#!/usr/bin/env bash
# Hermit Desktop — official local dev entry (engine preferred).
#
# Required for real turns:
#   - libcstcore.a at repo root (auto-enables --features engine), OR HERMIT_FEATURES=engine
#   - DEEPSEEK_API_KEY in the environment, OR set the key in Settings after launch
#
# Host-only (no engine): HERMIT_FEATURES=host ./run-dev.sh
#   Composer will refuse send until engine is available (no silent mock product path).
# UI mock turns (browser/host demos only): localStorage hermit.allowMock=1 or VITE_HERMIT_ALLOW_MOCK=1
#
# Hand-check: new session → type → streaming assistant → Stop → reopen session has history
set -euo pipefail
cd "$(dirname "$0")"

# 补 PKG_CONFIG_PATH（勿整文件 source set-environment：会撞 set -u）
if [[ -z "${PKG_CONFIG_PATH:-}" ]]; then
  if [[ -f /etc/set-environment ]]; then
    PKG_CONFIG_PATH="$(set +u; . /etc/set-environment >/dev/null; printf '%s' "${PKG_CONFIG_PATH:-}")"
    export PKG_CONFIG_PATH
  fi
fi

if [[ -z "${PKG_CONFIG_PATH:-}" ]]; then
  echo "hermit-dev: PKG_CONFIG_PATH 为空。请用 hermit-tauri-dev 或 nixos-rebuild 后重开终端" >&2
  exit 1
fi
if ! pkg-config --exists webkit2gtk-4.1 gdk-pixbuf-2.0 2>/dev/null; then
  echo "hermit-dev: 缺少 webkit/gdk-pixbuf .pc" >&2
  exit 1
fi

unset WEBKIT_DISABLE_COMPOSITING_MODE || true

if [[ -f /proc/driver/nvidia/version ]]; then
  export __NV_DISABLE_EXPLICIT_SYNC="${__NV_DISABLE_EXPLICIT_SYNC:-1}"
  # X11/XWayland 上 WebKit DMABUF →「Failed to create GBM buffer」→ 空白灰窗
  # 必须关 DMABUF；Wayland 原生则可只靠 __NV_DISABLE_EXPLICIT_SYNC
  if [[ -n "${WAYLAND_DISPLAY:-}" || "${XDG_SESSION_TYPE:-}" == wayland ]]; then
    export GDK_BACKEND="${GDK_BACKEND:-x11}"
  fi
  if [[ "${GDK_BACKEND:-}" == x11 ]]; then
    export WEBKIT_DISABLE_DMABUF_RENDERER="${WEBKIT_DISABLE_DMABUF_RENDERER:-1}"
  else
    unset WEBKIT_DISABLE_DMABUF_RENDERER || true
  fi
fi

export TAURI_DEV_HOST="${TAURI_DEV_HOST:-127.0.0.1}"

# Optional real engine (libcstcore). Example:
#   HERMIT_FEATURES=engine ./run-dev.sh
#   # or:
#   HERMIT_CORE_LIB=$PWD/../../libcstcore.a \
#   HERMIT_CORE_INCLUDE=$PWD/../../include \
#   npm run tauri -- dev -- --features engine
TAURI_EXTRA=()
ROOT="$(cd ../.. && pwd)"
# Auto-enable engine when libcstcore.a exists, unless HERMIT_FEATURES=host
if [[ "${HERMIT_FEATURES:-}" == *engine* ]] || {
  [[ "${HERMIT_FEATURES:-}" != *host* ]] && [[ -f "$ROOT/libcstcore.a" ]]
}; then
  export HERMIT_CORE_LIB="${HERMIT_CORE_LIB:-$ROOT/libcstcore.a}"
  export HERMIT_CORE_INCLUDE="${HERMIT_CORE_INCLUDE:-$ROOT/include}"
  if [[ -f "$HERMIT_CORE_LIB" ]]; then
    # NixOS: -lcurl needs an explicit libdir (pkg-config or ldd).
    if [[ -z "${HERMIT_CURL_LIBDIR:-}" ]]; then
      if pkg-config --exists libcurl 2>/dev/null; then
        HERMIT_CURL_LIBDIR="$(pkg-config --variable=libdir libcurl 2>/dev/null || true)"
      fi
      if [[ -z "${HERMIT_CURL_LIBDIR:-}" ]] && command -v curl >/dev/null 2>&1; then
        curl_so="$(ldd "$(command -v curl)" 2>/dev/null | awk '/libcurl\.so/ { print $3; exit }' || true)"
        if [[ -n "${curl_so:-}" && -e "$curl_so" ]]; then
          HERMIT_CURL_LIBDIR="$(dirname "$curl_so")"
        fi
      fi
      if [[ -n "${HERMIT_CURL_LIBDIR:-}" ]]; then
        export HERMIT_CURL_LIBDIR
        export LD_LIBRARY_PATH="${HERMIT_CURL_LIBDIR}${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}"
      fi
    fi
    echo "hermit-dev: engine feature  HERMIT_CORE_LIB=$HERMIT_CORE_LIB curl=${HERMIT_CURL_LIBDIR:-default}" >&2
    TAURI_EXTRA+=(--features engine)
  else
    echo "hermit-dev: engine requested but missing $HERMIT_CORE_LIB (host mock)" >&2
  fi
fi

for p in 1420 1421; do
  if command -v fuser >/dev/null 2>&1; then
    fuser -k "${p}/tcp" 2>/dev/null || true
  else
    mapfile -t pids < <(ss -ltnp 2>/dev/null | awk -v p=":$p" '$4 ~ p {
      if (match($0, /pid=[0-9]+/)) { print substr($0, RSTART+4, RLENGTH-4) }
    }' | sort -u)
    for pid in "${pids[@]:-}"; do
      [[ -n "${pid:-}" ]] && kill "$pid" 2>/dev/null || true
    done
  fi
done
sleep 0.3

if [[ -z "${DEEPSEEK_API_KEY:-}" && -z "${OPENAI_API_KEY:-}" ]]; then
  echo "hermit-dev: note — no DEEPSEEK_API_KEY/OPENAI_API_KEY in env; set one or paste key in Settings" >&2
fi

if printf '%s\n' "${TAURI_EXTRA[@]:-}" | grep -qx -- '--features' && printf '%s\n' "${TAURI_EXTRA[@]:-}" | grep -qx engine; then
  echo "hermit-dev: mode=engine (libcstcore)" >&2
elif printf '%s\n' "${TAURI_EXTRA[@]:-}" | grep -q engine; then
  echo "hermit-dev: mode=engine (libcstcore)" >&2
else
  echo "hermit-dev: mode=host (Composer send disabled until engine)" >&2
fi

echo "hermit-dev: GDK_BACKEND=${GDK_BACKEND:-none} DMABUF_OFF=${WEBKIT_DISABLE_DMABUF_RENDERER:-0} NV_SYNC=${__NV_DISABLE_EXPLICIT_SYNC:-0} host=${TAURI_DEV_HOST}" >&2
exec npm run tauri -- dev "${TAURI_EXTRA[@]}" "$@"