from django.db.models import CASCADE, SET_NULL, BooleanField, CharField, DateTimeField, ForeignKey, JSONField, Model, TextField
from django.utils.translation import gettext_lazy as _

from apps.accounts.mixins import IdentifierMixin, TimeStampMixin
from apps.accounts.models import Organization, Role, User

class AgentConfig(IdentifierMixin, TimeStampMixin, Model):
    AGENT_TYPES = [
        ('curriculum', 'Curriculum Agent (CA)'),
        ('knowledge', 'Knowledge Agent (KA)'),
        ('assessment', 'Assessment Agent (AA)'),
        ('monitor', 'Progress Monitor Agent (PMA)'),
    ]

    organization = ForeignKey(Organization, on_delete=CASCADE, related_name='agent_configs', verbose_name=_("Organization"))
    role         = ForeignKey(Role, on_delete=CASCADE, related_name='agent_configs', verbose_name=_("Role"), null=True, blank=True)
    name         = CharField(max_length=255, verbose_name=_("Agent Name"))
    agent_type   = CharField(max_length=40, choices=AGENT_TYPES, verbose_name=_("Agent Type"))

    system_prompt    = TextField(verbose_name=_("System Prompt"), blank=True, default='')

    class Meta:
        verbose_name = _('Agent Config')
        verbose_name_plural = _('Agent Configs')

    def __str__(self):
        return f"{self.name} ({self.organization.name})"


class OnboardingFlow(IdentifierMixin, TimeStampMixin, Model):
    title = CharField(max_length=255, verbose_name=_("Flow Title"))
    role  = ForeignKey(Role, on_delete=CASCADE, related_name='flows', verbose_name=_("Role"))
    structure = JSONField(default=list, blank=True, verbose_name=_("Flow Structure"))
    is_active = BooleanField(default=True, verbose_name=_("Is Active"))

    class Meta:
        verbose_name = _('Onboarding Flow')
        verbose_name_plural = _('Onboarding Flows')

    def __str__(self):
        return self.title

class OnboardingSession(IdentifierMixin, TimeStampMixin, Model):
    STATUS_CHOICES = [
        ('active', 'Active'),
        ('completed', 'Completed'),
        ('paused', 'Paused'),
    ]

    user = ForeignKey(User, on_delete=CASCADE, related_name='onboarding_sessions', verbose_name=_("User"))
    role = ForeignKey(Role, on_delete=CASCADE, related_name='onboarding_sessions', verbose_name=_("Target Role"))
    flow = ForeignKey(OnboardingFlow, on_delete=SET_NULL, null=True, blank=True, related_name='sessions', verbose_name=_("Onboarding Flow"))

    status = CharField(max_length=20, choices=STATUS_CHOICES, default='active', verbose_name=_("Session Status"))
    state  = JSONField(default=dict, blank=True, verbose_name=_("Session State"))

    completed_at   = DateTimeField(null=True, blank=True, verbose_name=_("Completed At"))

    class Meta:
        verbose_name = _('Onboarding Session')
        verbose_name_plural = _('Onboarding Sessions')

    def __str__(self):
        return f"{self.user.email_address} - {self.role.name}"

class AgentInteractionLog(IdentifierMixin, TimeStampMixin, Model):
    SENDER_TYPES = [
        ('system', 'System'),
        ('ai', 'AI'),
        ('user', 'User'),
        ('tool', 'Tool Output'),
    ]

    session = ForeignKey(OnboardingSession, on_delete=CASCADE, related_name='logs', verbose_name=_("Session"))
    agent_config = ForeignKey(AgentConfig, on_delete=CASCADE, null=True, blank=True, verbose_name=_("Agent Config"))
    sender_type = CharField(max_length=20, choices=SENDER_TYPES, verbose_name=_("Sender Type"))
    content = TextField(verbose_name=_("Message Content"))
    tool_call_metadata = JSONField(default=dict, blank=True, verbose_name=_("Tool Call Metadata"))

    class Meta:
        verbose_name = _('Interaction Log')
        verbose_name_plural = _('Interaction Logs')
        ordering = ['created_at']

    def __str__(self):
        return f"{self.sender_type} in {self.session.uuid}"