#!/usr/bin/env bash
set -e

# Nomarchy Nix State Sync
# Bridges the gap between runtime UI changes (state.json) and declarative
# Nix configuration (nomarchy-state.nix).

STATE_JSON="$HOME/.config/nomarchy/state.json"
NIX_STATE_FILE="/etc/nixos/nomarchy-state.nix"

# If state.json is missing, nothing to sync
if [ ! -f "$STATE_JSON" ]; then
    exit 0
fi

# Determine destination.
# If we are in the repo, we sync to ./nomarchy-state.nix (dev mode).
# Otherwise, we sync to /etc/nixos/nomarchy-state.nix (real install).
if [ -f "flake.nix" ] || [ -d ".git" ]; then
    DEST="./nomarchy-state.nix"
elif [ -w "/etc/nixos" ]; then
    DEST="$NIX_STATE_FILE"
else
    # Nowhere to sync to
    exit 0
fi

# Generate the Nix attribute set from JSON.
# We use jq to extract the keys and format them as Nix assignments.
# Note: font in state.json maps to fonts.monospace in Nix.

{
    echo "# DO NOT EDIT MANUALLY - Managed by Nomarchy scripts."
    echo "# This file mirrors your UI choices (theme, font, etc.) into the declarative"
    echo "# Nix configuration. It is imported by your home.nix."
    echo "{ lib, ... }:"
    echo "{"
    echo "  nomarchy = {"

    # Core UI strings
    echo "    theme = lib.mkDefault \"$(jq -r '.theme // empty' "$STATE_JSON")\";"
    echo "    fonts.monospace = lib.mkDefault \"$(jq -r '.font // empty' "$STATE_JSON")\";"
    echo "    panelPosition = lib.mkDefault \"$(jq -r '.panelPosition // empty' "$STATE_JSON")\";"
    echo "    wallpaper = lib.mkDefault \"$(jq -r '.wallpaper // empty' "$STATE_JSON")\";"

    # Hyprland layout (numbers)
    echo "    hyprland = {"
    echo "      scale = lib.mkDefault \"$(jq -r '.hyprland.scale // "auto"' "$STATE_JSON")\";"
    echo "      gaps_in = lib.mkDefault $(jq -r '.hyprland.gaps_in // 5' "$STATE_JSON");"
    echo "      gaps_out = lib.mkDefault $(jq -r '.hyprland.gaps_out // 10' "$STATE_JSON");"
    echo "      border_size = lib.mkDefault $(jq -r '.hyprland.border_size // 2' "$STATE_JSON");"
    echo "    };"

    # Toggles (booleans)
    echo "    toggles = {"
    echo "      suspend = lib.mkDefault $(jq -r '.suspend // true' "$STATE_JSON");"
    echo "      screensaver = lib.mkDefault $(jq -r '.screensaver // true' "$STATE_JSON");"
    echo "      idle = lib.mkDefault $(jq -r '.idle // true' "$STATE_JSON");"
    echo "      nightlight = lib.mkDefault $(jq -r '.nightlight // false' "$STATE_JSON");"
    echo "      waybar = lib.mkDefault $(jq -r '.waybar // true' "$STATE_JSON");"
    echo "    };"

    echo "  };"
    echo "}"
} > "$DEST.tmp"

# Final atomic move
mv "$DEST.tmp" "$DEST"