#!/usr/bin/env bash
# ── 02-niri.sh ────────────────────────────────────────────────────────────────
# Install Niri — a scrollable-tiling Wayland compositor.
#
# Niri concepts (different from i3):
#   - No workspaces in the traditional sense — windows tile LEFT/RIGHT
#     in an infinite horizontal scroll canvas.
#   - Workspaces are VERTICAL: each column of windows is a workspace.
#   - Overview (Super+O): bird's-eye view of all workspaces.
#   - No fixed workspace count: Workspaces are created/destroyed dynamically
#
# Run: bash 02-niri.sh
# ─────────────────────────────────────────────────────────────────────────────
set -euo pipefail

echo "── 02-niri: installing Niri and Wayland compositor dependencies..."

# ── Niri + XWayland ───────────────────────────────────────────────────────────
# niri: the compositor itself (available in official Arch repos)
# xwayland-satellite: runs XWayland on-demand as a separate process.
sudo pacman -S --needed --noconfirm \
  niri \
  xwayland-satellite

# ── Wayland session support ───────────────────────────────────────────────────
# polkit-kde-agent: Polkit manages system-wide privileges for unprivileged processes.
# qt6-wayland: Qt6 apps run natively on Wayland instead of via XWayland
# brightnessctl: keyboard brightness keys (used in niri keybinds)
# playerctl: media key support (play/pause/next from keyboard)
# swayidle: idle management — lock screen and suspend after inactivity
# swaylock: lock screen
# SwayBG is a simple wallpaper setter
sudo pacman -S --needed --noconfirm \
  polkit-kde-agent \
  qt6-wayland \
  qt5-wayland \
  brightnessctl \
  playerctl \
  swayidle \
  swaylock \
  swaybg

# ── Create config directory ───────────────────────────────────────────────────
# The symlink script (05-symlinks.sh) will populate this with our dotfile.
# We create it now so niri can start even before symlinking.
mkdir -p ~/.config/niri

# ── Wayland session file ──────────────────────────────────────────────────────
# Check if niri installed its own .desktop session file (it should have)
if [[ -f /usr/share/wayland-sessions/niri.desktop ]]; then
  echo "  ✅  Niri session file found at /usr/share/wayland-sessions/niri.desktop"
else
  # Fallback: create it manually so greetd can find the session
  echo "  ⚠️  Creating niri.desktop manually..."
  sudo tee /usr/share/wayland-sessions/niri.desktop > /dev/null << 'SESSION'
[Desktop Entry]
Name=Niri # Displayed in display manager session chooser
Comment=A scrollable-tiling Wayland compositor
Exec=niri-session # The command to launch the compositor session
Type=Application # Marks this as an application entry
SESSION
fi

echo "✅  02-niri: done"
echo "    Next: bash 03-display-manager.sh"

#   Install greetd + tuigreet as the display manager (login screen).
#
#   greetd is a minimal, compositor-agnostic display manager designed for
#   Wayland. It does not carry GTK/Qt dependencies, does not assume a
#   specific desktop, and starts sessions cleanly via PAM.
#
#   Run: bash 03-display-manager.sh
# ─────────────────────────────────────────────────────────────────────────────
set -euo pipefail # Exit on error, undefined vars, pipe failures

echo "── 03-display-manager: installing greetd and tuigreet..."

# ── Disable any existing display manager ──────────────────────────────────────
# Only one display manager can own the login. Disable others first.
for dm in sddm gdm lightdm lxdm; do
  if systemctl is-enabled "$dm" &>/dev/null; then
  # Returns 0 (success) if service is enabled
  # Silenced with &>/dev/null (discards both stdout and stderr)
  # We only care about the exit code
    echo "  ⚠️  Disabling existing display manager: $dm"
    sudo systemctl disable "$dm"
  fi
done

# ── Install ───────────────────────────────────────────────────────────────────
sudo pacman -S --needed --noconfirm greetd greetd-tuigreet
# greetd: The core display manager daemon
# greetd-tuigreet: Terminal UI greeter (separate binary)
# Flags: --needed: Skip packages already installed (idempotent), --noconfirm: Auto-answer yes (for scripting)

# ── greetd config ─────────────────────────────────────────────────────────────
# The config file at /etc/greetd/config.toml tells greetd which greeter to run.
# We write it here; 05-symlinks.sh will later replace it with a symlink to
# dotfiles/myArch/config/greetd/config.toml for version control.
#
# tuigreet flags used:
#   --time          show a clock in the greeter
#   --remember      remember the last username
#   --sessions      path to .desktop session files (greetd finds Niri here)
#   --asterisks     show * characters while typing password (security feedback)
sudo mkdir -p /etc/greetd

# ── Enable greetd ─────────────────────────────────────────────────────────────
# greetd replaces getty on VT1. We enable it as a systemd service.
sudo systemctl enable greetd

echo "✅  03-display-manager: done — greetd enabled, will start on next boot"
echo "    Next: bash 04-noctalia.sh"

[terminal] # Configures the virtual terminal where greetd runs
vt = 1

[default_session] # Defines what to run (greeter) and as which user
command = "tuigreet --time --remember --sessions /usr/share/wayland-sessions --asterisks --greeting 'Welcome back, nmaximo7'"
user = "greeter"
# command: The actual command to execute for the greeter; user: System user that runs the greeter (security isolation)

tuigreet \
  --time \              # Show clock in greeter
  --remember \          # Remember last username (cached in /var/cache/tuigreet)
  --sessions /usr/share/wayland-sessions \  # Where to find .desktop session files
  --asterisks \         # Show * when typing password (privacy vs feedback)
  --greeting 'Welcome back, nmaximo7'  # Custom greeting text

#!/usr/bin/env bash
# ── 04-noctalia.sh ────────────────────────────────────────────────────────────
# Install Noctalia Shell — a Quickshell-based desktop shell for Wayland.
#
# Architecture (as of Noctalia v4.6+):
#   noctalia-qs  = Noctalia's own fork of the Quickshell runtime (AUR)
#   noctalia-shell = the shell config/QML code that runs on noctalia-qs (AUR)
#   noctalia-shell pulls noctalia-qs as a dependency automatically.
#
#   IMPORTANT: noctalia-qs conflicts with quickshell and quickshell-git.
#   Both must be removed before installing. This script handles that.
#
# Start command (in niri config.kdl):
#   spawn-at-startup "noctalia-qs" "-c" "noctalia-shell"
#   NOT "noctalia-shell" directly — the binary is noctalia-qs.
#
# Run: bash 04-noctalia.sh
# ─────────────────────────────────────────────────────────────────────────────
set -euo pipefail

echo "── 04-noctalia: installing Noctalia Shell..."

# ── Conflict resolution ───────────────────────────────────────────────────────
# noctalia-qs conflicts with quickshell and quickshell-git.
# We use paru -R (not pacman -R) because these are AUR packages —
# pacman -R can fail with "target not found" for AUR-installed packages
# even when pacman -Qi shows them as installed.
# --noconfirm + --nodeps removes them without asking about dependents.
for pkg in quickshell quickshell-git; do
  if paru -Qi "$pkg" &>/dev/null 2>&1; then
    # The script attempts three removal methods
    echo "  ⚠️  Removing conflicting package: $pkg"
    # Method 1: paru -R (preferred for AUR packages)
    paru -R --noconfirm --nodeps "$pkg" 2>/dev/null || \
      # Method 2: sudo pacman -R (fallback for official packages)
      sudo pacman -R --noconfirm --nodeps "$pkg" 2>/dev/null || \
      # Method 3: Manual instruction if both fail
      echo "  ℹ️  Could not remove $pkg automatically — remove manually if install fails"
  else
    echo "  ✅  $pkg not installed, no conflict"
  fi
done

# ── Install from AUR ──────────────────────────────────────────────────────────
# noctalia-shell pulls noctalia-qs as a dependency.
# noctalia-qs builds from source — 10-30 min on first install.
# Subsequent updates use the build cache and are much faster.
echo "  ⏳  Building noctalia-shell from AUR (may take 10-30 minutes)..."
paru -S --needed --noconfirm noctalia-shell

# ── Config directory ──────────────────────────────────────────────────────────
# ~/.config/noctalia/ is where Noctalia reads settings.json.
# 05-symlinks.sh will symlink dotfiles/myArch/config/noctalia/settings.json here.
mkdir -p ~/.config/noctalia

# ── Verify installation ───────────────────────────────────────────────────────
# The binary installed by noctalia-qs is `noctalia-qs` (not `noctalia-shell`).
# noctalia-shell is the config name passed with -c, not an executable.
echo
if command -v noctalia-qs &>/dev/null; then
  echo "  ✅  noctalia-qs binary found: $(which noctalia-qs)"
  echo "  ℹ️   Start with: noctalia-qs -c noctalia-shell"
  echo "  ℹ️   In niri config.kdl use: spawn-at-startup \"noctalia-qs\" \"-c\" \"noctalia-shell\""
else
  echo "  ⚠️  noctalia-qs not found in PATH — check paru output above"
fi

echo
echo "✅  04-noctalia: done"
echo "    Next: bash 05-symlinks.sh"