#!/usr/bin/env python3
import os
import gc
import math
import time
import ctypes
import numpy as np
from pathlib import Path
from setproctitle import setproctitle

from cereal import messaging
from cereal.messaging import PubMaster, SubMaster
from msgq.visionipc import VisionIpcClient, VisionStreamType, VisionBuf
from openpilot.common.swaglog import cloudlog
from openpilot.common.realtime import set_realtime_priority
from openpilot.common.transformations.model import dmonitoringmodel_intrinsics
from openpilot.common.transformations.camera import _ar_ox_fisheye, _os_fisheye
from openpilot.selfdrive.modeld.models.commonmodel_pyx import CLContext, MonitoringModelFrame
from openpilot.selfdrive.modeld.runners import ModelRunner, Runtime
from openpilot.selfdrive.modeld.parse_model_outputs import sigmoid

CALIB_LEN = 3
FEATURE_LEN = 512
OUTPUT_SIZE = 84 + FEATURE_LEN

PROCESS_NAME = "selfdrive.modeld.dmonitoringmodeld"
SEND_RAW_PRED = os.getenv('SEND_RAW_PRED')
MODEL_PATHS = {
  ModelRunner.THNEED: Path(__file__).parent / 'models/dmonitoring_model.thneed',
  ModelRunner.ONNX: Path(__file__).parent / 'models/dmonitoring_model.onnx'}

class DriverStateResult(ctypes.Structure):
  _fields_ = [
    ("face_orientation", ctypes.c_float*3),
    ("face_position", ctypes.c_float*3),
    ("face_orientation_std", ctypes.c_float*3),
    ("face_position_std", ctypes.c_float*3),
    ("face_prob", ctypes.c_float),
    ("_unused_a", ctypes.c_float*8),
    ("left_eye_prob", ctypes.c_float),
    ("_unused_b", ctypes.c_float*8),
    ("right_eye_prob", ctypes.c_float),
    ("left_blink_prob", ctypes.c_float),
    ("right_blink_prob", ctypes.c_float),
    ("sunglasses_prob", ctypes.c_float),
    ("occluded_prob", ctypes.c_float),
    ("ready_prob", ctypes.c_float*4),
    ("not_ready_prob", ctypes.c_float*2)]

class DMonitoringModelResult(ctypes.Structure):
  _fields_ = [
    ("driver_state_lhd", DriverStateResult),
    ("driver_state_rhd", DriverStateResult),
    ("poor_vision_prob", ctypes.c_float),
    ("wheel_on_right_prob", ctypes.c_float),
    ("features", ctypes.c_float*FEATURE_LEN)]

class ModelState:
  inputs: dict[str, np.ndarray]
  output: np.ndarray
  model: ModelRunner

  def __init__(self, cl_ctx):
    assert ctypes.sizeof(DMonitoringModelResult) == OUTPUT_SIZE * ctypes.sizeof(ctypes.c_float)

    self.frame = MonitoringModelFrame(cl_ctx)
    self.output = np.zeros(OUTPUT_SIZE, dtype=np.float32)
    self.inputs = {
      'calib': np.zeros(CALIB_LEN, dtype=np.float32)}

    self.model = ModelRunner(MODEL_PATHS, self.output, Runtime.GPU, False, cl_ctx)
    self.model.addInput("input_img", None)
    self.model.addInput("calib", self.inputs['calib'])

  def run(self, buf:VisionBuf, calib:np.ndarray, transform:np.ndarray) -> tuple[np.ndarray, float]:
    self.inputs['calib'][:] = calib

    self.model.setInputBuffer("input_img", self.frame.prepare(buf, transform.flatten(), None).view(np.float32))

    t1 = time.perf_counter()
    self.model.execute()
    t2 = time.perf_counter()
    return self.output, t2 - t1


def fill_driver_state(msg, ds_result: DriverStateResult):
  msg.faceOrientation = list(ds_result.face_orientation)
  msg.faceOrientationStd = [math.exp(x) for x in ds_result.face_orientation_std]
  msg.facePosition = list(ds_result.face_position[:2])
  msg.facePositionStd = [math.exp(x) for x in ds_result.face_position_std[:2]]
  msg.faceProb = float(sigmoid(ds_result.face_prob))
  msg.leftEyeProb = float(sigmoid(ds_result.left_eye_prob))
  msg.rightEyeProb = float(sigmoid(ds_result.right_eye_prob))
  msg.leftBlinkProb = float(sigmoid(ds_result.left_blink_prob))
  msg.rightBlinkProb = float(sigmoid(ds_result.right_blink_prob))
  msg.sunglassesProb = float(sigmoid(ds_result.sunglasses_prob))
  msg.occludedProb = float(sigmoid(ds_result.occluded_prob))
  msg.readyProb = [float(sigmoid(x)) for x in ds_result.ready_prob]
  msg.notReadyProb = [float(sigmoid(x)) for x in ds_result.not_ready_prob]

def get_driverstate_packet(model_output: np.ndarray, frame_id: int, location_ts: int, execution_time: float, gpu_execution_time: float):
  model_result = ctypes.cast(model_output.ctypes.data, ctypes.POINTER(DMonitoringModelResult)).contents
  msg = messaging.new_message('driverStateV2', valid=True)
  ds = msg.driverStateV2
  ds.frameId = frame_id
  ds.modelExecutionTime = execution_time
  ds.gpuExecutionTime = gpu_execution_time
  ds.poorVisionProb = float(sigmoid(model_result.poor_vision_prob))
  ds.wheelOnRightProb = float(sigmoid(model_result.wheel_on_right_prob))
  ds.rawPredictions = model_output.tobytes() if SEND_RAW_PRED else b''
  fill_driver_state(ds.leftDriverData, model_result.driver_state_lhd)
  fill_driver_state(ds.rightDriverData, model_result.driver_state_rhd)
  return msg


def main():
  gc.disable()
  setproctitle(PROCESS_NAME)
  set_realtime_priority(1)

  cl_context = CLContext()
  model = ModelState(cl_context)
  cloudlog.warning("models loaded, dmonitoringmodeld starting")

  cloudlog.warning("connecting to driver stream")
  vipc_client = VisionIpcClient("camerad", VisionStreamType.VISION_STREAM_DRIVER, True, cl_context)
  while not vipc_client.connect(False):
    time.sleep(0.1)
  assert vipc_client.is_connected()
  cloudlog.warning(f"connected with buffer size: {vipc_client.buffer_len}")

  sm = SubMaster(["liveCalibration"])
  pm = PubMaster(["driverStateV2"])

  calib = np.zeros(CALIB_LEN, dtype=np.float32)
  model_transform = None

  while True:
    buf = vipc_client.recv()
    if buf is None:
      continue

    if model_transform is None:
      cam = _os_fisheye if buf.width == _os_fisheye.width else _ar_ox_fisheye
      model_transform = np.linalg.inv(np.dot(dmonitoringmodel_intrinsics, np.linalg.inv(cam.intrinsics))).astype(np.float32)

    sm.update(0)
    if sm.updated["liveCalibration"]:
      calib[:] = np.array(sm["liveCalibration"].rpyCalib)

    t1 = time.perf_counter()
    model_output, gpu_execution_time = model.run(buf, calib, model_transform)
    t2 = time.perf_counter()

    pm.send("driverStateV2", get_driverstate_packet(model_output, vipc_client.frame_id, vipc_client.timestamp_sof, t2 - t1, gpu_execution_time))


if __name__ == "__main__":
  main()