#!/bin/bash
# Cross-compile JellyTau for Windows from Linux, producing an NSIS installer.
#
# Uses the OFFICIAL Tauri cross-compile path (https://v2.tauri.app/distribute/
# windows-installer/): the MSVC target driven by cargo-xwin, which downloads the
# MSVC CRT/Windows SDK headers and links with lld. This is the target Tauri
# officially supports for Windows (the mingw/GNU target is not), and unlike GNU
# it can bundle the NSIS installer from a Linux host.
#
# Playback on Windows: video renders via WebView2 and audio via the webview
# <audio> backend (WebviewAudioBackend) — see docs/build-windows.md.
#
# Requirements (present in the Docker windows-cross target / unified builder):
#   - rustup target x86_64-pc-windows-msvc
#   - cargo-xwin           (cargo install --locked cargo-xwin)
#   - lld, llvm            (linker + llvm-lib used by cargo-xwin)
#   - nsis (makensis)      (installer generator)
#
# Usage:
#   scripts/build-windows-cross.sh                    # exe + NSIS installer
#   WIN_BUNDLES=none scripts/build-windows-cross.sh   # exe only, skip bundling
#   OUTPUT_DIR=/app/dist scripts/build-windows-cross.sh
set -euo pipefail

cd "$(dirname "$0")/.."

TARGET="x86_64-pc-windows-msvc"
WIN_BUNDLES="${WIN_BUNDLES:-nsis}"

echo "🪟 Cross-compiling JellyTau for Windows ($TARGET, via cargo-xwin)"
echo "================================================================"
echo "Video plays via WebView2; audio via the webview <audio> backend."
echo "Bundles: $WIN_BUNDLES"
echo ""

bun install --frozen-lockfile 2>/dev/null || bun install
bun run build

# --runner cargo-xwin + the MSVC target is what makes the Tauri CLI treat this as
# a real Windows build and enable the nsis/msi bundlers on a Linux host.
#
# IMPORTANT: do NOT pass `--bundles nsis` here. tauri-cli 2.9.x validates the
# `--bundles` flag against a static clap enum gated by the HOST OS (Linux allows
# only deb/rpm/appimage) *before* it considers --target/--runner, so `--bundles
# nsis` is rejected at arg-parse time. Instead the Windows bundle targets come
# from tauri.conf.json (bundle.targets includes "nsis"), which is not subject to
# that CLI validation — the bundler then picks nsis once it knows the target is
# Windows.
if [[ "$WIN_BUNDLES" == "none" ]]; then
  bun run tauri build --runner cargo-xwin --target "$TARGET" --no-bundle
else
  bun run tauri build --runner cargo-xwin --target "$TARGET"
fi

BIN_DIR="src-tauri/target/$TARGET/release"
echo ""
echo "✅ Built Windows artifacts:"
find "$BIN_DIR" -maxdepth 1 -name '*.exe' -print
find "$BIN_DIR/bundle" -type f \( -name '*.exe' -o -name '*.msi' \) -print 2>/dev/null || true

if [[ -n "${OUTPUT_DIR:-}" ]]; then
  mkdir -p "$OUTPUT_DIR"
  find "$BIN_DIR" -maxdepth 1 -name 'jellytau.exe' -exec cp -v {} "$OUTPUT_DIR/" \;
  # NSIS setup installers land in bundle/nsis/*-setup.exe; MSI in bundle/msi/*.msi.
  find "$BIN_DIR/bundle" -type f \( -name '*-setup.exe' -o -name '*.msi' \) \
    -exec cp -v {} "$OUTPUT_DIR/" \; 2>/dev/null || true
  echo ""
  echo "📦 Copied Windows artifacts to $OUTPUT_DIR"
fi