import { EndpointType } from "$lib/enums/endpoints"
import type { NginxProtocol } from "$lib/enums/protocols"
import { doesFileExists } from "$lib/utils/filesystem-utils"
import { isPortAvailable, validatePort } from "$lib/utils/ports-utils"
import type { init } from "../../hooks.server"
import type { IEndpoint } from "./endpoints"

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

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

    // Creation should throw if something goes wrong
    //  with reasons why
    createSSLTerminationSimple(
        name: string,
        servicePort: number,
        serviceEndpoint: string,
        certificateURI: string,
        privateKeyURI: string
    ): Promise<SSLTermination>

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

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


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


    deleteSSLTerminationByName(
        name: 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 = EndpointType.SSL_TERMINATION

    public path: string
    public hash: string
    public name: string
    public sslPort: number
    public clearPort: number
    public servicePort: number
    public serviceEndpoint: string
    public protocol: NginxProtocol
    public certificateURI: string
    public privateKeyURI: string

    public get type() {
        return SSLTermination._type
    }

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

        validatePort(sslPort)
        validatePort(clearPort)
        validatePort(servicePort)

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

    }
    

}

type SSLTerminationChanges = {
        name?: 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
    }


    // Creation should throw if something goes wrong
    //  with reasons why
    public static async createSSLTerminationSimple(
        name: string,
        servicePort: number,
        serviceEndpoint: string,
        certificateURI: string,
        privateKeyURI: string
    ): Promise<SSLTermination> {

        SSLTerminationEndpointApp.assureInitialized()

        return await this.broker.createSSLTerminationSimple(
            name,
            servicePort,
            serviceEndpoint,
            certificateURI,
            privateKeyURI
        )

    }

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

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

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

        SSLTerminationEndpointApp.assureInitialized()

        return await this.broker.getSSLTerminationByName(
            name
        )

    }


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

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


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

        return await this.broker.deleteSSLTerminationByName(
            name
        )
    }


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

        return await this.broker.getAllSSLTerminations()
    }


    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")
        }
    }

}