from app import db
from datetime import datetime
import json

class Token(db.Model):
    __tablename__ = 'tokens'

    id = db.Column(db.Integer, primary_key=True)
    token = db.Column(db.String(50), unique=True, nullable=False)
    type = db.Column(db.String(20), nullable=False)  # admin, government, community, industry, ngo, academic, other
    name = db.Column(db.String(100), nullable=False)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)

    def to_dict(self):
        return {
            'id': self.id,
            'token': self.token,
            'type': self.type,
            'name': self.name,
            'created_at': self.created_at.isoformat() if self.created_at else None
        }

class Submission(db.Model):
    __tablename__ = 'submissions'

    id = db.Column(db.Integer, primary_key=True)
    message = db.Column(db.Text, nullable=False)
    contributor_type = db.Column(db.String(20), nullable=False)
    latitude = db.Column(db.Float, nullable=True)
    longitude = db.Column(db.Float, nullable=True)
    timestamp = db.Column(db.DateTime, default=datetime.utcnow)
    category = db.Column(db.String(50), nullable=True)  # Vision, Problem, Objectives, Directives, Values, Actions (backward compat)
    flagged_as_offensive = db.Column(db.Boolean, default=False)
    sentence_analysis_done = db.Column(db.Boolean, default=False)  # NEW: Track if sentence-level analysis is complete

    def get_primary_category(self):
        """Get most frequent category from sentences (or fallback to old category)"""
        if not self.sentences or len(self.sentences) == 0:
            return self.category  # Fallback to old system
        
        from collections import Counter
        categories = [s.category for s in self.sentences if s.category]
        if not categories:
            return None
        return Counter(categories).most_common(1)[0][0]
    
    def get_category_distribution(self):
        """Get percentage of each category in this submission"""
        if not self.sentences or len(self.sentences) == 0:
            return {self.category: 100.0} if self.category else {}
        
        from collections import Counter
        categories = [s.category for s in self.sentences if s.category]
        total = len(categories)
        if total == 0:
            return {}
        
        counts = Counter(categories)
        return {cat: round((count/total)*100, 1) for cat, count in counts.items()}

    def to_dict(self):
        """Convert to dictionary with sentence-level support"""
        base_dict = {
            'id': self.id,
            'message': self.message,
            'contributorType': self.contributor_type,
            'location': {
                'lat': self.latitude,
                'lng': self.longitude
            } if self.latitude and self.longitude else None,
            'timestamp': self.timestamp.isoformat() if self.timestamp else None,
            'category': self.get_primary_category() if self.sentence_analysis_done else self.category,
            'flaggedAsOffensive': self.flagged_as_offensive,
            'sentenceAnalysisDone': self.sentence_analysis_done
        }
        
        # Add sentence-level data if available
        if self.sentence_analysis_done and self.sentences:
            base_dict['sentences'] = [s.to_dict() for s in self.sentences]
            base_dict['categoryDistribution'] = self.get_category_distribution()
        
        return base_dict


class SubmissionSentence(db.Model):
    """Stores individual sentences from submissions with their categories"""
    __tablename__ = 'submission_sentences'
    
    id = db.Column(db.Integer, primary_key=True)
    submission_id = db.Column(db.Integer, db.ForeignKey('submissions.id'), nullable=False)
    sentence_index = db.Column(db.Integer, nullable=False)  # 0, 1, 2...
    text = db.Column(db.Text, nullable=False)
    category = db.Column(db.String(50), nullable=True)
    confidence = db.Column(db.Float, nullable=True)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    
    # Relationships
    submission = db.relationship('Submission', backref='sentences')
    
    # Composite unique constraint
    __table_args__ = (
        db.UniqueConstraint('submission_id', 'sentence_index', name='uq_submission_sentence'),
    )
    
    def to_dict(self):
        return {
            'id': self.id,
            'submission_id': self.submission_id,
            'sentence_index': self.sentence_index,
            'text': self.text,
            'category': self.category,
            'confidence': self.confidence,
            'created_at': self.created_at.isoformat() if self.created_at else None
        }


class Settings(db.Model):
    __tablename__ = 'settings'

    id = db.Column(db.Integer, primary_key=True)
    key = db.Column(db.String(50), unique=True, nullable=False)
    value = db.Column(db.String(100), nullable=False)  # Increased to support model IDs

    @staticmethod
    def get_setting(key, default='true'):
        setting = Settings.query.filter_by(key=key).first()
        return setting.value if setting else default

    @staticmethod
    def set_setting(key, value):
        setting = Settings.query.filter_by(key=key).first()
        if setting:
            setting.value = value
        else:
            setting = Settings(key=key, value=value)
            db.session.add(setting)
        db.session.commit()


class TrainingExample(db.Model):
    """Stores admin corrections for model fine-tuning"""
    __tablename__ = 'training_examples'

    id = db.Column(db.Integer, primary_key=True)
    submission_id = db.Column(db.Integer, db.ForeignKey('submissions.id'), nullable=True)  # Made nullable for sentence-level
    sentence_id = db.Column(db.Integer, db.ForeignKey('submission_sentences.id'), nullable=True)  # NEW: Link to sentence
    message = db.Column(db.Text, nullable=False)  # Snapshot of submission/sentence text
    original_category = db.Column(db.String(50), nullable=True)  # AI's prediction
    corrected_category = db.Column(db.String(50), nullable=False)  # Admin's correction
    contributor_type = db.Column(db.String(20), nullable=False)
    correction_timestamp = db.Column(db.DateTime, default=datetime.utcnow)
    confidence_score = db.Column(db.Float, nullable=True)  # Original prediction confidence
    used_in_training = db.Column(db.Boolean, default=False)
    training_run_id = db.Column(db.Integer, db.ForeignKey('fine_tuning_runs.id'), nullable=True)

    # Relationships
    submission = db.relationship('Submission', backref='training_examples')
    sentence = db.relationship('SubmissionSentence', backref='training_examples')
    training_run = db.relationship('FineTuningRun', backref='training_examples')

    def to_dict(self):
        return {
            'id': self.id,
            'submission_id': self.submission_id,
            'message': self.message,
            'original_category': self.original_category,
            'corrected_category': self.corrected_category,
            'contributor_type': self.contributor_type,
            'correction_timestamp': self.correction_timestamp.isoformat() if self.correction_timestamp else None,
            'confidence_score': self.confidence_score,
            'used_in_training': self.used_in_training,
            'training_run_id': self.training_run_id,
            'is_correction': self.original_category != self.corrected_category if self.original_category else False
        }


class FineTuningRun(db.Model):
    """Tracks fine-tuning training runs and their results"""
    __tablename__ = 'fine_tuning_runs'

    id = db.Column(db.Integer, primary_key=True)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    status = db.Column(db.String(20), default='preparing')  # preparing, training, evaluating, completed, failed
    num_training_examples = db.Column(db.Integer, nullable=True)
    num_validation_examples = db.Column(db.Integer, nullable=True)
    num_test_examples = db.Column(db.Integer, nullable=True)
    training_config = db.Column(db.Text, nullable=True)  # JSON string
    results = db.Column(db.Text, nullable=True)  # JSON string with metrics
    model_path = db.Column(db.String(255), nullable=True)
    is_active_model = db.Column(db.Boolean, default=False)
    improvement_over_baseline = db.Column(db.Float, nullable=True)
    completed_at = db.Column(db.DateTime, nullable=True)
    error_message = db.Column(db.Text, nullable=True)

    # Progress tracking
    current_epoch = db.Column(db.Integer, default=0)
    total_epochs = db.Column(db.Integer, nullable=True)
    current_step = db.Column(db.Integer, default=0)
    total_steps = db.Column(db.Integer, nullable=True)
    current_loss = db.Column(db.Float, nullable=True)
    progress_message = db.Column(db.String(255), nullable=True)

    def to_dict(self):
        return {
            'id': self.id,
            'created_at': self.created_at.isoformat() if self.created_at else None,
            'status': self.status,
            'num_training_examples': self.num_training_examples,
            'num_validation_examples': self.num_validation_examples,
            'num_test_examples': self.num_test_examples,
            'training_config': json.loads(self.training_config) if self.training_config else None,
            'results': json.loads(self.results) if self.results else None,
            'model_path': self.model_path,
            'is_active_model': self.is_active_model,
            'improvement_over_baseline': self.improvement_over_baseline,
            'completed_at': self.completed_at.isoformat() if self.completed_at else None,
            'error_message': self.error_message
        }

    def set_config(self, config_dict):
        """Set training config from dict"""
        self.training_config = json.dumps(config_dict)

    def get_config(self):
        """Get training config as dict"""
        return json.loads(self.training_config) if self.training_config else {}

    def set_results(self, results_dict):
        """Set results from dict"""
        self.results = json.dumps(results_dict)

    def get_results(self):
        """Get results as dict"""
        return json.loads(self.results) if self.results else {}