#!/bin/sh
set -eu

usage() {
    echo "usage: $0 --output ABSOLUTE_DIR --target-dir ABSOLUTE_DIR" >&2
    exit 2
}

output=
target_dir=
while test "$#" -gt 0; do
    case "$1" in
        --output)
            test "$#" -ge 2 || usage
            output=$2
            shift 2
            ;;
        --target-dir)
            test "$#" -ge 2 || usage
            target_dir=$2
            shift 2
            ;;
        *) usage ;;
    esac
done

test -n "$output" || usage
test -n "$target_dir" || usage
case "$output:$target_dir" in
    /*:/*) ;;
    *) usage ;;
esac
case "$output/:$target_dir/" in
    "$target_dir/"*:*|*:"$output/"*)
        echo "output and target directory must be separate" >&2
        exit 2
        ;;
esac

ROOT=$(CDPATH= cd -- "$(dirname "$0")/../.." && pwd)
case "$output" in
    "$ROOT"|"$ROOT"/*)
        echo "output must be outside the repository" >&2
        exit 2
        ;;
esac
case "$target_dir" in
    "$ROOT"|"$ROOT"/*)
        echo "target directory must be outside the repository" >&2
        exit 2
        ;;
esac
test ! -e "$output" || {
    echo "output already exists: $output" >&2
    exit 2
}
test ! -e "$target_dir" || {
    echo "target directory already exists: $target_dir" >&2
    exit 2
}
test "$(uname -s)" = Darwin || {
    echo "XCFramework packaging requires macOS" >&2
    exit 2
}

source_epoch=$(git -C "$ROOT" show -s --format=%ct HEAD)
export CARGO_INCREMENTAL=0
export CARGO_TARGET_DIR="$target_dir"
export MACOSX_DEPLOYMENT_TARGET=14.0
export RUSTFLAGS="--remap-path-prefix=$ROOT=."
export SOURCE_DATE_EPOCH="$source_epoch"
export ZERO_AR_DATE=1

cargo build \
    --manifest-path "$ROOT/core/Cargo.toml" \
    --target aarch64-apple-darwin \
    --release \
    --locked

headers="$target_dir/xcframework-headers"
mkdir -p "$headers" "$output"
cp "$ROOT/core/include/versevdi_core.h" "$headers/"
cp "$ROOT/core/include/module.modulemap" "$headers/"

xcodebuild -create-xcframework \
    -library "$target_dir/aarch64-apple-darwin/release/libversevdi_core.a" \
    -headers "$headers" \
    -output "$output/VerseVDICore.xcframework"

timestamp=$(date -r "$source_epoch" +%Y%m%d%H%M.%S)
find "$output/VerseVDICore.xcframework" -exec touch -h -t "$timestamp" {} +