"""账户资源域 Router（AL-01~AL-04 + ACC-01 runtime-status + P0缺口）。

本 router 实现渠道账户生命周期的全部 HTTP 端点，覆盖创建 / 查询 / 更新 /
删除 / 启用 / 禁用 / 运行时状态查询 / 凭据轮换 / 连通性测试共 10 个操作。所有端点统一采用模板 A
（控制面端口路由），通过 ``get_channel_use_cases`` 装配 ``ChannelUseCases``，
经 ``account_management`` 端口调用类型化方法，由 ``ChannelControlService._executeControl``
内部走控制面管道（auth → permission → rate_limit → dispatch → audit）。

鉴权策略：全部端点使用 ``get_admin_user`` 依赖，要求管理员或超级管理员角色。
角色校验由依赖函数完成，router 内不做角色判断（规范 §4）。

路径设计：静态跨渠道查询 ``GET /accounts`` 与 ``POST /accounts/batch/*`` 先于
动态路径 ``/{channel_type}/...`` 声明（规范 §6.5），避免静态路径被动态参数
捕获。子 router 不自行设置 prefix，根前缀 ``/channels`` 由 ``channels_router``
聚合 router 统一追加。

端点清单（对应《01-账户资源域设计方案》§2.1 + P0/P1缺口补全）：
    - GET    /accounts                                          ACC-AL-01 list_accounts
    - POST   /accounts/batch/enable                             ACC-BATCH-STATE batch_enable_accounts
    - POST   /accounts/batch/disable                            ACC-BATCH-STATE batch_disable_accounts
    - POST   /{channel_type}/accounts                           ACC-AL-02 create_account
    - GET    /{channel_type}/accounts/{account_id}              ACC-AL-01 get_account
    - PUT    /{channel_type}/accounts/{account_id}              ACC-AL-03 update_account
    - DELETE /{channel_type}/accounts/{account_id}              ACC-AL-04 delete_account
    - POST   /{channel_type}/accounts/{account_id}/enable       ACC-STATE-01 enable_account
    - POST   /{channel_type}/accounts/{account_id}/disable      ACC-STATE-02 disable_account
    - POST   /{channel_type}/accounts/{account_id}/recover      ACC-STATE-03 recover_account
    - GET    /{channel_type}/accounts/{account_id}/runtime-status ACC-01 get_account_runtime_status
    - POST   /{channel_type}/accounts/{account_id}/rotate-credentials ACC-ROTATE-01 rotate_credentials
    - POST   /{channel_type}/accounts/{account_id}/test-connection ACC-TEST-01 test_connection
    - GET    /{channel_type}/accounts/{account_id}/export       ACC-EXPORT export_account
    - POST   /{channel_type}/accounts/{account_id}/clone        ACC-CLONE clone_account
"""

from __future__ import annotations

from typing import Any

from fastapi import APIRouter, Depends, Query, Request
from pydantic import BaseModel, ConfigDict, Field, model_validator
from yuxi.channels.contract.dtos.channel import (
    BatchStateChangeCmd,
    ChannelType,
    CloneAccountCmd,
)
from yuxi.channels.contract.errors import ValidationError
from yuxi.storage.postgres.models_business import User

from server.routers.channels import (
    build_operator,
    get_channel_use_cases,
    raiseOnControlFailure,
    serialize_control_data,
)
from server.utils.auth_middleware import get_admin_user

account_router = APIRouter(tags=["channels-account"])


# ---------------- Request Schemas ----------------


class CreateAccountRequest(BaseModel):
    """创建账户请求。字段对齐 ``AccountManagementPort.createAccount`` 入参。"""

    model_config = ConfigDict(frozen=True)

    display_name: str = Field(
        ...,
        min_length=1,
        max_length=128,
        description="账户显示名称",
    )
    raw_config: dict[str, Any] = Field(
        ...,
        description="渠道原始配置（由插件校验）",
    )


class UpdateAccountRequest(BaseModel):
    """更新账户请求。字段对齐 ``AccountManagementPort.updateAccount`` 入参。

    ``display_name`` 与 ``raw_config`` 均可选，但至少一个非空（由
    ``_require_at_least_one`` 校验器保证），否则抛 ``ValidationError``。
    """

    model_config = ConfigDict(frozen=True)

    display_name: str | None = Field(
        default=None,
        min_length=1,
        max_length=128,
        description="账户显示名称",
    )
    raw_config: dict[str, Any] | None = Field(
        default=None,
        description="渠道原始配置",
    )

    @model_validator(mode="after")
    def _require_at_least_one(self) -> UpdateAccountRequest:
        """校验至少一个字段非空。

        两个字段均为 ``None`` 时抛 ``ValidationError``（规范 §6.3 跨字段校验）。
        由于 ``ValidationError`` 继承 ``ValueError``，Pydantic v2 会将其包装为
        ``RequestValidationError``，由全局处理器统一映射为 422 + 统一格式响应。
        """
        if self.display_name is None and self.raw_config is None:
            raise ValidationError(
                "display_name",
                "at least one of display_name or raw_config must be provided",
            )
        return self


class BatchStateChangeRequest(BaseModel):
    """批量启停账户请求体（ACC-BATCH-STATE）。

    ``account_ids`` 与 ``filter`` 二选一：二者不可同时为空，亦不可同时
    提供（schema 层强制互斥，避免歧义）。``action`` 由端点路径决定
    （``enable`` / ``disable``），不在 body 中。
    """

    model_config = ConfigDict(frozen=True)

    account_ids: list[str] | None = Field(
        default=None,
        description="显式账户 ID 列表（与 filter 二选一）",
    )
    filter: dict[str, Any] | None = Field(
        default=None,
        description="筛选条件（含 channel_type / status）",
    )
    reason: str | None = Field(default=None, max_length=512, description="操作原因（审计用）")

    @model_validator(mode="after")
    def _require_exclusive_one_of(self) -> BatchStateChangeRequest:
        """校验 ``account_ids`` 与 ``filter`` 互斥且至少一个非空。

        二者均为空时抛 ``ValidationError``（缺目标），二者均非空时抛
        ``ValidationError``（互斥违反，避免 ``filter`` 字段被静默忽略）。
        """
        has_ids = bool(self.account_ids)
        has_filter = bool(self.filter)
        if not has_ids and not has_filter:
            raise ValidationError(
                "account_ids",
                "either account_ids or filter must be provided",
            )
        if has_ids and has_filter:
            raise ValidationError(
                "account_ids",
                "account_ids and filter are mutually exclusive",
            )
        return self


class CloneAccountRequest(BaseModel):
    """克隆账户请求体（ACC-CLONE）。

    ``channel_type`` 与源 ``account_id`` 由路径参数提供，不在 body 中。
    新账户默认为 DISABLED 状态，需手动 enable。
    """

    model_config = ConfigDict(frozen=True)

    new_display_name: str = Field(..., min_length=1, max_length=128, description="新账户显示名")
    new_raw_config_overrides: dict[str, Any] | None = Field(
        default=None,
        description="配置覆盖项（可选，按字段覆盖源账户配置）",
    )
    include_credentials: bool = Field(default=False, description="是否克隆凭据（默认 False）")


# ---------------- Endpoints ----------------


@account_router.get("/accounts", response_model=dict)
async def list_accounts(
    request: Request,
    channel_type: ChannelType | None = Query(
        default=None,
        description="按渠道类型过滤",
    ),
    limit: int = Query(default=1000, ge=1, le=1000, description="分页大小"),
    offset: int = Query(default=0, ge=0, description="分页偏移"),
    use_cases=Depends(get_channel_use_cases),
    current_user: User = Depends(get_admin_user),
) -> dict[str, Any]:
    """列出已配置的机器人账号（AL-01）。

    支持按渠道类型过滤与分页。对应控制面操作 ``account/list``（由
    ``ChannelControlService.listAccounts`` 内部构造 ``ControlCmd`` 并
    委托 ``_executeControl`` 执行控制面管道）。
    """
    operator = build_operator(current_user, request)
    result = await use_cases.account_management.listAccounts(
        channel_type=channel_type,
        operator=operator,
        limit=limit,
        offset=offset,
    )
    raiseOnControlFailure(result)
    return {"success": True, "data": serialize_control_data(result.data)}


@account_router.post("/accounts/batch/enable", response_model=dict)
async def batch_enable_accounts(
    payload: BatchStateChangeRequest,
    request: Request,
    use_cases=Depends(get_channel_use_cases),
    current_user: User = Depends(get_admin_user),
) -> dict[str, Any]:
    """批量启用渠道账户（ACC-BATCH-STATE，action=enable）。

    支持 ``account_ids`` 显式列表或 ``filter`` 筛选条件两种模式（二者
    互斥，由 schema 校验）。逐条独立事务复用单条 ``enableAccount`` 逻辑
    （模式 D），单条失败不回滚已成功条目。幂等：已 active 直接计入成功。
    整体返回 ``success``，部分失败信息在 ``data.failed`` 列表中，客户端
    需检查该列表。对应控制面操作 ``account/batch_enable``。

    静态路径先于 ``/{channel_type}/accounts`` 声明，避免被动态参数捕获。
    """
    operator = build_operator(current_user, request)
    cmd = BatchStateChangeCmd(
        action="enable",
        operator=operator,
        account_ids=tuple(payload.account_ids) if payload.account_ids else (),
        filter=payload.filter,
        reason=payload.reason,
    )
    result = await use_cases.account_management.batchEnableAccounts(cmd)
    raiseOnControlFailure(result)
    return {"success": True, "data": serialize_control_data(result.data)}


@account_router.post("/accounts/batch/disable", response_model=dict)
async def batch_disable_accounts(
    payload: BatchStateChangeRequest,
    request: Request,
    use_cases=Depends(get_channel_use_cases),
    current_user: User = Depends(get_admin_user),
) -> dict[str, Any]:
    """批量禁用渠道账户（ACC-BATCH-STATE，action=disable）。

    支持 ``account_ids`` 显式列表或 ``filter`` 筛选条件两种模式（二者
    互斥，由 schema 校验）。逐条独立事务复用单条 ``disableAccount`` 逻辑
    （模式 D），单条失败不回滚已成功条目。幂等：已 disabled 直接计入成功。
    整体返回 ``success``，部分失败信息在 ``data.failed`` 列表中，客户端
    需检查该列表。对应控制面操作 ``account/batch_disable``。

    静态路径先于 ``/{channel_type}/accounts`` 声明，避免被动态参数捕获。
    """
    operator = build_operator(current_user, request)
    cmd = BatchStateChangeCmd(
        action="disable",
        operator=operator,
        account_ids=tuple(payload.account_ids) if payload.account_ids else (),
        filter=payload.filter,
        reason=payload.reason,
    )
    result = await use_cases.account_management.batchDisableAccounts(cmd)
    raiseOnControlFailure(result)
    return {"success": True, "data": serialize_control_data(result.data)}


@account_router.post("/{channel_type}/accounts", response_model=dict)
async def create_account(
    channel_type: ChannelType,
    payload: CreateAccountRequest,
    request: Request,
    use_cases=Depends(get_channel_use_cases),
    current_user: User = Depends(get_admin_user),
) -> dict[str, Any]:
    """创建机器人账号（AL-02）。

    对应控制面操作 ``account/create``（由 ``ChannelControlService.createAccount``
    内部构造 ``ControlCmd`` 并委托 ``_executeControl`` 执行控制面管道）。
    ``raw_config`` 由对应渠道插件的 ``LifecycleAdapter`` 校验。
    """
    operator = build_operator(current_user, request)
    result = await use_cases.account_management.createAccount(
        channel_type=channel_type,
        raw_config=payload.raw_config,
        display_name=payload.display_name,
        operator=operator,
    )
    raiseOnControlFailure(result)
    return {"success": True, "data": serialize_control_data(result.data)}


@account_router.get("/{channel_type}/accounts/{account_id}", response_model=dict)
async def get_account(
    channel_type: ChannelType,
    account_id: str,
    request: Request,
    use_cases=Depends(get_channel_use_cases),
    current_user: User = Depends(get_admin_user),
) -> dict[str, Any]:
    """查看账户详情（AL-01）。配置字段已脱敏。

    对应控制面操作 ``account/get``（由 ``ChannelControlService.getAccount``
    内部构造 ``ControlCmd`` 并委托 ``_executeControl`` 执行控制面管道）。
    """
    operator = build_operator(current_user, request)
    result = await use_cases.account_management.getAccount(
        channel_type=channel_type,
        account_id=account_id,
        operator=operator,
    )
    raiseOnControlFailure(result)
    return {"success": True, "data": serialize_control_data(result.data)}


@account_router.put("/{channel_type}/accounts/{account_id}", response_model=dict)
async def update_account(
    channel_type: ChannelType,
    account_id: str,
    payload: UpdateAccountRequest,
    request: Request,
    use_cases=Depends(get_channel_use_cases),
    current_user: User = Depends(get_admin_user),
) -> dict[str, Any]:
    """更新账户配置（AL-03）。

    对应控制面操作 ``account/update``（由 ``ChannelControlService.updateAccount``
    内部构造 ``ControlCmd`` 并委托 ``_executeControl`` 执行控制面管道）。
    至少传入 ``display_name`` 或 ``raw_config`` 之一（由 schema 校验）。
    """
    operator = build_operator(current_user, request)
    result = await use_cases.account_management.updateAccount(
        channel_type=channel_type,
        account_id=account_id,
        raw_config=payload.raw_config,
        display_name=payload.display_name,
        operator=operator,
    )
    raiseOnControlFailure(result)
    return {"success": True, "data": serialize_control_data(result.data)}


@account_router.delete("/{channel_type}/accounts/{account_id}", response_model=dict)
async def delete_account(
    channel_type: ChannelType,
    account_id: str,
    request: Request,
    use_cases=Depends(get_channel_use_cases),
    current_user: User = Depends(get_admin_user),
) -> dict[str, Any]:
    """下线并删除账户（AL-04）。删除前触发 beforeAccountDelete 回调。

    对应控制面操作 ``account/delete``（由 ``ChannelControlService.deleteAccount``
    内部构造 ``ControlCmd`` 并委托 ``_executeControl`` 执行控制面管道）。
    删除成功后 ``result.data`` 可能为 ``None``，统一返回 ``null``。
    """
    operator = build_operator(current_user, request)
    result = await use_cases.account_management.deleteAccount(
        channel_type=channel_type,
        account_id=account_id,
        operator=operator,
    )
    raiseOnControlFailure(result)
    return {"success": True, "data": serialize_control_data(result.data)}


@account_router.post("/{channel_type}/accounts/{account_id}/enable", response_model=dict)
async def enable_account(
    channel_type: ChannelType,
    account_id: str,
    request: Request,
    use_cases=Depends(get_channel_use_cases),
    current_user: User = Depends(get_admin_user),
) -> dict[str, Any]:
    """启用账户（ACC-STATE-01）。幂等：已 active 直接返回成功。

    对应控制面操作 ``account/enable``（由 ``ChannelControlService.enableAccount``
    内部构造 ``ControlCmd`` 并委托 ``_executeControl`` 执行控制面管道）。
    """
    operator = build_operator(current_user, request)
    result = await use_cases.account_management.enableAccount(
        channel_type=channel_type,
        account_id=account_id,
        operator=operator,
    )
    raiseOnControlFailure(result)
    return {"success": True, "data": serialize_control_data(result.data)}


@account_router.post("/{channel_type}/accounts/{account_id}/disable", response_model=dict)
async def disable_account(
    channel_type: ChannelType,
    account_id: str,
    request: Request,
    use_cases=Depends(get_channel_use_cases),
    current_user: User = Depends(get_admin_user),
) -> dict[str, Any]:
    """禁用账户（ACC-STATE-02）。幂等：已 disabled 直接返回成功。

    对应控制面操作 ``account/disable``（由 ``ChannelControlService.disableAccount``
    内部构造 ``ControlCmd`` 并委托 ``_executeControl`` 执行控制面管道）。
    """
    operator = build_operator(current_user, request)
    result = await use_cases.account_management.disableAccount(
        channel_type=channel_type,
        account_id=account_id,
        operator=operator,
    )
    raiseOnControlFailure(result)
    return {"success": True, "data": serialize_control_data(result.data)}


@account_router.post("/{channel_type}/accounts/{account_id}/recover", response_model=dict)
async def recover_account(
    channel_type: ChannelType,
    account_id: str,
    request: Request,
    use_cases=Depends(get_channel_use_cases),
    current_user: User = Depends(get_admin_user),
) -> dict[str, Any]:
    """恢复降级账户（ACC-STATE-03）。幂等：已 active 直接返回成功。

    对应控制面操作 ``account/recover``（由 ``ChannelControlService.recoverAccount``
    内部构造 ``ControlCmd`` 并委托 ``_executeControl`` 执行控制面管道）。

    业务用途：DEGRADED 状态的账户无法通过 ``enable`` 恢复（聚合根
    ``enable()`` 在 DEGRADED 状态抛 RuleViolationError），必须通过本端点恢复。
    """
    operator = build_operator(current_user, request)
    result = await use_cases.account_management.recoverAccount(
        channel_type=channel_type,
        account_id=account_id,
        operator=operator,
    )
    raiseOnControlFailure(result)
    return {"success": True, "data": serialize_control_data(result.data)}


@account_router.get(
    "/{channel_type}/accounts/{account_id}/runtime-status",
    response_model=dict,
)
async def get_account_runtime_status(
    channel_type: ChannelType,
    account_id: str,
    request: Request,
    use_cases=Depends(get_channel_use_cases),
    current_user: User = Depends(get_admin_user),
) -> dict[str, Any]:
    """查询账户运行时状态（AC-32）。

    返回账户状态机、熔断器状态、登录态、降级标记。对应控制面操作
    ``account/runtime_status``（由 ``ChannelControlService.getAccountRuntimeStatus``
    内部构造 ``ControlCmd`` 并委托 ``_executeControl`` 执行控制面管道）。
    """
    operator = build_operator(current_user, request)
    result = await use_cases.account_management.getAccountRuntimeStatus(
        channel_type=channel_type,
        account_id=account_id,
        operator=operator,
    )
    raiseOnControlFailure(result)
    return {"success": True, "data": serialize_control_data(result.data)}


@account_router.post(
    "/{channel_type}/accounts/{account_id}/rotate-credentials",
    response_model=dict,
)
async def rotate_credentials(
    channel_type: ChannelType,
    account_id: str,
    request: Request,
    use_cases=Depends(get_channel_use_cases),
    current_user: User = Depends(get_admin_user),
) -> dict[str, Any]:
    """轮换渠道账户凭据（ACC-ROTATE-01）。

    触发渠道账户凭据轮换流程，用于合规性凭据更新场景。
    对应控制面操作 ``account/rotate_credentials``。
    """
    operator = build_operator(current_user, request)
    result = await use_cases.account_management.rotateCredentials(
        channel_type=channel_type,
        account_id=account_id,
        operator=operator,
    )
    raiseOnControlFailure(result)
    return {"success": True, "data": serialize_control_data(result.data)}


@account_router.post(
    "/{channel_type}/accounts/{account_id}/test-connection",
    response_model=dict,
)
async def test_connection(
    channel_type: ChannelType,
    account_id: str,
    request: Request,
    use_cases=Depends(get_channel_use_cases),
    current_user: User = Depends(get_admin_user),
) -> dict[str, Any]:
    """测试渠道账户连通性（ACC-TEST-01）。

    验证账户凭据有效性与API连通性，返回连通性检查结果。
    对应控制面操作 ``account/test_connection``。
    """
    operator = build_operator(current_user, request)
    result = await use_cases.account_management.testConnection(
        channel_type=channel_type,
        account_id=account_id,
        operator=operator,
    )
    raiseOnControlFailure(result)
    return {"success": True, "data": serialize_control_data(result.data)}


@account_router.get(
    "/{channel_type}/accounts/{account_id}/export",
    response_model=dict,
)
async def export_account(
    channel_type: ChannelType,
    account_id: str,
    request: Request,
    include_secrets: bool = Query(
        default=False,
        description="是否包含敏感凭据（True 时需超级管理员权限）",
    ),
    use_cases=Depends(get_channel_use_cases),
    current_user: User = Depends(get_admin_user),
) -> dict[str, Any]:
    """导出账户配置（ACC-EXPORT）。

    查询账户配置并按 ``include_secrets`` 决定是否脱敏：``include_secrets=False``
    时经 MaskingPort 遮蔽敏感字段；``include_secrets=True`` 时需超级管理员
    权限，返回含凭据的原始配置。对应控制面操作 ``account/export``。
    """
    operator = build_operator(current_user, request)
    result = await use_cases.account_management.exportAccount(
        channel_type=channel_type,
        account_id=account_id,
        operator=operator,
        include_secrets=include_secrets,
    )
    raiseOnControlFailure(result)
    return {"success": True, "data": serialize_control_data(result.data)}


@account_router.post(
    "/{channel_type}/accounts/{account_id}/clone",
    response_model=dict,
)
async def clone_account(
    channel_type: ChannelType,
    account_id: str,
    payload: CloneAccountRequest,
    request: Request,
    use_cases=Depends(get_channel_use_cases),
    current_user: User = Depends(get_admin_user),
) -> dict[str, Any]:
    """克隆账户（ACC-CLONE）。

    基于源账户配置创建新账户：查询源账户 → 调用 ``ChannelAccount.clone()``
    聚合根方法 → 持久化 → 触发 ``afterAccountConfigWritten`` 回调
    （best-effort）。新账户默认为 DISABLED 状态，需手动 enable。对应
    控制面操作 ``account/clone``。

    协议翻译：路径参数 ``channel_type`` / ``account_id``（源账户）与 body
    字段组合为 ``CloneAccountCmd``。
    """
    operator = build_operator(current_user, request)
    cmd = CloneAccountCmd(
        channel_type=channel_type,
        account_id=account_id,
        new_display_name=payload.new_display_name,
        operator=operator,
        new_raw_config_overrides=payload.new_raw_config_overrides,
        include_credentials=payload.include_credentials,
    )
    result = await use_cases.account_management.cloneAccount(cmd)
    raiseOnControlFailure(result)
    return {"success": True, "data": serialize_control_data(result.data)}