#!/usr/bin/env bash
#
# Build release artifacts for all platforms.
#
# Usage: scripts/build-artifacts [OPTIONS]
#
# Options:
#   --only-dmg        Build macOS aarch64 DMG only
#   --only-deb        Build Linux amd64 deb only
#   --only-appimage   Build Linux amd64 AppImage only
#   --rebuild-image   Force rebuild of podman container images
#   --clean           Wipe target-release/, node_modules/ and Linux build volumes
#   --help            Show this help

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"

# ---- Flags ----

BUILD_DMG=true
BUILD_DEB=true
BUILD_APPIMAGE=true
REBUILD_IMAGE=false
CLEAN=false

for arg in "$@"; do
  case "$arg" in
    --only-dmg)      BUILD_DMG=true;  BUILD_DEB=false; BUILD_APPIMAGE=false ;;
    --only-deb)      BUILD_DMG=false; BUILD_DEB=true;  BUILD_APPIMAGE=false ;;
    --only-appimage) BUILD_DMG=false; BUILD_DEB=false; BUILD_APPIMAGE=true  ;;
    --rebuild-image) REBUILD_IMAGE=true ;;
    --clean)         CLEAN=true; BUILD_DMG=false; BUILD_DEB=false; BUILD_APPIMAGE=false ;;
    --help|-h)
      head -20 "$0" | grep '^#' | sed 's/^# \?//'
      exit 0
      ;;
    *) echo "Unknown option: $arg" >&2; exit 1 ;;
  esac
done

# ---- Helpers ----

step() { echo; echo "==> $*"; }

# Builds a container image if it does not already exist (or --rebuild-image).
# $1: image name, $2: dockerfile path (relative to PROJECT_DIR), $3: platform
ensure_image() {
  local name="$1"
  local dockerfile="$2"
  local platform="$3"
  if [[ "$REBUILD_IMAGE" == true ]] || ! podman image exists "$name" 2>/dev/null; then
    echo "    Building container image: $name"
    podman build \
      --platform "$platform" \
      -t "$name" \
      -f "$PROJECT_DIR/$dockerfile" \
      "$PROJECT_DIR"
  fi
}

# ---- Version and output directory ----

VERSION="$(jq -r '.version' "$PROJECT_DIR/crates/radicle-tauri/tauri.conf.json")"
RELEASE_SHA="$(git -C "$PROJECT_DIR" rev-parse HEAD)"
SHORT_SHA="$(git -C "$PROJECT_DIR" rev-parse --short=8 HEAD)"
RELEASE_DIR="$PROJECT_DIR/releases/v$VERSION"

step "Building release v$VERSION (${SHORT_SHA})"
echo "    Output: $RELEASE_DIR"
mkdir -p "$RELEASE_DIR"

# ---- Preflight ----
#
# The Linux deb/AppImage builds run in Podman; the macOS DMG does not. Fail
# fast here (before the slow native DMG build) if a Linux build is requested
# but Podman is unavailable.

if [[ "$BUILD_DEB" == true || "$BUILD_APPIMAGE" == true ]]; then
  command -v podman >/dev/null 2>&1 || { echo "Error: podman not found" >&2; exit 1; }
  podman info >/dev/null 2>&1 || {
    echo "Error: Podman is not running — start it (e.g. 'podman machine start')" >&2
    exit 1
  }
fi

# ---- Clean ----

if [[ "$CLEAN" == true ]]; then
  step "Cleaning build artifacts"
  rm -rf "$PROJECT_DIR/target-release"
  rm -rf "$PROJECT_DIR/node_modules"
  podman volume rm radicle-desktop-linux-target radicle-desktop-linux-nm radicle-desktop-linux-cargo 2>/dev/null || true
  podman image rm radicle-desktop-release-builder 2>/dev/null || true
  echo "    Cleaned"
fi

# ---- macOS aarch64 DMG ----

if [[ "$BUILD_DMG" == true ]]; then
  step "Building macOS aarch64 DMG"
  cd "$PROJECT_DIR"
  npm install
  CARGO_TARGET_DIR="$PROJECT_DIR/target-release" \
    npm exec -- tauri build --bundles dmg
  cp "target-release/release/bundle/dmg/Radicle_${VERSION}_aarch64.dmg" \
    "$RELEASE_DIR/radicle-desktop-aarch64.dmg"
  echo "    radicle-desktop-aarch64.dmg"
fi

# ---- Linux amd64 deb ----
#
# Runs in the native ARM64 Ubuntu container, which cross-compiles Rust to
# x86_64. Build artifacts are cached in named podman volumes so subsequent
# runs only recompile what changed.
#
# When to clear volumes:
#   After a Rust toolchain bump or dependency change that confuses incremental
#   compilation: podman volume rm radicle-desktop-linux-target radicle-desktop-linux-cargo
#   After a major npm dependency change: podman volume rm radicle-desktop-linux-nm

if [[ "$BUILD_DEB" == true ]]; then
  step "Building Linux amd64 deb"
  ensure_image "radicle-desktop-release-builder" "Dockerfile.release" "linux/arm64"

  podman run --rm \
    -v "$PROJECT_DIR:/workspace:z" \
    -v radicle-desktop-linux-target:/workspace/target:z \
    -v radicle-desktop-linux-nm:/workspace/node_modules:z \
    -v radicle-desktop-linux-cargo:/root/.cargo/registry:z \
    -v "$RELEASE_DIR:/output:z" \
    -w /workspace \
    -e CI=true \
    radicle-desktop-release-builder \
    bash -c "
      set -euo pipefail
      npm ci
      npm exec -- tauri build --target x86_64-unknown-linux-gnu --bundles deb
      cp \"target/x86_64-unknown-linux-gnu/release/bundle/deb/radicle-desktop_${VERSION}_amd64.deb\" /output/
    "

  echo "    radicle-desktop_${VERSION}_amd64.deb"
fi

# ---- Linux amd64 AppImage ----
#
# See scripts/appimage-build for the full setup. Key points:
# - --privileged to mount binfmt_misc for x86_64 emulation via QEMU
# - APPIMAGE_EXTRACT_AND_RUN=1 so linuxdeploy-x86_64.AppImage runs without FUSE
# - PKG_CONFIG_PATH for the GTK plugin to find amd64 packages
# - PATH includes libgtk-3-0t64 dir where gtk-query-immodules-3.0 lives
# The script is mounted from the workspace (heredocs pipe to host, not container)

if [[ "$BUILD_APPIMAGE" == true ]]; then
  step "Building Linux amd64 AppImage"
  ensure_image "radicle-desktop-release-builder" "Dockerfile.release" "linux/arm64"

  podman run --rm \
    --privileged \
    -v "$PROJECT_DIR:/workspace:z" \
    -v radicle-desktop-linux-target:/workspace/target:z \
    -v radicle-desktop-linux-nm:/workspace/node_modules:z \
    -v radicle-desktop-linux-cargo:/root/.cargo/registry:z \
    -v "$RELEASE_DIR:/output:z" \
    -w /workspace \
    -e CI=true \
    radicle-desktop-release-builder \
    bash /workspace/scripts/appimage-build

  # Strip the version so the filename matches what the website serves
  # (the DMG above is renamed the same way).
  mv "$RELEASE_DIR/radicle-desktop_${VERSION}_amd64.AppImage" \
    "$RELEASE_DIR/radicle-desktop-amd64.AppImage"
  echo "    radicle-desktop-amd64.AppImage"
fi

if [[ "$CLEAN" == false ]]; then
  # ---- latest.json ----

  step "Generating latest.json"
  printf '{"sha": "%s", "version": "%s"}' "$RELEASE_SHA" "$VERSION" \
    > "$RELEASE_DIR/latest.json"
  echo "    latest.json"

  # ---- Summary ----

  echo
  echo "Done. Artifacts in $RELEASE_DIR:"
  ls -lh "$RELEASE_DIR"
fi