import re
from collections import namedtuple
from dataclasses import dataclass, field
from enum import Enum
from typing import Dict, List, Optional, Tuple, Union, no_type_check

from cereal import car
from common.conversions import Conversions as CV

GOOD_TORQUE_THRESHOLD = 1.0  # m/s^2
MODEL_YEARS_RE = r"(?<= )((\d{4}-\d{2})|(\d{4}))(,|$)"


class Tier(Enum):
  GOLD = 0
  SILVER = 1
  BRONZE = 2


class Column(Enum):
  MAKE = "Make"
  MODEL = "Model"
  PACKAGE = "Supported Package"
  LONGITUDINAL = "openpilot ACC"
  FSR_LONGITUDINAL = "Stop and Go"
  FSR_STEERING = "Steer to 0"
  STEERING_TORQUE = "Steering Torque"


class Star(Enum):
  FULL = "full"
  HALF = "half"
  EMPTY = "empty"


StarColumns = list(Column)[3:]
TierColumns = (Column.FSR_LONGITUDINAL, Column.FSR_STEERING, Column.STEERING_TORQUE)
CarFootnote = namedtuple("CarFootnote", ["text", "column", "star"], defaults=[None])


def get_footnotes(footnotes: List[Enum], column: Column) -> List[Enum]:
  # Returns applicable footnotes given current column
  return [fn for fn in footnotes if fn.value.column == column]


# TODO: store years as a list
def get_year_list(years):
  years_list = []
  if len(years) == 0:
    return years_list

  for year in years.split(','):
    year = year.strip()
    if len(year) == 4:
      years_list.append(str(year))
    elif "-" in year and len(year) == 7:
      start, end = year.split("-")
      years_list.extend(map(str, range(int(start), int(f"20{end}") + 1)))
    else:
      raise Exception(f"Malformed year string: {years}")
  return years_list


def split_name(name: str) -> Tuple[str, str, str]:
  make, model = name.split(" ", 1)
  years = ""
  match = re.search(MODEL_YEARS_RE, model)
  if match is not None:
    years = model[match.start():]
    model = model[:match.start() - 1]
  return make, model, years


@dataclass
class CarInfo:
  name: str
  package: str
  video_link: Optional[str] = None
  footnotes: List[Enum] = field(default_factory=list)
  min_steer_speed: Optional[float] = None
  min_enable_speed: Optional[float] = None
  harness: Optional[Enum] = None

  def init(self, CP: car.CarParams, all_footnotes: Dict[Enum, int]):
    # TODO: set all the min steer speeds in carParams and remove this
    if self.min_steer_speed is not None:
      assert CP.minSteerSpeed == 0, f"{CP.carFingerprint}: Minimum steer speed set in both CarInfo and CarParams"
    else:
      self.min_steer_speed = CP.minSteerSpeed

    assert self.harness is not None, f"{CP.carFingerprint}: Need to specify car harness"

    # TODO: set all the min enable speeds in carParams correctly and remove this
    if self.min_enable_speed is None:
      self.min_enable_speed = CP.minEnableSpeed

    self.car_name = CP.carName
    self.car_fingerprint = CP.carFingerprint
    self.make, self.model, self.years = split_name(self.name)
    self.row = {
      Column.MAKE: self.make,
      Column.MODEL: self.model,
      Column.PACKAGE: self.package,
      # StarColumns
      Column.LONGITUDINAL: Star.FULL if CP.openpilotLongitudinalControl and not CP.radarOffCan else Star.EMPTY,
      Column.FSR_LONGITUDINAL: Star.FULL if self.min_enable_speed <= 0. else Star.EMPTY,
      Column.FSR_STEERING: Star.FULL if self.min_steer_speed <= 0. else Star.EMPTY,
      Column.STEERING_TORQUE: Star.EMPTY,
    }

    # Set steering torque star from max lateral acceleration
    assert CP.maxLateralAccel > 0.1
    if CP.maxLateralAccel >= GOOD_TORQUE_THRESHOLD:
      self.row[Column.STEERING_TORQUE] = Star.FULL

    if CP.notCar:
      for col in StarColumns:
        self.row[col] = Star.FULL

    self.all_footnotes = all_footnotes
    for column in StarColumns:
      # Demote if footnote specifies a star
      for fn in get_footnotes(self.footnotes, column):
        if fn.value.star is not None:
          self.row[column] = fn.value.star

    # openpilot ACC star doesn't count for tiers
    full_stars = [s for col, s in self.row.items() if col in TierColumns].count(Star.FULL)
    if full_stars == len(TierColumns):
      self.tier = Tier.GOLD
    elif full_stars == len(TierColumns) - 1:
      self.tier = Tier.SILVER
    else:
      self.tier = Tier.BRONZE

    self.year_list = get_year_list(self.years)
    self.detail_sentence = self.get_detail_sentence(CP)

    return self

  def get_detail_sentence(self, CP):
    if not CP.notCar:
      sentence_builder = "openpilot upgrades your <strong>{car_model}</strong> with automated lane centering{alc} and adaptive cruise control{acc}."

      if self.min_steer_speed > self.min_enable_speed:
        alc = f" <strong>above {self.min_steer_speed * CV.MS_TO_MPH:.0f} mph</strong>," if self.min_steer_speed > 0 else " <strong>at all speeds</strong>,"
      else:
        alc = ""

      # Exception for Nissan, Subaru, and stock long Toyota which do not auto-resume yet
      acc = ""
      if self.min_enable_speed > 0:
        acc = f" <strong>while driving above {self.min_enable_speed * CV.MS_TO_MPH:.0f} mph</strong>"
      elif CP.carName not in ("nissan", "subaru", "toyota") or (CP.carName == "toyota" and CP.openpilotLongitudinalControl):
        acc = " <strong>that automatically resumes from a stop</strong>"

      if self.row[Column.STEERING_TORQUE] != Star.FULL:
        sentence_builder += " This car may not be able to take tight turns on its own."

      return sentence_builder.format(car_model=f"{self.make} {self.model}", alc=alc, acc=acc)

    else:
      if CP.carFingerprint == "COMMA BODY":
        return "The body is a robotics dev kit that can run openpilot. <a href='https://www.commabody.com'>Learn more.</a>"
      else:
        raise Exception(f"This notCar does not have a detail sentence: {CP.carFingerprint}")

  @no_type_check
  def get_column(self, column: Column, star_icon: str, footnote_tag: str) -> str:
    item: Union[str, Star] = self.row[column]
    if column in StarColumns:
      item = star_icon.format(item.value)
    elif column == Column.MODEL and len(self.years):
      item += f" {self.years}"

    footnotes = get_footnotes(self.footnotes, column)
    if len(footnotes):
      sups = sorted([self.all_footnotes[fn] for fn in footnotes])
      item += footnote_tag.format(f'{",".join(map(str, sups))}')

    return item


class Harness(Enum):
  nidec = "Honda Nidec"
  bosch_a = "Honda Bosch A"
  bosch_b = "Honda Bosch B"
  toyota = "Toyota"
  subaru_a = "Subaru A"
  subaru_b = "Subaru B"
  fca = "FCA"
  ram = "Ram"
  vw = "VW"
  j533 = "J533"
  hyundai_a = "Hyundai A"
  hyundai_b = "Hyundai B"
  hyundai_c = "Hyundai C"
  hyundai_d = "Hyundai D"
  hyundai_e = "Hyundai E"
  hyundai_f = "Hyundai F"
  hyundai_g = "Hyundai G"
  hyundai_h = "Hyundai H"
  hyundai_i = "Hyundai I"
  hyundai_j = "Hyundai J"
  hyundai_k = "Hyundai K"
  hyundai_l = "Hyundai L"
  hyundai_m = "Hyundai M"
  hyundai_n = "Hyundai N"
  hyundai_o = "Hyundai O"
  hyundai_p = "Hyundai P"
  custom = "Developer"
  obd_ii = "OBD-II"
  nissan_a = "Nissan A"
  nissan_b = "Nissan B"
  mazda = "Mazda"
  none = "None"


STAR_DESCRIPTIONS = {
  "Gas & Brakes": {  # icon and row name
    Column.FSR_LONGITUDINAL.value: [
      [Star.FULL.value, "openpilot operates down to 0 mph."],
      [Star.EMPTY.value, "openpilot operates only above a minimum speed. See your car's manual for the minimum speed."],
    ],
  },
  "Steering": {
    Column.FSR_STEERING.value: [
      [Star.FULL.value, "openpilot can control the steering wheel down to 0 mph."],
      [Star.EMPTY.value, "No steering control below certain speeds. See your car's manual for the minimum speed."],
    ],
    Column.STEERING_TORQUE.value: [
      [Star.FULL.value, "Car has enough steering torque to comfortably take most highway turns."],
      [Star.EMPTY.value, "Limited ability to make tighter turns."],
    ],
  },
}