#!/usr/bin/env bash
# Package manager abstraction functions

# Source common utilities if not already sourced
if [ -z "$OS_TYPE" ]; then
    SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
    source "$SCRIPT_DIR/common.sh"
fi

# Update package manager cache
update_package_cache() {
    log_info "Updating package cache"

    case "$OS_TYPE" in
        macos)
            if command_exists brew; then
                brew update
            else
                log_error "Homebrew not installed"
                return 1
            fi
            ;;
        debian)
            maybe_sudo apt-get update -qq
            ;;
        arch)
            maybe_sudo pacman -Sy --noconfirm
            ;;
        *)
            log_error "Unsupported OS: $OS_TYPE"
            return 1
            ;;
    esac
}

# Install a package using the appropriate package manager
install_package() {
    local package="$1"
    local package_debian="${2:-$package}"
    local package_arch="${3:-$package}"

    log_info "Installing package: $package"

    case "$OS_TYPE" in
        macos)
            if ! command_exists brew; then
                log_error "Homebrew not installed. Run system/macos-setup.sh first"
                return 1
            fi
            brew install "$package"
            ;;
        debian)
            maybe_sudo apt-get install -y -qq "$package_debian"
            ;;
        arch)
            maybe_sudo pacman -S --noconfirm --needed "$package_arch"
            ;;
        *)
            log_error "Unsupported OS: $OS_TYPE"
            return 1
            ;;
    esac
}

# Install a cask (macOS only)
install_cask() {
    local cask="$1"

    if ! is_macos; then
        log_warn "Cask installation only supported on macOS"
        return 1
    fi

    log_info "Installing cask: $cask"

    if ! command_exists brew; then
        log_error "Homebrew not installed. Run system/macos-setup.sh first"
        return 1
    fi

    brew install --cask "$cask"
}

# Install from AUR (Arch only)
install_aur() {
    local package="$1"

    if ! is_arch; then
        log_warn "AUR installation only supported on Arch Linux"
        return 1
    fi

    log_info "Installing AUR package: $package"

    # Check for yay first, then paru
    if command_exists yay; then
        yay -S --noconfirm --needed "$package"
    elif command_exists paru; then
        paru -S --noconfirm --needed "$package"
    else
        log_error "No AUR helper found. Install yay or paru first"
        return 1
    fi
}

# Install cargo package
install_cargo() {
    local package="$1"

    if ! command_exists cargo; then
        log_info "Installing Rust toolchain"
        install_package rustup rustup cargo

        if is_debian || is_arch; then
            rustup default stable
        fi
    fi

    log_info "Installing cargo package: $package"
    cargo install "$package"
}

# Install Python package with pip
install_pip() {
    local package="$1"

    if ! command_exists pip3; then
        log_info "Installing pip"
        install_package python3-pip python3-pip python-pip
    fi

    log_info "Installing pip package: $package"
    pip3 install --user "$package"
}

# Install npm package globally
install_npm() {
    local package="$1"

    if ! command_exists npm; then
        log_error "npm not installed. Install Node.js first"
        return 1
    fi

    log_info "Installing npm package: $package"
    npm install -g "$package"
}

# Check if package is installed
package_installed() {
    local package="$1"

    case "$OS_TYPE" in
        macos)
            brew list "$package" >/dev/null 2>&1
            ;;
        debian)
            dpkg -l "$package" 2>/dev/null | grep -q "^ii"
            ;;
        arch)
            pacman -Q "$package" >/dev/null 2>&1
            ;;
        *)
            return 1
            ;;
    esac
}

# Ensure Homebrew is installed (macOS only)
ensure_homebrew() {
    if ! is_macos; then
        return 0
    fi

    if command_exists brew; then
        log_success "Homebrew already installed"
        return 0
    fi

    log_info "Installing Homebrew"
    /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

    # Add Homebrew to PATH for Apple Silicon Macs
    if [ -f "/opt/homebrew/bin/brew" ]; then
        eval "$(/opt/homebrew/bin/brew shellenv)"
    fi
}

# Ensure AUR helper is installed (Arch only)
ensure_aur_helper() {
    if ! is_arch; then
        return 0
    fi

    if command_exists yay || command_exists paru; then
        log_success "AUR helper already installed"
        return 0
    fi

    log_info "Installing yay AUR helper"

    # Install dependencies
    maybe_sudo pacman -S --noconfirm --needed git base-devel

    # Clone and build yay
    local temp_dir=$(mktemp -d)
    git clone https://aur.archlinux.org/yay.git "$temp_dir/yay"
    cd "$temp_dir/yay"
    makepkg -si --noconfirm
    cd -
    rm -rf "$temp_dir"

    log_success "yay installed"
}

# Install a .deb package from a URL
# Usage: install_deb_from_url <url>
install_deb_from_url() {
    local url="$1"

    if ! is_debian; then
        log_error "This function is only for Debian-based systems"
        return 1
    fi

    log_info "Downloading and installing .deb from: $url"

    local temp_dir=$(mktemp -d)
    local deb_file="$temp_dir/package.deb"

    if ! wget -q "$url" -O "$deb_file"; then
        log_error "Failed to download .deb package from $url"
        rm -rf "$temp_dir"
        return 1
    fi

    maybe_sudo dpkg -i "$deb_file"
    maybe_sudo apt-get install -f -y

    rm -rf "$temp_dir"
    log_success "Package installed successfully"
}

# Fetch latest GitHub release download URL for a specific pattern
# Usage: get_latest_github_release_url <owner/repo> <pattern>
# Example: get_latest_github_release_url "obsidianmd/obsidian-releases" "_amd64.deb$"
get_latest_github_release_url() {
    local repo="$1"
    local pattern="$2"

    local api_url="https://api.github.com/repos/$repo/releases/latest"
    local download_url=$(curl -s "$api_url" | grep -o "https://.*$pattern" | head -n1)

    if [ -z "$download_url" ]; then
        log_error "Could not find release matching pattern: $pattern"
        return 1
    fi

    echo "$download_url"
}