#import "@preview/hydra:0.6.1": hydra

#let project(title: "", subtitle: "", authors: ((name: "", id: ""),), profs: ("",), submitted_at: none, logo: none, body) = {
  // Basic properties
  set document(author: "a", title: title)
  set text(lang: "de")
  set heading(numbering: "1.1")

  // Title page
  set align(center)
  v(1fr)
  
  // Logo
  if logo != none {
    image(logo, width: 50%)
  }
  v(3em)

  // Title
  text(2em, weight: 700, title)
  v(1em)

  // Subtitle
  text(2em, weight: 400, subtitle)
  v(1fr)

  set align(left)

  // Author
  let authors_title
  if authors.len() == 1 {
    authors_title = "Autor*in"
  } else {
    authors_title = "Autor*innen"
  }
  text(weight: 700, authors_title + " (Matrikelnummer):")
  grid(
    gutter: 1em,
    ..authors.map(author => author.name + " (" + author.id + ")").flatten()
  )

  // Profs
  let profs_title
  if profs.len() == 1 {
    profs_title = "Prüfer*in"
  } else {
    profs_title = "Prüfer*innen"
  }
  text(weight: 700, profs_title + ":")
  grid(
    gutter: 1em,
    ..profs,
  )

  // Abgabedatum
  if submitted_at != none {
    text(weight: 700, "Abgabedatum: ")
    text(submitted_at.display("[day].[month].[year]"))
  }

  // Table of contents
  set align(left)
  set page(numbering: "I", number-align: center)
  outline(depth: 3)
  pagebreak()

  // Header
  let show-header(ctx, c) = {
    emph(c.body)
    v(-0.8em)
    line(length: 100%, stroke: 0.5pt)
  }

  // Main body
  set page(numbering: "1", header: context {
    hydra(1, skip-starting: false, display: show-header)
  })
  counter(page).update(1)
  set par(justify: true)
  body

  pagebreak()
  bibliography("bibliography.yml")
}