#!/bin/bash
# Build osdialog static library for Linux (zenity backend)
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
REPO_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
OSDIALOG_DIR="$SCRIPT_DIR/vendor/osdialog"
OUTPUT_DIR="$SCRIPT_DIR/build"
mkdir -p "$OUTPUT_DIR"

ensure_osdialog_submodule() {
    if [ -f "$OSDIALOG_DIR/osdialog.c" ] && [ -f "$OSDIALOG_DIR/osdialog_zenity.c" ]; then
        return 0
    fi

    echo "osdialog sources not found at: $OSDIALOG_DIR"
    echo "Attempting to initialize git submodules..."

    if command -v git >/dev/null 2>&1; then
        git -C "$REPO_ROOT" submodule update --init --recursive odin/vendor/osdialog || true
    fi

    if [ ! -f "$OSDIALOG_DIR/osdialog.c" ] || [ ! -f "$OSDIALOG_DIR/osdialog_zenity.c" ]; then
        echo "error: osdialog submodule is missing. Run: git submodule update --init --recursive" >&2
        exit 1
    fi
}

ensure_osdialog_submodule

LIB_OUT="$OUTPUT_DIR/libosdialog.a"

# Only rebuild if sources changed
SOURCES=("$OSDIALOG_DIR/osdialog.c" "$OSDIALOG_DIR/osdialog_zenity.c")
NEED_REBUILD=false
for src in "${SOURCES[@]}"; do
    if [ "$src" -nt "$LIB_OUT" ] 2>/dev/null; then
        NEED_REBUILD=true
        break
    fi
done

if [ "$NEED_REBUILD" = false ] && [ -f "$LIB_OUT" ]; then
    echo "osdialog already built. Skipping."
    exit 0
fi

echo "Building osdialog (zenity backend)..."
for src in "${SOURCES[@]}"; do
    obj="${OUTPUT_DIR}/$(basename "${src%.c}.o")"
    echo "  CC $src"
    gcc -c -O2 -std=c99 -I"$OSDIALOG_DIR" "$src" -o "$obj"
done

if [ "$(uname -s)" = "Darwin" ]; then
    libtool -static -o "$LIB_OUT" "$OUTPUT_DIR"/osdialog.o "$OUTPUT_DIR"/osdialog_zenity.o
else
    ar rcs "$LIB_OUT" "$OUTPUT_DIR"/osdialog.o "$OUTPUT_DIR"/osdialog_zenity.o
fi

echo "  AR $LIB_OUT"
echo "osdialog build complete."