import copy
from datetime import datetime, timedelta
from dateutil.tz import tzutc
from flask import current_app as app, g
from marshmallow import Schema as MarshmallowSchema, ValidationError, fields as f, validates_schema
from marshmallow.fields import Boolean, DateTime, Decimal, Float, Integer, Nested, String, \
    TimeDelta, UUID
from marshmallow.validate import Length, OneOf, Range
from sqlalchemy.util import OrderedSet
from teal.enums import Country, Currency, Subdivision
from teal.marshmallow import EnumField, IP, SanitizedStr, URL, Version
from teal.resource import Schema

from ereuse_devicehub.marshmallow import NestedOn
from ereuse_devicehub.resources import enums
from ereuse_devicehub.resources.action import models as m
from ereuse_devicehub.resources.agent import schemas as s_agent
from ereuse_devicehub.resources.device import schemas as s_device
from ereuse_devicehub.resources.enums import AppearanceRange, BiosAccessRange, FunctionalityRange, \
    PhysicalErasureMethod, R_POSITIVE, RatingRange, \
    Severity, SnapshotSoftware, TestDataStorageLength
from ereuse_devicehub.resources.models import STR_BIG_SIZE, STR_SIZE
from ereuse_devicehub.resources.schemas import Thing
from ereuse_devicehub.resources.user import schemas as s_user
from ereuse_devicehub.resources.user.models import User


class Action(Thing):
    __doc__ = m.Action.__doc__
    id = UUID(dump_only=True)
    name = SanitizedStr(default='',
                        validate=Length(max=STR_BIG_SIZE),
                        description=m.Action.name.comment)
    closed = Boolean(missing=True, description=m.Action.closed.comment)
    severity = EnumField(Severity, description=m.Action.severity.comment)
    description = SanitizedStr(default='', description=m.Action.description.comment)
    start_time = DateTime(data_key='startTime', description=m.Action.start_time.comment)
    end_time = DateTime(data_key='endTime', description=m.Action.end_time.comment)
    snapshot = NestedOn('Snapshot', dump_only=True)
    agent = NestedOn(s_agent.Agent, description=m.Action.agent_id.comment)
    author = NestedOn(s_user.User, dump_only=True, exclude=('token',))
    components = NestedOn(s_device.Component, dump_only=True, many=True)
    parent = NestedOn(s_device.Computer, dump_only=True, description=m.Action.parent_id.comment)
    url = URL(dump_only=True, description=m.Action.url.__doc__)

    @validates_schema
    def validate_times(self, data: dict):
        unix_time = datetime.fromisoformat("1970-01-02 00:00:00+00:00")
        if 'end_time' in data and data['end_time'] < unix_time:
            data['end_time'] = unix_time

        if 'start_time' in data and data['start_time'] < unix_time:
            data['start_time'] = unix_time


class ActionWithOneDevice(Action):
    __doc__ = m.ActionWithOneDevice.__doc__
    device = NestedOn(s_device.Device, only_query='id')


class ActionWithMultipleDevices(Action):
    __doc__ = m.ActionWithMultipleDevices.__doc__
    devices = NestedOn(s_device.Device,
                       many=True,
                       required=True,  # todo test ensuring len(devices) >= 1
                       only_query='id',
                       collection_class=OrderedSet)


class Add(ActionWithOneDevice):
    __doc__ = m.Add.__doc__


class Remove(ActionWithOneDevice):
    __doc__ = m.Remove.__doc__


class Allocate(ActionWithMultipleDevices):
    __doc__ = m.Allocate.__doc__
    start_time = DateTime(data_key='startTime', required=True,
                          description=m.Action.start_time.comment)
    end_time = DateTime(data_key='endTime', required=False,
                        description=m.Action.end_time.comment)
    final_user_code = SanitizedStr(data_key="finalUserCode",
                                   validate=Length(min=1, max=STR_BIG_SIZE),
                                   required=False,
                                   description='This is a internal code for mainteing the secrets of the \
                                               personal datas of the new holder')
    transaction = SanitizedStr(validate=Length(min=1, max=STR_BIG_SIZE),
                        required=False,
                        description='The code used from the owner for \
                                relation with external tool.')
    end_users = Integer(data_key='endUsers', validate=[Range(min=1, error="Value must be greater than 0")])

    @validates_schema
    def validate_allocate(self, data: dict):
        txt = "You need to allocate for a day before today"
        delay = timedelta(days=1)
        today = datetime.now().replace(tzinfo=tzutc()) + delay
        start_time = data['start_time'].replace(tzinfo=tzutc())
        if start_time > today:
            raise ValidationError(txt)

        txt = "You need deallocate before allocate this device again"
        for device in data['devices']:
            if device.allocated:
                raise ValidationError(txt)

            device.allocated = True


class Deallocate(ActionWithMultipleDevices):
    __doc__ = m.Deallocate.__doc__
    start_time = DateTime(data_key='startTime', required=True,
                          description=m.Action.start_time.comment)
    transaction = SanitizedStr(validate=Length(min=1, max=STR_BIG_SIZE),
                        required=False,
                        description='The code used from the owner for \
                                relation with external tool.')

    @validates_schema
    def validate_deallocate(self, data: dict):
        txt = "You need to deallocate for a day before today"
        delay = timedelta(days=1)
        today = datetime.now().replace(tzinfo=tzutc()) + delay
        start_time = data['start_time'].replace(tzinfo=tzutc())
        if start_time > today:
            raise ValidationError(txt)

        txt = "Sorry some of this devices are actually deallocate"
        for device in data['devices']:
            if not device.allocated:
                raise ValidationError(txt)

            device.allocated = False


class EraseBasic(ActionWithOneDevice):
    __doc__ = m.EraseBasic.__doc__
    steps = NestedOn('Step', many=True)
    standards = f.List(EnumField(enums.ErasureStandards), dump_only=True)
    certificate = URL(dump_only=True)


class EraseSectors(EraseBasic):
    __doc__ = m.EraseSectors.__doc__


class ErasePhysical(EraseBasic):
    __doc__ = m.ErasePhysical.__doc__
    method = EnumField(PhysicalErasureMethod, description=PhysicalErasureMethod.__doc__)


class Step(Schema):
    __doc__ = m.Step.__doc__
    type = String(description='Only required when it is nested.')
    start_time = DateTime(required=True, data_key='startTime')
    end_time = DateTime(required=True, data_key='endTime')
    severity = EnumField(Severity, description=m.Action.severity.comment)


class StepZero(Step):
    __doc__ = m.StepZero.__doc__


class StepRandom(Step):
    __doc__ = m.StepRandom.__doc__


class Benchmark(ActionWithOneDevice):
    __doc__ = m.Benchmark.__doc__
    elapsed = TimeDelta(precision=TimeDelta.SECONDS, required=True)


class BenchmarkDataStorage(Benchmark):
    __doc__ = m.BenchmarkDataStorage.__doc__
    read_speed = Float(required=True, data_key='readSpeed')
    write_speed = Float(required=True, data_key='writeSpeed')


class BenchmarkWithRate(Benchmark):
    __doc__ = m.BenchmarkWithRate.__doc__
    rate = Float(required=True)


class BenchmarkProcessor(BenchmarkWithRate):
    __doc__ = m.BenchmarkProcessor.__doc__


class BenchmarkProcessorSysbench(BenchmarkProcessor):
    __doc__ = m.BenchmarkProcessorSysbench.__doc__


class BenchmarkRamSysbench(BenchmarkWithRate):
    __doc__ = m.BenchmarkRamSysbench.__doc__


class BenchmarkGraphicCard(BenchmarkWithRate):
    __doc__ = m.BenchmarkGraphicCard.__doc__


class Test(ActionWithOneDevice):
    __doc__ = m.Test.__doc__


class MeasureBattery(Test):
    __doc__ = m.MeasureBattery.__doc__
    size = Integer(required=True, description=m.MeasureBattery.size.comment)
    voltage = Integer(required=True, description=m.MeasureBattery.voltage.comment)
    cycle_count = Integer(data_key='cycleCount', description=m.MeasureBattery.cycle_count.comment)
    health = EnumField(enums.BatteryHealth, description=m.MeasureBattery.health.comment)


class TestDataStorage(Test):
    __doc__ = m.TestDataStorage.__doc__
    elapsed = TimeDelta(precision=TimeDelta.SECONDS, required=True)
    length = EnumField(TestDataStorageLength, required=True)
    status = SanitizedStr(lower=True, validate=Length(max=STR_SIZE), required=True)
    lifetime = TimeDelta(precision=TimeDelta.HOURS)
    assessment = Boolean()
    reallocated_sector_count = Integer(data_key='reallocatedSectorCount')
    power_cycle_count = Integer(data_key='powerCycleCount')
    reported_uncorrectable_errors = Integer(data_key='reportedUncorrectableErrors')
    command_timeout = Integer(data_key='commandTimeout')
    current_pending_sector_count = Integer(data_key='currentPendingSectorCount')
    offline_uncorrectable = Integer(data_key='offlineUncorrectable')
    remaining_lifetime_percentage = Integer(data_key='remainingLifetimePercentage')


class StressTest(Test):
    __doc__ = m.StressTest.__doc__
    elapsed = TimeDelta(precision=TimeDelta.SECONDS, required=True)


class TestAudio(Test):
    __doc__ = m.TestAudio.__doc__
    speaker = Boolean(description=m.TestAudio._speaker.comment)
    microphone = Boolean(description=m.TestAudio._microphone.comment)


class TestConnectivity(Test):
    __doc__ = m.TestConnectivity.__doc__


class TestCamera(Test):
    __doc__ = m.TestCamera.__doc__


class TestKeyboard(Test):
    __doc__ = m.TestKeyboard.__doc__


class TestTrackpad(Test):
    __doc__ = m.TestTrackpad.__doc__


class TestBios(Test):
    __doc__ = m.TestBios.__doc__
    bios_power_on = Boolean()
    access_range = EnumField(BiosAccessRange, data_key='accessRange')


class VisualTest(Test):
    __doc__ = m.VisualTest.__doc__
    appearance_range = EnumField(AppearanceRange, data_key='appearanceRange')
    functionality_range = EnumField(FunctionalityRange,
                                    data_key='functionalityRange')
    labelling = Boolean()


class Rate(ActionWithOneDevice):
    __doc__ = m.Rate.__doc__
    rating = Integer(validate=Range(*R_POSITIVE),
                     dump_only=True,
                     description=m.Rate._rating.comment)
    version = Version(dump_only=True,
                      description=m.Rate.version.comment)
    appearance = Integer(validate=Range(enums.R_NEGATIVE),
                         dump_only=True,
                         description=m.Rate._appearance.comment)
    functionality = Integer(validate=Range(enums.R_NEGATIVE),
                            dump_only=True,
                            description=m.Rate._functionality.comment)
    rating_range = EnumField(RatingRange,
                             dump_only=True,
                             data_key='ratingRange',
                             description=m.Rate.rating_range.__doc__)


class RateComputer(Rate):
    __doc__ = m.RateComputer.__doc__
    processor = Float(dump_only=True)
    ram = Float(dump_only=True)
    data_storage = Float(dump_only=True, data_key='dataStorage')
    graphic_card = Float(dump_only=True, data_key='graphicCard')

    data_storage_range = EnumField(RatingRange, dump_only=True, data_key='dataStorageRange')
    ram_range = EnumField(RatingRange, dump_only=True, data_key='ramRange')
    processor_range = EnumField(RatingRange, dump_only=True, data_key='processorRange')
    graphic_card_range = EnumField(RatingRange, dump_only=True, data_key='graphicCardRange')


class Price(ActionWithOneDevice):
    __doc__ = m.Price.__doc__
    currency = EnumField(Currency, required=True, description=m.Price.currency.comment)
    price = Decimal(places=m.Price.SCALE,
                    rounding=m.Price.ROUND,
                    required=True,
                    description=m.Price.price.comment)
    version = Version(dump_only=True, description=m.Price.version.comment)
    rating = NestedOn(Rate, dump_only=True, description=m.Price.rating_id.comment)


class EreusePrice(Price):
    __doc__ = m.EreusePrice.__doc__

    class Service(MarshmallowSchema):
        class Type(MarshmallowSchema):
            amount = Float()
            percentage = Float()

        standard = Nested(Type)
        warranty2 = Nested(Type)

    warranty2 = Float()
    refurbisher = Nested(Service)
    retailer = Nested(Service)
    platform = Nested(Service)


class Install(ActionWithOneDevice):
    __doc__ = m.Install.__doc__
    name = SanitizedStr(validate=Length(min=4, max=STR_BIG_SIZE),
                        required=True,
                        description='The name of the OS installed.')
    elapsed = TimeDelta(precision=TimeDelta.SECONDS, required=True)
    address = Integer(validate=OneOf({8, 16, 32, 64, 128, 256}))


class Snapshot(ActionWithOneDevice):
    __doc__ = m.Snapshot.__doc__
    """
    The Snapshot updates the state of the device with information about
    its components and actions performed at them.

    See docs for more info.
    """
    uuid = UUID()
    software = EnumField(SnapshotSoftware,
                         required=True,
                         description='The software that generated this Snapshot.')
    version = Version(required=True, description='The version of the software.')
    actions = NestedOn(Action, many=True, dump_only=True)
    elapsed = TimeDelta(precision=TimeDelta.SECONDS)
    components = NestedOn(s_device.Component,
                          many=True,
                          description='A list of components that are inside of the device'
                                      'at the moment of this Snapshot.'
                                      'Order is preserved, so the component num 0 when'
                                      'submitting is the component num 0 when returning it back.')

    @validates_schema
    def validate_workbench_version(self, data: dict):
        if data['software'] == SnapshotSoftware.Workbench:
            if data['version'] < app.config['MIN_WORKBENCH']:
                raise ValidationError(
                    'Min. supported Workbench version is '
                    '{} but yours is {}.'.format(app.config['MIN_WORKBENCH'], data['version']),
                    field_names=['version']
                )

    @validates_schema
    def validate_components_only_workbench(self, data: dict):
        if (data['software'] != SnapshotSoftware.Workbench) and (data['software'] != SnapshotSoftware.WorkbenchAndroid):
            if data.get('components', None) is not None:
                raise ValidationError('Only Workbench can add component info',
                                      field_names=['components'])

    @validates_schema
    def validate_only_workbench_fields(self, data: dict):
        """Ensures workbench has ``elapsed`` and ``uuid`` and no others."""
        # todo test
        if data['software'] == SnapshotSoftware.Workbench:
            if not data.get('uuid', None):
                raise ValidationError('Snapshots from Workbench and WorkbenchAndroid must have uuid',
                                      field_names=['uuid'])
            if data.get('elapsed', None) is None:
                raise ValidationError('Snapshots from Workbench must have elapsed',
                                      field_names=['elapsed'])
        elif data['software'] == SnapshotSoftware.WorkbenchAndroid:
            if not data.get('uuid', None):
                raise ValidationError('Snapshots from Workbench and WorkbenchAndroid must have uuid',
                                      field_names=['uuid'])
        else:
            if data.get('uuid', None):
                raise ValidationError('Only Snapshots from Workbench or WorkbenchAndroid can have uuid',
                                      field_names=['uuid'])
            if data.get('elapsed', None):
                raise ValidationError('Only Snapshots from Workbench can have elapsed',
                                      field_names=['elapsed'])


class ToRepair(ActionWithMultipleDevices):
    __doc__ = m.ToRepair.__doc__


class Repair(ActionWithMultipleDevices):
    __doc__ = m.Repair.__doc__


class Ready(ActionWithMultipleDevices):
    __doc__ = m.Ready.__doc__


class ToPrepare(ActionWithMultipleDevices):
    __doc__ = m.ToPrepare.__doc__


class Prepare(ActionWithMultipleDevices):
    __doc__ = m.Prepare.__doc__


class Live(ActionWithOneDevice):
    __doc__ = m.Live.__doc__
    """
    The Snapshot updates the state of the device with information about
    its components and actions performed at them.

    See docs for more info.
    """
    uuid = UUID()
    software = EnumField(SnapshotSoftware,
                         required=True,
                         description='The software that generated this Snapshot.')
    version = Version(required=True, description='The version of the software.')
    final_user_code = SanitizedStr(data_key="finalUserCode", dump_only=True)
    licence_version = Version(required=True, description='The version of the software.')
    components = NestedOn(s_device.Component,
                          many=True,
                          description='A list of components that are inside of the device'
                                      'at the moment of this Snapshot.'
                                      'Order is preserved, so the component num 0 when'
                                      'submitting is the component num 0 when returning it back.')
    usage_time_allocate = TimeDelta(data_key='usageTimeAllocate', required=False,
                                    precision=TimeDelta.HOURS, dump_only=True)


class Organize(ActionWithMultipleDevices):
    __doc__ = m.Organize.__doc__


class Reserve(Organize):
    __doc__ = m.Reserve.__doc__


class CancelReservation(Organize):
    __doc__ = m.CancelReservation.__doc__


class Confirm(ActionWithMultipleDevices):
    __doc__ = m.Confirm.__doc__
    revoke = Boolean(required=False, description="""If you want revoke an other confirmation""")
    action = NestedOn('Action', only_query='id')


    @validates_schema
    def validate_confirm(self, data: dict):
        if data.get('revoke'):
            return data

        acceptances = copy.copy(data['action'].acceptances)
        acceptances.reverse()
        for ac in acceptances:
            if ac.user == g.user and ac.revoke:
                return data

            if ac.user == g.user:
                txt = "you are confirmed this action before"
                raise ValidationError(txt)

    @validates_schema
    def validate_revoke(self, data: dict):
        if not data.get('revoke'):
            return data

        acceptances = copy.copy(data['action'].acceptances)
        acceptances.reverse()
        for ac in acceptances:
            if ac.user == g.user and not ac.revoke:
                return data

            if ac.user == g.user and ac.revoke:
                txt = "you are revoke this action before"
                raise ValidationError(txt)


class Trade(ActionWithMultipleDevices):
    __doc__ = m.Trade.__doc__
    document_id = SanitizedStr(validate=Length(max=STR_SIZE), data_key='documentID', required=False)
    date = DateTime(data_key='date', required=False)
    price = Float(required=False, data_key='price')
    user_to_id = SanitizedStr(validate=Length(max=STR_SIZE), data_key='userTo', missing='',
                              required=False)
    user_from_id = SanitizedStr(validate=Length(max=STR_SIZE), data_key='userFrom', missing='',
                                required=False)
    code = SanitizedStr(validate=Length(max=STR_SIZE), data_key='code', required=False)
    confirm = Boolean(missing=False, description="""If you need confirmation of the user
            you need actevate this field""")
    lot = NestedOn('Lot',
                   many=False,
                   required=True,
                   only_query='id')

    @validates_schema
    def validate_lot(self, data: dict):
        data['devices'] = data['lot'].devices

    @validates_schema
    def validate_user_to_id(self, data: dict):
        """
        - if user_to exist
            * confirmation
            * without confirmation
        - if user_to don't exist
            * without confirmation

        """
        if data['user_to_id']:
            user_to = User.query.filter_by(email=data['user_to_id']).one()
            data['user_to_id'] = user_to.id
            data['user_to'] = user_to
        else:
            data['confirm'] = False

    @validates_schema
    def validate_user_from_id(self, data: dict):
        """
        - if user_from exist
            * confirmation
            * without confirmation
        - if user_from don't exist
            * without confirmation

        """
        if not (data['user_from_id'] or data['user_to_id']):
            txt = "you need one user from or user to for to do a offer"
            raise ValidationError(txt)

        if data['user_from_id']:
            user_from = User.query.filter_by(email=data['user_from_id']).one()

            # are you property of this devices?
            txt = "Some of this devices don't are of this from user"
            for x in data['devices']:
                if not x.owner == user_from:
                    raise ValidationError(txt)

            data['user_from_id'] = user_from.id
            data['user_from'] = user_from
        else:
            data['confirm'] = False

    @validates_schema
    def validate_code(self, data: dict):
        """If the user not exist, you need a code to be able to do the traceability"""
        if data['user_from_id'] and data['user_to_id']:
            return

        if not data.get('code'):
            txt = "you need a code to be able to do the traceability"
            raise ValidationError(txt)


class InitTransfer(Trade):
    __doc__ = m.InitTransfer.__doc__


class Sell(Trade):
    __doc__ = m.Sell.__doc__


class Donate(Trade):
    __doc__ = m.Donate.__doc__


class Rent(Trade):
    __doc__ = m.Rent.__doc__


class MakeAvailable(ActionWithMultipleDevices):
    __doc__ = m.MakeAvailable.__doc__


class CancelTrade(Trade):
    __doc__ = m.CancelTrade.__doc__


class ToDisposeProduct(Trade):
    __doc__ = m.ToDisposeProduct.__doc__


class DisposeProduct(Trade):
    __doc__ = m.DisposeProduct.__doc__


class TransferOwnershipBlockchain(Trade):
    __doc__ = m.TransferOwnershipBlockchain.__doc__


class Migrate(ActionWithMultipleDevices):
    __doc__ = m.Migrate.__doc__
    other = URL()


class MigrateTo(Migrate):
    __doc__ = m.MigrateTo.__doc__


class MigrateFrom(Migrate):
    __doc__ = m.MigrateFrom.__doc__