import { aq, op } from "@uwdata/arquero"
d3 = require('d3')

books = await d3.json(
  // This is my live API so it runs in your browser.
  // Use your local API URL on your computer.
  "https://api.andrewheiss.com/books_simple?year=" + year_to_show
)

// Calculate the percent of the goal
goal_books = 50
total_books = books.count[0] == 0 ? 0 : books.count[0]
pct_goal = total_books / goal_books
pct_goal_truncated = pct_goal >= 1 ? 1 : pct_goal

// Calculate the average rating from the full data
books_full = aq.from(books.full_data)  // Make an Arquero data frame

avg_rating = books_full
  .rollup({
    rating: d => op.mean(d.rating)
  })
text_avg_rating = avg_rating.get('rating', 0).toFixed(2)

// Calculate the percent of the year
// This is soooo janky and sad and cobbled together with zombie code from 
// GitHub Copilot, but it works, so whatever
year_info = {
  const empty_date = new Date();
  const start_of_year = new Date(empty_date.getFullYear(), 0, 1);
  const end_of_year = new Date(empty_date.getFullYear() + 1, 0, 1);
  const year_progress = ((empty_date - start_of_year) / (end_of_year - start_of_year));

  const isLeapYear = (empty_date.getFullYear() % 4 == 0) && (empty_date.getFullYear() % 100 != 0) || (empty_date.getFullYear() % 400 == 0);
  const daysInYear = isLeapYear ? 366 : 365;

  const diff = empty_date - start_of_year;
  const oneDay = 1000 * 60 * 60 * 24;
  const day = Math.floor(diff / oneDay) + 1;
  
  const text = "Day " + day + " of " + daysInYear;

  return {
    pct_year: year_progress, 
    days_in_year: daysInYear, 
    yday: day,
    text: text
  }
}

// Make a little Arquero dataframe of progress details for plotting
progress_data = aq.from([
  {type: "Year complete", name: "Completed", value: year_info.pct_year, 
   label_right: `${(year_info.pct_year * 100).toFixed(2)}%`, 
   label_left: year_info.text},
  {type: "Year complete", name: "Remaining", value: 1 - year_info.pct_year},
  
  {type: "Books", name: "Completed", value: pct_goal_truncated, 
   label_right: `${(pct_goal * 100).toFixed(2)}%`, 
   label_left: op.round(total_books) + " of " + goal_books + " books"},
  {type: "Books", name: "Remaining", value: 1 - pct_goal_truncated}
])