#!/bin/bash

# Get the current git config list
gc_ls="$(git config --list)"

# ANSI color codes
RED='\033[0;31m'
CYAN='\033[0;36m'
YELLOW='\033[0;33m'
GREEN='\033[0;32m'
BLUE='\033[0;34m'
LIGHT_GREEN='\033[0;92m'
BOLD='\033[1m'
NC='\033[0m' # No Color

echo_error() {
  printf "${BOLD}${RED}ERROR: ${NC}${RED}%s${NC}\n" "$1" >&2
}

echo_warning() {
  printf "${BOLD}${YELLOW}WARNING: ${NC}${YELLOW}%s${NC}\n" "$1"
}

echo_gls() {
  printf "${BOLD}${YELLOW}%s${NC}\n" "$1"
}

echo_note() {
  printf "${BOLD}${LIGHT_GREEN}NOTE: ${NC}${LIGHT_GREEN}%s${NC}\n" "$1"
}

# Function to print colored text
print_color() {
  printf "%b%s%b\n" "$1" "$2" "$NC"
}

# Check if the given command exists silently
command_exists() {
  command -v "$@" >/dev/null 2>&1
}

# Function to install a package if `curl` is available
if command_exists curl; then
  install_pkg() {
    sh -c "$(curl -sSL https://git.k4li.de/pika/scripts/raw/branch/main/bash/snippets/install_pkg.sh)" -- "$@"
  }
else
  echo_error "curl is not installed, universal install disabled!"
fi

# Function for barebones Git setup
gitBareBonesSetup() {
  echo_gls "Please enter your username: "
  read -r g_username
  echo_gls "Please enter your email: "
  read -r g_mail
  echo_gls "Please enter your default branch name <e.g. main>"
  read -r g_branch
  git config --global user.name "$g_username"
  git config --global user.email "$g_mail"
  git config --global init.defaultBranch "$g_branch"
  echo_note "Barebones Git setup complete!"
  read </dev/tty
}

# Function for extended Git configuration
gitExtendedSetup() {
  echo_gls "Please enter the default branch name (e.g., main): "
  read -r g_branch
  echo_gls "Please enter your preferred text editor (e.g., vim, nano, code): "
  read -r g_editor

  # Set default branch name
  git config --global init.defaultBranch "$g_branch"

  # Set preferred text editor
  git config --global core.editor "$g_editor"

  # Set some common aliases
  git config --global alias.co "checkout"
  git config --global alias.br "branch"
  git config --global alias.ci "commit"
  git config --global alias.st "status"

  # Set default push behavior to simple (to avoid issues with push)
  git config --global push.default simple

  # Enable credential caching for 15 minutes (900 seconds)
  git config --global credential.helper "cache --timeout=900"

  # Add a global .gitignore file (optional)
  echo_gls "Do you have a global .gitignore file? If so, please provide the path (or leave blank to skip): "
  read -r g_gitignore
  if [ -n "$g_gitignore" ] && [ -f "$g_gitignore" ]; then
    git config --global core.excludesfile "$g_gitignore"
    echo_note "Global .gitignore file set to $g_gitignore"
  else
    echo_warning "Skipping global .gitignore configuration!"
  fi

  echo_note "Extended Git setup complete!"
  read </dev/tty
}

gitChangeMail() {
  echo_gls "Please enter the new e-Mail: "
  read -e -r new_mail
  git config --global user.email "$new_mail"
  echo_note "Email updated to $new_mail"
  read </dev/tty
}

gitChangeUsername() {
  currentName="$(git config --get user.name)"
  echo_warning "Do you really want to change your username? (current username is $currentName) (y/N): "
  read -e -r confirm
  if [[ "$currentName" -eq ^"yY" ]]; then
    echo_gls "Please enter the new Username: "
    read -r new_username
    git config --global user.name "$new_username"
    echo_note "Username updated to $new_username"
    read </dev/tty
  fi
}

gitCredentialsAddAuthToken() {
  local CREDENTIALS_FILE="$HOME/.git-credentials"
  echo_gls "Enter the domain/server (e.g. git.k4li.de):"
  read -r g_domain

  echo_gls "Enter your username:"
  read -r g_user

  echo_gls "Enter your authentication token:"
  read -r g_token # The '-s' flag hides input for privacy

  # Append the new credentials to the file
  echo "https://$g_user:$g_token@$g_domain" >>"$CREDENTIALS_FILE"

  echo "Credentials added for $g_domain in $CREDENTIALS_FILE"

  git config --global credential.helper store

  chmod 600 "$HOME/.git-credentials"

  read </dev/tty
}

# Display the current Git configuration
showGitConfig() {
  echo_gls "This is your current git-config:"
  echo_gls "─────────────────────────────────────────────────"

  # Loop through each line of the git config list and format it nicely
  printf "%s\n" "$gc_ls" | while IFS='=' read -r key value; do
    # Extract section/category name (before the first period)
    category="${key%%.*}"
    # Extract setting name (after the first period)
    setting="${key#*.}"

    # Use different colors and styles for category and setting names
    printf "${BOLD}${CYAN}%-20s${NC}: ${LIGHT_GREEN}%-30s${NC} ${YELLOW}%s${NC}\n" "$category" "$setting" "$value"
  done

  echo_gls "─────────────────────────────────────────────────"

  read </dev/tty
}

# Main menu loop
main_menu() {
  local selected=0
  local key=""

  while true; do
    display_menu

    # Read a single character
    read -rsn1 key

    case $key in
    A | k) # Up arrow or k
      ((selected--))
      if [[ $selected -lt 0 ]]; then
        selected=$((${#options[@]} - 1))
      fi
      ;;
    B | j) # Down arrow or j
      ((selected++))
      if [[ $selected -ge ${#options[@]} ]]; then
        selected=0
      fi
      ;;
    q) # q for quit
      exit 0
      ;;
    "") # Enter key
      case $selected in
      0) gitBareBonesSetup ;;
      1) gitExtendedSetup ;;
      2) gitChangeMail ;;
      3) gitChangeUsername ;;
      4) gitCredentialsAddAuthToken ;;
      5) showGitConfig ;;
      6) exit 0 ;;
      esac
      ;;
    esac
  done
}

# Menu options
declare -a options=(
  "BareBones setup"
  "Extended setup"
  "Change e-Mail"
  "Change username"
  "Activate git-credentials and add Authentication token for any git server"
  "Show the current git config"
  "Exit"
)

# Function to display the menu
display_menu() {
  clear
  print_color "$BLUE" "=== Git setup tui ==="
  echo_note "(navigate with j/k or up/down arrows - q to quit)"
  for i in "${!options[@]}"; do
    if [[ $i -eq $selected ]]; then
      print_color "$GREEN" "> ${options[$i]}"
    else
      echo "  ${options[$i]}"
    fi
  done
}

# Main function
main() {
  if command_exists git; then
    main_menu </dev/tty
  else
    install_pkg git && main
  fi
}

main