nixos/custom-pkgs/md2pdf-cli/package.nix

{
  lib,
  pkgs,
}:
let
  stylesheet = pkgs.writeText "md2pdf-style.css" ''
    body {
      font-family: "Noto Sans", sans-serif;
      font-size: 11px;
      max-width: 100%;
      margin: 0;
      padding: 15px;
      line-height: 1.4;
    }
    h1 {
      font-size: 22px;
      border-bottom: 2px solid #333;
      padding-bottom: 5px;
      break-after: avoid;
    }
    h2 {
      font-size: 18px;
      margin-top: 25px;
      border-bottom: 1px solid #ccc;
      padding-bottom: 3px;
      break-after: avoid;
    }
    h3 {
      font-size: 14px;
      margin-top: 15px;
      break-after: avoid;
    }
    table {
      border-collapse: collapse;
      width: 100%;
      font-size: 10px;
      margin: 10px 0;
    }
    th {
      background: #f0f0f0;
      border: 1px solid #ccc;
      padding: 4px 6px;
      text-align: left;
      break-after: avoid;
      break-inside: avoid;
    }
    td {
      border: 1px solid #ccc;
      padding: 4px 6px;
      vertical-align: top;
      break-inside: avoid;
    }
    tr {
      break-inside: avoid;
      break-after: auto;
    }
    code {
      background: #f5f5f5;
      padding: 1px 3px;
      border-radius: 2px;
      font-family: "Noto Sans Mono", monospace;
      font-size: 10px;
    }
    pre {
      background: #f5f5f5;
      padding: 10px;
      border-radius: 4px;
      overflow-x: auto;
      font-size: 10px;
    }
    pre code {
      background: none;
      padding: 0;
    }
    blockquote {
      border-left: 3px solid #ccc;
      margin-left: 0;
      padding-left: 10px;
      color: #555;
    }
    img {
      max-width: 100%;
      height: auto;
      border: 1px solid #ddd;
      margin: 5px 0;
      break-inside: avoid;
    }
    em {
      color: #666;
    }
    a {
      color: #0066cc;
    }
  '';

  md-to-pdf = pkgs.buildNpmPackage {
    pname = "md-to-pdf";
    version = "5.2.5";

    src = pkgs.fetchFromGitHub {
      owner = "simonhaenisch";
      repo = "md-to-pdf";
      rev = "v5.2.5";
      hash = "sha256-6Zr4jidQ6cX2t6jKFqEnCSqvRtw4gZkqDKdv9SIyDC4=";
    };

    npmDepsHash = "sha256-AGn8g/nbkvWi4o6ENCnt7VexjfBIoDz+tl9eYvy+bao=";

    # canvas is an optional native dependency that fails to build in nix;
    # md-to-pdf works fine without it (puppeteer is used for PDF generation)
    npmFlags = [ "--ignore-scripts" ];

    postInstall = ''
      rm -rf $out/lib/node_modules/md-to-pdf/node_modules/canvas
    '';
  };
in
pkgs.stdenv.mkDerivation {
  pname = "md2pdf";
  version = "1.0.0";

  src = ./.;

  dontBuild = true;

  nativeBuildInputs = [ ];

  installPhase = ''
    runHook preInstall

    mkdir -p $out/bin $out/share/md2pdf

    cp ${stylesheet} $out/share/md2pdf/style.css

    cat > $out/bin/md2pdf << 'WRAPPER'
    #!/bin/sh
    export PUPPETEER_EXECUTABLE_PATH="@chromium@/bin/chromium"
    export PATH="@chromium@/bin''${PATH:+:''${PATH}}"
    exec "@md-to-pdf@/bin/md-to-pdf" \
      --stylesheet "@stylesheet@" \
      --pdf-options '{"format":"A4","margin":{"top":"10mm","bottom":"10mm","left":"12mm","right":"12mm"},"printBackground":true}' \
      "$@"
    WRAPPER

    substituteInPlace $out/bin/md2pdf \
      --replace-fail "@chromium@" "${pkgs.chromium}" \
      --replace-fail "@md-to-pdf@" "${md-to-pdf}" \
      --replace-fail "@stylesheet@" "$out/share/md2pdf/style.css"

    chmod +x $out/bin/md2pdf

    runHook postInstall
  '';

  meta = {
    description = "Convert Markdown to PDF with Noto Sans styling and tight margins";
    mainProgram = "md2pdf";
    platforms = lib.platforms.linux;
  };
}