import uuid

from django.utils import timezone
from django.utils.translation import gettext_lazy as _
from rest_framework import serializers

from assets.const import Protocol
from common.serializers.fields import EncryptedField
from common.utils import date_expired_default

__all__ = [
    'AnnouncementSettingSerializer', 'OpsSettingSerializer', 'VaultSettingSerializer',
    'HashicorpKVSerializer', 'AzureKVSerializer', 'TicketSettingSerializer',
    'ChatAISettingSerializer', 'VirtualAppSerializer',
]


class AnnouncementSerializer(serializers.Serializer):
    ID = serializers.CharField(required=False, allow_blank=True, allow_null=True)
    SUBJECT = serializers.CharField(required=True, max_length=1024, label=_("Subject"))
    CONTENT = serializers.CharField(label=_("Content"))
    LINK = serializers.URLField(
        required=False, allow_null=True, allow_blank=True,
        label=_("More Link"), default='',
    )
    DATE_START = serializers.DateTimeField(default=timezone.now, label=_("Date start"))
    DATE_END = serializers.DateTimeField(default=date_expired_default, label=_("Date end"))

    def to_representation(self, instance):
        defaults = {'ID': '', 'SUBJECT': '', 'CONTENT': '', 'LINK': '', 'ENABLED': False}
        data = {**defaults, **instance}
        return super().to_representation(data)

    def to_internal_value(self, data):
        data['ID'] = str(uuid.uuid4())
        return super().to_internal_value(data)


class AnnouncementSettingSerializer(serializers.Serializer):
    PREFIX_TITLE = _('Announcement')

    ANNOUNCEMENT_ENABLED = serializers.BooleanField(label=_('Announcement'), default=True)
    ANNOUNCEMENT = AnnouncementSerializer(label=_("Announcement"))


class BaseVaultSettingSerializer(serializers.Serializer):

    def validate(self, data):
        from accounts.signal_handlers import vault_pub_sub
        data = super().validate(data)
        vault_pub_sub.publish('vault')
        return data


class VaultSettingSerializer(BaseVaultSettingSerializer, serializers.Serializer):
    PREFIX_TITLE = _('Vault')

    VAULT_ENABLED = serializers.BooleanField(
        required=False, label=_('Vault'), read_only=True
    )
    VAULT_BACKEND = serializers.CharField(
        max_length=16, required=False, label=_('Vault provider'), read_only=True
    )
    HISTORY_ACCOUNT_CLEAN_LIMIT = serializers.IntegerField(
        default=999, max_value=999, min_value=1,
        required=False, label=_('Record limit'),
        help_text=_(
            'If the specific value is less than 999 (default), '
            'the system will automatically perform a task every night: '
            'check and delete historical accounts that exceed the predetermined number. '
            'If the value reaches or exceeds 999 (default), '
            'no historical account deletion will be performed'
        )
    )


class HashicorpKVSerializer(BaseVaultSettingSerializer, serializers.Serializer):
    PREFIX_TITLE = _('HCP Vault')
    VAULT_HCP_HOST = serializers.CharField(
        max_length=256, allow_blank=True, required=False, label=_('Host')
    )
    VAULT_HCP_TOKEN = EncryptedField(
        max_length=256, allow_blank=True, required=False, label=_('Token'), default=''
    )
    VAULT_HCP_MOUNT_POINT = serializers.CharField(
        max_length=256, allow_blank=True, required=False, label=_('Mount Point')
    )


class AzureKVSerializer(BaseVaultSettingSerializer, serializers.Serializer):
    PREFIX_TITLE = _('Azure Key Vault')
    VAULT_AZURE_HOST = serializers.CharField(
        max_length=256, allow_blank=True, required=False, label=_('Host')
    )
    VAULT_AZURE_CLIENT_ID = serializers.CharField(
        max_length=128, allow_blank=True, required=False, label=_('Client ID')
    )
    VAULT_AZURE_CLIENT_SECRET = EncryptedField(
        max_length=4096, allow_blank=True, required=False, label=_('Client Secret'), default=''
    )
    VAULT_AZURE_TENANT_ID = serializers.CharField(
        max_length=128, allow_blank=True, required=False, label=_('Tenant ID')
    )


class ChatAISettingSerializer(serializers.Serializer):
    PREFIX_TITLE = _('Chat AI')
    API_MODEL = Protocol.gpt_protocols()[Protocol.chatgpt]['setting']['api_mode']
    GPT_MODEL_CHOICES = API_MODEL['choices']
    GPT_MODEL_DEFAULT = API_MODEL['default']

    CHAT_AI_ENABLED = serializers.BooleanField(
        required=False, label=_('Chat AI')
    )
    GPT_BASE_URL = serializers.CharField(
        allow_blank=True, required=False, label=_('GPT Base URL'),
        help_text=_('The base URL of the GPT service. For example: https://api.openai.com/v1')
    )
    GPT_API_KEY = EncryptedField(
        allow_blank=True, required=False, label=_('API Key'),
    )
    GPT_PROXY = serializers.CharField(
        allow_blank=True, required=False, label=_('Proxy'),
        help_text=_('The proxy server address of the GPT service. For example: http://ip:port')
    )
    GPT_MODEL = serializers.ChoiceField(
        default=GPT_MODEL_DEFAULT, choices=GPT_MODEL_CHOICES, label=_("GPT Model"), required=False,
    )


class TicketSettingSerializer(serializers.Serializer):
    PREFIX_TITLE = _('Ticket')

    TICKETS_ENABLED = serializers.BooleanField(required=False, default=True, label=_("Ticket"))
    TICKETS_DIRECT_APPROVE = serializers.BooleanField(
        required=False, default=False, label=_("Approval without login"),
        help_text=_('Allow direct approval ticket without login')
    )
    TICKET_AUTHORIZE_DEFAULT_TIME = serializers.IntegerField(
        min_value=1, max_value=999999, required=False,
        label=_("Period"),
        help_text=_("The default authorization time period when applying for assets via a ticket")
    )
    TICKET_AUTHORIZE_DEFAULT_TIME_UNIT = serializers.ChoiceField(
        choices=[('day', _("day")), ('hour', _("hour"))],
        label=_("Unit"), required=False, help_text=_("The unit of period")
    )


class OpsSettingSerializer(serializers.Serializer):
    PREFIX_TITLE = _('Feature')

    SECURITY_COMMAND_EXECUTION = serializers.BooleanField(
        required=False, label=_('Adhoc'),
        help_text=_('Allow users to execute batch commands in the Workbench - Job Center - Adhoc')
    )
    SECURITY_COMMAND_BLACKLIST = serializers.ListField(
        child=serializers.CharField(max_length=1024, ),
        label=_('Command blacklist'),
        help_text=_("Command blacklist in Adhoc")
    )


class VirtualAppSerializer(serializers.Serializer):
    PREFIX_TITLE = _('Virtual app')

    VIRTUAL_APP_ENABLED = serializers.BooleanField(
        required=False, label=_('Virtual App'),
        help_text=_(
            'Virtual applications, you can use the Linux operating system as an application server '
            'in remote applications.'
        )
    )