#!/usr/bin/env bash
set -Eeuo pipefail

# Configuration Script for Fedora Hyprland Installer

echo "=== Configuring Hyprland Desktop Environment ==="

HYPR_DIR="${HOME}/.config/hypr"
HYPR_CONF="${HYPR_DIR}/hyprland.conf"

mkdir -p "${HYPR_DIR}"

# 1. Detect Terminal — find which terminal is actually available
TERMINAL_BIN=""
if command -v kitty &>/dev/null; then
    TERMINAL_BIN="kitty"
elif command -v alacritty &>/dev/null; then
    TERMINAL_BIN="alacritty"
elif command -v foot &>/dev/null; then
    TERMINAL_BIN="foot"
elif command -v gnome-terminal &>/dev/null; then
    TERMINAL_BIN="gnome-terminal"
fi

if [ -z "$TERMINAL_BIN" ]; then
    echo "[!] Warning: No supported terminal emulator detected. Defaulting to kitty."
    TERMINAL_BIN="kitty"
fi

# 2. Detect Launcher
LAUNCHER_BIN=""
if command -v wofi &>/dev/null; then
    LAUNCHER_BIN="wofi --show drun"
elif command -v rofi &>/dev/null; then
    LAUNCHER_BIN="rofi -show drun"
fi

if [ -z "$LAUNCHER_BIN" ]; then
    echo "[!] Warning: No supported application launcher detected. Defaulting to wofi."
    LAUNCHER_BIN="wofi --show drun"
fi

# 3. Detect GPU Environment Variables
GPU_CONFIG=""
if command -v lspci &>/dev/null && lspci -nnk 2>/dev/null | grep -iq "nvidia"; then
    echo "[i] NVIDIA GPU detected. Adding conservative NVIDIA compatibility settings."
    GPU_CONFIG=$(cat <<'ENVEOF'

# NVIDIA compatibility
env = LIBVA_DRIVER_NAME,nvidia
env = GBM_BACKEND,nvidia-drm
env = __GLX_VENDOR_LIBRARY_NAME,nvidia
env = NVD_BACKEND,direct
cursor {
    no_hardware_cursors = true
}
ENVEOF
)
fi

# 4. Generate hyprland.conf if missing
if [ ! -f "${HYPR_CONF}" ]; then
    echo "[+] Creating clean ${HYPR_CONF}"
    cat <<EOF > "${HYPR_CONF}"
# Fedora Hyprland Default Configuration
# Generated by hyprfedora — Antigravity Fedora Hyprland Installer Skill

# Monitor setup (auto detect resolution & position)
monitor=,preferred,auto,1

# Input config
input {
    kb_layout = us
    follow_mouse = 1
    touchpad {
        natural_scroll = true
    }
}

general {
    gaps_in = 5
    gaps_out = 10
    border_size = 2
    col.active_border = rgba(33ccffee) rgba(00ff99ee) 45deg
    col.inactive_border = rgba(595959aa)
    layout = dwindle
}

decoration {
    rounding = 8
    blur {
        enabled = true
        size = 3
        passes = 1
    }
}

animations {
    enabled = true
    bezier = myBezier, 0.05, 0.9, 0.1, 1.05
    animation = windows, 1, 5, myBezier
    animation = windowsOut, 1, 5, default, popin 80%
    animation = border, 1, 10, default
    animation = fade, 1, 5, default
    animation = workspaces, 1, 5, default
}

dwindle {
    pseudotile = true
    preserve_split = true
}

# Autostart essential services
exec-once = dbus-update-activation-environment --systemd WAYLAND_DISPLAY XDG_CURRENT_DESKTOP
exec-once = /usr/libexec/polkit-gnome-authentication-agent-1
exec-once = waybar
exec-once = dunst
exec-once = swaybg -c '#1e1e2e'
${GPU_CONFIG}

# Keybindings
\$mainMod = SUPER

bind = \$mainMod, RETURN, exec, ${TERMINAL_BIN}
bind = \$mainMod, SPACE, exec, ${LAUNCHER_BIN}
bind = \$mainMod, Q, killactive,
bind = \$mainMod, M, exit,
bind = \$mainMod, E, exec, nautilus || thunar || pcmanfm
bind = \$mainMod, V, togglefloating,
bind = \$mainMod, R, exec, hyprctl reload
bind = \$mainMod, P, pseudo, # dwindle
bind = \$mainMod, J, togglesplit, # dwindle

# Move focus
bind = \$mainMod, left, movefocus, l
bind = \$mainMod, right, movefocus, r
bind = \$mainMod, up, movefocus, u
bind = \$mainMod, down, movefocus, d

# Switch workspaces
bind = \$mainMod, 1, workspace, 1
bind = \$mainMod, 2, workspace, 2
bind = \$mainMod, 3, workspace, 3
bind = \$mainMod, 4, workspace, 4
bind = \$mainMod, 5, workspace, 5
bind = \$mainMod, 6, workspace, 6
bind = \$mainMod, 7, workspace, 7
bind = \$mainMod, 8, workspace, 8
bind = \$mainMod, 9, workspace, 9
bind = \$mainMod, 0, workspace, 10

# Screenshots
bind = , Print, exec, grim -g "\$(slurp)" - | wl-copy
EOF
    echo "[✓] Configuration generated successfully."
else
    echo "[i] ${HYPR_CONF} already exists. Skipping default creation to preserve user edits."
fi