"""ORM tables owned by Agent 3 (delivery & infra).

Use ``from app.core.database import Base`` and the helpers in
``app.infrastructure.db.columns`` (``pk()``, ``created()``). Do NOT import from
``app.infrastructure.db.models`` here: that module imports this one (import cycle).
Foreign keys to existing tables are written as plain strings, e.g.
``ForeignKey("organizations.id", ondelete="CASCADE")``. See docs/plan/PLAN-v2.md §6.

Four tables carry the whole CI/CD story:

* ``pipeline_runs`` — one row per build. ``(project_id, status)`` is indexed
  because the worker's hot query is "the queued runs, oldest first".
* ``pipeline_steps`` — the eight steps of a run, with a bounded log tail. The
  full output is streamed live and never stored; a build log is unbounded and a
  database is the wrong place for it.
* ``releases`` — every sha that passed, so a demo rollback is a pointer move
  rather than a rebuild.
* ``app_runtimes`` — the demo container a project currently has. One row per
  project (it is the primary key), because D5 gives each app exactly one demo
  container; blue/green is a temporary second container, not a second row.
"""

from __future__ import annotations

from datetime import datetime

from sqlalchemy import Boolean, DateTime, ForeignKey, Index, Integer, String, Text
from sqlalchemy.orm import Mapped, mapped_column

from app.core.database import Base
from app.domain.base import utcnow
from app.infrastructure.db.columns import created, pk

#: 64 KB, matching the plan's cap on a stored step log tail.
MAX_LOG_TAIL_CHARS = 65_536


class PipelineRunRow(Base):
    __tablename__ = "pipeline_runs"
    __table_args__ = (
        Index("ix_pipeline_run_project_status", "project_id", "status"),
        Index("ix_pipeline_run_org_created", "organization_id", "created_at"),
    )

    id: Mapped[str] = pk()
    organization_id: Mapped[str] = mapped_column(
        ForeignKey("organizations.id", ondelete="CASCADE"), nullable=False, index=True
    )
    project_id: Mapped[str] = mapped_column(
        ForeignKey("projects.id", ondelete="CASCADE"), nullable=False, index=True
    )
    trigger: Mapped[str] = mapped_column(String(16), default="engine", nullable=False)
    branch: Mapped[str] = mapped_column(String(120), default="dev", nullable=False)
    sha: Mapped[str] = mapped_column(String(64), default="", nullable=False)
    status: Mapped[str] = mapped_column(String(16), default="queued", nullable=False)
    error_summary: Mapped[str] = mapped_column(Text, default="", nullable=False)
    started_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    finished_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    created_at: Mapped[datetime] = created()


class PipelineStepRow(Base):
    __tablename__ = "pipeline_steps"
    __table_args__ = (Index("ix_pipeline_step_run_index", "run_id", "index"),)

    id: Mapped[str] = pk()
    run_id: Mapped[str] = mapped_column(
        ForeignKey("pipeline_runs.id", ondelete="CASCADE"), nullable=False, index=True
    )
    index: Mapped[int] = mapped_column(Integer, nullable=False)
    name: Mapped[str] = mapped_column(String(48), nullable=False)
    status: Mapped[str] = mapped_column(String(16), default="pending", nullable=False)
    exit_code: Mapped[int | None] = mapped_column(Integer, nullable=True)
    log_tail: Mapped[str] = mapped_column(Text, default="", nullable=False)
    started_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    finished_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)


class ReleaseRow(Base):
    __tablename__ = "releases"
    __table_args__ = (Index("ix_release_project_created", "project_id", "created_at"),)

    id: Mapped[str] = pk()
    organization_id: Mapped[str] = mapped_column(
        ForeignKey("organizations.id", ondelete="CASCADE"), nullable=False, index=True
    )
    project_id: Mapped[str] = mapped_column(
        ForeignKey("projects.id", ondelete="CASCADE"), nullable=False, index=True
    )
    run_id: Mapped[str] = mapped_column(
        ForeignKey("pipeline_runs.id", ondelete="CASCADE"), nullable=False, index=True
    )
    sha: Mapped[str] = mapped_column(String(64), nullable=False)
    artifact_path: Mapped[str] = mapped_column(String(512), default="", nullable=False)
    #: Exactly one release per project is live; the switch is a transaction.
    is_demo_live: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
    created_at: Mapped[datetime] = created()


class AppRuntimeRow(Base):
    """The demo container for one project (one row per project, by design)."""

    __tablename__ = "app_runtimes"
    __table_args__ = (Index("ix_app_runtime_org", "organization_id"),)

    project_id: Mapped[str] = mapped_column(
        ForeignKey("projects.id", ondelete="CASCADE"), primary_key=True
    )
    organization_id: Mapped[str] = mapped_column(
        ForeignKey("organizations.id", ondelete="CASCADE"), nullable=False, index=True
    )
    demo_container_id: Mapped[str | None] = mapped_column(String(160), nullable=True)
    host_port: Mapped[int | None] = mapped_column(Integer, nullable=True)
    demo_host: Mapped[str] = mapped_column(String(255), default="", nullable=False)
    status: Mapped[str] = mapped_column(String(16), default="provisioning", nullable=False)
    current_release_id: Mapped[str | None] = mapped_column(
        ForeignKey("releases.id", ondelete="SET NULL"), nullable=True
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=utcnow, onupdate=utcnow, nullable=False
    )


__all__ = [
    "AppRuntimeRow",
    "MAX_LOG_TAIL_CHARS",
    "PipelineRunRow",
    "PipelineStepRow",
    "ReleaseRow",
]