"""Computer plugin models."""

from shopdb.extensions import db
from shopdb.core.models.base import BaseModel


class ComputerType(BaseModel):
    """
    Computer type classification.

    Examples: Shopfloor PC, Engineer Workstation, CMM PC, Server, etc.
    """
    __tablename__ = 'computertypes'

    computertypeid = db.Column(db.Integer, primary_key=True)
    computertype = db.Column(db.String(100), unique=True, nullable=False)
    description = db.Column(db.Text)
    icon = db.Column(db.String(50), comment='Icon name for UI')

    def __repr__(self):
        return f"<ComputerType {self.computertype}>"


class Computer(BaseModel):
    """
    Computer-specific extension data.

    Links to core Asset table via assetid.
    Stores computer-specific fields like hostname, OS, logged in user, etc.
    """
    __tablename__ = 'computers'

    computerid = db.Column(db.Integer, primary_key=True)

    # Link to core asset
    assetid = db.Column(
        db.Integer,
        db.ForeignKey('assets.assetid', ondelete='CASCADE'),
        unique=True,
        nullable=False,
        index=True
    )

    # Computer classification
    computertypeid = db.Column(
        db.Integer,
        db.ForeignKey('computertypes.computertypeid'),
        nullable=True
    )

    # Network identity
    hostname = db.Column(
        db.String(100),
        index=True,
        comment='Network hostname'
    )

    # Operating system
    osid = db.Column(
        db.Integer,
        db.ForeignKey('operatingsystems.osid'),
        nullable=True
    )

    # Status tracking
    loggedinuser = db.Column(db.String(100), nullable=True)
    lastreporteddate = db.Column(db.DateTime, nullable=True)
    lastboottime = db.Column(db.DateTime, nullable=True)

    # Remote access features
    isvnc = db.Column(
        db.Boolean,
        default=False,
        comment='VNC remote access enabled'
    )
    iswinrm = db.Column(
        db.Boolean,
        default=False,
        comment='WinRM enabled'
    )

    # Classification flags
    isshopfloor = db.Column(
        db.Boolean,
        default=False,
        comment='Shopfloor PC (vs office PC)'
    )

    # Relationships
    asset = db.relationship(
        'Asset',
        backref=db.backref('computer', uselist=False, lazy='joined')
    )
    computertype = db.relationship('ComputerType', backref='computers')
    operatingsystem = db.relationship('OperatingSystem', backref='computers')

    # Installed applications (one-to-many)
    installedapps = db.relationship(
        'ComputerInstalledApp',
        back_populates='computer',
        cascade='all, delete-orphan',
        lazy='dynamic'
    )

    __table_args__ = (
        db.Index('idx_computer_type', 'computertypeid'),
        db.Index('idx_computer_hostname', 'hostname'),
        db.Index('idx_computer_os', 'osid'),
    )

    def __repr__(self):
        return f"<Computer {self.hostname or self.assetid}>"

    def to_dict(self):
        """Convert to dictionary with related names."""
        result = super().to_dict()

        # Add related object names
        if self.computertype:
            result['computertypename'] = self.computertype.computertype
        if self.operatingsystem:
            result['osname'] = self.operatingsystem.osname

        return result


class ComputerInstalledApp(db.Model):
    """
    Junction table for applications installed on computers.

    Tracks which applications are installed on which computers,
    including version information.
    """
    __tablename__ = 'computerinstalledapps'

    id = db.Column(db.Integer, primary_key=True)
    computerid = db.Column(
        db.Integer,
        db.ForeignKey('computers.computerid', ondelete='CASCADE'),
        nullable=False
    )
    appid = db.Column(
        db.Integer,
        db.ForeignKey('applications.appid'),
        nullable=False
    )
    appversionid = db.Column(
        db.Integer,
        db.ForeignKey('appversions.appversionid'),
        nullable=True
    )
    isactive = db.Column(db.Boolean, default=True, nullable=False)
    installeddate = db.Column(db.DateTime, default=db.func.now())

    # Relationships
    computer = db.relationship('Computer', back_populates='installedapps')
    application = db.relationship('Application')
    appversion = db.relationship('AppVersion')

    __table_args__ = (
        db.UniqueConstraint('computerid', 'appid', name='uq_computer_app'),
        db.Index('idx_compapp_computer', 'computerid'),
        db.Index('idx_compapp_app', 'appid'),
    )

    def to_dict(self):
        """Convert to dictionary."""
        return {
            'id': self.id,
            'computerid': self.computerid,
            'appid': self.appid,
            'appversionid': self.appversionid,
            'isactive': self.isactive,
            'installeddate': self.installeddate.isoformat() + 'Z' if self.installeddate else None,
            'application': {
                'appid': self.application.appid,
                'appname': self.application.appname,
                'appdescription': self.application.appdescription,
            } if self.application else None,
            'version': self.appversion.version if self.appversion else None
        }

    def __repr__(self):
        return f"<ComputerInstalledApp computer={self.computerid} app={self.appid}>"