# 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)
"""

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})>"


class AdminNotification(Base, TimestampMixin):
    """
    Admin-specific notifications for system alerts and warnings.

    Different from vendor/customer notifications - these are for platform
    administrators to track system health and issues requiring attention.
    """

    __tablename__ = "admin_notifications"

    id = Column(Integer, primary_key=True, index=True)
    type = Column(
        String(50), nullable=False, index=True
    )  # system_alert, vendor_issue, import_failure
    priority = Column(
        String(20), default="normal", index=True
    )  # low, normal, high, critical
    title = Column(String(200), nullable=False)
    message = Column(Text, nullable=False)
    is_read = Column(Boolean, default=False, index=True)
    read_at = Column(DateTime, nullable=True)
    read_by_user_id = Column(Integer, ForeignKey("users.id"), nullable=True)
    action_required = Column(Boolean, default=False, index=True)
    action_url = Column(String(500))  # Link to relevant admin page
    notification_metadata = Column(JSON)  # Additional contextual data

    # Relationships
    read_by = relationship("User", foreign_keys=[read_by_user_id])

    def __repr__(self):
        return f"<AdminNotification(id={self.id}, type='{self.type}', priority='{self.priority}')>"


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})>"