from datetime import date, datetime
from typing import Optional

from sqlalchemy import Boolean, Date, DateTime, Integer, String, Text, UniqueConstraint
from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column


class Base(DeclarativeBase):
    pass


class JobPosting(Base):
    __tablename__ = "job_postings"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    site_id: Mapped[str] = mapped_column(String(64), nullable=False, index=True)
    external_job_id: Mapped[Optional[str]] = mapped_column(String(256), nullable=True)
    title: Mapped[str] = mapped_column(String(512), nullable=False)
    company: Mapped[Optional[str]] = mapped_column(String(256), nullable=True)
    location: Mapped[Optional[str]] = mapped_column(String(256), nullable=True)
    posted_text: Mapped[Optional[str]] = mapped_column(String(128), nullable=True)
    posted_at_normalized: Mapped[Optional[datetime]] = mapped_column(DateTime, nullable=True)
    job_url: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
    salary_text: Mapped[Optional[str]] = mapped_column(String(256), nullable=True)
    employment_type: Mapped[Optional[str]] = mapped_column(String(128), nullable=True)
    raw_text: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
    fingerprint: Mapped[str] = mapped_column(String(64), nullable=False, unique=True)
    run_date: Mapped[date] = mapped_column(Date, nullable=False, index=True)
    first_seen_at: Mapped[datetime] = mapped_column(DateTime, nullable=False)
    last_seen_at: Mapped[datetime] = mapped_column(DateTime, nullable=False)
    is_new: Mapped[bool] = mapped_column(Boolean, nullable=False, default=True)
    is_active: Mapped[bool] = mapped_column(Boolean, nullable=False, default=True)


class SiteRun(Base):
    __tablename__ = "site_runs"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    site_id: Mapped[str] = mapped_column(String(64), nullable=False, index=True)
    started_at: Mapped[datetime] = mapped_column(DateTime, nullable=False)
    ended_at: Mapped[Optional[datetime]] = mapped_column(DateTime, nullable=True)
    status: Mapped[str] = mapped_column(String(32), nullable=False)
    items_found: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    new_items: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    error_summary: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
    failure_classification: Mapped[Optional[str]] = mapped_column(String(64), nullable=True)
    trace_path: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
    screenshot_path: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
    dom_snapshot_path: Mapped[Optional[str]] = mapped_column(Text, nullable=True)


class SiteConfig(Base):
    __tablename__ = "site_configs"

    site_id: Mapped[str] = mapped_column(String(64), primary_key=True)
    enabled: Mapped[bool] = mapped_column(Boolean, nullable=False, default=True)
    repair_needed: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
    consecutive_failures: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    last_success_at: Mapped[Optional[datetime]] = mapped_column(DateTime, nullable=True)
    last_failure_at: Mapped[Optional[datetime]] = mapped_column(DateTime, nullable=True)
    notes: Mapped[Optional[str]] = mapped_column(Text, nullable=True)


class SiteManifestVersion(Base):
    __tablename__ = "site_manifest_versions"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    site_id: Mapped[str] = mapped_column(String(64), nullable=False, index=True)
    version: Mapped[int] = mapped_column(Integer, nullable=False, default=1)
    generated_by: Mapped[str] = mapped_column(String(64), nullable=False, default="manual")
    created_at: Mapped[datetime] = mapped_column(DateTime, nullable=False)
    notes: Mapped[Optional[str]] = mapped_column(Text, nullable=True)


class Summary(Base):
    __tablename__ = "summaries"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    run_date: Mapped[date] = mapped_column(Date, nullable=False, index=True)
    content: Mapped[str] = mapped_column(Text, nullable=False)
    model_used: Mapped[str] = mapped_column(String(128), nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, nullable=False)


class NotificationLog(Base):
    __tablename__ = "notification_logs"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    run_date: Mapped[date] = mapped_column(Date, nullable=False, index=True)
    provider: Mapped[str] = mapped_column(String(64), nullable=False)
    status: Mapped[str] = mapped_column(String(32), nullable=False)
    error_message: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
    sent_at: Mapped[datetime] = mapped_column(DateTime, nullable=False)