import db from './database.js';
import Config from './util/config.js';
import {update_the_one_discord_role} from './discord_updates.js';


const the_ones = [];
const floors = {
  'Cardboard': 0,
  'Wood': 1250,
  'Wood+': 1350,
  'Bronze': 1400,
  'Bronze+': 1450,
  'Silver': 1475,
  'Silver+': 1500,
  'Gold': 1550,
  'Gold+': 1600,
  'Platinum': 1700,
  'Platinum+': 1800,
  'Diamond': 1900,
  'Diamond+': 2100,
  'Legendary': 2300,
  'The One': 9999999999999,
};

async function update_the_one(user_id, elo, mode) {
  // Check that "The One" is not deranking after a loss
  if (user_id == the_ones[mode].user_id) {
    const the_one = db.prepare('SELECT user_id, elo FROM rating WHERE s3_scores >= ? AND mode = ? ORDER BY elo DESC LIMIT 1').get(Config.games_needed_for_rank, mode);
    if (!the_one) return;

    the_ones[mode] = {
      user_id: the_one.user_id,
      elo: the_one.elo,
    };

    if (the_one.user_id != user_id) {
      await update_the_one_discord_role(user_id, false);
      await update_the_one_discord_role(the_one.user_id, true);
    }

    return;
  }

  if (elo > the_ones[mode].elo) {
    const the_previous_one = the_ones[mode].user_id;
    the_ones[mode] = {
      user_id: user_id,
      elo: elo,
    };

    await update_the_one_discord_role(the_previous_one, false);
    await update_the_one_discord_role(user_id, true);
  }
}

function init_the_ones() {
  for (let i = 0; i < 4; i++) {
    const the_one = db.prepare('SELECT user_id, elo FROM rating WHERE s3_scores >= ? AND mode = ? ORDER BY elo DESC LIMIT 1').get(Config.games_needed_for_rank, i);
    if (the_one) {
      the_ones[i] = {
        user_id: the_one.user_id,
        elo: the_one.elo,
      };
    } else {
      // New season, no scores yet!
      the_ones[i] = {
        user_id: null,
        elo: 100,
      };
    }
  }
}


function get_division_from_elo(elo, mode) {
  const progress = get_rankup_progress(elo, mode);
  return progress.floor_name;
}

function get_rankup_progress(elo, mode) {
  if (the_ones[mode].elo <= elo) {
    return {
      floor_name: 'The One',
      floor_elo: elo,
      curr_elo: elo,
      ceil_name: 'The One',
      ceil_elo: elo,
    };
  }

  let floor_division = 'Cardboard';
  for (const division in floors) {
    if (!floors.hasOwnProperty(division)) continue;

    if (floors[division] > elo) {
      return {
        floor_name: floor_division,
        floor_elo: floors[floor_division],
        curr_elo: elo,
        ceil_name: division,
        ceil_elo: division == 'The One' ? the_ones[mode].elo : floors[division],
      };
    }

    floor_division = division;
  }

  // unreachable
  return {
    floor_name: 'Cardboard',
    floor_elo: 0,
    curr_elo: elo,
    ceil_name: 'Wood',
    ceil_elo: floors[1],
  };
}

export {get_division_from_elo, get_rankup_progress, init_the_ones, update_the_one};