from datetime import datetime
from typing import Any
from uuid import uuid4

from sqlalchemy import (
    JSON,
    Boolean,
    DateTime,
    Float,
    ForeignKey,
    Index,
    Integer,
    String,
    UniqueConstraint,
    false,
    func,
)
from sqlalchemy.orm import Mapped, mapped_column

from ai_platform.infrastructure.persistence.database import Base


class AppCredential(Base):
    __tablename__ = "app_credentials"
    app_id: Mapped[str] = mapped_column(String(128), primary_key=True)
    verifier: Mapped[str] = mapped_column(String(64), nullable=False, unique=True)
    active: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
    lead_scoring: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), onupdate=func.now(), nullable=False
    )


class AppCredentialAuditEvent(Base):
    __tablename__ = "app_credential_audit_events"
    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    app_id: Mapped[str] = mapped_column(String(128), nullable=False)
    actor: Mapped[str] = mapped_column(String(254), nullable=False)
    action: Mapped[str] = mapped_column(String(16), nullable=False)
    occurred_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), nullable=False
    )


class AdminUser(Base):
    __tablename__ = "admin_users"
    email: Mapped[str] = mapped_column(String(254), primary_key=True)
    password_hash: Mapped[str] = mapped_column(String(512), nullable=False)


class AdminSession(Base):
    __tablename__ = "admin_sessions"
    id: Mapped[str] = mapped_column(String(64), primary_key=True)
    admin_email: Mapped[str] = mapped_column(ForeignKey("admin_users.email"), nullable=False)
    csrf_hash: Mapped[str] = mapped_column(String(64), nullable=False)
    expires_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)


class AIProfile(Base):
    __tablename__ = "ai_profiles"
    version: Mapped[str] = mapped_column(String(64), primary_key=True)
    model: Mapped[str] = mapped_column(String(128), nullable=False)
    provider: Mapped[str] = mapped_column(
        String(32), default="aihub", server_default="aihub", nullable=False
    )
    base_url: Mapped[str | None] = mapped_column(String(2048))
    system_prompt: Mapped[str] = mapped_column(String(8000), nullable=False)
    timeout_seconds: Mapped[int] = mapped_column(Integer, nullable=False)
    limits: Mapped[dict[str, Any]] = mapped_column(JSON, nullable=False)
    active: Mapped[bool] = mapped_column(
        Boolean, default=False, server_default=false(), nullable=False
    )


class AIProfileAuditEvent(Base):
    __tablename__ = "ai_profile_audit_events"
    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    actor: Mapped[str] = mapped_column(String(254), nullable=False)
    version: Mapped[str] = mapped_column(String(64), nullable=False)
    provider: Mapped[str] = mapped_column(String(32), nullable=False)
    occurred_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), nullable=False
    )


class ScoringRun(Base):
    __tablename__ = "scoring_runs"
    __table_args__ = (
        UniqueConstraint("app_id", "account_id", "request_id", name="uq_run_app_account_request"),
    )
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid4()))
    app_id: Mapped[str] = mapped_column(ForeignKey("app_credentials.app_id"), index=True)
    account_id: Mapped[str] = mapped_column(String(255), nullable=False)
    request_id: Mapped[str] = mapped_column(String(36), nullable=False)
    fingerprint: Mapped[str] = mapped_column(String(64), nullable=False)
    request: Mapped[dict[str, Any]] = mapped_column(JSON, nullable=False)
    profile_version: Mapped[str] = mapped_column(String(64), nullable=False)
    status: Mapped[str] = mapped_column(String(24), default="pending", index=True)
    rule_score: Mapped[int | None] = mapped_column(Integer)
    ai_score: Mapped[int | None] = mapped_column(Integer)
    ai_confidence: Mapped[float | None] = mapped_column(Float)
    ai_reasoning: Mapped[str | None] = mapped_column(String(2_000))
    error_code: Mapped[str | None] = mapped_column(String(64))
    final_score: Mapped[int | None] = mapped_column(Integer)
    degraded: Mapped[bool] = mapped_column(Boolean, default=False, server_default=false())
    result_mode: Mapped[str | None] = mapped_column(String(32))
    breakdown: Mapped[list[dict[str, Any]] | None] = mapped_column(JSON)
    ai_evidence: Mapped[list[dict[str, Any]] | None] = mapped_column(JSON)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), index=True
    )
    completed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))


class ScoringNotification(Base):
    __tablename__ = "scoring_notifications"
    __table_args__ = (Index("ix_scoring_notifications_due", "dead", "next_attempt_at"),)
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid4()))
    run_id: Mapped[str] = mapped_column(
        ForeignKey("scoring_runs.id", ondelete="CASCADE"), unique=True, nullable=False
    )
    app_id: Mapped[str] = mapped_column(String(128), nullable=False)
    account_id: Mapped[str] = mapped_column(String(255), nullable=False)
    request_id: Mapped[str] = mapped_column(String(36), nullable=False)
    status: Mapped[str] = mapped_column(String(24), nullable=False)
    attempts: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
    next_attempt_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
    delivered_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    dead: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)