"""应用（应用平台 A1–A3，docs/design/app-platform-and-look.md §2.1–§2.3、§3.1–§3.6）。

App 可变（名称、草稿、授权）；AppVersion 不可变，只在发布时生成：spec（agentlab.app/1）、钉住的工作流版本（pins）、
岗位与钩子的绑定（bindings）、级别（取各钉住项里最低的那一级）、spec_hash、钉住项升版的处置（dispositions）。
授权（app_grants）和组成员不进版本，改动写审计。
"""
from __future__ import annotations

from datetime import datetime
from typing import Any

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

from app.db.base import Base, TimestampMixin, UTCDateTime, new_id, utcnow

#: 应用授权：use 能用（入口、视图、自己的实例）；observe 另能看全部实例；manage 能搭建、发布、改派
GRANT_ROLES = ("use", "observe", "manage")


class App(Base, TimestampMixin):
    __tablename__ = "apps"

    id: Mapped[str] = mapped_column(String(32), primary_key=True, default=new_id)
    name: Mapped[str] = mapped_column(String(200))
    description: Mapped[str] = mapped_column(Text, default="")
    icon: Mapped[str] = mapped_column(String(40), default="app")
    # 编辑中的 spec（agentlab.app/1），发布前随便改；发布时冻结成一个 AppVersion
    draft: Mapped[dict[str, Any]] = mapped_column(default=dict)
    # 草稿里的岗位、钩子、通知渠道绑定（发布时一并冻结进 AppVersion.bindings）
    draft_bindings: Mapped[dict[str, Any]] = mapped_column(default=dict)
    published_version: Mapped[int | None] = mapped_column(Integer, default=None)
    status: Mapped[str] = mapped_column(String(20), default="active")  # active | archived
    created_by: Mapped[str | None] = mapped_column(String(100), default=None)
    updated_by: Mapped[str | None] = mapped_column(String(100), default=None)
    # 普通用户建应用（N7）：personal 是使用者自己的个人应用，只有拥有者看得见、永远跑探索运行、没有应用版本
    scope: Mapped[str] = mapped_column(String(20), default="shared")  # shared | personal
    owner: Mapped[str | None] = mapped_column(String(100), default=None)
    # 出自哪个蓝图（共享应用经发布单生成、个人应用存蓝图时生成）
    blueprint_id: Mapped[str | None] = mapped_column(String(32), default=None)


class AppVersion(Base):
    __tablename__ = "app_versions"
    __table_args__ = (UniqueConstraint("app_id", "version"),)

    id: Mapped[str] = mapped_column(String(32), primary_key=True, default=new_id)
    app_id: Mapped[str] = mapped_column(ForeignKey("apps.id", ondelete="CASCADE"), index=True)
    version: Mapped[int] = mapped_column(Integer)
    spec: Mapped[dict[str, Any]] = mapped_column(default=dict)
    spec_hash: Mapped[str] = mapped_column(String(64))
    # [{alias, workflow_id, version, graph_hash, level, use}]，和 spec.pins 一致（冗余存一份便于反查）
    pins: Mapped[list[Any]] = mapped_column(default=list)
    # {"slots": {岗位: [{kind: user|group, name}]}, "hooks": {...}, "channels": {...}}
    bindings: Mapped[dict[str, Any]] = mapped_column(default=dict)
    level: Mapped[str] = mapped_column(String(20), default="published")  # published | governed
    # 钉住项相对上一个应用版本升了版时选的处置：{alias: "recompute" | "dual" | "incomparable"}
    dispositions: Mapped[dict[str, Any]] = mapped_column(default=dict)
    note: Mapped[str] = mapped_column(Text, default="")
    published_by: Mapped[str | None] = mapped_column(String(100), default=None)
    published_at: Mapped[datetime] = mapped_column(UTCDateTime, default=utcnow)


class AppGrant(Base):
    __tablename__ = "app_grants"
    __table_args__ = (UniqueConstraint("app_id", "principal_kind", "principal", "role"),)

    id: Mapped[str] = mapped_column(String(32), primary_key=True, default=new_id)
    app_id: Mapped[str] = mapped_column(ForeignKey("apps.id", ondelete="CASCADE"), index=True)
    principal_kind: Mapped[str] = mapped_column(String(20))  # user | group | everyone
    principal: Mapped[str] = mapped_column(String(100), default="")
    role: Mapped[str] = mapped_column(String(20), default="use")
    granted_by: Mapped[str | None] = mapped_column(String(100), default=None)
    created_at: Mapped[datetime] = mapped_column(UTCDateTime, default=utcnow)


class AppViewCache(Base):
    """按需视图的缓存。key = sha256(graph_hash, 规范化后的输入, data_versions, 能力版本)。"""

    __tablename__ = "app_view_cache"

    key: Mapped[str] = mapped_column(String(64), primary_key=True)
    app_id: Mapped[str] = mapped_column(String(32), index=True)
    view_id: Mapped[str] = mapped_column(String(100))
    run_id: Mapped[str] = mapped_column(String(32))
    created_at: Mapped[datetime] = mapped_column(UTCDateTime, default=utcnow)
    expires_at: Mapped[datetime | None] = mapped_column(default=None)


class AppHook(Base, TimestampMixin):
    """入站钩子。start：按入口发起实例；signal：按 correlation 解决一条「等外部系统」的待办。"""

    __tablename__ = "app_hooks"
    # 一个名字一行（D-g）：并发「生成密钥」不会多出第二把能用的密钥。存量库由 db/base.py 的 _UNIQUE_INDEX_MIGRATIONS 补建
    __table_args__ = (Index("ux_app_hooks_app_name", "app_id", "name", unique=True),)

    id: Mapped[str] = mapped_column(String(32), primary_key=True, default=new_id)
    app_id: Mapped[str] = mapped_column(ForeignKey("apps.id", ondelete="CASCADE"), index=True)
    name: Mapped[str] = mapped_column(String(100))
    kind: Mapped[str] = mapped_column(String(20))  # start | signal
    entry_id: Mapped[str | None] = mapped_column(String(100), default=None)
    secret: Mapped[str] = mapped_column(Text)  # 密文
    enabled: Mapped[bool] = mapped_column(default=True)


class HookReceipt(Base):
    """入站请求按 Idempotency-Key 去重的记录。"""

    __tablename__ = "hook_receipts"
    __table_args__ = (UniqueConstraint("hook_id", "idem_key"),)

    id: Mapped[str] = mapped_column(String(32), primary_key=True, default=new_id)
    hook_id: Mapped[str] = mapped_column(ForeignKey("app_hooks.id", ondelete="CASCADE"), index=True)
    idem_key: Mapped[str] = mapped_column(String(200))
    run_id: Mapped[str | None] = mapped_column(String(32), default=None)
    task_id: Mapped[str | None] = mapped_column(String(32), default=None)
    # processing（按幂等键认领、处理中）| accepted | rejected | signature（idem_key 以 sig: 开头：记一个签名用过了，防换键重放）
    status: Mapped[str] = mapped_column(String(20))
    detail: Mapped[str | None] = mapped_column(Text, default=None)
    received_at: Mapped[datetime] = mapped_column(UTCDateTime, default=utcnow)


class ApiReceipt(Base):
    """用访问密钥发起实例、刷新视图时按 Idempotency-Key 去重的记录（docs/design/next-round/04-对外集成与触达.md A4）。

    按 (拥有者, 幂等键) 唯一，不按密钥：轮换了密钥，同一个键照样认得出是同一件事。状态机和钩子的收件记录是同一套
    （process/receipts.py）：processing 认领、处理中 → accepted / rejected；停在 processing 太久的可以重新认领。钩子那张表
    （hook_receipts.hook_id 非空外键，SQLite 改不了可空性）不动，两张表各存各的、共用状态机。

    fingerprint 是这次请求的指纹（方法、路由模板、路径参数、请求体）：同一个键拿去办另一件事（换了入口、换了表单值）不交回
    上一件的结果，照实拒掉——钩子的键只在一个钩子里用，这里一个键跨所有应用和入口，撞键的可能大得多。"""

    __tablename__ = "api_receipts"
    __table_args__ = (UniqueConstraint("owner_user_id", "idem_key"),)

    id: Mapped[str] = mapped_column(String(32), primary_key=True, default=new_id)
    owner_user_id: Mapped[str] = mapped_column(String(32), index=True)
    idem_key: Mapped[str] = mapped_column(String(200))
    #: 最近一次认领它的那把密钥（轮换前后可能不同）
    key_id: Mapped[str | None] = mapped_column(String(32), default=None)
    route: Mapped[str] = mapped_column(String(300), default="")
    fingerprint: Mapped[str | None] = mapped_column(String(64), default=None)
    run_id: Mapped[str | None] = mapped_column(String(32), default=None)
    task_id: Mapped[str | None] = mapped_column(String(32), default=None)
    # processing | accepted | rejected
    status: Mapped[str] = mapped_column(String(20))
    detail: Mapped[str | None] = mapped_column(Text, default=None)
    received_at: Mapped[datetime] = mapped_column(UTCDateTime, default=utcnow)


class ViewShare(Base):
    """分享链接（docs/design/next-round/04-对外集成与触达.md C2，集成-I6）：拿到链接、不用登录就能看应用的一页（只读，
    可以嵌进门户）。

    链接写成 /s#<分享 key>：key 在 # 后面，打开页面时不发给服务器、不进访问日志和 Referer，页面读出来再放进请求头
    X-AgentLab-Share（api/shares.py）。库里只存 key 的 sha256（key_hash）和开头一截（prefix，认是哪一条），同访问密钥。

    mode：latest 始终取最近一次封存；fixed 取建分享那一刻每个视图的运行（runs：{视图 id: 运行 id}，还没有封存运行的是
    null），解析建分享时的应用版本（app_version）。到期必填、最长 90 天；撤销、到期之后打开回 410 并写明。建、撤销写审计；
    打开只计数（open_count、last_opened_at），不一次写一行。embed_allowed 为假时分享页不肯在别的页面的 iframe 里显示（服务端
    在 /s 上只能按全站的嵌入白名单 AGENTLAB_EMBED_ORIGINS 发头：打开页面那一刻还不知道是哪一条分享）。"""

    __tablename__ = "view_shares"

    id: Mapped[str] = mapped_column(String(32), primary_key=True, default=new_id)
    key_hash: Mapped[str] = mapped_column(String(64), unique=True)
    prefix: Mapped[str] = mapped_column(String(16))
    app_id: Mapped[str] = mapped_column(ForeignKey("apps.id", ondelete="CASCADE"), index=True)
    page_id: Mapped[str] = mapped_column(String(100))
    mode: Mapped[str] = mapped_column(String(20), default="latest")  # latest | fixed
    app_version: Mapped[int | None] = mapped_column(Integer, default=None)
    runs: Mapped[dict[str, Any] | None] = mapped_column(default=None)
    embed_allowed: Mapped[bool] = mapped_column(default=False)
    created_by: Mapped[str | None] = mapped_column(String(100), default=None)
    #: 建分享的人当时的显示名：分享页页脚写「由 X 分享」
    created_by_name: Mapped[str | None] = mapped_column(String(100), default=None)
    created_at: Mapped[datetime] = mapped_column(UTCDateTime, default=utcnow)
    expires_at: Mapped[datetime] = mapped_column(UTCDateTime)
    revoked_at: Mapped[datetime | None] = mapped_column(UTCDateTime, default=None)
    revoked_by: Mapped[str | None] = mapped_column(String(100), default=None)
    open_count: Mapped[int] = mapped_column(Integer, default=0)
    last_opened_at: Mapped[datetime | None] = mapped_column(UTCDateTime, default=None)