#import "@preview/codelst:1.0.0": sourcefile, sourcecode

/* Highlights the source code file. */
#let highlight-code-file(filename) = sourcefile(read(filename), file: filename, lang: "java-new", 
  numbers-style: (lno) => align(right, move(dy: 1pt, text(fill: luma(120), size: 9pt, lno))))

/* Highlight output code block. */
#let highlight-output(body) = sourcecode(numbering: none, body)

/* The state variable to indicate whether the end of an assignment is reached. */
#let eoa = state("is-at-end-of-assignment", false)

/* Updates the state variable to indicate the end of an assignment. */
#let signature() = {
  eoa.update(true)
}

/* Draws the signature construct at the bottom right corner in the footer of the last page of an assignment. */
#let signature-footer(loc) = {
  if eoa.at(loc) {
    align(bottom + right,
      move(dy: -4em, dx: -1em,
        block(width: 15em)[
          #v(3em)
          #line(length: 100%) \
          #v(-2.5em)
          #align(center)[Teacher’s signature]
        ]))
    eoa.update(false)
  }
}

/* Draws page border around the provided content, taking an optional function to be called at the footer. */
#let apply-page-borders(body, ..font-options, footer-special-func: none) = {
  let page-margin = (left: 0.75in, right: 0.25in, top: 0.25in, bottom: 0.25in)
  let margin = (left: 0.65in, right: 0.15in, top: 1.5em, bottom: 1.5em)
  let page-border-thickness = 1.25pt
  set page(
    margin: (..page-margin, bottom: margin.bottom + 2em),
    numbering: "1",
    background: align(top + start, pad(..margin, rect(width: 100%, height: 100%, stroke: page-border-thickness + gray, radius: 5pt))),
    footer: locate(loc => {
      align(center, move(dy: -margin.bottom + 1em, text(..font-options, size: 9pt, counter(page).display(loc.page-numbering()))))
      if footer-special-func != none {
        footer-special-func(loc)
      }
    })
  )
  show: block.with(breakable: true, width: 100%, inset: page-border-thickness + 1em) 
  body
}

#let apply(body) = {
  let body-font-settings = (font: "Nunito Sans 10pt", size: 12pt, stretch: 75%)
//  let body-font-settings = (font: "Hanken Grotesk", size: 12pt, stretch: 75%)
  set text(..body-font-settings)

  let code-color = rgb("#f4f4f4")
  show raw: set text(font: "Iosevka Fixed", size: 1.1em)
  set raw(syntaxes: "vendor/Java.sublime-syntax")
  set raw(theme: "vendor/gr.tmTheme")
  show raw.where(block: false): box.with(
    fill: code-color,
    inset: (x: 3pt, y: 0pt),
    outset: (y: 3pt),
    radius: 2pt,
  )
  show raw.where(block: true): block.with(
    fill: code-color,
    inset: 10pt,
    radius: 4pt,
    width: 100%,
  )
  show raw.where(block: true): it => align(left, it)
  set list(marker: ([$square.filled.tiny$], [--]))
  set par(leading: 0.5em)
  apply-page-borders(body, ..body-font-settings, footer-special-func: signature-footer)
}

#let scos(name) = {
  v(1em)
  [=== Source Code]
  highlight-code-file("/code/" + name + ".java")
  [=== Output]
  let ofname = "/output/" + name + ".typ" 
  include ofname
}

#let assignment(number, description) = align(center, [
= #text(weight: 600, [Assignment #number])
== #text(weight: 500, [Program statement:]) #text(weight: 400, description)
])

#let skind(kind) = [
  ==== #text(weight: 500, kind)
]

#let objective(body) = align(center, [*Objective*: #body])
#let oset(kind) = block(spacing: 0.6em, [===== #h(1em) #kind])