//! TODO: There is like no error checking in queries at all
import type { Response, Request } from "express";

import "dotenv/config";
import dayjs from "dayjs";
import relativeTime from "dayjs/plugin/relativeTime.js";

import express from "express";
import bodyParser from "body-parser";
import session from "express-session";
import connectPgSimple from "connect-pg-simple";
import flash from "connect-flash";

import { drizzle } from "drizzle-orm/node-postgres";
import { follows, profiles, updates, users } from "./db/schema.js";
import { and, desc, eq } from "drizzle-orm";

// routes
import loginRoutes from "./routes/login.js";
import userRoutes from "./routes/users.js";
import { getMoods, render } from "./routes/util.js";

const db = drizzle(process.env.DATABASE_URL!);

//! TODO: Make sure SQL queries arent being repeated too much
(async () => {
  const { moods, moodsSorted } = await getMoods();

  // setup dayjs
  dayjs.extend(relativeTime);

  // setup express app
  const app = express();
  app.set("view engine", "pug");
  app.use(express.static("static"));
  app.use(bodyParser.urlencoded({ extended: false }));
  app.use(
    session({
      store: new (connectPgSimple(session))(),
      secret: process.env.COOKIE_SECRET,
      resave: false,
      cookie: { maxAge: 7 * 24 * 60 * 60 * 1000 }
    })
  );
  app.use(flash());

  app.get("/", async (req, res) => {
    const upd = db
      .selectDistinctOn([updates.user], {
        date: updates.date,
        user: users.name
      })
      .from(updates)
      .innerJoin(users, eq(updates.user, users.id))
      .orderBy(updates.user, desc(updates.date))
      .limit(25)
      .as("upd");
    const recentUpdates = await db.select().from(upd).orderBy(desc(upd.date));

    render(db, "index", "Home", res, req, {
      users: (await db.select().from(users)).length,
      recentUpdates
    });
  });

  await userRoutes(app, db);

  //! -- TEMP DASHBOARD START --
  app.get("/dashboard", async (req, res) => {
    if (!req.session["loggedIn"]) {
      res.redirect("/login");
      return;
    }
    const user = (
      await db
        .select({
          name: users.name,
          bio: profiles.bio,
          website: profiles.website //! validate this
        })
        .from(users)
        .where(eq(users.name, req.session["user"]))
        .leftJoin(profiles, eq(users.id, profiles.user))
    )[0];

    const now = dayjs();
    const moodHistory = (
      await db
        .select({ mood: updates.mood, date: updates.date })
        .from(updates)
        .where(eq(updates.user, req.session["uid"]))
        .orderBy(desc(updates.date))
        .limit(10)
    ).map((e) => {
      return { mood: moods[e.mood], date: now.to(dayjs(e.date)) };
    });

    const recentUpdates = (
      await db
        .select({
          user: users.name,
          mood: updates.mood,
          desc: updates.description,
          date: updates.date
        })
        .from(updates)
        .innerJoin(
          follows,
          and(
            eq(follows.userId, updates.user),
            eq(follows.followerId, req.session["uid"])
          )
        )
        .leftJoin(users, eq(updates.user, users.id))
        .orderBy(desc(updates.date))
        .limit(25)
    ).map((e) => {
      return {
        user: e.user,
        mood: moods[e.mood],
        desc: e.desc,
        date: dayjs().to(dayjs(e.date))
      };
    });

    render(db, "dashboard", "Dashboard", res, req, {
      user,
      moods,
      moodsSorted,
      moodHistory,
      recentUpdates,
      feed: []
    });
  });
  app.post("/update", async (req, res) => {
    if (!req.session["loggedIn"]) {
      res.redirect("/login");
      return;
    }
    const moodIndex = moods.indexOf(req.body.mood.trim());
    if (moodIndex === -1) {
      req.flash(
        "error",
        "That mood doesn't exist in the database, WTF are you trying to do??"
      );
      res.redirect("/dashboard");
      return;
    }
    if (req.body.desc.length > 512) {
      req.flash(
        "error",
        "Mood description can't be longer than 512 characters"
      );
      res.redirect("/dashboard");
    }

    await db
      .insert(updates)
      // @ts-expect-error
      .values({
        user: req.session["uid"],
        mood: moodIndex,
        description: req.body.desc,
        date: new Date(Date.now())
      });
    req.flash("success", "Mood updated!");
    res.redirect("/dashboard");
  });
  //! -- TEMP DASHBOARD END   --

  //! TEMP Also not sanitized like at all
  //! Also make sure user isnt logged in before doing this
  loginRoutes(app, db);
  //! TEMP done

  app.listen(1337, () => {
    console.log("Listening on http://127.0.0.1:1337/");
  });
})();