import { EndpointType } from "$lib/server/enums/endpoints"
import type { NginxProtocol } from "$lib/server/enums/protocols"
import { validatePort } from "$lib/server/utils/ports-utils"
import type { IEndpoint } from "./endpoints-interfaces"

// TODO: inherit from a super class
export interface ISSLTerminationBroker {

    /**
     * Initialize the Broker and everything related to it
     */
    init(): Promise<void>

    // TODO: in the next version support 
    // TODO: creation of endpoints
    // TODO: according to path

    // NOTES: it's useless to generate ports backend
    // NOTES: generate them frontend and validate backend

    createSSLTermination(
        name: string,
        sslPort: number, 
        clearPort: number, 
        servicePort: number,
        serviceEndpoint: string,
        protocol: NginxProtocol,
        certificateURI: string,
        privateKeyURI: string
    ): Promise<SSLTermination>

    activateEndpointByPath(
        path: string
    ): Promise<boolean>

    deactivateEndpointByPath(
        path: string
    ): Promise<boolean>

    
    // Getting endpoints may be null, react over them
    getSSLTerminationByPath(
        path: string
    ): Promise<SSLTermination|null>


    // Throw if something goes wrong
    modifySSLTerminationByPath(
        path: string,
        changes: SSLTerminationChanges
    ): Promise<SSLTermination>


    deleteSSLTerminationByPath(
        path: string
    ): Promise<SSLTermination|null>


    getAllSSLTerminations(): Promise<SSLTermination[]>

}

/**
 * This class represents an SSL Termination Endpoint.
 * 
 * While it's possible to create it directly, it is
 * discouraged in favor of the Factory methods as it does
 * more checks than this class
 */
export class SSLTermination implements IEndpoint {   

    private static __type = EndpointType.SSL_TERMINATION

    public get type() {
        return SSLTermination.__type
    }
    
    public name: string
    public path: string
    public sslPort: number
    public clearPort: number
    public servicePort: number
    public serviceEndpoint: string
    public protocol: NginxProtocol
    public certificateURI: string
    public privateKeyURI: string

    

    constructor(
        name: string,
         path: string,
        sslPort: number,
        clearPort: number,
        servicePort: number,
        serviceEndpoint: string,
        protocol: NginxProtocol,
        certificateURI: string,
        privateKeyURI: string
    ) {

        this.name = name
        this.path = path
        this.sslPort = sslPort
        this.clearPort = clearPort
        this.servicePort = servicePort
        this.serviceEndpoint = serviceEndpoint
        this.protocol = protocol
        this.certificateURI = certificateURI
        this.privateKeyURI = privateKeyURI

    }
    

}

export type SSLTerminationChanges = {
        name?: string,
        path?: string,
        sslPort?: number,
        clearPort?: number,
        servicePort?: number,
        serviceEndpoint?: string,
        protocol?: NginxProtocol,
        certificateURI?: string,
        privateKeyURI?: string
}



export class SSLTerminationEndpointApp {

    private static initialized: boolean = false
    private static broker: ISSLTerminationBroker

    public static get ready() {
        return SSLTerminationEndpointApp.initialized
    }

    public static init(broker: ISSLTerminationBroker) {
        SSLTerminationEndpointApp.assureNotInitialized()

        SSLTerminationEndpointApp.broker = broker
        broker.init()
        SSLTerminationEndpointApp.initialized = true
    }

    public static async createSSLTermination(
        name: string,
        sslPort: number, 
        clearPort: number, 
        servicePort: number,
        serviceEndpoint: string,
        protocol: NginxProtocol,
        certificateURI: string,
        privateKeyURI: string
    ): Promise<SSLTermination> {

        SSLTerminationEndpointApp.assureInitialized()
        
        return await this.broker.createSSLTermination(
            name,
            sslPort,
            clearPort,
            servicePort,
            serviceEndpoint,
            protocol,
            certificateURI,
            privateKeyURI
        )
    }

    
    // Getting endpoints may be null, react over them
    public static async getSSLTerminationByPath(
        name: string
    ): Promise<SSLTermination|null> {

        SSLTerminationEndpointApp.assureInitialized()

        return await this.broker.getSSLTerminationByPath(
            name
        )

    }


    // Throw if something goes wrong
    public static async modifySSLTerminationByPath(
        name: string,
        changes: SSLTerminationChanges
    ): Promise<SSLTermination> {
        SSLTerminationEndpointApp.assureInitialized()

        return await this.broker.modifySSLTerminationByPath(
            name,
            changes
        )
    }


    public static async deleteSSLTerminationByPath(
        name: string
    ): Promise<SSLTermination|null> {
        SSLTerminationEndpointApp.assureInitialized()

        return await this.broker.deleteSSLTerminationByPath(
            name
        )
    }


    public static async getAllSSLTerminations(): Promise<SSLTermination[]> {
        SSLTerminationEndpointApp.assureInitialized()

        return await SSLTerminationEndpointApp.broker.getAllSSLTerminations()
    }

    public static async activateEndpointByPath(path: string) {
        SSLTerminationEndpointApp.assureInitialized()

        return await SSLTerminationEndpointApp.broker.activateEndpointByPath(
            path
        )
    }

    public static async deactivateEndpointByPath(path: string) {
        SSLTerminationEndpointApp.assureInitialized()

        return await SSLTerminationEndpointApp.broker.deactivateEndpointByPath(
            path
        )
    }


    private static assureNotInitialized() {
        if (SSLTerminationEndpointApp.initialized) {
            // UGLY: more specific
            throw new Error("SSLTerminationEndpointApp has been already initialized")
        }
    }

    private static assureInitialized() {
        if (SSLTerminationEndpointApp.initialized) {
            // UGLY: more specific
            throw new Error("SSLTerminationEndpointApp has not been initialized yet")
        }
    }

}