// Typst template for member export (PDF)
// Expected sys.inputs.elixir_data:
// {
//   "columns": [{"key": "...", "kind": "...", "label": "..."}, ...],
//   "rows": [["cell1", "cell2", ...], ...],
//   "meta": {"generated_at": "...", "member_count": 123}
// }

#set page(
  paper: "a4",
  flipped: true,
  margin: (top: 1.2cm, bottom: 1.2cm, left: 1.0cm, right: 1.0cm),
  numbering: "1",
  footer: context [
    #set text(size: 8pt)
    #set align(center)
    #counter(page).display("1 / 1", both: true)
  ]
)

#set text(size: 9pt, hyphenate: true)
#set heading(numbering: none)

// Enable text wrapping in table cells
#show table.cell: it => box(width: 100%)[#it]

#let data = sys.inputs.elixir_data
#let columns = data.at("columns", default: ())
#let rows = data.at("rows", default: ())
#let meta = data.at("meta", default: (generated_at: "", member_count: rows.len()))
#let title = data.at("title", default: "Member Export")
#let created_at_label = data.at("created_at_label", default: "Created at:")
#let member_count_label = data.at("member_count_label", default: "Member count:")

// Title
#align(center)[
  #text(size: 14pt, weight: "bold")[#title]
]

#v(0.4cm)

// Export metadata
#set text(size: 8pt, fill: black)
#grid(
  columns: (1fr, 1fr),
  gutter: 1cm,
  [*#created_at_label* #meta.at("generated_at", default: "")],
  [*#member_count_label* #meta.at("member_count", default: rows.len())],
)

#v(0.6cm)

// ---- Horizontal paging config ----
#let fixed_count = calc.min(2, columns.len())
#let max_dynamic_cols = 5
#let fixed_col_widths = (32mm, 32mm)

#let fixed_cols = columns.slice(0, fixed_count)
#let dynamic_cols = columns.slice(fixed_count, columns.len())
#let dynamic_chunks = dynamic_cols.chunks(max_dynamic_cols)

#let render_chunk(chunk_index, dyn_cols_chunk) = [
  #let dyn_count = dyn_cols_chunk.len()
  #let start = fixed_count + chunk_index * max_dynamic_cols

  #let page_cols = fixed_cols + dyn_cols_chunk

  // widths: first two columns fixed (32mm, 42mm), rest distributed as 1fr
  #let widths = (
    if fixed_count >= 1 { fixed_col_widths.at(0) } else { 1fr },
    if fixed_count >= 2 { fixed_col_widths.at(1) } else { 1fr },
    ..((1fr,) * dyn_count)
  )

  #let header_cells = page_cols.map(c => text(weight: "bold", size: 9pt)[#c.at("label", default: "")])

  // Body cells (row-major), only columns of this chunk
  #let body_cells = (
    rows
      .map(row => row.slice(0, fixed_count) + row.slice(start, start + dyn_count))
      .map(cells => cells.map(cell => text(size: 8.5pt)[#cell]))
      .flatten()
  )

  // Thinner grid for body; thicker vertical line between column 2 and 3; header and outer borders thick
  #let thin_stroke = 0.3pt + black
  #let thick_sep = 1.5pt + black
  #let thick_stroke = 1pt + black
  #let last_x = fixed_count + dyn_count - 1
  #let last_y = rows.len()
  #let stroke_fn = (x, y) => {
    let top = if y == 0 or y == 1 { thick_stroke } else { thin_stroke }
    let bottom = if y == 0 or y == last_y { thick_stroke } else { thin_stroke }
    let left = if x == 0 { thick_stroke } else if x == 2 { thick_sep } else { thin_stroke }
    let right = if x == last_x { thick_stroke } else { thin_stroke }
    (top: top, bottom: bottom, left: left, right: right)
  }

  // Light gray background for first two columns (first_name, last_name)
  #let fill_fn = (x, y) => if x < 2 { rgb("f2f2f2") } else { none }

  #table(
    columns: widths,
    stroke: stroke_fn,
    fill: fill_fn,
    table.header(..header_cells),
    ..body_cells,
  )
]

// ---- Output ----
#if dynamic_cols.len() == 0 {
  render_chunk(0, ())
} else {
  for (i, chunk) in dynamic_chunks.enumerate() {
    render_chunk(i, chunk)
    if i < dynamic_chunks.len() - 1 { pagebreak() }
  }
}