from datetime import datetime
from typing import List, Optional

from sqlalchemy import Boolean, Column, DateTime, ForeignKey, Integer, String, Text, Index
from sqlalchemy.orm import relationship

from app.core.database import Base


class DMARCReport(Base):
    """DMARC Aggregate Report model"""
    
    __tablename__ = "dmarc_reports"
    
    id = Column(Integer, primary_key=True, index=True)
    domain_id = Column(Integer, ForeignKey("domains.id"), nullable=False, index=True)
    
    # Report metadata
    report_id = Column(String, index=True, nullable=False)
    org_name = Column(String, nullable=False, index=True)
    begin_date = Column(Integer, nullable=False, index=True)  # Unix timestamp
    end_date = Column(Integer, nullable=False, index=True)  # Unix timestamp
    source_email = Column(String, nullable=True)
    
    # Policy information
    policy = Column(String, nullable=True, index=True)  # none, quarantine, reject
    subdomain_policy = Column(String, nullable=True)
    adkim = Column(String(1), nullable=True)  # r (relaxed) or s (strict)
    aspf = Column(String(1), nullable=True)   # r (relaxed) or s (strict)
    percentage = Column(Integer, nullable=True)
    
    # Processing metadata
    processed_at = Column(DateTime, default=datetime.utcnow, index=True)
    raw_data = Column(Text, nullable=True)  # Original XML content (optional)
    
    # Relationships
    domain = relationship("Domain", back_populates="reports")
    records = relationship("ReportRecord", back_populates="report", cascade="all, delete-orphan")
    
    # Indexes for common queries
    __table_args__ = (
        # Composite index for domain and date range queries (common dashboard queries)
        Index('ix_dmarc_reports_domain_dates', 'domain_id', 'begin_date', 'end_date'),
        # Index for finding reports by policy
        Index('ix_dmarc_reports_policy', 'policy'),
        # Index for finding recent reports (dashboard statistics)
        Index('ix_dmarc_reports_processed', 'processed_at'),
    )
    
    def __repr__(self):
        return f"<DMARCReport {self.report_id} for {self.domain_id}>"


class ReportRecord(Base):
    """Individual record within a DMARC report"""
    
    __tablename__ = "report_records"
    
    id = Column(Integer, primary_key=True, index=True)
    report_id = Column(Integer, ForeignKey("dmarc_reports.id"), nullable=False, index=True)
    
    # Source information
    source_ip = Column(String, nullable=False, index=True)
    count = Column(Integer, nullable=False, default=0)
    
    # Policy evaluation
    disposition = Column(String, nullable=False, index=True)  # none, quarantine, reject
    dkim = Column(String, nullable=True, index=True)  # pass, fail
    spf = Column(String, nullable=True, index=True)   # pass, fail
    
    # Identifiers
    header_from = Column(String, nullable=True, index=True)
    envelope_from = Column(String, nullable=True)
    
    # Authentication details (optional JSON fields)
    dkim_auth_details = Column(Text, nullable=True)  # JSON array of DKIM results
    spf_auth_details = Column(Text, nullable=True)   # JSON array of SPF results
    
    # Relationships
    report = relationship("DMARCReport", back_populates="records")
    
    # Indexes for common queries
    __table_args__ = (
        # Composite index for source IP and evaluation results (for filtering)
        Index('ix_report_records_source_auth', 'source_ip', 'dkim', 'spf'),
        # Composite index for disposition and count (for statistics)
        Index('ix_report_records_disposition', 'disposition', 'count'),
    )
    
    def __repr__(self):
        return f"<ReportRecord {self.id} ({self.source_ip})>"