"""Mapping templates for user-defined data source payloads."""

from sqlalchemy import Boolean, Column, DateTime, ForeignKey, Integer, JSON, String
from sqlalchemy.sql import func

from app.db.session import Base


class DataSourceMappingTemplate(Base):
    __tablename__ = "datasource_mapping_templates"

    id = Column(Integer, primary_key=True, autoincrement=True)
    datasource_config_id = Column(
        Integer,
        ForeignKey("datasource_configs.id"),
        nullable=False,
        index=True,
    )
    target_schema = Column(String(80), nullable=False, index=True)
    mapping_json = Column(JSON, nullable=False, default={})
    sample_payload_hash = Column(String(64), nullable=True)
    validation_status = Column(String(30), nullable=False, default="draft")
    version = Column(Integer, nullable=False, default=1)
    is_active = Column(Boolean, nullable=False, default=False, index=True)
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())

    def __repr__(self):
        return (
            f"<DataSourceMappingTemplate {self.id}: "
            f"{self.datasource_config_id}/{self.target_schema}/v{self.version}>"
        )