import { status } from "./ui.ts"

// TODO embed this information into bangs.js
const ENGINE_NAMES: {[key:string]:string} = {
    "ddg": "DuckDuckGo",
    "qw": "Qwant",
    "qwl": "Qwant Lite",
    "g": "Google",
}

interface Bangs { [key: string]: { url: string, name: string } }
export let bangs: Promise<Bangs>;
export function load_bangs() {
    status("info", "Loading bangs...")
    bangs = new Promise(r => {
        (async () => {
            const bangs_res = await fetch("/bangs.json")
            if (!bangs_res.ok) return status("error", "could not download bangs.json")
            const k: {[key:string]:string} = await bangs_res.json()
            status("info", "Bangs loaded.")
            r(Object.fromEntries(Object.entries(k).map(([key,url]) => [key, { url, name: ENGINE_NAMES[key] ?? key }])))
        })()
    })
}

export async function process_query(default_engine: string, query: string) {
    const bang_prefix = "!"
    let url = ""
    if (query.startsWith(bang_prefix)) {
        const [engine, ...query_parts] = query.substring(bang_prefix.length).split(" ")
        url = await search_url(engine, query_parts.join(" "))
    } else {
        url = await search_url(default_engine, query)
    }

    status("success", `Forwarding to ${url}`)
    setTimeout(() => document.location.href = url, 0)
}

async function search_url(engine: string, query: string) {
    return (await bangs)[engine].url.replace("{{{s}}}", encodeURIComponent(query).replaceAll("%20", "+"))
}