from django.db import models
from django.contrib.auth.models import User

class Intent(models.Model):
    name = models.CharField(max_length=100)
    icon = models.CharField(max_length=50, blank=True, help_text="Bootstrap icon class name")

    def __str__(self):
        return str(self.name)

class ValueTag(models.Model):
    name = models.CharField(max_length=100)

    def __str__(self):
        return str(self.name)

class Profile(models.Model):
    TRANSITION_CHOICES = [
        ('none', 'Stable'),
        ('post-divorce', 'Post-Divorce'),
        ('relocating', 'Relocating'),
        ('career-change', 'Career Change'),
        ('new-in-town', 'New in Town'),
    ]

    user = models.OneToOneField(User, on_delete=models.CASCADE, related_name='profile')
    professional_headline = models.CharField(max_length=255, blank=True)
    transition_status = models.CharField(max_length=50, choices=TRANSITION_CHOICES, default='none')
    bio = models.TextField(blank=True)
    location_city = models.CharField(max_length=100, blank=True)
    intents = models.ManyToManyField(Intent, blank=True)
    value_tags = models.ManyToManyField(ValueTag, blank=True)
    avatar = models.ImageField(upload_to='avatars/', blank=True, null=True)
    
    # Momentum & Engagement
    accountability_streak = models.IntegerField(default=0)
    
    # Auth & Security
    is_email_verified = models.BooleanField(default=False)
    two_factor_enabled = models.BooleanField(default=False)
    onboarding_completed = models.BooleanField(default=False)
    
    # Multitenancy (Future Proofing)
    organization_id = models.IntegerField(null=True, blank=True)

    @property
    def get_avatar_url(self):
        if self.avatar and hasattr(self.avatar, 'url'):
            return self.avatar.url
        return f"https://i.pravatar.cc/150?u={self.user.username}"

    @property
    def connection_count(self):
        return Connection.objects.filter(models.Q(user1=self.user) | models.Q(user2=self.user)).count()

    @property
    def following_count(self):
        return Follow.objects.filter(follower=self.user).count()

    @property
    def followers_count(self):
        return Follow.objects.filter(followed=self.user).count()

    @property
    def events_attended_count(self):
        return self.user.attending_events.count()

    @property
    def profile_completion_percentage(self):
        steps = 0
        total_steps = 5
        if self.professional_headline: steps += 1
        if self.bio: steps += 1
        if self.location_city: steps += 1
        if self.intents.exists(): steps += 1
        if self.avatar: steps += 1
        return int((steps / total_steps) * 100)

    def __str__(self):
        return f"{self.user.username}'s Profile"

class Connection(models.Model):
    user1 = models.ForeignKey(User, on_delete=models.CASCADE, related_name='connections1')
    user2 = models.ForeignKey(User, on_delete=models.CASCADE, related_name='connections2')
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        unique_together = ('user1', 'user2')

    def __str__(self):
        return f"{self.user1.username} <-> {self.user2.username}"

class Follow(models.Model):
    follower = models.ForeignKey(User, on_delete=models.CASCADE, related_name='following_relations')
    followed = models.ForeignKey(User, on_delete=models.CASCADE, related_name='follower_relations')
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        unique_together = ('follower', 'followed')

    def __str__(self):
        return f"{self.follower.username} follows {self.followed.username}"

class Group(models.Model):
    name = models.CharField(max_length=255)
    description = models.TextField()
    is_private = models.BooleanField(default=False)
    moderators = models.ManyToManyField(User, related_name='moderated_groups')
    members = models.ManyToManyField(User, related_name='joined_groups')
    organization_id = models.IntegerField(null=True, blank=True)

    def __str__(self):
        return str(self.name)

class Event(models.Model):
    title = models.CharField(max_length=255)
    description = models.TextField()
    start_time = models.DateTimeField()
    end_time = models.DateTimeField()
    location = models.CharField(max_length=255)
    group = models.ForeignKey(Group, on_delete=models.CASCADE, related_name='events', null=True, blank=True)
    organizer = models.ForeignKey(User, on_delete=models.CASCADE)
    attendees = models.ManyToManyField(User, related_name='attending_events')
    organization_id = models.IntegerField(null=True, blank=True)

    def __str__(self):
        return str(self.title)

class Report(models.Model):
    reporter = models.ForeignKey(User, on_delete=models.CASCADE, related_name='reports_made')
    reported_user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='reports_received', null=True, blank=True)
    content = models.TextField()
    timestamp = models.DateTimeField(auto_now_add=True)
    resolved = models.BooleanField(default=False)
    organization_id = models.IntegerField(null=True, blank=True)

    def __str__(self):
        return f"Report by {self.reporter.username} at {self.timestamp}"

class Message(models.Model):
    sender = models.ForeignKey(User, on_delete=models.CASCADE, related_name='sent_messages')
    recipient = models.ForeignKey(User, on_delete=models.CASCADE, related_name='received_messages')
    body = models.TextField()
    timestamp = models.DateTimeField(auto_now_add=True)
    is_read = models.BooleanField(default=False)

    class Meta:
        ordering = ['timestamp']

    def __str__(self):
        return f"From {self.sender.username} to {self.recipient.username} at {self.timestamp}"

class Post(models.Model):
    POST_TYPE_CHOICES = [
        ('reflection', 'Reflection'),
        ('looking_for', 'Looking For'),
        ('offering', 'Offering'),
        ('event_invite', 'Event Invite'),
        ('progress_update', 'Progress Update'),
        ('skill_share', 'Skill Share'),
    ]
    author = models.ForeignKey(User, on_delete=models.CASCADE, related_name='posts')
    content = models.TextField()
    image = models.ImageField(upload_to='posts/', blank=True, null=True)
    post_type = models.CharField(max_length=20, choices=POST_TYPE_CHOICES, default='reflection')
    timestamp = models.DateTimeField(auto_now_add=True)
    
    class Meta:
        ordering = ['-timestamp']

    def __str__(self):
        return f"Post by {self.author.username} at {self.timestamp}"

    def user_has_reacted(self, user, reaction_type='heart'):
        if user.is_authenticated:
            return self.reactions.filter(user=user, reaction_type=reaction_type).exists()
        return False

class Comment(models.Model):
    post = models.ForeignKey(Post, on_delete=models.CASCADE, related_name='comments')
    author = models.ForeignKey(User, on_delete=models.CASCADE)
    content = models.TextField()
    timestamp = models.DateTimeField(auto_now_add=True)

    class Meta:
        ordering = ['timestamp']

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

class Reaction(models.Model):
    REACTION_CHOICES = [
        ('heart', 'Heart'),
        ('like', 'Like'),
        ('smile', 'Smile'),
    ]
    post = models.ForeignKey(Post, on_delete=models.CASCADE, related_name='reactions')
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    reaction_type = models.CharField(max_length=20, choices=REACTION_CHOICES, default='heart')

    class Meta:
        unique_together = ('post', 'user', 'reaction_type')

    def __str__(self):
        return f"{self.user.username} {self.reaction_type}ed {self.post}"

class HiddenPost(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='hidden_posts')
    post = models.ForeignKey(Post, on_delete=models.CASCADE)

    class Meta:
        unique_together = ('user', 'post')