#!/bin/bash
# pm_base.sh - Base package manager interface for USM installer

# Common dependencies required by USM and its components
# These are package names that should be common across package managers
declare -A COMMON_DEPS=(
    ["vala"]="vala"
    ["meson"]="meson"
    ["ninja"]="ninja-build"
    ["git"]="git"
    ["pkgconfig"]="pkg-config"
    ["gcc"]="gcc"
    ["glib"]="glib2"
)

# Base function to check if a package is installed
# Must be overridden by package manager implementation
pm_is_installed() {
    log_error "pm_is_installed not implemented"
    return 1
}

# Base function to install packages
# Must be overridden by package manager implementation
pm_install() {
    log_error "pm_install not implemented"
    return 1
}

# Base function to update package cache
# Must be overridden by package manager implementation
pm_update() {
    log_error "pm_update not implemented"
    return 1
}

# Base function to get package names for dependencies
# Must be overridden by package manager implementation
pm_get_package_name() {
    log_error "pm_get_package_name not implemented"
    echo ""
}

# Install all missing dependencies
install_missing_deps() {
    local missing=$(get_missing_deps)
    
    if [[ -z "$missing" ]]; then
        log_info "All dependencies are already installed"
        return 0
    fi
    
    log_step "Installing missing dependencies: ${missing}"
    
    if ! pm_update; then
        log_warn "Failed to update package cache, continuing anyway..."
    fi
    
    if ! pm_install $missing; then
        log_error "Failed to install dependencies"
        return 1
    fi
    
    log_info "Dependencies installed successfully"
    return 0
}

# Count missing dependencies
count_missing_deps() {
    local missing=$(get_missing_deps)
    if [[ -z "$missing" ]]; then
        echo 0
    else
        echo $(echo "$missing" | wc -w)
    fi
}