# Admin-specific models
# models/database/admin.py
"""
Admin-specific database models.

This module provides models for:
- Admin audit logging (compliance and security tracking)
- Admin notifications (system alerts and warnings)
- Platform settings (global configuration)
- Platform alerts (system-wide issues)
- Application logs (critical events logging)
"""

from sqlalchemy import (
    JSON,
    Boolean,
    Column,
    DateTime,
    ForeignKey,
    Integer,
    String,
    Text,
)
from sqlalchemy.orm import relationship

from app.core.database import Base

from .base import TimestampMixin


class AdminAuditLog(Base, TimestampMixin):
    """
    Track all admin actions for compliance and security.

    Separate from regular audit logs - focuses on admin-specific operations
    like vendor creation, user management, and system configuration changes.
    """

    __tablename__ = "admin_audit_logs"

    id = Column(Integer, primary_key=True, index=True)
    admin_user_id = Column(Integer, ForeignKey("users.id"), nullable=False, index=True)
    action = Column(
        String(100), nullable=False, index=True
    )  # create_vendor, delete_vendor, etc.
    target_type = Column(
        String(50), nullable=False, index=True
    )  # vendor, user, import_job, setting
    target_id = Column(String(100), nullable=False, index=True)
    details = Column(JSON)  # Additional context about the action
    ip_address = Column(String(45))  # IPv4 or IPv6
    user_agent = Column(Text)
    request_id = Column(String(100))  # For correlating with application logs

    # Relationships
    admin_user = relationship("User", foreign_keys=[admin_user_id])

    def __repr__(self):
        return f"<AdminAuditLog(id={self.id}, action='{self.action}', target={self.target_type}:{self.target_id})>"


# AdminNotification has been moved to app/modules/messaging/models/admin_notification.py
# It's re-exported via models/database/__init__.py for backwards compatibility


class AdminSetting(Base, TimestampMixin):
    """
    Platform-wide admin settings and configuration.

    Stores global settings that affect the entire platform, different from
    vendor-specific settings. Supports encryption for sensitive values.

    Examples:
    - max_vendors_allowed
    - maintenance_mode
    - default_vendor_trial_days
    - smtp_settings
    - stripe_api_keys (encrypted)
    """

    __tablename__ = "admin_settings"

    id = Column(Integer, primary_key=True, index=True)
    key = Column(String(100), unique=True, nullable=False, index=True)
    value = Column(Text, nullable=False)
    value_type = Column(String(20), default="string")  # string, integer, boolean, json
    category = Column(
        String(50), index=True
    )  # system, security, marketplace, notifications
    description = Column(Text)
    is_encrypted = Column(Boolean, default=False)
    is_public = Column(Boolean, default=False)  # Can be exposed to frontend?
    last_modified_by_user_id = Column(Integer, ForeignKey("users.id"), nullable=True)

    # Relationships
    last_modified_by = relationship("User", foreign_keys=[last_modified_by_user_id])

    def __repr__(self):
        return f"<AdminSetting(key='{self.key}', category='{self.category}')>"


class PlatformAlert(Base, TimestampMixin):
    """
    System-wide alerts that admins need to be aware of.

    Tracks platform issues, performance problems, security incidents,
    and other system-level concerns that require admin attention.
    """

    __tablename__ = "platform_alerts"

    id = Column(Integer, primary_key=True, index=True)
    alert_type = Column(
        String(50), nullable=False, index=True
    )  # security, performance, capacity, integration
    severity = Column(
        String(20), nullable=False, index=True
    )  # info, warning, error, critical
    title = Column(String(200), nullable=False)
    description = Column(Text)
    affected_vendors = Column(JSON)  # List of affected vendor IDs
    affected_systems = Column(JSON)  # List of affected system components
    is_resolved = Column(Boolean, default=False, index=True)
    resolved_at = Column(DateTime, nullable=True)
    resolved_by_user_id = Column(Integer, ForeignKey("users.id"), nullable=True)
    resolution_notes = Column(Text)
    auto_generated = Column(Boolean, default=True)  # System-generated vs manual
    occurrence_count = Column(Integer, default=1)  # Track repeated occurrences
    first_occurred_at = Column(DateTime, nullable=False)
    last_occurred_at = Column(DateTime, nullable=False)

    # Relationships
    resolved_by = relationship("User", foreign_keys=[resolved_by_user_id])

    def __repr__(self):
        return f"<PlatformAlert(id={self.id}, type='{self.alert_type}', severity='{self.severity}')>"


class AdminSession(Base, TimestampMixin):
    """
    Track admin login sessions for security monitoring.

    Helps identify suspicious login patterns, track concurrent sessions,
    and enforce session policies for admin users.
    """

    __tablename__ = "admin_sessions"

    id = Column(Integer, primary_key=True, index=True)
    admin_user_id = Column(Integer, ForeignKey("users.id"), nullable=False, index=True)
    session_token = Column(String(255), unique=True, nullable=False, index=True)
    ip_address = Column(String(45), nullable=False)
    user_agent = Column(Text)
    login_at = Column(DateTime, nullable=False, index=True)
    last_activity_at = Column(DateTime, nullable=False)
    logout_at = Column(DateTime, nullable=True)
    is_active = Column(Boolean, default=True, index=True)
    logout_reason = Column(String(50))  # manual, timeout, forced, suspicious

    # Relationships
    admin_user = relationship("User", foreign_keys=[admin_user_id])

    def __repr__(self):
        return f"<AdminSession(id={self.id}, admin_user_id={self.admin_user_id}, is_active={self.is_active})>"


class ApplicationLog(Base, TimestampMixin):
    """
    Application-level logs stored in database for critical events.

    Stores WARNING, ERROR, and CRITICAL level logs for easy searching,
    filtering, and compliance. INFO and DEBUG logs are kept in files only.
    """

    __tablename__ = "application_logs"

    id = Column(Integer, primary_key=True, index=True)
    timestamp = Column(DateTime, nullable=False, index=True)
    level = Column(String(20), nullable=False, index=True)  # WARNING, ERROR, CRITICAL
    logger_name = Column(String(200), nullable=False, index=True)
    module = Column(String(200))
    function_name = Column(String(100))
    line_number = Column(Integer)
    message = Column(Text, nullable=False)
    exception_type = Column(String(200))
    exception_message = Column(Text)
    stack_trace = Column(Text)
    request_id = Column(String(100), index=True)  # For correlating logs
    user_id = Column(Integer, ForeignKey("users.id"), nullable=True, index=True)
    vendor_id = Column(Integer, ForeignKey("vendors.id"), nullable=True, index=True)
    context = Column(JSON)  # Additional context data

    # Relationships
    user = relationship("User", foreign_keys=[user_id])
    vendor = relationship("Vendor", foreign_keys=[vendor_id])

    def __repr__(self):
        return f"<ApplicationLog(id={self.id}, level='{self.level}', logger='{self.logger_name}')>"