from django.db import models


class BoardQuerySet(models.QuerySet):
    def for_user(self, user):
        return self.filter(owner=user)


class Board(models.Model):
    owner = models.ForeignKey(
        "accounts.CustomUser",
        on_delete=models.CASCADE,
        related_name="boards",
    )
    project = models.ForeignKey(
        "projects.Project",
        null=True,
        blank=True,
        on_delete=models.CASCADE,
        related_name="boards",
    )
    name = models.CharField(max_length=255, default="My Board")
    created_at = models.DateTimeField(auto_now_add=True)

    objects = BoardQuerySet.as_manager()

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


class Column(models.Model):
    board = models.ForeignKey(Board, on_delete=models.CASCADE, related_name="columns")
    name = models.CharField(max_length=100)
    order = models.PositiveIntegerField(default=0)

    class Meta:
        ordering = ["order"]

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


class Card(models.Model):
    class Priority(models.TextChoices):
        LOW = "low", "Low"
        MEDIUM = "medium", "Medium"
        HIGH = "high", "High"
        URGENT = "urgent", "Urgent"

    column = models.ForeignKey(Column, on_delete=models.CASCADE, related_name="cards")
    title = models.CharField(max_length=255)
    description = models.TextField(blank=True)
    priority = models.CharField(
        max_length=10, choices=Priority.choices, default=Priority.MEDIUM
    )
    assignee = models.ForeignKey(
        "accounts.CustomUser",
        null=True,
        blank=True,
        on_delete=models.SET_NULL,
        related_name="assigned_cards",
    )
    start_date = models.DateField(null=True, blank=True)
    end_date = models.DateField(null=True, blank=True)
    due_date = models.DateField(null=True, blank=True)
    deadline_notification = models.BooleanField(default=False)
    order = models.PositiveIntegerField(default=0)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        ordering = ["order"]

    def __str__(self):
        return self.title


class CardComment(models.Model):
    card = models.ForeignKey(Card, on_delete=models.CASCADE, related_name="comments")
    author = models.ForeignKey(
        "accounts.CustomUser",
        on_delete=models.CASCADE,
        related_name="card_comments",
    )
    body = models.TextField()
    parent = models.ForeignKey(
        "self",
        null=True,
        blank=True,
        on_delete=models.CASCADE,
        related_name="replies",
    )
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        ordering = ["created_at"]

    def __str__(self):
        return f"Comment by {self.author} on {self.card}"