#!/usr/bin/env bash
#
# windows-publish.sh — cross-build the Windows installer and add it to a downloads folder.
#
# Usage:
#   ./scripts/windows-publish.sh ~/win-mtgc
#
# Or through npm: `npm run windows:publish -- ~/win-mtgc`.
#
# Options:
#   --allow-dirty   publish uncommitted changes; the file name gets a -dirty suffix
#
# Environment:
#   MTGC_WINDOWS_DIR  downloads directory, if not given as an argument
#
# Builds on Linux for x86_64-pc-windows-msvc through cargo-xwin, which fetches
# the MSVC CRT and Windows SDK into ~/.cache/cargo-xwin the first time. Only
# the NSIS installer can be made off Windows (MSI needs WiX). The directory is
# public — serve it as is. Needs `sudo dnf install mingw-nsis-base llvm lld
# clang`, `cargo install --locked cargo-xwin`, `rustup target add
# x86_64-pc-windows-msvc`, and the desktop setup from ./scripts/devel-setup.sh.
#
set -euo pipefail

usage() {
    sed -n '3,22p' "$0" | sed 's/^# \{0,1\}//'
    exit "${1:-0}"
}

info() { printf '\033[1;34m==>\033[0m %s\n' "$*"; }
warn() { printf '\033[1;33m[warn]\033[0m %s\n' "$*"; }
err()  { printf '\033[1;31m[err]\033[0m %s\n' "$*" >&2; }

PACKAGE="mtgc"
TARGET="x86_64-pc-windows-msvc"
LATEST="$PACKAGE-latest-x64-setup.exe"
KEEP=3  # versions kept in the folder, so a bad release can be rolled back

allow_dirty=false
dir="${MTGC_WINDOWS_DIR:-}"
while [ $# -gt 0 ]; do
    case "$1" in
        --allow-dirty) allow_dirty=true ;;
        -h | --help) usage ;;
        -*) usage 1 ;;
        *) dir="$1" ;;
    esac
    shift
done
[ -n "$dir" ] || usage 1
mkdir -p "$dir"
dir="$(cd "$dir" && pwd)"

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

# --- 1. Tools ---------------------------------------------------------------

for tool in makensis llvm-rc lld-link clang; do
    if ! command -v "$tool" >/dev/null 2>&1; then
        err "$tool not found. Install them: sudo dnf install mingw-nsis-base llvm lld clang"
        exit 1
    fi
done
if ! command -v cargo-xwin >/dev/null 2>&1; then
    err "cargo-xwin not found. Install it: cargo install --locked cargo-xwin"
    exit 1
fi
if command -v rustup >/dev/null 2>&1 && ! rustup target list --installed | grep -qxF "$TARGET"; then
    err "the $TARGET Rust target is missing. Add it: rustup target add $TARGET"
    exit 1
fi

# --- 2. Version -------------------------------------------------------------
#
# The installer's own version stays numeric (NSIS insists); a dirty build is
# only marked in the file name.

source scripts/lib/release-version.sh
file_version="$release_version"
if $release_dirty; then
    if ! $allow_dirty; then
        err "the working tree has uncommitted changes; commit them or pass --allow-dirty"
        exit 1
    fi
    file_version="$release_version-dirty"
fi

# --- 3. Only ever move forward ----------------------------------------------

newest=0
for exe in "$dir/${PACKAGE}"_*_x64-setup.exe; do
    [ -e "$exe" ] || continue
    patch="${exe##*/${PACKAGE}_}"
    patch="${patch%_x64-setup.exe}"
    patch="${patch%-dirty}"
    patch="${patch##*.}"
    [ "$patch" -gt "$newest" ] && newest="$patch"
done
if [ "$release_count" -le "$newest" ]; then
    err "version $release_version is not newer than the folder's x.y.$newest; commit something first"
    exit 1
fi

# --- 4. Build ---------------------------------------------------------------

info "building $file_version for $TARGET"
outputs="target/$TARGET/release/bundle/nsis"
rm -rf "$outputs"
cargo tauri build --runner cargo-xwin --target "$TARGET" --bundles nsis --ci \
    --config "{\"version\":\"$release_version\"}"

built="$(find "$outputs" -name '*-setup.exe' | head -1)"
if [ -z "$built" ]; then
    err "the build produced no installer under $outputs"
    exit 1
fi

# --- 5. Publish -------------------------------------------------------------

name="${PACKAGE}_${file_version}_x64-setup.exe"
cp "$built" "$dir/$name"
# A copy, not a symlink, so the stable link survives rsync and any static host.
cp "$built" "$dir/.$LATEST.tmp"
mv -f "$dir/.$LATEST.tmp" "$dir/$LATEST"

# Drop all but the newest few versions.
mapfile -t old < <(find "$dir" -maxdepth 1 -name "${PACKAGE}_*_x64-setup.exe" | sort -V | head -n -"$KEEP")
if [ "${#old[@]}" -gt 0 ]; then
    rm -f "${old[@]}"
fi

(cd "$dir" && sha256sum "$LATEST" "${PACKAGE}"_*_x64-setup.exe >SHA256SUMS)

# --- 6. How to use it -------------------------------------------------------

info "published $file_version"
cat <<EOF

Serve $dir as is. It holds:

    $name
    $LATEST     (always the newest)
    SHA256SUMS

On Windows, download and run the setup.exe; running a newer one upgrades the
installed app in place. The installer is unsigned, so SmartScreen warns about
an unknown publisher the first time: More info → Run anyway.
EOF