# Начальная схема: MOBILEDE_cars, MOBILEDE_images, MOBILEDE_sync_runs
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa

revision: str = "001_initial"
down_revision: Union[str, None] = None
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def _schema_name() -> str | None:
    bind = op.get_bind()
    return "public" if bind.dialect.name == "postgresql" else None


def _table_exists(table_name: str) -> bool:
    inspector = sa.inspect(op.get_bind())
    return table_name in inspector.get_table_names(schema=_schema_name())


def _index_exists(table_name: str, index_name: str) -> bool:
    if not _table_exists(table_name):
        return False
    inspector = sa.inspect(op.get_bind())
    indexes = inspector.get_indexes(table_name, schema=_schema_name())
    return any(index.get("name") == index_name for index in indexes)


def upgrade() -> None:
    # Таблица MOBILEDE_cars — аукционные машины с MOBILEDE
    if not _table_exists("MOBILEDE_cars"):
        op.create_table(
            "MOBILEDE_cars",
            sa.Column("id", sa.BigInteger, primary_key=True, autoincrement=True),
            sa.Column("parser_id", sa.String(50), nullable=False, unique=True),
            sa.Column("brand", sa.String(50), nullable=False),
            sa.Column("model", sa.String(50), nullable=False),
            sa.Column("year", sa.Integer, nullable=True),
            sa.Column("price", sa.BigInteger, nullable=True),
            sa.Column("currency", sa.String(10), nullable=False, server_default="USD"),
            sa.Column("mileage", sa.Integer, nullable=False, server_default="0"),
            sa.Column("country", sa.String(10), nullable=False, server_default="NA"),
            sa.Column("is_sold", sa.Boolean, nullable=False, server_default=sa.text("false")),
            sa.Column("color", sa.String, nullable=False, server_default="other"),
            sa.Column("drive", sa.String(10), nullable=True),
            sa.Column("gearbox", sa.String(10), nullable=True),
            sa.Column("steering_wheel", sa.String(10), nullable=True),
            sa.Column("body_type", sa.String(20), nullable=False, server_default="OTHER"),
            sa.Column("engine_volume", sa.Integer, nullable=True),
            sa.Column("selling_type", sa.String(20), nullable=False, server_default="NA"),
            sa.Column("one_owner", sa.Boolean, nullable=False, server_default=sa.text("false")),
            sa.Column("new_car", sa.Boolean, nullable=False, server_default=sa.text("false")),
            sa.Column("is_hidden", sa.Boolean, nullable=False, server_default=sa.text("false")),
            sa.Column("origin", sa.String(20), nullable=False, server_default="NA"),
            sa.Column("origin_url", sa.String, nullable=False),
            sa.Column("origin_id", sa.String, nullable=False, unique=True),
            sa.Column("is_damaged", sa.Boolean, nullable=False, server_default=sa.text("false")),
            sa.Column("evaluation", sa.String, nullable=True),
            sa.Column("non_smoking", sa.Boolean, nullable=False, server_default=sa.text("true")),
            sa.Column("rental", sa.Boolean, nullable=False, server_default=sa.text("false")),
            sa.Column("repair_history", sa.Boolean, nullable=False, server_default=sa.text("false")),
            sa.Column("slug", sa.String, nullable=False),
            sa.Column("last_seen_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
        )

    if not _index_exists("MOBILEDE_cars", "ix_MOBILEDE_cars_origin_url"):
        op.create_index("ix_MOBILEDE_cars_origin_url", "MOBILEDE_cars", ["origin_url"])
    if not _index_exists("MOBILEDE_cars", "ix_MOBILEDE_cars_origin_id"):
        op.create_index("ix_MOBILEDE_cars_origin_id", "MOBILEDE_cars", ["origin_id"], unique=True)

    # Таблица MOBILEDE_images — изображения машин
    if not _table_exists("MOBILEDE_images"):
        op.create_table(
            "MOBILEDE_images",
            sa.Column("id", sa.BigInteger, primary_key=True, autoincrement=True),
            sa.Column("fullres_image", sa.String, nullable=False),
            sa.Column("preview_image", sa.String, nullable=False),
            sa.Column("order_index", sa.Integer, nullable=False),
            sa.Column("car_id", sa.Integer, sa.ForeignKey("MOBILEDE_cars.id", ondelete="CASCADE"), nullable=False),
        )

    # Таблица MOBILEDE_sync_runs — логирование синхронизаций
    if not _table_exists("MOBILEDE_sync_runs"):
        op.create_table(
            "MOBILEDE_sync_runs",
            sa.Column("id", sa.BigInteger, primary_key=True, autoincrement=True),
            sa.Column("started_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
            sa.Column("finished_at", sa.DateTime(timezone=True), nullable=True),
            sa.Column("status", sa.Text, nullable=False),
            sa.Column("lane", sa.Text, nullable=False),
            sa.Column("ids_fetched", sa.Integer, nullable=False, server_default="0"),
            sa.Column("cars_upserted", sa.Integer, nullable=False, server_default="0"),
            sa.Column("cars_failed", sa.Integer, nullable=False, server_default="0"),
            sa.Column("images_upserted", sa.Integer, nullable=False, server_default="0"),
            sa.Column("error_summary", sa.Text, nullable=True),
        )


def downgrade() -> None:
    # Миграция оставлена только для совместимости с общей production-базой.
    pass