from datetime import datetime
from flask_login import UserMixin
from werkzeug.security import generate_password_hash, check_password_hash
from app import db, login_manager

@login_manager.user_loader
def load_user(user_id):
    return User.query.get(int(user_id))

class User(UserMixin, db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(64), unique=True, nullable=False)
    email = db.Column(db.String(120), unique=True, nullable=False)
    password_hash = db.Column(db.String(256), nullable=False)
    role = db.Column(db.String(20), default='user')  # 'admin' or 'user'
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    
    def set_password(self, password):
        self.password_hash = generate_password_hash(password)
        
    def check_password(self, password):
        return check_password_hash(self.password_hash, password)
    
    def is_admin(self):
        return self.role == 'admin'

class Product(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), nullable=False)
    description = db.Column(db.Text, nullable=False)
    price = db.Column(db.Float)
    image_url = db.Column(db.String(255))
    category_id = db.Column(db.Integer, db.ForeignKey('category.id'))
    is_available = db.Column(db.Boolean, default=True)
    condition = db.Column(db.String(20))  # 'new', 'reconditioned', etc.
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    # Define relationship with Category
    category = db.relationship('Category', backref='products')

class Category(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(50), nullable=False)
    description = db.Column(db.Text)
    parent_id = db.Column(db.Integer, db.ForeignKey('category.id'))
    
    # Self-referential relationship for parent-child categories
    subcategories = db.relationship(
        'Category',
        backref=db.backref('parent', remote_side=[id]),
        cascade='all, delete-orphan'
    )

class Service(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), nullable=False)
    description = db.Column(db.Text, nullable=False)
    image_url = db.Column(db.String(255))
    is_active = db.Column(db.Boolean, default=True)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

class Contact(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), nullable=False)
    email = db.Column(db.String(120), nullable=False)
    phone = db.Column(db.String(20))
    message = db.Column(db.Text, nullable=False)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    is_read = db.Column(db.Boolean, default=False)

class FAQ(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    question = db.Column(db.String(255), nullable=False)
    answer = db.Column(db.Text, nullable=False)
    order = db.Column(db.Integer, default=0)
    is_active = db.Column(db.Boolean, default=True)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

class SiteSetting(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    key = db.Column(db.String(50), unique=True, nullable=False)
    value = db.Column(db.Text)
    description = db.Column(db.String(255))
    
    @classmethod
    def get(cls, key, default=None):
        setting = cls.query.filter_by(key=key).first()
        return setting.value if setting else default
    
    @classmethod
    def set(cls, key, value, description=None):
        setting = cls.query.filter_by(key=key).first()
        if setting:
            setting.value = value
            if description:
                setting.description = description
        else:
            setting = cls(key=key, value=value, description=description)
            db.session.add(setting)
        db.session.commit()
        
class Page(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(100), nullable=False)
    slug = db.Column(db.String(100), unique=True, nullable=False)
    description = db.Column(db.String(255))
    is_active = db.Column(db.Boolean, default=True)
    meta_keywords = db.Column(db.String(255))
    meta_description = db.Column(db.String(255))
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    # Relation avec les sections
    sections = db.relationship('Section', backref='page', cascade='all, delete-orphan')

class Section(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    page_id = db.Column(db.Integer, db.ForeignKey('page.id'), nullable=False)
    title = db.Column(db.String(100), nullable=False)
    content = db.Column(db.Text)
    section_type = db.Column(db.String(50), default='text')  # text, banner, gallery, etc.
    order = db.Column(db.Integer, default=0)
    is_active = db.Column(db.Boolean, default=True)
    background_color = db.Column(db.String(20), default='#ffffff')
    css_class = db.Column(db.String(100))
    image_url = db.Column(db.String(255))
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)