obj.Room.Description,
                CreatorPlayerId: obj.Room.CreatorPlayerId,
                ImageName: obj.Room.ImageName,
                State: obj.Room.State,
                Accessibility: obj.Room.Accessibility,
                SupportsLevelVoting: obj.Room.SupportsLevelVoting,
                IsAGRoom: obj.Room.IsAGRoom,
                IsDormRoom: obj.Room.IsDormRoom,
                CloningAllowed: obj.Room.CloningAllowed,
                AllowsJuniors: obj.Room.AllowsJuniors,
                RoomWarningMask: obj.Room.RoomWarningMask,
                CustomRoomWarning: obj.Room.CustomRoomWarning,
                DisableMicAutoMute: obj.Room.DisableMicAutoMute,
                SupportsScreens: hardwareSupport.has('screens'),
                SupportsWalkVR: hardwareSupport.has('walk_vr'),
                SupportsTeleportVR: hardwareSupport.has('teleport_vr'),
                SupportsMobile: hardwareSupport.has('mobile'),
                SupportsVRLow: hardwareSupport.has('low_vr')
            },
            Scenes: subroomExports,
            Tags: autoTags.concat(galvTags),
            CoOwners: [],
            InvitedCoOwners: [],
            Hosts: [],
            InvitedHosts: [],
            CheerCount: 0,
            FavoriteCount: 0,
            VisitCount: await this.getVisitCount()
        }
    }
    setRoomProperties(props: RoomDataTypes.DatabaseRoomContent) {
        Object.assign(this, props);
    }

    getRoomId() {
        if (!this.#roomId) throw this.#cannotAccessBeforeInitError;
        return this.#roomId;
    }

    getSubrooms() {
        if (!this.#subrooms) throw this.#cannotAccessBeforeInitError;
        return this.#subrooms;
    }
    async getSubroom(id: number) {
        if (!this.#subrooms) throw this.#cannotAccessBeforeInitError;
        if (!this.#subrooms.has(id)) throw new Error("Subroom not available to this room");
        return await new SubroomFactory(this.#server, this.#kv).init({ mode: FactoryMode.Fetch, writeMode: WriteMode.WriteIfFree, id });
    }
    getAvailableSubroomId() {
        let id = Math.round(Math.random() * Math.pow(2, 31));
        if (this.getSubrooms().has(id)) id = this.getAvailableSubroomId();
        return id;
    }
    async newSubroom(mode?: WriteMode) {
        return await new SubroomFactory(this.#server, this.#kv).init({ mode: FactoryMode.Write, writeMode: mode ? mode : WriteMode.WriteIfFree, id: this.getAvailableSubroomId() });
    }
    addSubroom(id: number) {
        if (!this.#subrooms) throw this.#cannotAccessBeforeInitError;
        this.#subrooms.add(id);
    }

    get Name() { if (!this.#obj) throw this.#cannotAccessBeforeInitError; else return this.#obj.Room.Name }
    set Name(data) { if (!this.#obj) throw this.#cannotAccessBeforeInitError; this.#obj.Room.Name = data }

    get Description() { if (!this.#obj) throw this.#cannotAccessBeforeInitError; else return this.#obj.Room.Description }
    set Description(data) { if (!this.#obj) throw this.#cannotAccessBeforeInitError; this.#obj.Room.Description = data }

    get CreatorPlayerId() { if (!this.#obj) throw this.#cannotAccessBeforeInitError; else return this.#obj.Room.CreatorPlayerId }
    set CreatorPlayerId(data) { if (!this.#obj) throw this.#cannotAccessBeforeInitError; this.#obj.Room.CreatorPlayerId = data }

    get ImageName() { if (!this.#obj) throw this.#cannotAccessBeforeInitError; else return this.#obj.Room.ImageName }
    set ImageName(data) { if (!this.#obj) throw this.#cannotAccessBeforeInitError; this.#obj.Room.ImageName = data }

    get State() { if (!this.#obj) throw this.#cannotAccessBeforeInitError; else return this.#obj.Room.State }
    set State(data) { if (!this.#obj) throw this.#cannotAccessBeforeInitError; this.#obj.Room.State = data }

    get Accessibility() { if (!this.#obj) throw this.#cannotAccessBeforeInitError; else return this.#obj.Room.Accessibility }
    set Accessibility(data) { if (!this.#obj) throw this.#cannotAccessBeforeInitError; this.#obj.Room.Accessibility = data }

    get SupportsLevelVoting() { if (!this.#obj) throw this.#cannotAccessBeforeInitError; else return this.#obj.Room.SupportsLevelVoting }
    set SupportsLevelVoting(data) { if (!this.#obj) throw this.#cannotAccessBeforeInitError; this.#obj.Room.SupportsLevelVoting = data }

    get IsAGRoom() { if (!this.#obj) throw this.#cannotAccessBeforeInitError; else return this.#obj.Room.IsAGRoom }
    set IsAGRoom(data) { if (!this.#obj) throw this.#cannotAccessBeforeInitError; this.#obj.Room.IsAGRoom = data }

    get IsDormRoom() { if (!this.#obj) throw this.#cannotAccessBeforeInitError; else return this.#obj.Room.IsDormRoom }
    set IsDormRoom(data) { if (!this.#obj) throw this.#cannotAccessBeforeInitError; this.#obj.Room.IsDormRoom = data }

    get CloningAllowed() { if (!this.#obj) throw this.#cannotAccessBeforeInitError; else return this.#obj.Room.CloningAllowed }
    set CloningAllowed(data) { if (!this.#obj) throw this.#cannotAccessBeforeInitError; this.#obj.Room.CloningAllowed = data }

    get AllowsJuniors() { if (!this.#obj) throw this.#cannotAccessBeforeInitError; else return this.#obj.Room.AllowsJuniors }
    set AllowsJuniors(data) { if (!this.#obj) throw this.#cannotAccessBeforeInitError; this.#obj.Room.AllowsJuniors = data }

    get RoomWarningMask() { if (!this.#obj) throw this.#cannotAccessBeforeInitError; else return this.#obj.Room.RoomWarningMask }
    set RoomWarningMask(data) { if (!this.#obj) throw this.#cannotAccessBeforeInitError; this.#obj.Room.RoomWarningMask = data }

    get CustomRoomWarning() { if (!this.#obj) throw this.#cannotAccessBeforeInitError; else return this.#obj.Room.CustomRoomWarning }
    set CustomRoomWarning(data) { if (!this.#obj) throw this.#cannotAccessBeforeInitError; this.#obj.Room.CustomRoomWarning = data }

    get DisableMicAutoMute() { if (!this.#obj) throw this.#cannotAccessBeforeInitError; else return this.#obj.Room.DisableMicAutoMute }
    set DisableMicAutoMute(data) { if (!this.#obj) throw this.#cannotAccessBeforeInitError; this.#obj.Room.DisableMicAutoMute = data }

    getHardwareSupport() {
        if (!this.#hardwareSupport) throw this.#cannotAccessBeforeInitError;
        return this.#hardwareSupport;
    }
    async #saveHardwareSupport() {
        if (!this.#roomId) throw this.#cannotAccessBeforeInitError;
        await this.#kv.getKv().set([this.#roomId, 'hardware'], this.#hardwareSupport);
    }
    async addHardwareSupport(...hardware: RoomDataTypes.HardwareSupport[]) {
        if (!this.#hardwareSupport || !this.#roomId) throw this.#cannotAccessBeforeInitError;

        if (typeof hardware == 'string') {
            this.#hardwareSupport.add(hardware);
            await this.#saveHardwareSupport();
        } else {
            for (const hw of hardware) this.#hardwareSupport.add(hw);
            await this.#saveHardwareSupport();
        }
    }
    async removeHardwareSupport(hardware: RoomDataTypes.HardwareSupport) {
        if (!this.#hardwareSupport) throw this.#cannotAccessBeforeInitError;
        this.#hardwareSupport.delete(hardware);
        await this.#saveHardwareSupport();
    }
    /**
     * Removes support for every hardware type in the room. When saving immediately after this, no client can legally join the room.
     * 
     * In production, ensure at least one hardware type is supported.
     */
    removeAllHardwareSupport() {
        this.#hardwareSupport = new Set();
    }
    /**
     * Adds support for every hardware type in the room.
     */
    addAllHardwareSupport() {
        this.#hardwareSupport = new Set(HardwareSupports);
    }

    /**
     * Visits are fetched during every access, not during init
     */
    async getVisitCount() {
        if (!this.#roomId) throw this.#cannotAccessBeforeInitError;
        const val = await this.#kv.getKv().get<number>([RoomFactory.roomsKey, this.#roomId, 'visits']);
        if (val.value == null) return 0;
        else return val.value;
    }
    /**
     * Visits are fetched during every access, not during init
     */
    async addVisit() {
        if (!this.#roomId) throw this.#cannotAccessBeforeInitError;
        const visits = await this.getVisitCount();
        await this.#kv.getKv().set([RoomFactory.roomsKey, this.#roomId, 'visits'], visits + 1);
    }

    getGalvanicTags(): GalvanicTagDTO[] {
        const tags: GalvanicTagDTO[] = [];

        if (this.IsAGRoom) tags.push({ Tag: "recroomoriginal", Type: TagType.AGOnly });
        if (this.IsDormRoom) tags.push({ Tag: "dormroom", Type: TagType.AGOnly });
        if (this.Name === "Paintball" || this.Name === "PaintballVR") tags.push({ Tag: "paintball", Type: TagType.AGOnly });
        const hardwareSupport = this.getHardwareSupport();
        if (hardwareSupport.has('screens')) tags.push({ Tag: "screen", Type: TagType.Auto });
        if (hardwareSupport.has('walk_vr')) tags.push({ Tag: "walkvr", Type: TagType.Auto });
        if (hardwareSupport.has('teleport_vr')) tags.push({ Tag: "teleportvr", Type: TagType.Auto });
        if (this.AllowsJuniors) tags.push({ Tag: "junior", Type: TagType.Auto });

        return tags;
    }
    getTags(): TagDTO[] {
        if (!this.#tags) return [];
        return this.#tags.values().toArray().map(val => ({ Tag: val, Type: TagType.General }));
    }
    setTags(tags: Set<string>) {
        this.#tags = tags;
    }

}