#!/usr/bin/env bash

# Droidnix: Complete Emacs setup for Nix/Org tangling, HTML export, and a great editing experience
# Installs packages in batch mode and configures them for interactive use.

set -euo pipefail

# Install Emacs (if not already installed)
if ! command -v emacs &> /dev/null; then
    echo "Emacs not found. Installing Emacs..."
    sudo apt-get update
    sudo apt-get install -y emacs
fi

# Create a minimal Emacs config for package installation
TEMP_CONFIG=$(mktemp /tmp/droidnix-emacs-setup.XXXXXX.el)
cat > "$TEMP_CONFIG" << 'EOF'
;; Minimal config for installing packages
(require 'package)
(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/") t)
(package-initialize)
EOF

# Install packages in batch mode
emacs --batch \
     --load "$TEMP_CONFIG" \
     --eval "(package-refresh-contents)" \
     --eval "(package-install 'use-package)" \
     --eval "(package-install 'org)" \
     --eval "(package-install 'nix-mode)" \
     --eval "(package-install 'htmlize)" \
     --eval "(package-install 'catppuccin-theme)" \
     --eval "(package-install 'org-bullets)" \
     --eval "(package-install 'magit)" \
     --eval "(package-install 'company)" \
     --eval "(package-install 'flycheck)" \
     --eval "(package-install 'doom-modeline)" \
     --eval "(package-install 'which-key)" \
     --eval "(package-install 'projectile)" \
     --eval "(package-install 'ivy)" \
     --eval "(package-install 'counsel)" \
     --eval "(package-install 'all-the-icons)" \
     --eval "(package-install 'doom-themes)" \
     --eval "(package-install 'treemacs)" \
     --eval "(package-install 'lsp-mode)" \
     --eval "(package-install 'nix-mode)" \
     --eval "(package-install 'emacs-dashboard)"

# Create a post-install config for interactive use
USER_EMACSCONFIG="${HOME}/.emacs.d/init.el"
if [ ! -f "$USER_EMACSCONFIG" ]; then
    mkdir -p "${HOME}/.emacs.d"
    cat > "$USER_EMACSCONFIG" << 'EOF'
;; Droidnix Emacs Configuration
(require 'package)
(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/") t)
(package-initialize)

;; Enable Catppuccin Mocha theme
(when (fboundp 'load-theme)
  (ignore-errors
    (load-theme 'catppuccin-mocha t)
    (setq catppuccin-disable-term-colors nil)
    (setq catppuccin-enable-bold t)
    (setq catppuccin-enable-italic t)))

;; Enable Doom Modeline
(when (fboundp 'doom-modeline-mode)
  (doom-modeline-mode 1))

;; Enable All The Icons
(when (fboundp 'all-the-icons-install-fonts)
  (all-the-icons-install-fonts)
  (global-all-the-icons-mode))

;; Enable Treemacs
(when (fboundp 'treemacs)
  (treemacs-mode))

;; Enable Company for autocomplete
(when (fboundp 'company-mode)
  (global-company-mode))

;; Enable Flycheck for syntax checking
(when (fboundp 'flycheck-mode)
  (global-flycheck-mode))

;; Enable Ivy + Counsel for better completion
(when (fboundp 'ivy-mode)
  (ivy-mode 1)
  (setq ivy-use-virtual-buffers t)
  (when (fboundp 'counsel-mode)
    (counsel-mode 1)))

;; Enable Projectile for project management
(when (fboundp 'projectile-mode)
  (projectile-mode +1)
  (define-key projectile-mode-map (kbd "C-c p") 'projectile-command-map))

;; Enable Which Key for keybindings help
(when (fboundp 'which-key-mode)
  (which-key-mode 1))

;; Enable Org Babel for Nix
(require 'org)
(org-babel-do-load-languages
 'org-babel-load-languages
 '((emacs-lisp . t)
   (nix . t)
   (shell . t)))
(setq org-babel-tangle-lang-exts '(("nix" . "nix")))

;; Enable Org Bullets for better lists
(when (fboundp 'org-bullets-mode)
  (add-hook 'org-mode-hook (lambda () (org-bullets-mode 1))))

;; Enable Magit for Git
(when (fboundp 'magit-version)
  (setq magit-display-buffer-function 'magit-display-buffer-fullscreen))

;; Enable LSP Mode for language server support
(when (fboundp 'lsp-mode)
  (lsp-mode 1)
  (setq lsp-keymap-prefix "C-c l"))

;; Enable Dashboard
(when (fboundp 'dashboard-refresh-buffer)
  (dashboard-mode 1))

;; Enable Nix Mode
(when (fboundp 'nix-mode)
  (setq auto-mode-alist (cons '("\\.nix\\'" . nix-mode) auto-mode-alist)))

;; Custom keybindings
(global-set-key (kbd "C-c t") 'treemacs)
(global-set-key (kbd "C-c p") 'projectile-command-map)
(global-set-key (kbd "C-c g") 'magit-status)
(global-set-key (kbd "C-c d") 'dashboard-refresh-buffer)
EOF
fi

# Clean up
rm "$TEMP_CONFIG"

echo "Emacs setup complete with Catppuccin Mocha and all plugins!"
echo "Installed packages:"
echo "  - Catppuccin Mocha (theme)"
echo "  - Org mode + Org Bullets"
echo "  - Magit (Git interface)"
echo "  - Company (autocomplete)"
echo "  - Flycheck (syntax checking)"
echo "  - Doom Modeline (status bar)"
echo "  - Which Key (keybindings help)"
echo "  - Projectile (project management)"
echo "  - Ivy + Counsel (completion framework)"
echo "  - All The Icons (pretty icons)"
echo "  - Treemacs (file tree)"
echo "  - LSP Mode (language server)"
echo "  - Emacs Dashboard (start page)"
echo ""
echo "You can now:"
echo "1. Tangle Org files: emacs README.org --batch -f org-babel-tangle"
echo "2. Export to HTML:   emacs -Q --batch --eval '(setq org-html-htmlize-output-type nil)' README.org -f org-html-export-to-html"
echo "3. Open Emacs interactively for the full experience with all plugins"
echo "After this, use the Emacs config in ./assets/common/emacs.nix for future setups."