#!/usr/bin/env bash
# Builds VibEdit for Windows from any OS (pure Go, no C toolchain needed).
#
#   ./build.sh             -> dist/vibedit.exe
#   ./build.sh --package   -> also downloads a Windows ffmpeg build and creates
#                             dist/VibEdit-windows-x64.zip (exe + ffmpeg, ready to run)
set -euo pipefail
cd "$(dirname "$0")"

VERSION=1.0.0
FFMPEG_URL=https://www.gyan.dev/ffmpeg/builds/ffmpeg-release-essentials.zip

GO=${GO:-go}
if ! command -v "$GO" >/dev/null 2>&1 && [ -x "$HOME/.local/go/bin/go" ]; then
  GO="$HOME/.local/go/bin/go"
fi

mkdir -p dist
GOOS=windows GOARCH=amd64 CGO_ENABLED=0 "$GO" build -trimpath \
  -ldflags "-s -w -X main.version=$VERSION" -o dist/vibedit.exe .
echo "Built dist/vibedit.exe"

if [ "${1:-}" != "--package" ]; then
  exit 0
fi

mkdir -p dist/cache
if [ ! -f dist/cache/ffmpeg-essentials.zip ]; then
  echo "Downloading ffmpeg for Windows from gyan.dev ..."
  wget -q --show-progress -O dist/cache/ffmpeg-essentials.zip.tmp "$FFMPEG_URL"
  mv dist/cache/ffmpeg-essentials.zip.tmp dist/cache/ffmpeg-essentials.zip
fi

rm -rf dist/VibEdit dist/VibEdit-windows-x64.zip
mkdir -p dist/VibEdit
cp dist/vibedit.exe dist/VibEdit/
cp package-readme.txt dist/VibEdit/README.txt

python3 - <<'EOF'
import os, zipfile

src = zipfile.ZipFile("dist/cache/ffmpeg-essentials.zip")
wanted = {"ffmpeg.exe": "ffmpeg.exe", "ffprobe.exe": "ffprobe.exe", "LICENSE": "ffmpeg-LICENSE.txt"}
found = set()
for info in src.infolist():
    base = os.path.basename(info.filename)
    if base in wanted and base not in found:
        with open(os.path.join("dist/VibEdit", wanted[base]), "wb") as f:
            f.write(src.read(info))
        found.add(base)
missing = set(wanted) - found
if missing:
    raise SystemExit("ffmpeg zip is missing: " + ", ".join(sorted(missing)))

with zipfile.ZipFile("dist/VibEdit-windows-x64.zip", "w", zipfile.ZIP_DEFLATED) as out:
    for name in sorted(os.listdir("dist/VibEdit")):
        out.write(os.path.join("dist/VibEdit", name), "VibEdit/" + name)
EOF
echo "Packaged dist/VibEdit-windows-x64.zip"