// ==========================================
// PRESENTATION: ОБЩАЯ ОСНОВА ВЁРСТКИ
// ==========================================

#let design-tokens(company, overrides: (:)) = {
  let defaults = (
    brand-color: company.brand.at("color", default: rgb("e39f49")),
    text-font: "Times New Roman",
    sans-font: "Arial",
    text-size: 12pt,
    small-size: 8pt,
    line-height: 1.5em,
    compact-line-height: 0.65em,
    paper: "a4",
    page-margin: (left: 3cm, right: 1.5cm, top: 2cm, bottom: 2cm),
  )
  let result = defaults
  for (key, value) in overrides {
    if key not in defaults {
      panic("Scientia / design-tokens: неизвестный token " + repr(key))
    }
    result.insert(key, value)
  }
  result
}

#let watermark-layer(value, font: "Arial") = {
  if value == none {
    none
  } else {
    [
      #place(center + horizon, dx: -4.8cm, dy: -8.5cm)[
        #rotate(35deg)[#text(font: font, size: 40pt, weight: "bold", fill: rgb("e8c9c9").transparentize(65%))[#value]]
      ]
      #place(center + horizon)[
        #rotate(35deg)[#text(font: font, size: 40pt, weight: "bold", fill: rgb("e8c9c9").transparentize(65%))[#value]]
      ]
      #place(center + horizon, dx: 4.8cm, dy: 8.5cm)[
        #rotate(35deg)[#text(font: font, size: 40pt, weight: "bold", fill: rgb("e8c9c9").transparentize(65%))[#value]]
      ]
    ]
  }
}

#let render-media-slot(
  resource,
  policy: "placeholder",
  width: 4cm,
  height: 2cm,
  label: "РЕСУРС НЕ ЗАДАН",
  fit: "contain",
) = {
  if policy not in ("hide", "placeholder", "reserve-space") {
    panic("Scientia / media-slot: неизвестная политика " + repr(policy))
  }

  if resource == none {
    if policy == "hide" {
      none
    } else if policy == "reserve-space" {
      box(width: width, height: height)
    } else {
      box(
        width: width,
        height: height,
        stroke: 0.6pt + luma(150),
        fill: luma(245),
        inset: 4pt,
        align(center + horizon)[
          #text(font: "Arial", size: 7pt, fill: luma(110), weight: "bold")[#label]
        ],
      )
    }
  } else if type(resource) == path {
    image(resource, width: width, height: height, fit: fit)
  } else if type(resource) == content {
    box(width: width, height: height, align(center + horizon, resource))
  } else {
    panic("Scientia / media-slot: ожидались none, path или content")
  }
}

#let apply-foundation(
  body,
  ctx: none,
  tokens: (:),
  page-options: (:),
  text-options: (:),
  par-options: (:),
) = {
  if ctx == none {
    panic("Scientia / foundation: document context обязателен")
  }
  let tokens = design-tokens(ctx.company, overrides: tokens)
  let page-defaults = (
    paper: tokens.paper,
    margin: tokens.at("page-margin"),
    foreground: watermark-layer(ctx.options.watermark, font: tokens.at("sans-font")),
  )
  let resolved-page = page-defaults
  for (key, value) in page-options { resolved-page.insert(key, value) }

  set page(..resolved-page)
  set text(
    font: tokens.at("text-font"),
    size: tokens.at("text-size"),
    lang: "ru",
    ..text-options,
  )
  set par(
    justify: true,
    first-line-indent: (amount: 1.25cm, all: true),
    leading: tokens.at("line-height"),
    ..par-options,
  )
  show table.cell: set par(first-line-indent: 0pt)
  show figure.caption.where(kind: table): set par(first-line-indent: 0pt)
  body
}