import { ServerRequest } from '../external/http.ts'
import { HTTPProtocol, HTTPRequest, RemoteHost } from './type/HTTPRequest.ts'
import { Response } from './Response.ts'
import { HTTPResponse } from './type/HTTPResponse.ts'
import Utility from '../service/utility/Utility.ts'
import { Injectable } from '../../../di/src/decorator/Injection.ts'

@Injectable()
export class Request implements HTTPRequest {
    public readonly response: HTTPResponse
    private readonly _deno_req: ServerRequest
    private _body: any
    private _query: { [key: string]: any } = {}

    public readonly url: string
    public readonly method: string
    public readonly protocol: HTTPProtocol
    public readonly connection: Deno.Conn
    public readonly secure: boolean = false

    public get headers() {
        return this._deno_req.headers
    }

    get to_native(): ServerRequest {
        return this._deno_req
    }

    get cookies() {
        return this.response.cookies
    }

    constructor(
        protected utility: Utility,
        from: ServerRequest
    ) {
        this._deno_req = from
        this.url = this._deno_req.url
        this.method = this._deno_req.method.toLowerCase()
        this.protocol = {
            string: this._deno_req.proto,
            major: this._deno_req.protoMajor,
            minor: this._deno_req.protoMinor,
        }
        this.connection = this._deno_req.conn
        this.response = new Response(this)
    }

    public async prepare() {
        this._body = await Deno.readAll(this._deno_req.body)

        const url_params = new URLSearchParams(this.url.substr(1))
        const param_obj = Object.fromEntries(url_params)
        const params: any = {}
        for ( const key in param_obj ) {
            if ( !param_obj.hasOwnProperty(key) ) continue
            if ( param_obj[key] === '' ) params[key] = true
            else params[key] = this.utility.infer(param_obj[key])
        }

        this._query = params
    }

    respond(res: any) {
        return this._deno_req.respond(res)
    }

    // public body: RequestBody = {}
    // public original_body: RequestBody = {}

    get remote() {
        return this.connection.remoteAddr as RemoteHost
    }

    get body() {
        return this._body
    }

    get query() {
        return this._query
    }

    get hostname() {
        return this.headers.get('host')?.split(':')[0]
    }

    get path() {
        return this.url.split('?')[0]
    }

    get xhr() {
        return this.headers.get('x-requested-with')?.toLowerCase() === 'xmlhttprequest'
    }

    /*
    body
    fresh/stale - cache
    remote ips (proxy)
    params
    route?
    signedCookies
     */

    /*
    accepts content type
    accepts charsets
    accepts encodings
    accepts languages
    get header
    is content type
    get param with default value
    get input with default value
    range header parser
     */
}