#!/bin/bash
set -e

RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

info()  { echo -e "${GREEN}[*]${NC} $1"; }
warn()  { echo -e "${YELLOW}[!]${NC} $1"; }
error() { echo -e "${RED}[x]${NC} $1"; exit 1; }

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"

echo "==================================="
echo "  x3-Backup Install Script"
echo "==================================="
echo ""

# ── Detect distro ──
detect_distro() {
    if [ -f /etc/os-release ]; then
        . /etc/os-release
        echo "$ID"
    elif command -v pacman &>/dev/null; then
        echo "arch"
    elif command -v emerge &>/dev/null; then
        echo "gentoo"
    elif command -v zypper &>/dev/null; then
        echo "opensuse"
    elif command -v dnf &>/dev/null; then
        echo "fedora"
    else
        echo "unknown"
    fi
}

DISTRO=$(detect_distro)
info "Detected distro: $DISTRO"

# ── Check if running as root ──
if [ "$EUID" -eq 0 ]; then
    SUDO=""
else
    SUDO="sudo"
fi

# ── Install dependencies ──
install_deps() {
    info "Installing build dependencies..."

    case "$DISTRO" in
        arch|manjaro)
            $SUDO pacman -S --needed --noconfirm \
                base-devel autoconf autoconf-archive automake libtool \
                gtk3 json-glib rsync pkg-config
            ;;
        ubuntu|debian|linuxmint|pop)
            $SUDO apt update
            $SUDO apt install -y \
                build-essential autoconf automake pkg-config \
                libgtk-3-dev libjson-glib-dev rsync
            ;;
        fedora)
            $SUDO dnf install -y \
                gcc-c++ autoconf automake pkgconfig \
                gtk3-devel json-glib-devel rsync
            ;;
        opensuse*)
            $SUDO zypper install -y \
                gcc-c++ autoconf automake pkg-config \
                gtk3-devel json-glib-devel rsync
            ;;
        gentoo)
            $SUDO emerge --ask dev-build/autoconf dev-build/automake \
                dev-util/pkgconfig x11-libs/gtk+:3 \
                dev-libs/json-glib net-misc/rsync
            ;;
        *)
            warn "Unknown distro. Please install manually:"
            warn "  autoconf automake pkg-config libgtk-3-dev libjson-glib-dev rsync"
            echo -n "Press Enter when done, or 'q' to quit: "
            read -r answer
            [ "$answer" = "q" ] && exit 1
            ;;
    esac

    info "Dependencies installed."
}

# ── Build ──
build() {
    info "Building x3-backup..."
    cd "$SCRIPT_DIR"

    # Clean previous build
    if [ -f Makefile ]; then
        make distclean 2>/dev/null || true
    fi

    autoreconf -fi
    ./configure
    make -j"$(nproc)"
    info "Build successful."
}

# ── Install ──
install_app() {
    info "Installing x3-backup..."
    cd "$SCRIPT_DIR"
    $SUDO make install
    info "Installed to /usr/local/bin/x3-backup"
}

# ── Main ──
case "${1:-all}" in
    deps)
        install_deps
        ;;
    build)
        build
        ;;
    install)
        install_app
        ;;
    all)
        install_deps
        build
        install_app
        echo ""
        info "==================================="
        info "  x3-Backup installed successfully!"
        info "==================================="
        echo ""
        info "Run: x3-backup"
        info "Or:  ./src/x3-backup  (local build)"
        ;;
    *)
        echo "Usage: $0 [deps|build|install|all]"
        echo ""
        echo "  deps     Install dependencies only"
        echo "  build    Build only"
        echo "  install  Install to /usr/local"
        echo "  all      Do everything (default)"
        exit 1
        ;;
esac