type Settings = {
    apiRoot: string,
}

export const settings: Settings = {
    apiRoot: "https://api.playerio.com/json/",
}

type KVPair = {
    key: string,
    value: string,
}

const map2KV = function(rec: Record<string, any>): Array<KVPair> {
    return Object.entries(rec).map(([key, value]) => {
        return {
            key: key,
            value: value,
        }
    })
}

const kv2Map = function(kv: Array<KVPair>): Record<string, any> {
    let obj: Record<string, any> = {}

    kv.forEach(p => {
        obj[p.key] = p.value
    })

    return obj
}

class Channel {
    token: string | undefined

    call<A>(method: number, args: Record<string, any>, converter: (response: Record<string, any>) => A): Promise<A> {
        const body = "[" + method + "|" + (this.token || "") + "]" + JSON.stringify(args)

        return fetch(settings.apiRoot, {
            method: "POST",
            body: body,
        }).then(resp => resp.text()).then(resp => {
            if(resp.startsWith("[")) {
                const end = resp.indexOf("]")
                this.token = resp.substring(1, end)
                resp = resp.substring(end + 1)
            }
            return JSON.parse(resp)
        }).then(result => {
            return converter(result)
        })
    }

    authenticate(
        gameId: string,
        connectionId: string,
        authenticationArguments: Array<KVPair>,
        playerInsightSegments: Array<string>,
        clientApi: string,
        clientInfo: Array<KVPair>,
        playCodes: Array<string>,
        converter: (response: Record<string, any>) => Client
    ): Promise<Client> {
        return this.call(13, {
            gameid: gameId,
            connectionid: connectionId,
            authenticationarguments: authenticationArguments,
            playerinsightsegments: playerInsightSegments,
            clientapi: clientApi,
            clientinfo: clientInfo,
            playcodes: playCodes
        }, converter)
    }

    listRooms(
        roomType: string,
        searchCriteria: Record<string, any>,
        resultLimit: number,
        resultOffset: number,
        onlyDevRooms: boolean,
        converter: (response: Record<string, any>) => Array<RoomInfo>
    ): Promise<Array<RoomInfo>> {
        return this.call(30, {
            roomtype: roomType,
            searchcriteria: searchCriteria,
            resultlimit: resultLimit,
            resultoffset: resultOffset,
            onlydevrooms: onlyDevRooms
        }, converter)
    }
}

export const authenticate = function (
    gameId: string,
    connectionId: string,
    authenticationArguments: Record<string, string>,
    playerInsightSegments: Array<string>,
): Promise<Client> {
    const channel = new Channel();
    return channel.authenticate(
        gameId,
        connectionId,
        map2KV(authenticationArguments),
        playerInsightSegments,
        "javascript",
        map2KV({}),
        [],
        (result: Record<string, any>) => {
            channel.token = result.token;
            return new Client(channel, gameId, result.gamefsredirectmap, result.userid);
        }
    )
}

export class Client {
    connectUserId: string
    gameId: string
    multiplayer: Multiplayer

    constructor(channel: Channel, gameId: string, gameFsRedirectMap: string, userId: string) {
        this.connectUserId = userId;
        this.gameId = gameId;

        this.multiplayer = new Multiplayer(channel)
    }
}

export class Multiplayer {
    developmentServer: string | null
    useSecureConnections: boolean

    listRooms: (roomType: string, searchCriteria: Record<string, any>, resultLimit: number, resultOffset: number) => Promise<Array<RoomInfo>>

    constructor(channel: Channel) {
        this.developmentServer = null
        this.useSecureConnections = true

        this.listRooms = (roomType: string, searchCriteria: Record<string, any>, resultLimit: number, resultOffset: number) =>
            channel.listRooms(
                roomType,
                map2KV(searchCriteria),
                resultLimit,
                resultOffset,
                this.developmentServer != null,
                (result: Record<string, any>) =>
                    result.rooms.map((room: any) =>
                        new RoomInfo(
                            room.id,
                            room.roomtype,
                            room.onlineusers,
                            kv2Map(room.roomdata)
                        )
                    )
            )
    }
}

class RoomInfo {
    id: string
    roomType: string
    onlineUsers: number
    roomData: Record<string, any>

    constructor(id: string, roomType: string, onlineUsers: number, roomData: Record<string, any>) {
        this.id = id
        this.roomType = roomType
        this.onlineUsers = onlineUsers
        this.roomData = roomData
    }
}