const express = require('express');
const router = express.Router();

import pool from '../db';
import { approveApplication, createApplication, denyApplication, getAllMemberApplications, getApplicationByID, getApplicationComments, getApplicationList, getMemberApplication } from '../services/applicationService';
import { MemberState, setUserState } from '../services/memberService';
import { getRankByName, insertMemberRank } from '../services/rankService';
import { ApplicationFull, CommentRow } from "@app/shared/types/application"
import { assignUserToStatus } from '../services/statusService';
import { Request, Response } from 'express';
import { getUserRoles } from '../services/rolesService';

// POST /application
router.post('/', async (req, res) => {
  try {
    const App = req.body?.App || {};
    const memberID = req.user.id;

    const appVersion = 1;

    await createApplication(memberID, appVersion, JSON.stringify(App))
    await setUserState(memberID, MemberState.Applicant);

    res.sendStatus(201);
  } catch (err) {
    console.error('Failed to create application: \n', err);
    res.status(500).json({ error: 'Failed to create application' });
  }
});

// GET /application/all
router.get('/all', async (req, res) => {
  try {
    const rows = await getApplicationList();
    res.status(200).json(rows);
  } catch (err) {
    console.error(err);
    res.status(500);
  }
});

router.get('/meList', async (req, res) => {

  let userID = req.user.id;

  try {
    let application = await getAllMemberApplications(userID);

    return res.status(200).json(application);
  } catch (error) {
    console.error('Failed to load applications: \n', error);
    return res.status(500).json(error);
  }
})

router.get('/me', async (req, res) => {

  let userID = req.user.id;

  try {
    let application = await getMemberApplication(userID);

    if (application === undefined)
      res.sendStatus(204);

    const comments: CommentRow[] = await getApplicationComments(application.id);

    const output: ApplicationFull = {
      application,
      comments,
    }

    return res.status(200).json(output);
  } catch (error) {
    console.error('Failed to load application:', error);
    return res.status(500).json(error);
  }
})

// GET /application/:id
router.get('/me/:id', async (req: Request, res: Response) => {
  let appID = Number(req.params.id);
  let member = req.user.id;
  try {
    const application = await getApplicationByID(appID);
    if (application === undefined)
      return res.sendStatus(204);
    console.log(application.member_id, member)
    if (application.member_id != member) {
      return res.sendStatus(403);
    }

    const comments: CommentRow[] = await getApplicationComments(appID);

    const output: ApplicationFull = {
      application,
      comments,
    }
    return res.status(200).json(output);
  }
  catch (err) {
    console.error('Query failed:', err);
    return res.status(500).json({ error: 'Failed to load application' });
  }
});

// GET /application/:id
router.get('/:id', async (req: Request, res: Response) => {
  let appID = Number(req.params.id);
  let asAdmin = !!req.query.admin || false;
  let user = req.user.id;

  //TODO: Replace this with bigger authorization system eventually
  if (asAdmin) {
    let allowed = (await getUserRoles(user)).some((role) =>
      role.name.toLowerCase() === 'dev' ||
      role.name.toLowerCase() === 'recruiter' ||
      role.name.toLowerCase() === 'administrator')
    console.log(allowed)
    if (!allowed) {
      return res.sendStatus(403)
    }
  }
  try {
    const application = await getApplicationByID(appID);
    if (application === undefined)
      return res.sendStatus(204);

    const comments: CommentRow[] = await getApplicationComments(appID, asAdmin);

    const output: ApplicationFull = {
      application,
      comments,
    }
    return res.status(200).json(output);
  }
  catch (err) {
    console.error('Query failed:', err);
    return res.status(500).json({ error: 'Failed to load application' });
  }
});

// POST /application/approve/:id
router.post('/approve/:id', async (req, res) => {
  const appID = req.params.id;

  try {
    const app = await getApplicationByID(appID);
    const result = await approveApplication(appID);

    //guard against failures
    if (result.affectedRows != 1) {
      throw new Error("Something went wrong approving the application");
    }

    console.log(app.member_id);
    //update user profile
    await setUserState(app.member_id, MemberState.Member);

    let nextRank = await getRankByName('Recruit')
    await insertMemberRank(app.member_id, nextRank.id);
    //assign user to "pending basic"
    await assignUserToStatus(app.member_id, 1);
    res.sendStatus(200);
  } catch (err) {
    console.error('Approve failed:', err);
    res.status(500).json({ error: 'Failed to approve application' });
  }
});

// POST /application/deny/:id
router.post('/deny/:id', async (req, res) => {
  const appID = req.params.id;

  try {
    const app = await getApplicationByID(appID);
    await denyApplication(appID);
    await setUserState(app.member_id, MemberState.Denied);
    res.sendStatus(200);
  } catch (err) {
    console.error('Approve failed:', err);
    res.status(500).json({ error: 'Failed to deny application' });
  }
});

// POST /application/:id/comment
router.post('/:id/comment', async (req: Request, res: Response) => {
  const appID = req.params.id;
  const data = req.body.message;
  const user = req.user;

  console.log(user)

  const sql = `INSERT INTO application_comments(
    application_id,
    poster_id,
    post_content
  )
VALUES(?, ?, ?);`

  try {
    const conn = await pool.getConnection();

    const result = await conn.query(sql, [appID, user.id, data])
    console.log(result)
    if (result.affectedRows !== 1) {
      conn.release();
      throw new Error("Insert Failure")
    }

    const getSQL = `SELECT app.id AS comment_id,
      app.post_content,
      app.poster_id,
      app.post_time,
      app.last_modified,
      member.name AS poster_name
        FROM application_comments AS app
          INNER JOIN members AS member ON member.id = app.poster_id
        WHERE app.id = ?; `;
    const comment = await conn.query(getSQL, [result.insertId])
    res.status(201).json(comment[0]);

  } catch (err) {
    console.error('Comment failed:', err);
    res.status(500).json({ error: 'Could not post comment' });
  }
});

// POST /application/:id/comment
router.post('/:id/adminComment', async (req: Request, res: Response) => {
  const appID = req.params.id;
  const data = req.body.message;
  const user = req.user;

  console.log(user)

  const sql = `INSERT INTO application_comments(
    application_id,
    poster_id,
    post_content,
    admin_only
  )
VALUES(?, ?, ?, 1);`

  try {
    const conn = await pool.getConnection();

    const result = await conn.query(sql, [appID, user.id, data])
    console.log(result)
    if (result.affectedRows !== 1) {
      conn.release();
      throw new Error("Insert Failure")
    }

    const getSQL = `SELECT app.id AS comment_id,
      app.post_content,
      app.poster_id,
      app.post_time,
      app.last_modified,
      app.admin_only,
      member.name AS poster_name
        FROM application_comments AS app
          INNER JOIN members AS member ON member.id = app.poster_id
        WHERE app.id = ?; `;
    const comment = await conn.query(getSQL, [result.insertId])
    res.status(201).json(comment[0]);

  } catch (err) {
    console.error('Comment failed:', err);
    res.status(500).json({ error: 'Could not post comment' });
  }
});

router.post('/restart', async (req: Request, res: Response) => {
  const user = req.user.id;
  try {
    await setUserState(user, MemberState.Guest);
    res.sendStatus(200);
  } catch (error) {
    console.error('Comment failed:', error);
    res.status(500).json({ error: 'Could not rester application' });
  }
})

module.exports = router;