#!/usr/bin/env bash
set -euo pipefail

# GyanDoot v2.0 — Cross-platform installer
# Detects OS, architecture, and installs the gyandoot binary + camofox-browser.
# For full documentation, visit: https://git.gyannetra.in/gnpl_admin/gyandoot-v2

GREEN='\033[0;32m'
BLUE='\033[0;34m'
YELLOW='\033[1;33m'
RED='\033[0;31m'
NC='\033[0m'

info()  { echo -e "${BLUE}[INFO]${NC} $*"; }
ok()    { echo -e "${GREEN}[OK]${NC} $*"; }
warn()  { echo -e "${YELLOW}[WARN]${NC} $*"; }
err()   { echo -e "${RED}[ERR]${NC} $*" >&2; exit 1; }

detect_architecture() {
    local arch
    arch="$(uname -m)"
    case "$arch" in
        x86_64|amd64)  echo "x86_64" ;;
        aarch64|arm64) echo "aarch64" ;;
        *) err "Unsupported architecture: $arch" ;;
    esac
}

detect_os() {
    local os
    os="$(uname -s)"
    case "$os" in
        Linux)  echo "linux" ;;
        Darwin) echo "darwin" ;;
        CYGWIN*|MINGW*|MSYS*) echo "windows" ;;
        *) err "Unsupported OS: $os" ;;
    esac
}

install_rust_if_needed() {
    if ! command -v cargo &>/dev/null; then
        info "Rust toolchain not found. Installing..."
        curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
        source "$HOME/.cargo/env"
        ok "Rust installed"
    else
        ok "Rust already installed ($(cargo --version))"
    fi
}

install_node_if_needed() {
    if ! command -v node &>/dev/null; then
        info "Node.js not found. Installing via nvm..."
        curl -fsSL https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.0/install.sh | bash
        [ -s "$HOME/.nvm/nvm.sh" ] && \. "$HOME/.nvm/nvm.sh"
        nvm install 22
        ok "Node.js installed ($(node --version))"
    else
        ok "Node.js already installed ($(node --version))"
    fi
}

install_camofox_browser() {
    local root_dir
    root_dir="$(cd "$(dirname "$0")" && pwd)"
    local camofox_dir="${CAMOFOX_DIR:-$HOME/camofox-browser}"
    if [ -d "$camofox_dir" ] && [ -f "$camofox_dir/package.json" ]; then
        info "Camofox-browser already cloned. Updating..."
        cd "$camofox_dir" && git pull --ff-only 2>/dev/null || true
        cd "$root_dir"
    else
        info "Cloning camofox-browser..."
        git clone https://github.com/jo-inc/camofox-browser.git "$camofox_dir"
        info "Installing camofox-browser dependencies..."
        cd "$camofox_dir"
        npm install --ignore-scripts 2>&1 | tail -3
        cd "$root_dir"
    fi
    ok "Camofox-browser ready"
}

setup_camofox_service() {
    local os
    os=$(detect_os)

    info "Setting up camofox-browser as a background service..."
    case "$os" in
        linux)
            # Create systemd service
            local service_file="/etc/systemd/system/camofox-browser.service"
            if [ ! -f "$service_file" ]; then
                cat > /tmp/camofox-browser.service << 'SYSTEMD'
[Unit]
Description=Camofox Browser — Anti-detection browser server for AI agents
After=network.target

[Service]
Type=simple
User=%s
WorkingDirectory=%s
ExecStart=/usr/bin/node server.js
Restart=on-failure
RestartSec=5
Environment=NODE_ENV=production
Environment=PORT=9377

[Install]
WantedBy=multi-user.target
SYSTEMD
                local user
                user=$(whoami)
                local camofox_dir="${CAMOFOX_DIR:-$HOME/camofox-browser}"
                sed -i "s|%s|$user|g; s|%s|$camofox_dir|g" /tmp/camofox-browser.service
                sudo mv /tmp/camofox-browser.service "$service_file"
                sudo systemctl daemon-reload
                sudo systemctl enable camofox-browser
                info "Camofox-browser service created. Start with: sudo systemctl start camofox-browser"
            else
                ok "Camofox-browser service already exists"
            fi
            ;;
        darwin)
            info "macOS detected. Add 'cd $HOME/camofox-browser && npm start' to your startup items."
            ;;
        windows)
            info "Windows detected. Use 'npm start' in the camofox-browser directory."
            ;;
    esac
    ok "Camofox-browser setup complete"
}

build_release() {
    local root_dir
    root_dir="$(cd "$(dirname "$0")" && pwd)"
    info "Building GyanDoot v2.0 in release mode..."
    cd "$root_dir"
    if [ ! -f "$root_dir/Cargo.toml" ]; then
        # Fallback: find Cargo.toml in parent chain (in case script is in sub-dir)
        local probe
        probe="$(pwd)"
        while [ "$probe" != "/" ]; do
            if [ -f "$probe/Cargo.toml" ] && grep -q '\[workspace\]' "$probe/Cargo.toml" 2>/dev/null; then
                root_dir="$probe"
                cd "$root_dir"
                info "Found workspace root at $root_dir"
                break
            fi
            probe="$(dirname "$probe")"
        done
    fi
    cargo build --release
    ok "Build complete ($(du -sh target/release/gyandoot | cut -f1))"
}

install_binary() {
    local root_dir
    root_dir="$(cd "$(dirname "$0")" && pwd)"
    local target_dir="$root_dir/target/release"
    local bin_name="gyandoot"

    if [ ! -f "$target_dir/$bin_name" ]; then
        err "Binary not found at $target_dir/$bin_name"
    fi

    local install_dir="/usr/local/bin"
    if [ ! -w "$install_dir" ]; then
        info "Need sudo to install to $install_dir"
        sudo cp "$target_dir/$bin_name" "$install_dir/$bin_name"
        sudo chmod +x "$install_dir/$bin_name"
    else
        cp "$target_dir/$bin_name" "$install_dir/$bin_name"
        chmod +x "$install_dir/$bin_name"
    fi
    ok "Installed to $install_dir/$bin_name"
}

print_post_install() {
    echo ""
    ok "GyanDoot v2.0 installed successfully!"
    echo ""
    echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
    echo "  Quick Start:"
    echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
    echo "  gyandoot --help         Show all commands"
    echo "  gyandoot init           Create config"
    echo "  gyandoot run            Start interactive agent"
    echo ""
    echo "  Browser Tools (anti-detection browsing):"
    echo "  gyandoot browser health Check camofox status"
    echo "  gyandoot browser search <query>"
    echo "  gyandoot browser browse <url>"
    echo ""
    echo "  Start camofox-browser:"
    echo "  sudo systemctl start camofox-browser"
    echo "  # Or manually: cd ~/camofox-browser && npm start"
    echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
    echo ""
}

main() {
    local os arch
    os=$(detect_os)
    arch=$(detect_architecture)
    info "Detected: $os / $arch"

    install_rust_if_needed
    install_node_if_needed
    install_camofox_browser

    build_release
    install_binary

    # Optional: don't fail if service setup doesn't work
    setup_camofox_service 2>/dev/null || warn "Could not setup camofox service (manual start works)"

    print_post_install
}

main "$@"