from django.db import models
from django.urls import reverse_lazy, reverse
from django.utils import timezone


class Employee(models.Model):
    class Meta:
        ordering = ('-hire_date',)

    first_name = models.CharField(max_length=64)
    last_name = models.CharField(max_length=64)
    hire_date = models.DateField()
    title = models.CharField(max_length=64, blank=True, null=True)
    department = models.CharField(max_length=64, blank=True, null=True)
    manager = models.CharField(max_length=64, blank=True, null=True)
    initial_comments = models.TextField(blank=True, null=True)
    archived = models.BooleanField(default=False)

    @property
    def full_name(self):
        return f"{self.first_name} {self.last_name}"


    def __str__(self):
        return self.full_name

    def get_absolute_url(self):
        return reverse('employee-detail', kwargs={'pk': self.pk})


class LogEntry(models.Model):
    class Meta:
        ordering = ('-created_at',)

    employee = models.ForeignKey(Employee, on_delete=models.CASCADE)
    notes = models.CharField(max_length=500)

    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

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

    def get_absolute_url(self):
        return reverse('todo-detail', kwargs={'pk': self.employee.pk, 'entry_pk': self.pk})


class Todo(models.Model):
    employee = models.ForeignKey(Employee, on_delete=models.CASCADE)
    description = models.CharField(max_length=64)

    completed = models.BooleanField(default=False)
    completed_at = models.DateTimeField(blank=True, null=True)

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

    def get_absolute_url(self):
        return reverse('todo-detail', kwargs={'pk': self.employee.pk, 'todo_pk': self.pk})


class Event(models.Model):
    class Meta:
        ordering = ('date', 'time')

    name = models.CharField(max_length=64)
    date = models.DateField()
    time = models.TimeField(blank=True, null=True)
    employee = models.ForeignKey(Employee, on_delete=models.CASCADE, blank=True, null=True)

    def __str__(self):
        return f"{self.description} on {self.date} @ {self.time}"

    def get_absolute_url(self):
        return reverse('event-detail', kwargs={'pk': self.pk})