import {Request} from "../lifecycle/Request";
import {infer} from "@extollo/util";

/**
 * Base type representing a parsed cookie.
 */
export interface HTTPCookie {
    key: string,
    originalValue: string,
    value: any,
    exists: boolean,
}

export type MaybeHTTPCookie = HTTPCookie | undefined;

export class HTTPCookieJar {
    protected parsed: {[key: string]: HTTPCookie} = {}

    constructor(
        protected request: Request,
    ) {
        this.parseCookies()
    }

    get(name: string): MaybeHTTPCookie {
        if ( name in this.parsed ) {
            return this.parsed[name]
        }
    }

    private parseCookies() {
        const cookies = String(this.request.getHeader('cookie'))
        cookies.split(';').forEach(cookie => {
            const parts = cookie.split('=')

            const key = parts.shift()?.trim()
            if ( !key ) return;

            const value = decodeURI(parts.join('='))

            this.parsed[key] = {
                key,
                originalValue: value,
                value: infer(value),
                exists: true,
            }
        })
    }
}