# overlays/vscode-modernized/default.nix
{ ... }:

final: prev:

let
  modernized = prev.fetchFromGitHub {
    owner = "Sukarth";
    repo = "VS-Code-Modernized";
    # Pin this once working.
    rev = "main";
    hash = "sha256-QSmdmCoF2L42ZUxYpJXq6REOdNObK9DBI6c0GEQ32rQ=";
  };

  injectModernized = vscodePkg:
    vscodePkg.overrideAttrs (old: {
      postInstall = (old.postInstall or "") + ''
        (
          set -euo pipefail

          candidates=(
            "$out/lib/vscode/resources/app/out/vs/code/electron-sandbox/workbench/workbench.html"
            "$out/lib/vscode/resources/app/out/vs/code/electron-sandbox/workbench/workbench.esm.html"
            "$out/lib/vscode/resources/app/out/vs/code/electron-browser/workbench/workbench.html"
            "$out/lib/vscode/resources/app/out/vs/code/electron-browser/workbench/workbench.esm.html"
          )

          workbench=""
          for candidate in "''${candidates[@]}"; do
            if [ -f "$candidate" ]; then
              workbench="$candidate"
              break
            fi
          done

          if [ -z "$workbench" ]; then
            echo "VS Code Modernized: could not find workbench.html" >&2
            find "$out/lib/vscode/resources/app/out/vs" -name 'workbench*.html' -print >&2 || true
            exit 1
          fi

          # Build one self-contained CSS file.
          cat > /tmp/vscode-modernized-inline.css <<'EOF'
/* VS Code Modernized dynamic settings */
:root {
  --vscode-modernized-spacing: 0.35rem;
  --vscode-modernized-border-radius: 0.5rem;
  --vscode-modernized-tab-spacing: 0.2rem;
}
EOF

          cat "${modernized}/styles/styles.css" >> /tmp/vscode-modernized-inline.css

          # Smoke-test styles. Remove later if you want.
          cat >> /tmp/vscode-modernized-inline.css <<'EOF'

/* Modernized dims inactive icons to 20%; let the theme control contrast instead. */
.monaco-workbench .part.activitybar .monaco-action-bar .action-item.icon:not(.disabled) {
  opacity: 1;
}

/* Nix smoke test: these should be very visible */
.monaco-workbench .part.sidebar,
.monaco-workbench .part.auxiliarybar,
.monaco-workbench .part.panel,
.monaco-workbench .editor-group-container,
.monaco-workbench .tabs-container,
.monaco-workbench .tab,
.monaco-workbench .monaco-list-row,
.monaco-workbench .quick-input-widget {
  border-radius: var(--vscode-modernized-border-radius) !important;
  overflow: hidden !important;
}

.monaco-workbench .part.sidebar,
.monaco-workbench .part.panel,
.monaco-workbench .editor-group-container {
  margin: var(--vscode-modernized-spacing) !important;
}
EOF

          css="$(sed \
            -e 's/&/\&amp;/g' \
            -e 's/</\&lt;/g' \
            -e 's/>/\&gt;/g' \
            /tmp/vscode-modernized-inline.css)"

          inject="
<!-- VS Code Modernized - Nix injected -->
<style id=\"vscode-modernized-nix\">
$css
</style>
<!-- /VS Code Modernized - Nix injected -->
"

          substituteInPlace "$workbench" \
            --replace-fail '</html>' "$inject
</html>"
        )
      '';
    });
in
{
  vscode-modernized = injectModernized prev.vscode;
}