#!/bin/bash
# Dependencies module for Transmission RSS Manager Installation

function install_dependencies() {
  log "INFO" "Installing dependencies..."

  # Check for package manager
  if command -v apt-get &> /dev/null; then
    # Update package index
    apt-get update

    # Install Node.js and npm if not already installed
    if ! command_exists node; then
      log "INFO" "Installing Node.js and npm..."
      apt-get install -y ca-certificates curl gnupg
      mkdir -p /etc/apt/keyrings
      
      # Check if download succeeds
      if ! curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg; then
        log "ERROR" "Failed to download Node.js GPG key"
        exit 1
      fi
      
      echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_18.x nodistro main" > /etc/apt/sources.list.d/nodesource.list
      
      # Update again after adding repo
      apt-get update
      
      # Install nodejs
      if ! apt-get install -y nodejs; then
        log "ERROR" "Failed to install Node.js"
        exit 1
      fi
    else
      log "INFO" "Node.js is already installed."
    fi

    # Install additional dependencies
    log "INFO" "Installing additional dependencies..."
    apt-get install -y unrar unzip p7zip-full nginx
  else
    log "ERROR" "This installer requires apt-get package manager"
    log "INFO" "Please install the following dependencies manually:"
    log "INFO" "- Node.js (v18.x)"
    log "INFO" "- npm"
    log "INFO" "- unrar"
    log "INFO" "- unzip"
    log "INFO" "- p7zip-full"
    log "INFO" "- nginx"
    exit 1
  fi

  # Check if all dependencies were installed successfully
  local dependencies=("node" "npm" "unrar" "unzip" "7z" "nginx")
  local missing_deps=()
  
  for dep in "${dependencies[@]}"; do
    if ! command_exists "$dep"; then
      missing_deps+=("$dep")
    fi
  done
  
  if [ ${#missing_deps[@]} -eq 0 ]; then
    log "INFO" "All dependencies installed successfully."
  else
    log "ERROR" "Failed to install some dependencies: ${missing_deps[*]}"
    log "WARN" "Please install them manually and rerun this script."
    
    # More helpful information based on which deps are missing
    if [[ " ${missing_deps[*]} " =~ " node " ]]; then
      log "INFO" "To install Node.js manually, visit: https://nodejs.org/en/download/"
    fi
    
    if [[ " ${missing_deps[*]} " =~ " nginx " ]]; then
      log "INFO" "To install nginx manually: sudo apt-get install nginx"
    fi
    
    exit 1
  fi
}

function create_directories() {
  log "INFO" "Creating installation directories..."
  
  # Check if INSTALL_DIR is defined
  if [ -z "$INSTALL_DIR" ]; then
    log "ERROR" "INSTALL_DIR is not defined"
    exit 1
  fi
  
  # Create directories and check for errors
  DIRECTORIES=(
    "$INSTALL_DIR"
    "$INSTALL_DIR/logs"
    "$INSTALL_DIR/public/js"
    "$INSTALL_DIR/public/css"
    "$INSTALL_DIR/modules"
    "$INSTALL_DIR/data"
  )
  
  for dir in "${DIRECTORIES[@]}"; do
    if ! mkdir -p "$dir"; then
      log "ERROR" "Failed to create directory: $dir"
      exit 1
    fi
  done
  
  log "INFO" "Directories created successfully."
}