from __future__ import annotations

from datetime import datetime

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

from app.enums.private_portrait import (
    PrivatePortraitAssetStatus,
    PrivatePortraitAssetType,
    PrivatePortraitLibraryType,
    PrivatePortraitRemoteDeleteStatus,
)
from app.models.base import Base, SoftDeleteMixin, TimestampMixin


class PrivatePortraitAsset(Base, TimestampMixin, SoftDeleteMixin):
    """火山 Asset 本地映射。生成时只信任本地 id，再批量解析成 asset://remote_asset_id。"""

    __tablename__ = "private_portrait_assets"
    __table_args__ = (
        Index("uq_private_portrait_assets_remote_asset_id", "remote_asset_id", unique=True),
        Index("idx_private_portrait_assets_user_library_status_created", "user_id", "library_type", "status", "created_at"),
        Index("idx_private_portrait_assets_user_status_created", "user_id", "status", "created_at"),
        Index("idx_private_portrait_assets_project_status_created", "project_id", "status", "created_at"),
        Index("idx_private_portrait_assets_group_status_created", "group_id", "status", "created_at"),
        Index("idx_private_portrait_assets_remote_project_name", "remote_project_name"),
        Index("idx_private_portrait_assets_library_type", "library_type"),
        Index("idx_private_portrait_assets_asset_type", "asset_type"),
        Index(
            "idx_private_portrait_assets_next_poll_status",
            "next_poll_at",
            "status",
            postgresql_where=text("deleted_at IS NULL AND next_poll_at IS NOT NULL"),
        ),
        Index("idx_private_portrait_assets_remote_delete_status", "remote_delete_status"),
    )

    id: Mapped[str] = mapped_column(String(32), primary_key=True)
    user_id: Mapped[str] = mapped_column(String(32), ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True)
    project_id: Mapped[str] = mapped_column(String(32), ForeignKey("private_portrait_projects.id", ondelete="CASCADE"), nullable=False, index=True)
    group_id: Mapped[str] = mapped_column(String(32), ForeignKey("private_portrait_asset_groups.id", ondelete="CASCADE"), nullable=False, index=True)
    library_type: Mapped[str] = mapped_column(
        String(32),
        nullable=False,
        default=PrivatePortraitLibraryType.REAL_PERSON.value,
        server_default=PrivatePortraitLibraryType.REAL_PERSON.value,
        index=True,
    )
    remote_group_id: Mapped[str] = mapped_column(String(128), nullable=False, index=True)
    remote_asset_id: Mapped[str | None] = mapped_column(String(128), nullable=True, index=True)
    remote_project_name: Mapped[str] = mapped_column(String(256), nullable=False, index=True)
    asset_type: Mapped[str] = mapped_column(String(16), nullable=False, default=PrivatePortraitAssetType.IMAGE.value, index=True)
    name: Mapped[str | None] = mapped_column(String(128), nullable=True, index=True)
    source_url: Mapped[str] = mapped_column(Text, nullable=False)
    preview_url: Mapped[str | None] = mapped_column(Text, nullable=True)
    remote_url: Mapped[str | None] = mapped_column(Text, nullable=True)
    remote_url_expired_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    video_duration: Mapped[float | None] = mapped_column(Float, nullable=True, comment="视频素材时长，秒")
    video_cover_url: Mapped[str | None] = mapped_column(Text, nullable=True, comment="视频素材封面预览地址")
    file_size: Mapped[int | None] = mapped_column(Integer, nullable=True, comment="素材文件大小，字节")
    mime_type: Mapped[str | None] = mapped_column(String(128), nullable=True)
    status: Mapped[str] = mapped_column(
        String(32),
        nullable=False,
        default=PrivatePortraitAssetStatus.CREATING.value,
        server_default=PrivatePortraitAssetStatus.CREATING.value,
        index=True,
    )
    moderation_json: Mapped[str | None] = mapped_column(Text, nullable=True)
    last_poll_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    next_poll_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, index=True)
    poll_count: Mapped[int] = mapped_column(Integer, nullable=False, default=0, server_default="0")
    remote_delete_status: Mapped[str] = mapped_column(
        String(32),
        nullable=False,
        default=PrivatePortraitRemoteDeleteStatus.NONE.value,
        server_default=PrivatePortraitRemoteDeleteStatus.NONE.value,
        index=True,
    )
    remote_deleted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    remote_delete_error: Mapped[str | None] = mapped_column(Text, nullable=True)
    error_message: Mapped[str | None] = mapped_column(Text, nullable=True)
    raw_response_json: Mapped[str | None] = mapped_column(Text, nullable=True)