from django.conf import settings
from django.db import models

from apps.core.models import TimeStampedModel


class TicketStatus(models.TextChoices):
    OPEN = "open", "Open"
    IN_PROGRESS = "in_progress", "In progress"
    WAITING = "waiting", "Waiting on investor"
    RESOLVED = "resolved", "Resolved"
    CLOSED = "closed", "Closed"


class TicketPriority(models.TextChoices):
    LOW = "low", "Low"
    NORMAL = "normal", "Normal"
    HIGH = "high", "High"
    URGENT = "urgent", "Urgent"


class SupportTicket(TimeStampedModel):
    reference = models.CharField(max_length=32, unique=True)
    investor = models.ForeignKey(
        "investors.Investor",
        null=True,
        blank=True,
        on_delete=models.SET_NULL,
        related_name="tickets",
    )
    created_by = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        on_delete=models.CASCADE,
        related_name="support_tickets",
    )
    assigned_to = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        null=True,
        blank=True,
        on_delete=models.SET_NULL,
        related_name="assigned_tickets",
    )
    subject = models.CharField(max_length=180)
    status = models.CharField(max_length=20, choices=TicketStatus.choices, default=TicketStatus.OPEN)
    priority = models.CharField(max_length=16, choices=TicketPriority.choices, default=TicketPriority.NORMAL)
    project = models.ForeignKey("projects.Project", null=True, blank=True, on_delete=models.SET_NULL)

    class Meta:
        ordering = ["-created_at"]

    def __str__(self):
        return f"{self.reference} · {self.subject}"


class TicketMessage(TimeStampedModel):
    ticket = models.ForeignKey(SupportTicket, on_delete=models.CASCADE, related_name="messages")
    author = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
    body = models.TextField()
    is_internal = models.BooleanField(default=False)

    class Meta:
        ordering = ["created_at"]