#!/bin/bash
# Git + SSH onboarding script for developer environments.
# Prompts for missing git config, sets recommended options, and helps create and test SSH keys.
# Author: [ilia] | Created: [Aug 28, 2025]

set -euo pipefail  # Exit on error, unset vars, and in pipe failures

## FUNCTIONS

# Prompt for and set global git config if missing
set_git_config() {
  local key="$1"
  local prompt="$2"
  if ! git config --get "user.${key}" &>/dev/null; then
    read -rp "$prompt" value
    git config --global "user.${key}" "$value"
  fi
}

# Create ed25519 SSH key if missing
setup_ssh_key() {
  if [ ! -f ~/.ssh/id_ed25519 ]; then
    read -rp "No ed25519 SSH key found! Create one for Git usage? (y/n): " sshyn
    if [[ "$sshyn" =~ ^[Yy]$ ]]; then
      ssh-keygen -t ed25519 -C "$(git config --get user.email)"
    fi
  fi
}

# Show public SSH key and copy to clipboard
show_and_copy_ssh_key() {
  if [ -f ~/.ssh/id_ed25519.pub ]; then
    echo "Your public ed25519 SSH key:"
    cat ~/.ssh/id_ed25519.pub
    if command -v xclip &>/dev/null; then
      xclip -sel clip < ~/.ssh/id_ed25519.pub
      echo "Public key copied to clipboard."
    fi
    echo "Add this key to Gitea: http://10.0.30.169:3000/user/settings/keys"
  else
    echo "No public ed25519 SSH key found. You might need to generate it."
  fi
}

# SSH connection test
test_ssh_connection() {
  read -rp "Test SSH connection to Gitea server? (y/n): " testssh
  if [[ "$testssh" =~ ^[Yy]$ ]]; then
    ssh -T gitvm@10.0.30.169
  fi
}

# Environment verification function
verify_environment() {
  echo
  echo "=== Environment Verification ==="
  echo
  
  # Check key development tools
  echo "🛠️  Development Tools:"
  command -v node >/dev/null && echo "  ✓ Node.js: $(node --version)" || echo "  ✗ Node.js: Not found"
  command -v python3 >/dev/null && echo "  ✓ Python3: $(python3 --version)" || echo "  ✗ Python3: Not found"
  command -v docker >/dev/null && echo "  ✓ Docker: $(docker --version)" || echo "  ✗ Docker: Not found"
  command -v code >/dev/null && echo "  ✓ VS Code: $(code --version | head -n1)" || echo "  ✗ VS Code: Not found"
  
  echo
  echo "🐚 Shell Environment:"
  echo "  ✓ Current shell: $SHELL"
  command -v zsh >/dev/null && echo "  ✓ Zsh: $(zsh --version)" || echo "  ✗ Zsh: Not found"
  command -v tmux >/dev/null && echo "  ✓ Tmux: $(tmux -V)" || echo "  ✗ Tmux: Not found"
  command -v fzf >/dev/null && echo "  ✓ Fzf: $(fzf --version)" || echo "  ✗ Fzf: Not found"
  
  echo
  echo "📊 Monitoring Tools:"
  command -v htop >/dev/null && echo "  ✓ htop: Available" || echo "  ✗ htop: Not found"
  command -v btop >/dev/null && echo "  ✓ btop: Available" || echo "  ✗ btop: Not found"
  command -v bandwhich >/dev/null && echo "  ✓ bandwhich: Available" || echo "  ✗ bandwhich: Not found"
  
  echo
  echo "🔒 Security & VPN:"
  command -v ufw >/dev/null && echo "  ✓ UFW: $(ufw --version | head -n1)" || echo "  ✗ UFW: Not found"
  systemctl is-active fail2ban >/dev/null 2>&1 && echo "  ✓ fail2ban: Active" || echo "  ✗ fail2ban: Not active"
  command -v tailscale >/dev/null && echo "  ✓ Tailscale: $(tailscale version --short)" || echo "  ✗ Tailscale: Not found"
  
  echo
  echo "💾 Backup Tools:"
  command -v rsync >/dev/null && echo "  ✓ rsync: $(rsync --version | head -n1)" || echo "  ✗ rsync: Not found"
  command -v borgbackup >/dev/null && echo "  ✓ borgbackup: Available" || echo "  ✗ borgbackup: Not found"
  command -v rclone >/dev/null && echo "  ✓ rclone: Available" || echo "  ✗ rclone: Not found"
  
  echo
  echo "🔧 System Tools:"
  command -v jq >/dev/null && echo "  ✓ jq: $(jq --version)" || echo "  ✗ jq: Not found"
  command -v ripgrep >/dev/null && echo "  ✓ ripgrep: $(rg --version | head -n1)" || echo "  ✗ ripgrep: Not found"
  command -v fd >/dev/null && echo "  ✓ fd-find: Available" || echo "  ✗ fd-find: Not found"
  
  echo
  echo "For a complete list of installed applications, see applications.md"
}

## MAIN LOGIC

echo "Checking Git global config..."
set_git_config "name" "Enter your Git user name: "
set_git_config "email" "Enter your Git email: "

# Set best-practice Git global defaults
git config --global credential.helper cache
git config --global color.ui auto

echo
echo "Current global Git configuration:"
git config --global --list

setup_ssh_key
show_and_copy_ssh_key
test_ssh_connection

# Ask if user wants to verify environment
echo
read -rp "Would you like to verify your development environment? (y/n): " verify
if [[ "$verify" =~ ^[Yy]$ ]]; then
  verify_environment
fi

echo
echo "Git/SSH setup complete!"
echo "📋 See applications.md for the complete list of 60+ installed applications"
echo "🔧 Run individual commands from the verification section to check specific tools"