#!/bin/sh
set -eu

DEPS="curl jq unzip"

for dep in $DEPS; do
    if ! command -v "$dep" >/dev/null 2>&1; then
        echo "Error: '$dep' is required but not installed." >&2
        exit 1
    fi
done

if [ "${1:-}" = "--android" ]; then
    if ! command -v adb >/dev/null 2>&1; then
        echo "Warning: '--android' specified but 'adb' not found. Android install may fail." >&2
    fi
fi

USER_AGENT="Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36"
API_URL="https://api.github.com/repos/eatmynerds/lobster-rs/releases/latest"
TEMP_DIR="./temp-lobster"
ARCH=$(uname -m)
OS=$(uname -s | tr '[:upper:]' '[:lower:]')

case "$ARCH" in
    i386|i486|i586|i686)
        echo "Error: 32-bit x86 architectures are not supported. Compile from source instead."
        exit 1
        ;;
esac

rm -rf "$TEMP_DIR"
mkdir -p "$TEMP_DIR"

DOWNLOAD_URL=$(curl -sSL -H "User-Agent: $USER_AGENT" "$API_URL" | jq -r '.assets[0].browser_download_url')
if [ -z "$DOWNLOAD_URL" ] || [ "$DOWNLOAD_URL" = "null" ]; then
    echo "Error: No download URL found."
    exit 1
fi

curl -sSL "$DOWNLOAD_URL" -o "$TEMP_DIR/asset.zip"
unzip -q "$TEMP_DIR/asset.zip" -d "$TEMP_DIR"

if command -v getprop >/dev/null 2>&1; then
    OS="android"
fi
if [ "${1:-}" = "--android" ] && command -v adb >/dev/null 2>&1; then
    OS="android"
    ARCH=$(adb shell uname -m)
fi

case "$OS" in
    *linux*)   BUILD_TARGET="${ARCH}-unknown-linux-gnu_lobster-rs" ;;
    *darwin*)  BUILD_TARGET="${ARCH}-apple-darwin_lobster-rs" ;;
    *android*) BUILD_TARGET="${ARCH}-linux-android_lobster-rs" ;;
    *msys*|*cygwin*|*mingw*|*windows*) BUILD_TARGET="${ARCH}-pc-windows-msvc_lobster-rs.exe" ;;
    *)
        echo "Error: Unsupported platform $OS-$ARCH"
        exit 1
        ;;
esac

FOUND_FILE=$(find "$TEMP_DIR" -type f -name "$BUILD_TARGET" 2>/dev/null || true)
if [ -z "$FOUND_FILE" ]; then
    echo "Error: Build target not found."
    exit 1
fi

case "$OS" in
    *msys*|*cygwin*|*mingw*|*windows*) DEST_PATH="./lobster-rs.exe" ;;
    *) DEST_PATH="./lobster-rs" ;;
esac

mv "$FOUND_FILE" "$DEST_PATH"
chmod +x "$DEST_PATH"

rm -rf "$TEMP_DIR"
echo "Done! Binary saved to $DEST_PATH."