"""Application tracking models."""

from shopdb.extensions import db
from .base import BaseModel


class AppOwner(BaseModel):
    """Application owner/contact."""
    __tablename__ = 'appowners'

    appownerid = db.Column(db.Integer, primary_key=True)
    appowner = db.Column(db.String(100), nullable=False)
    sso = db.Column(db.String(50))
    email = db.Column(db.String(100))

    # Relationships
    supportteams = db.relationship('SupportTeam', back_populates='owner', lazy='dynamic')

    def __repr__(self):
        return f"<AppOwner {self.appowner}>"


class SupportTeam(BaseModel):
    """Application support team."""
    __tablename__ = 'supportteams'

    supportteamid = db.Column(db.Integer, primary_key=True)
    teamname = db.Column(db.String(100), nullable=False)
    teamurl = db.Column(db.String(255))
    appownerid = db.Column(db.Integer, db.ForeignKey('appowners.appownerid'))

    # Relationships
    owner = db.relationship('AppOwner', back_populates='supportteams')
    applications = db.relationship('Application', back_populates='supportteam', lazy='dynamic')

    def __repr__(self):
        return f"<SupportTeam {self.teamname}>"


class Application(BaseModel):
    """Application catalog."""
    __tablename__ = 'applications'

    appid = db.Column(db.Integer, primary_key=True)
    appname = db.Column(db.String(100), unique=True, nullable=False)
    appdescription = db.Column(db.String(255))
    supportteamid = db.Column(db.Integer, db.ForeignKey('supportteams.supportteamid'))
    isinstallable = db.Column(db.Boolean, default=False)
    applicationnotes = db.Column(db.Text)
    installpath = db.Column(db.String(255))
    applicationlink = db.Column(db.String(512))
    documentationpath = db.Column(db.String(512))
    ishidden = db.Column(db.Boolean, default=False)
    isprinter = db.Column(db.Boolean, default=False)
    islicenced = db.Column(db.Boolean, default=False)
    image = db.Column(db.String(255))

    # Relationships
    supportteam = db.relationship('SupportTeam', back_populates='applications')
    versions = db.relationship('AppVersion', back_populates='application', lazy='dynamic')
    installed_on = db.relationship('InstalledApp', back_populates='application', lazy='dynamic')

    def __repr__(self):
        return f"<Application {self.appname}>"


class AppVersion(BaseModel):
    """Application version tracking."""
    __tablename__ = 'appversions'

    appversionid = db.Column(db.Integer, primary_key=True)
    appid = db.Column(db.Integer, db.ForeignKey('applications.appid'), nullable=False)
    version = db.Column(db.String(50), nullable=False)
    releasedate = db.Column(db.Date)
    notes = db.Column(db.String(255))
    dateadded = db.Column(db.DateTime, default=db.func.now())

    # Relationships
    application = db.relationship('Application', back_populates='versions')
    installations = db.relationship('InstalledApp', back_populates='appversion', lazy='dynamic')

    # Unique constraint on app + version
    __table_args__ = (
        db.UniqueConstraint('appid', 'version', name='uq_app_version'),
    )

    def __repr__(self):
        return f"<AppVersion {self.application.appname if self.application else self.appid} v{self.version}>"


class InstalledApp(db.Model):
    """Junction table for applications installed on machines (PCs)."""
    __tablename__ = 'installedapps'

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

    # Relationships
    machine = db.relationship('Machine', back_populates='installedapps')
    application = db.relationship('Application', back_populates='installed_on')
    appversion = db.relationship('AppVersion', back_populates='installations')

    # Unique constraint - one app per machine (can have different versions over time)
    __table_args__ = (
        db.UniqueConstraint('machineid', 'appid', name='uq_machine_app'),
    )

    def to_dict(self):
        """Convert to dictionary."""
        return {
            'id': self.id,
            'machineid': self.machineid,
            '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"<InstalledApp machine={self.machineid} app={self.appid}>"