import axios from 'axios'
import { db } from "@/lib/db"
import { NextResponse } from "next/server";
import { GET as authorize } from '../authorize/route'

export async function GET(req: Request) {
    try {
        // Verify state against user id in user table.
        const key = await db.apiKey.findFirst({
          where: {
            id: req.headers.get('x-api-key') as string
          }
        })

        console.log("API USER:", key)
        if (!key) {
            return new NextResponse("Forbidden", { status: 403 });
        }

        const connection = await db.twitchConnection.findFirst({
          where: {
            userId: key.userId
          }
        })
        if (!connection) {
            return new NextResponse("Forbidden", { status: 403 });
        }

        try {
            const { expires_in }: { client_id:string, login:string, scopes:string[], user_id:string, expires_in:number } = (await axios.get("https://id.twitch.tv/oauth2/validate", {
              headers: {
                Authorization: 'OAuth ' + connection.accessToken
              }
            })).data;
            if (expires_in > 3600)
                return new NextResponse("", { status: 201 });
        } catch (error) {
            console.log("Oudated Twitch token.")
        }

        // Post to https://id.twitch.tv/oauth2/token
        const token: { access_token:string, expires_in:number, refresh_token:string, token_type:string, scope:string[] } = (await axios.post("https://id.twitch.tv/oauth2/token", {
            client_id: process.env.TWITCH_BOT_CLIENT_ID,
            client_secret: process.env.TWITCH_BOT_CLIENT_SECRET,
            grant_type: "refresh_token",
            refresh_token: connection.refreshToken
        })).data

        // Fetch values from token.
        const { access_token, expires_in, refresh_token, token_type } = token
        console.log("AT", access_token)
        console.log("RT", refresh_token)
        console.log("TT", token_type)

        if (!access_token || !refresh_token || token_type !== "bearer") {
            return new NextResponse("Unauthorized", { status: 401 });
        }

        await db.twitchConnection.update({
          where: {
            userId: key.userId
          },
          data: {
            accessToken: access_token
          }
        })
        
        return new NextResponse("", { status: 200 });
    } catch (error) {
        console.log("[ACCOUNT]", error);
        return new NextResponse("Internal Error", { status: 500 });
    }
}