#!/usr/bin/env bash
# generate-assets.sh — Generate FiberOps PNG assets from SVG sources
#
# Requirements (install one):
#   brew install inkscape        (macOS / Linux)
#   brew install librsvg         (lighter: rsvg-convert)
#   apt-get install librsvg2-bin (Debian/Ubuntu)
#
# Usage:
#   ./scripts/generate-assets.sh
#
# Output: assets/*.png (overwrites existing files)

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
ASSETS="$REPO_ROOT/assets"
SVGS="$SCRIPT_DIR/svg"

# ---------------------------------------------------------------------------
# Check for a suitable SVG renderer
# ---------------------------------------------------------------------------
if command -v inkscape &>/dev/null; then
  RENDERER="inkscape"
elif command -v rsvg-convert &>/dev/null; then
  RENDERER="rsvg"
else
  echo "ERROR: Install inkscape or librsvg (rsvg-convert) first." >&2
  echo "  macOS:  brew install inkscape  OR  brew install librsvg" >&2
  echo "  Linux:  apt-get install inkscape  OR  apt-get install librsvg2-bin" >&2
  exit 1
fi

export_png() {
  local svg="$1" out="$2" w="$3" h="$4"
  echo "  → $out (${w}×${h})"
  if [[ "$RENDERER" == "inkscape" ]]; then
    inkscape --export-type=png \
             --export-filename="$out" \
             --export-width="$w" \
             --export-height="$h" \
             "$svg" 2>/dev/null
  else
    rsvg-convert -w "$w" -h "$h" -o "$out" "$svg"
  fi
}

mkdir -p "$SVGS"

# ---------------------------------------------------------------------------
# Inline SVG sources (written to scripts/svg/ so they can be edited)
# ---------------------------------------------------------------------------

# 1. icon-bg.svg  — opaque cyan square with "FO" (used for icon.png)
cat > "$SVGS/icon-bg.svg" <<'SVG'
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1024 1024" width="1024" height="1024">
  <rect width="1024" height="1024" rx="230" ry="230" fill="#0891B2"/>
  <text x="512" y="590"
        font-family="'Fira Sans', 'Inter', sans-serif"
        font-weight="700"
        font-size="460"
        text-anchor="middle"
        fill="#FFFFFF">FO</text>
</svg>
SVG

# 2. icon-fg.svg  — transparent background, white "FO" (adaptive icon foreground)
cat > "$SVGS/icon-fg.svg" <<'SVG'
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1024 1024" width="1024" height="1024">
  <text x="512" y="590"
        font-family="'Fira Sans', 'Inter', sans-serif"
        font-weight="700"
        font-size="460"
        text-anchor="middle"
        fill="#FFFFFF">FO</text>
</svg>
SVG

# 3. splash.svg   — transparent, centered logo for splash (composited over #F8FAFC)
cat > "$SVGS/splash.svg" <<'SVG'
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1024 1024" width="1024" height="1024">
  <!-- Circle backdrop -->
  <circle cx="512" cy="430" r="220" fill="#0891B2"/>
  <!-- "FO" inside circle -->
  <text x="512" y="505"
        font-family="'Fira Sans', 'Inter', sans-serif"
        font-weight="700"
        font-size="200"
        text-anchor="middle"
        fill="#FFFFFF">FO</text>
  <!-- "FiberOps" wordmark below -->
  <text x="512" y="730"
        font-family="'Fira Sans', 'Inter', sans-serif"
        font-weight="600"
        font-size="110"
        text-anchor="middle"
        fill="#0891B2">FiberOps</text>
</svg>
SVG

# 4. favicon.svg  — tiny "F" on cyan
cat > "$SVGS/favicon.svg" <<'SVG'
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48">
  <rect width="48" height="48" rx="8" fill="#0891B2"/>
  <text x="24" y="36"
        font-family="'Fira Sans', 'Inter', sans-serif"
        font-weight="700"
        font-size="30"
        text-anchor="middle"
        fill="#FFFFFF">F</text>
</svg>
SVG

# 5. monochrome.svg — white "FO" on transparent (Android 13 themed icon)
cat > "$SVGS/monochrome.svg" <<'SVG'
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1024 1024" width="1024" height="1024">
  <text x="512" y="590"
        font-family="'Fira Sans', 'Inter', sans-serif"
        font-weight="700"
        font-size="460"
        text-anchor="middle"
        fill="#FFFFFF">FO</text>
</svg>
SVG

# ---------------------------------------------------------------------------
# Export PNGs
# ---------------------------------------------------------------------------
echo "Exporting PNGs..."

export_png "$SVGS/icon-bg.svg"    "$ASSETS/icon.png"                    1024 1024
export_png "$SVGS/icon-fg.svg"    "$ASSETS/adaptive-icon.png"           1024 1024
export_png "$SVGS/icon-fg.svg"    "$ASSETS/android-icon-foreground.png" 1024 1024
export_png "$SVGS/icon-bg.svg"    "$ASSETS/android-icon-background.png" 1024 1024
export_png "$SVGS/monochrome.svg" "$ASSETS/android-icon-monochrome.png" 1024 1024
export_png "$SVGS/splash.svg"     "$ASSETS/splash-icon.png"             1024 1024
export_png "$SVGS/favicon.svg"    "$ASSETS/favicon.png"                 48   48

echo ""
echo "Done. Files written to assets/"
echo "Verify with: ls -lh assets/*.png"