# Shared display recovery helpers (#127). Used by hyprland.nix (PATH +
# undock dump) and idle.nix (hypridle on-resume / after_sleep absolute paths).
#
# dump  — evidence to ~/nomarchy-display-dump-*.txt without SSH
# wake  — dpms on + zero-output undock rescue + dump if still dark
# Pass displayTransition so wake pins the same binary hyprland ships.
# Call once with only pkgs to get dump (transition not ready yet), then
# again with displayTransition for wake.
{ pkgs, displayTransition ? null }:

let
  dump = pkgs.writeShellScriptBin "nomarchy-display-dump" ''
    set -u
    reason="''${1:-manual}"
    stamp=$(date +%Y%m%d-%H%M%S)
    out="''${HOME:-/tmp}/nomarchy-display-dump-''${stamp}.txt"
    {
      echo "=== nomarchy-display-dump reason=$reason ==="
      echo "date: $(date -Is 2>/dev/null || date)"
      echo "user: $(id -un 2>/dev/null || echo ?)"
      echo "HYPRLAND_INSTANCE_SIGNATURE=''${HYPRLAND_INSTANCE_SIGNATURE:-}"
      echo
      echo "=== hyprctl monitors (enabled) ==="
      hyprctl monitors -j 2>&1 || true
      echo
      echo "=== hyprctl monitors all ==="
      hyprctl monitors all -j 2>&1 || true
      echo
      echo "=== hyprctl workspaces ==="
      hyprctl workspaces -j 2>&1 || true
      echo
      echo "=== hyprctl devices (keyboards) ==="
      hyprctl devices -j 2>/dev/null | ${pkgs.jq}/bin/jq '.keyboards // .' 2>&1 || true
      echo
      echo "=== systemd-inhibit --list ==="
      ${pkgs.systemd}/bin/systemd-inhibit --list 2>&1 || true
      echo
      echo "=== DRM connector status ==="
      for s in /sys/class/drm/*/status; do
        [ -r "$s" ] || continue
        echo "$s: $(cat "$s" 2>/dev/null)"
      done
      echo
      echo "=== journal user display/idle (last 100) ==="
      journalctl --user -t nomarchy-display-watch -t nomarchy-display-transition \
        -t nomarchy-display-wake -t hypridle -t hyprlock -n 100 --no-pager 2>&1 || true
      echo
      echo "=== journal -b suspend/sleep/dpms (last 80 matching) ==="
      journalctl -b --no-pager 2>/dev/null \
        | ${pkgs.gnugrep}/bin/grep -iE 'Suspending|PM: suspend|PM: hibernate|dpms|sleep\.target|systemd-sleep' \
        | ${pkgs.coreutils}/bin/tail -n 80 || true
    } >"$out" 2>&1
    ${pkgs.util-linux}/bin/logger -t nomarchy-display-dump -- "reason=$reason wrote $out"
    command -v notify-send >/dev/null 2>&1 \
      && notify-send "Display dump" "$out" 2>/dev/null || true
    printf '%s\n' "$out"
  '';

  wake =
    if displayTransition == null then null
    else pkgs.writeShellScriptBin "nomarchy-display-wake" ''
      set -u
      LOGGER=${pkgs.util-linux}/bin/logger
      log() { "$LOGGER" -t nomarchy-display-wake -- "$*"; }
      TRANSITION=${displayTransition}/bin/nomarchy-display-transition
      DUMP=${dump}/bin/nomarchy-display-dump
      hyprctl dispatch dpms on >/dev/null 2>&1 || true
      enabled=$(hyprctl monitors -j 2>/dev/null | ${pkgs.jq}/bin/jq 'length' 2>/dev/null || echo 0)
      case "$enabled" in *[!0-9]*|"") enabled=0 ;; esac
      if [ "$enabled" -eq 0 ]; then
        log "zero-enabled-outputs: attempting internal enable"
        internal=$(hyprctl monitors all -j 2>/dev/null \
          | ${pkgs.jq}/bin/jq -r '.[] | select(.name | test("^(eDP|LVDS|DSI)")) | .name' 2>/dev/null \
          | ${pkgs.coreutils}/bin/head -n1)
        if [ -n "$internal" ]; then
          if "$TRANSITION" undock "$internal" 2>/dev/null; then
            log "rescued via undock internal=$internal"
          elif "$TRANSITION" enable "$internal" 2>/dev/null; then
            log "rescued via enable internal=$internal"
          else
            log "rescue failed internal=$internal"
          fi
        else
          log "no internal output in monitors all"
        fi
        hyprctl dispatch dpms on >/dev/null 2>&1 || true
        enabled=$(hyprctl monitors -j 2>/dev/null | ${pkgs.jq}/bin/jq 'length' 2>/dev/null || echo 0)
        case "$enabled" in *[!0-9]*|"") enabled=0 ;; esac
        if [ "$enabled" -eq 0 ]; then
          log "still zero-enabled: dumping"
          "$DUMP" auto-zero-after-wake >/dev/null 2>&1 || true
        fi
      fi
      first=$(hyprctl monitors -j 2>/dev/null \
        | ${pkgs.jq}/bin/jq -r '.[0].name // empty' 2>/dev/null || true)
      [ -n "$first" ] && hyprctl dispatch focusmonitor "$first" >/dev/null 2>&1 || true
      log "done enabled=$enabled first=''${first:-none}"
    '';
in
{
  displayDumpTool = dump;
  displayWakeTool = wake;
}