"""
This module contains printer profile related code.

A printer profile is a ``dict`` of the following structure:

.. list-table::
   :widths: 15 5 30
   :header-rows: 1

   * - Name
     - Type
     - Description
   * - ``id``
     - ``string``
     - Internal id of the printer profile
   * - ``name``
     - ``string``
     - Human readable name of the printer profile
   * - ``model``
     - ``string``
     - Printer model
   * - ``color``
     - ``string``
     - Color to associate with the printer profile
   * - ``volume``
     - ``dict``
     - Information about the print volume
   * - ``volume.width``
     - ``float``
     - Width of the print volume (X axis)
   * - ``volume.depth``
     - ``float``
     - Depth of the print volume (Y axis)
   * - ``volume.height``
     - ``float``
     - Height of the print volume (Z axis)
   * - ``volume.formFactor``
     - ``string``
     - Form factor of the print bed, either ``rectangular`` or ``circular``
   * - ``volume.origin``
     - ``string``
     - Location of gcode origin in the print volume, either ``lowerleft`` or ``center``
   * - ``volume.custom_box``
     - ``dict`` or ``False``
     - Custom boundary box overriding the default bounding box based on the provided width, depth, height and origin.
       If ``False``, the default boundary box will be used.
   * - ``volume.custom_box.x_min``
     - ``float``
     - Minimum valid X coordinate
   * - ``volume.custom_box.y_min``
     - ``float``
     - Minimum valid Y coordinate
   * - ``volume.custom_box.z_min``
     - ``float``
     - Minimum valid Z coordinate
   * - ``volume.custom_box.x_max``
     - ``float``
     - Maximum valid X coordinate
   * - ``volume.custom_box.y_max``
     - ``float``
     - Maximum valid Y coordinate
   * - ``volume.custom_box.z_max``
     - ``float``
     - Maximum valid Z coordinate
   * - ``heatedBed``
     - ``bool``
     - Whether the printer has a heated bed (``True``) or not (``False``)
   * - ``heatedChamber``
     - ``bool``
     - Whether the printer has a heated chamber (``True``) or not (``False``)
   * - ``extruder``
     - ``dict``
     - Information about the printer's extruders
   * - ``extruder.count``
     - ``int``
     - How many extruders the printer has (default 1)
   * - ``extruder.offsets``
     - ``list`` of ``tuple``
     - Extruder offsets relative to first extruder, list of (x, y) tuples, first is always (0,0)
   * - ``extruder.nozzleDiameter``
     - ``float``
     - Diameter of the printer nozzle(s)
   * - ``extruder.sharedNozzle``
     - ``boolean``
     - Whether there's only one nozzle shared among all extruders (true) or one nozzle per extruder (false).
   * - ``extruder.defaultExtrusionLength``
     - ``int``
     - Default extrusion length used in Control tab on initial page load in mm.
   * - ``axes``
     - ``dict``
     - Information about the printer axes
   * - ``axes.x``
     - ``dict``
     - Information about the printer's X axis
   * - ``axes.x.speed``
     - ``float``
     - Speed of the X axis in mm/min
   * - ``axes.x.inverted``
     - ``bool``
     - Whether a positive value change moves the nozzle away from the print bed's origin (False, default) or towards it (True)
   * - ``axes.y``
     - ``dict``
     - Information about the printer's Y axis
   * - ``axes.y.speed``
     - ``float``
     - Speed of the Y axis in mm/min
   * - ``axes.y.inverted``
     - ``bool``
     - Whether a positive value change moves the nozzle away from the print bed's origin (False, default) or towards it (True)
   * - ``axes.z``
     - ``dict``
     - Information about the printer's Z axis
   * - ``axes.z.speed``
     - ``float``
     - Speed of the Z axis in mm/min
   * - ``axes.z.inverted``
     - ``bool``
     - Whether a positive value change moves the nozzle away from the print bed (False, default) or towards it (True)
   * - ``axes.e``
     - ``dict``
     - Information about the printer's E axis
   * - ``axes.e.speed``
     - ``float``
     - Speed of the E axis in mm/min
   * - ``axes.e.inverted``
     - ``bool``
     - Whether a positive value change extrudes (False, default) or retracts (True) filament

.. autoclass:: PrinterProfileManager
   :members:

.. autoclass:: BedFormFactor
   :members:

.. autoclass:: BedOrigin
   :members:

.. autoclass:: SaveError

.. autoclass:: CouldNotOverwriteError

.. autoclass:: InvalidProfileError
"""

__author__ = "Gina Häußge <osd@foosel.net>"
__license__ = "GNU Affero General Public License http://www.gnu.org/licenses/agpl.html"
__copyright__ = "Copyright (C) 2014 The OctoPrint Project - Released under terms of the AGPLv3 License"


import copy
import logging
import os

from octoprint.settings import settings
from octoprint.util import (
    dict_contains_keys,
    dict_merge,
    dict_sanitize,
    is_hidden_path,
    yaml,
)


class SaveError(Exception):
    """Saving a profile failed"""

    pass


class CouldNotOverwriteError(SaveError):
    """Overwriting of a profile not allowed"""

    pass


class InvalidProfileError(Exception):
    """Profile invalid"""

    pass


class BedFormFactor:
    """Valid values for bed form factor"""

    RECTANGULAR = "rectangular"
    """Rectangular bed"""

    CIRCULAR = "circular"
    """Circular bed"""

    @classmethod
    def values(cls):
        return [
            getattr(cls, name)
            for name in cls.__dict__
            if not (name.startswith("__") or name == "values")
        ]


BedTypes = BedFormFactor
"""Deprecated name of :class:`BedFormFactors`"""


class BedOrigin:
    """Valid values for bed origin"""

    LOWERLEFT = "lowerleft"
    """Origin at lower left corner of the bed when looking from the top"""

    CENTER = "center"
    """Origin at the center of the bed when looking from top"""

    @classmethod
    def values(cls):
        return [
            getattr(cls, name)
            for name in cls.__dict__
            if not (name.startswith("__") or name == "values")
        ]


class PrinterProfileManager:
    """
    Manager for printer profiles. Offers methods to select the globally used printer profile and to list, add, remove,
    load and save printer profiles.
    """

    default = {
        "id": "_default",
        "name": "Default",
        "model": "Generic RepRap Printer",
        "color": "default",
        "volume": {
            "width": 200,
            "depth": 200,
            "height": 200,
            "formFactor": BedFormFactor.RECTANGULAR,
            "origin": BedOrigin.LOWERLEFT,
            "custom_box": False,
        },
        "heatedBed": True,
        "heatedChamber": False,
        "extruder": {
            "count": 1,
            "offsets": [(0, 0)],
            "nozzleDiameter": 0.4,
            "sharedNozzle": False,
            "defaultExtrusionLength": 5,
        },
        "axes": {
            "x": {"speed": 6000, "inverted": False},
            "y": {"speed": 6000, "inverted": False},
            "z": {"speed": 200, "inverted": False},
            "e": {"speed": 300, "inverted": False},
        },
    }

    def __init__(self):
        self._current = None
        self._logger = logging.getLogger(__name__)

        fresh = settings().checkBaseFolder("printerProfiles")
        self._folder = settings().getBaseFolder("printerProfiles")

        self._migrate_old_default_profile()
        self._verify_default_available(fresh=fresh)

    def _migrate_old_default_profile(self):
        default_overrides = settings().get(["printerProfiles", "defaultProfile"])
        if not default_overrides:
            return

        if self.exists("_default"):
            return

        if not isinstance(default_overrides, dict):
            self._logger.warning(
                "Existing default profile from settings is not a valid profile, refusing to migrate: {!r}".format(
                    default_overrides
                )
            )
            return

        default_overrides["id"] = "_default"
        self.save(default_overrides)

        settings().set(["printerProfiles", "defaultProfile"], None)
        settings().save()

        self._logger.info(
            "Migrated default printer profile from settings to _default.profile: {!r}".format(
                default_overrides
            )
        )

    def _verify_default_available(self, fresh=False):
        default_id = settings().get(["printerProfiles", "default"])
        if default_id is None:
            default_id = "_default"

        if not self.exists(default_id):
            if not self.exists("_default"):
                if not fresh:
                    if default_id == "_default":
                        self._logger.error(
                            "Profile _default does not exist, creating _default again and setting it as default"
                        )
                    else:
                        self._logger.error(
                            "Selected default profile {} and _default do not exist, creating _default again and setting it as default".format(
                                default_id
                            )
                        )
                self.save(self.__class__.default, allow_overwrite=True, make_default=True)
            else:
                self._logger.error(
                    "Selected default profile {} does not exists, resetting to _default".format(
                        default_id
                    )
                )
                settings().set(["printerProfiles", "default"], "_default")
                settings().save()
            default_id = "_default"

        profile = self.get(default_id)
        if profile is None:
            self._logger.error(
                "Selected default profile {} is invalid, resetting to default values".format(
                    default_id
                )
            )
            profile = copy.deepcopy(self.__class__.default)
            profile["id"] = default_id
            self.save(self.__class__.default, allow_overwrite=True, make_default=True)

    def select(self, identifier):
        if identifier is None or not self.exists(identifier):
            self._current = self.get_default()
            return False
        else:
            self._current = self.get(identifier)
            if self._current is None:
                self._logger.error(
                    "Profile {} is invalid, cannot select, falling back to default".format(
                        identifier
                    )
                )
                self._current = self.get_default()
                return False
            else:
                return True

    def deselect(self):
        self._current = None

    def get_all(self):
        return self._load_all()

    def get(self, identifier):
        try:
            if self.exists(identifier):
                return self._load_from_path(self._get_profile_path(identifier))
            else:
                return None
        except InvalidProfileError:
            return None

    def remove(self, identifier, trigger_event=False):
        if self._current is not None and self._current["id"] == identifier:
            return False
        elif settings().get(["printerProfiles", "default"]) == identifier:
            return False

        removed = self._remove_from_path(self._get_profile_path(identifier))
        if removed and trigger_event:
            from octoprint.events import Events, eventManager

            payload = {"identifier": identifier}
            eventManager().fire(Events.PRINTER_PROFILE_DELETED, payload=payload)

        return removed

    def save(
        self, profile, allow_overwrite=False, make_default=False, trigger_event=False
    ):
        if "id" in profile:
            identifier = profile["id"]
        elif "name" in profile:
            identifier = profile["name"]
        else:
            raise InvalidProfileError("profile must contain either id or name")

        identifier = self._sanitize(identifier)
        profile["id"] = identifier

        self._migrate_profile(profile)
        profile = dict_sanitize(profile, self.__class__.default)
        profile = dict_merge(self.__class__.default, profile)

        path = self._get_profile_path(identifier)
        is_overwrite = os.path.exists(path)

        self._save_to_path(path, profile, allow_overwrite=allow_overwrite)

        if make_default:
            settings().set(["printerProfiles", "default"], identifier)
            settings().save()

        if self._current is not None and self._current["id"] == identifier:
            self.select(identifier)

        from octoprint.events import Events, eventManager

        if trigger_event:
            payload = {"identifier": identifier}
            event = (
                Events.PRINTER_PROFILE_MODIFIED
                if is_overwrite
                else Events.PRINTER_PROFILE_ADDED
            )
            eventManager().fire(event, payload=payload)

        return self.get(identifier)

    def is_default_unmodified(self):
        default = settings().get(["printerProfiles", "default"])
        return default is None or default == "_default" or not self.exists("_default")

    @property
    def profile_count(self):
        return len(self._load_all_identifiers())

    @property
    def last_modified(self):
        dates = [os.stat(self._folder).st_mtime]
        dates += [
            entry.stat().st_mtime
            for entry in os.scandir(self._folder)
            if entry.name.endswith(".profile")
        ]
        return max(dates)

    def get_default(self):
        default = settings().get(["printerProfiles", "default"])
        if default is not None and self.exists(default):
            profile = self.get(default)
            if profile is not None:
                return profile
            else:
                self._logger.warning(
                    "Default profile {} is invalid, falling back to built-in defaults".format(
                        default
                    )
                )

        return copy.deepcopy(self.__class__.default)

    def set_default(self, identifier):
        all_identifiers = self._load_all_identifiers()
        if identifier is not None and identifier not in all_identifiers:
            return

        settings().set(["printerProfiles", "default"], identifier)
        settings().save()

    def get_current_or_default(self):
        if self._current is not None:
            return self._current
        else:
            return self.get_default()

    def get_current(self):
        return self._current

    def exists(self, identifier):
        if identifier is None:
            return False
        else:
            path = self._get_profile_path(identifier)
            return os.path.exists(path) and os.path.isfile(path)

    def _load_all(self):
        all_identifiers = self._load_all_identifiers()
        results = {}
        for identifier, path in all_identifiers.items():
            try:
                profile = self._load_from_path(path)
            except InvalidProfileError:
                self._logger.warning(f"Profile {identifier} is invalid, skipping")
                continue

            if profile is None:
                continue

            results[identifier] = dict_merge(self.__class__.default, profile)
        return results

    def _load_all_identifiers(self):
        results = {}
        for entry in os.scandir(self._folder):
            if is_hidden_path(entry.name) or not entry.name.endswith(".profile"):
                continue

            if not entry.is_file():
                continue

            identifier = entry.name[: -len(".profile")]
            results[identifier] = entry.path
        return results

    def _load_from_path(self, path):
        if not os.path.exists(path) or not os.path.isfile(path):
            return None

        profile = yaml.load_from_file(path=path)

        if profile is None or not isinstance(profile, dict):
            raise InvalidProfileError("Profile is None or not a dictionary")

        if self._migrate_profile(profile):
            try:
                self._save_to_path(path, profile, allow_overwrite=True)
            except Exception:
                self._logger.exception(
                    "Tried to save profile to {path} after migrating it while loading, ran into exception".format(
                        path=path
                    )
                )

        profile = self._ensure_valid_profile(profile)

        if not profile:
            self._logger.warning("Invalid profile: %s" % path)
            raise InvalidProfileError()
        return profile

    def _save_to_path(self, path, profile, allow_overwrite=False):
        validated_profile = self._ensure_valid_profile(profile)
        if not validated_profile:
            raise InvalidProfileError()

        if os.path.exists(path) and not allow_overwrite:
            raise SaveError(
                "Profile %s already exists and not allowed to overwrite" % profile["id"]
            )

        from octoprint.util import atomic_write

        try:
            with atomic_write(path, mode="wt", max_permissions=0o666) as f:
                yaml.save_to_file(profile, file=f, pretty=True)
        except Exception as e:
            self._logger.exception(
                "Error while trying to save profile %s" % profile["id"]
            )
            raise SaveError(
                "Cannot save profile {}: {}".format(profile["id"], str(e))
            ) from e

    def _remove_from_path(self, path):
        try:
            os.remove(path)
            return True
        except Exception:
            return False

    def _get_profile_path(self, identifier):
        return os.path.join(self._folder, "%s.profile" % identifier)

    def _sanitize(self, name):
        if name is None:
            return None

        if "/" in name or "\\" in name:
            raise ValueError("name must not contain / or \\")

        import string

        valid_chars = "-_.() {ascii}{digits}".format(
            ascii=string.ascii_letters, digits=string.digits
        )
        sanitized_name = "".join(c for c in name if c in valid_chars)
        sanitized_name = sanitized_name.replace(" ", "_")
        return sanitized_name

    def _migrate_profile(self, profile):
        # make sure profile format is up to date
        modified = False

        if (
            "volume" in profile
            and "formFactor" in profile["volume"]
            and "origin" not in profile["volume"]
        ):
            profile["volume"]["origin"] = (
                BedOrigin.CENTER
                if profile["volume"]["formFactor"] == BedFormFactor.CIRCULAR
                else BedOrigin.LOWERLEFT
            )
            modified = True

        if "volume" in profile and "custom_box" not in profile["volume"]:
            profile["volume"]["custom_box"] = False
            modified = True

        if "extruder" in profile and "sharedNozzle" not in profile["extruder"]:
            profile["extruder"]["sharedNozzle"] = False
            modified = True

        if (
            "extruder" in profile
            and "sharedNozzle" in profile["extruder"]
            and profile["extruder"]["sharedNozzle"]
        ):
            profile["extruder"]["offsets"] = [(0.0, 0.0)]
            modified = True

        if "extruder" in profile and "defaultExtrusionLength" not in profile["extruder"]:
            profile["extruder"]["defaultExtrusionLength"] = self.default["extruder"][
                "defaultExtrusionLength"
            ]
            modified = True

        if "heatedChamber" not in profile:
            profile["heatedChamber"] = False
            modified = True

        return modified

    def _ensure_valid_profile(self, profile):
        # ensure all keys are present
        if not dict_contains_keys(self.default, profile):
            self._logger.warning(
                "Profile invalid, missing keys. Expected: {expected!r}. Actual: {actual!r}".format(
                    expected=list(self.default.keys()), actual=list(profile.keys())
                )
            )
            return False

        # conversion helper
        def convert_value(profile, path, converter):
            value = profile
            for part in path[:-1]:
                if not isinstance(value, dict) or part not in value:
                    raise RuntimeError("%s is not contained in profile" % ".".join(path))
                value = value[part]

            if not isinstance(value, dict) or path[-1] not in value:
                raise RuntimeError("%s is not contained in profile" % ".".join(path))

            value[path[-1]] = converter(value[path[-1]])

        def validate_value(profile, path, validator):
            value = profile
            for part in path[:-1]:
                if not isinstance(value, dict) or part not in value:
                    raise RuntimeError("%s is not contained in profile" % ".".join(path))
                value = value[part]

            if not isinstance(value, dict) or path[-1] not in value:
                raise RuntimeError("%s is not contained in profile" % ".".join(path))

            return validator(value[path[-1]])

        # convert ints
        for path in (
            ("extruder", "count"),
            ("axes", "x", "speed"),
            ("axes", "y", "speed"),
            ("axes", "z", "speed"),
            ("axes", "e", "speed"),
        ):
            try:
                convert_value(profile, path, int)
            except Exception as e:
                self._logger.warning(
                    "Profile has invalid value for path {path!r}: {msg}".format(
                        path=".".join(path), msg=str(e)
                    )
                )
                return False

        # convert floats
        for path in (
            ("volume", "width"),
            ("volume", "depth"),
            ("volume", "height"),
            ("extruder", "nozzleDiameter"),
        ):
            try:
                convert_value(profile, path, float)
            except Exception as e:
                self._logger.warning(
                    "Profile has invalid value for path {path!r}: {msg}".format(
                        path=".".join(path), msg=str(e)
                    )
                )
                return False

        # convert booleans
        for path in (
            ("axes", "x", "inverted"),
            ("axes", "y", "inverted"),
            ("axes", "z", "inverted"),
            ("extruder", "sharedNozzle"),
        ):
            try:
                convert_value(profile, path, bool)
            except Exception as e:
                self._logger.warning(
                    "Profile has invalid value for path {path!r}: {msg}".format(
                        path=".".join(path), msg=str(e)
                    )
                )
                return False

        # validate volume size range
        for path in (
            ("volume", "width"),
            ("volume", "depth"),
            ("volume", "height"),
        ):
            if not validate_value(profile, path, lambda x: x > 0 and x < 10000):
                return False

        # validate extruder count range
        if not validate_value(
            profile, ("extruder", "count"), lambda x: x > 0 and x < 100
        ):
            return False

        # validate form factor
        if profile["volume"]["formFactor"] not in BedFormFactor.values():
            self._logger.warning(
                "Profile has invalid value volume.formFactor: {formFactor}".format(
                    formFactor=profile["volume"]["formFactor"]
                )
            )
            return False

        # validate origin type
        if profile["volume"]["origin"] not in BedOrigin.values():
            self._logger.warning(
                "Profile has invalid value in volume.origin: {origin}".format(
                    origin=profile["volume"]["origin"]
                )
            )
            return False

        # ensure origin and form factor combination is legal
        if (
            profile["volume"]["formFactor"] == BedFormFactor.CIRCULAR
            and not profile["volume"]["origin"] == BedOrigin.CENTER
        ):
            profile["volume"]["origin"] = BedOrigin.CENTER

        # force width and depth of volume to be identical for circular beds, with width being the reference
        if profile["volume"]["formFactor"] == BedFormFactor.CIRCULAR:
            profile["volume"]["depth"] = profile["volume"]["width"]

        # if we have a custom bounding box, validate it
        if profile["volume"]["custom_box"] and isinstance(
            profile["volume"]["custom_box"], dict
        ):
            if not len(profile["volume"]["custom_box"]):
                profile["volume"]["custom_box"] = False

            else:
                default_box = self._default_box_for_volume(profile["volume"])
                for prop, limiter in (
                    ("x_min", min),
                    ("y_min", min),
                    ("z_min", min),
                    ("x_max", max),
                    ("y_max", max),
                    ("z_max", max),
                ):
                    if (
                        prop not in profile["volume"]["custom_box"]
                        or profile["volume"]["custom_box"][prop] is None
                    ):
                        profile["volume"]["custom_box"][prop] = default_box[prop]
                    else:
                        value = profile["volume"]["custom_box"][prop]
                        try:
                            value = limiter(float(value), default_box[prop])
                            profile["volume"]["custom_box"][prop] = value
                        except Exception:
                            self._logger.warning(
                                "Profile has invalid value in volume.custom_box.{}: {!r}".format(
                                    prop, value
                                )
                            )
                            return False

                # make sure we actually do have a custom box and not just the same values as the
                # default box
                for prop in profile["volume"]["custom_box"]:
                    if profile["volume"]["custom_box"][prop] != default_box[prop]:
                        break
                else:
                    # exactly the same as the default box, remove custom box
                    profile["volume"]["custom_box"] = False

        # validate offsets
        offsets = []
        for offset in profile["extruder"]["offsets"]:
            if not len(offset) == 2:
                self._logger.warning(
                    "Profile has an invalid extruder.offsets entry: {entry!r}".format(
                        entry=offset
                    )
                )
                return False
            x_offset, y_offset = offset
            try:
                offsets.append((float(x_offset), float(y_offset)))
            except Exception:
                self._logger.warning(
                    "Profile has an extruder.offsets entry with non-float values: {entry!r}".format(
                        entry=offset
                    )
                )
                return False
        profile["extruder"]["offsets"] = offsets

        return profile

    @staticmethod
    def _default_box_for_volume(volume):
        if volume["origin"] == BedOrigin.CENTER:
            half_width = volume["width"] / 2
            half_depth = volume["depth"] / 2
            return {
                "x_min": -half_width,
                "x_max": half_width,
                "y_min": -half_depth,
                "y_max": half_depth,
                "z_min": 0.0,
                "z_max": volume["height"],
            }
        else:
            return {
                "x_min": 0.0,
                "x_max": volume["width"],
                "y_min": 0.0,
                "y_max": volume["depth"],
                "z_min": 0.0,
                "z_max": volume["height"],
            }
