# =============================================================================
# 企微IT智能服务台 — 阶段5 自动化闭环 Schema
# =============================================================================
# 说明：定义自动化会话相关接口的 Pydantic 请求/响应模型，以及 ORM → dict
#       序列化辅助函数。所有响应沿用项目 {code, data, message} 约定，
#       此处只描述 data 结构。
# =============================================================================

from __future__ import annotations

from datetime import datetime
from typing import Any, Dict, List, Optional

from pydantic import BaseModel, Field


# --------------------------------------------------------------------------
# 请求模型
# --------------------------------------------------------------------------
class CreateSessionRequest(BaseModel):
    """创建自动化会话请求。"""

    conversation_id: Optional[str] = Field(None, description="关联工单ID（弱关联）")
    employee_id: str = Field(..., description="发起员工企微 UserID")
    description: str = Field(..., description="员工诉求/原始消息")
    mode: str = Field("real_exec", description="执行模式：plan_only / real_exec")


class ApprovalDecisionRequest(BaseModel):
    """坐席审批决策请求。"""

    decision: str = Field(..., description="approve / reject")
    note: Optional[str] = Field(None, description="审批意见")


class ConfirmRequest(BaseModel):
    """员工 H5 二次确认请求。"""

    confirmed: bool = Field(..., description="是否确认执行")
    note: Optional[str] = Field(None, description="备注")


class TakeoverRequest(BaseModel):
    """转人工接管请求。"""

    agent_id: str = Field(..., description="接管坐席ID")
    note: Optional[str] = Field(None, description="接管说明")


class ResolveFeedbackRequest(BaseModel):
    """处置结果反馈（员工是否满意）。"""

    satisfied: bool = Field(True, description="是否满意")
    note: Optional[str] = Field(None, description="反馈备注")


class ScenarioConfigUpdate(BaseModel):
    """场景配置更新请求（管理端）。"""

    name: Optional[str] = None
    description: Optional[str] = None
    enabled: Optional[bool] = None
    trigger_conditions: Optional[dict] = None
    actions: Optional[list] = None
    approval_strategy: Optional[dict] = None


# --------------------------------------------------------------------------
# 响应模型
# --------------------------------------------------------------------------
class IntentResult(BaseModel):
    """意图识别结果。"""

    scenario_key: Optional[str] = None
    confidence: float = 0.0
    raw: str = ""
    error: str = ""


class ActionResponse(BaseModel):
    """处置动作响应。"""

    id: str
    session_id: str
    action_index: int
    action_type: str
    adapter: str
    risk_level: str
    title: str
    description: str
    status: str
    payload: Optional[dict] = None
    result: Optional[dict] = None
    error: Optional[str] = None
    approved_by: Optional[str] = None
    approved_at: Optional[str] = None


class ApprovalTicketResponse(BaseModel):
    """审批单响应。"""

    id: str
    action_id: str
    session_id: str
    approver_id: Optional[str] = None
    channel: str
    status: str
    reason: Optional[str] = None
    decision_note: Optional[str] = None
    decided_at: Optional[str] = None


class SessionResponse(BaseModel):
    """自动化会话响应。"""

    id: str
    conversation_id: Optional[str] = None
    employee_id: str
    agent_id: Optional[str] = None
    scenario_key: Optional[str] = None
    status: str
    mode: str
    confidence: float
    title: str
    intent: Optional[dict] = None
    current_action_id: Optional[str] = None
    auto_close_at: Optional[str] = None
    resolved_at: Optional[str] = None
    closed_by: Optional[str] = None
    meta: Optional[dict] = None
    # 复杂场景重构：暂停时间戳
    paused_at: Optional[str] = None
    actions: List[ActionResponse] = Field(default_factory=list)
    approval: Optional[ApprovalTicketResponse] = None
    created_at: Optional[str] = None
    updated_at: Optional[str] = None


class ScenarioConfigResponse(BaseModel):
    """场景配置响应。"""

    id: str
    scenario_key: str
    name: str
    description: str
    enabled: bool
    trigger_conditions: Optional[dict] = None
    actions: Optional[list] = None
    approval_strategy: Optional[dict] = None
    current_version_id: Optional[str] = None


class RuleVersionResponse(BaseModel):
    """规则版本响应。"""

    id: str
    scenario_key: str
    version: int
    content: Optional[dict] = None
    status: str
    canary_percent: int
    created_by: Optional[str] = None
    remark: str
    created_at: Optional[str] = None


class AutoMetricsResponse(BaseModel):
    """自动化看板指标响应。"""

    total_sessions: int = 0
    resolved_sessions: int = 0
    handoff_sessions: int = 0
    error_sessions: int = 0
    auto_executed_actions: int = 0
    approval_required_actions: int = 0
    by_scenario: Dict[str, int] = Field(default_factory=dict)


# --------------------------------------------------------------------------
# 序列化辅助
# --------------------------------------------------------------------------
def _iso(dt: Optional[datetime]) -> Optional[str]:
    """将 datetime 转为 ISO 字符串（None 透传）。"""
    return dt.isoformat() if dt else None


def serialize_action(action: Any) -> ActionResponse:
    """将 AutoAction ORM 对象序列化为响应模型。"""
    return ActionResponse(
        id=action.id,
        session_id=action.session_id,
        action_index=action.action_index,
        action_type=action.action_type,
        adapter=action.adapter,
        risk_level=action.risk_level,
        title=action.title,
        description=action.description,
        status=action.status,
        payload=action.payload,
        result=action.result,
        error=action.error,
        approved_by=action.approved_by,
        approved_at=_iso(action.approved_at),
    )


def serialize_approval(ticket: Any) -> ApprovalTicketResponse:
    """将 ApprovalTicket ORM 对象序列化为响应模型。"""
    return ApprovalTicketResponse(
        id=ticket.id,
        action_id=ticket.action_id,
        session_id=ticket.session_id,
        approver_id=ticket.approver_id,
        channel=ticket.channel,
        status=ticket.status,
        reason=ticket.reason,
        decision_note=ticket.decision_note,
        decided_at=_iso(ticket.decided_at),
    )


def serialize_session(
    session: Any,
    actions: Optional[List[Any]] = None,
    ticket: Optional[Any] = None,
) -> SessionResponse:
    """将 AutoSession ORM 对象序列化为响应模型。"""
    return SessionResponse(
        id=session.id,
        conversation_id=session.conversation_id,
        employee_id=session.employee_id,
        agent_id=session.agent_id,
        scenario_key=session.scenario_key,
        status=session.status,
        mode=session.mode,
        confidence=session.confidence,
        title=session.title,
        intent=session.intent,
        current_action_id=session.current_action_id,
        auto_close_at=_iso(session.auto_close_at),
        resolved_at=_iso(session.resolved_at),
        closed_by=session.closed_by,
        meta=session.meta,
        paused_at=_iso(session.paused_at),
        actions=[serialize_action(a) for a in (actions or [])],
        approval=serialize_approval(ticket) if ticket else None,
        created_at=_iso(session.created_at),
        updated_at=_iso(session.updated_at),
    )


# ===========================================================================
# 复杂场景重构第一阶段 — 新增 Schema
# ===========================================================================

# --------------------------------------------------------------------------
# 全局意图识别结果（扩展 IntentResult）
# --------------------------------------------------------------------------
class GlobalIntentResult(BaseModel):
    """全局意图识别结果。"""

    global_intent: Optional[str] = None  # pause / resume_task / correct / supplement / null
    scenario_key: Optional[str] = None   # 未命中全局意图时走场景识别
    confidence: float = 0.0
    corrected_field: Optional[str] = None    # CORRECT: 更正的字段名
    old_value: Optional[str] = None          # CORRECT: 旧值
    new_value: Optional[str] = None          # CORRECT: 新值
    supplement_field: Optional[str] = None   # SUPPLEMENT: 补充的字段名
    supplement_value: Optional[str] = None   # SUPPLEMENT: 补充的值
    raw: str = ""
    error: str = ""


# --------------------------------------------------------------------------
# 请求模型（复杂场景重构）
# --------------------------------------------------------------------------
class PauseRequest(BaseModel):
    """暂停会话请求（通常由意图识别触发，也可直接调用）。"""

    reason: Optional[str] = None


class ResumeRequest(BaseModel):
    """恢复会话请求。"""

    session_id: Optional[str] = None  # 多任务时指定恢复哪个；None 则自动选择唯一的


class CorrectRequest(BaseModel):
    """信息更正请求。"""

    field: str = Field(..., description="更正的字段名")
    new_value: str = Field(..., description="新值")
    old_value: Optional[str] = None


class SupplementRequest(BaseModel):
    """信息补充请求。"""

    field: str = Field(..., description="补充的字段名")
    value: str = Field(..., description="补充的值")


class AgentResumeRequest(BaseModel):
    """坐席代恢复请求。"""

    note: Optional[str] = None


class AgentCloseRequest(BaseModel):
    """坐席关闭会话请求。"""

    note: Optional[str] = None


# --------------------------------------------------------------------------
# 响应模型（复杂场景重构）
# --------------------------------------------------------------------------
class InformationItemResponse(BaseModel):
    """信息项响应。"""

    id: str
    session_id: str
    name: str
    value: str
    modifiers: List[str] = Field(default_factory=list)
    is_filled: bool
    is_locked: bool
    version: int
    update_history: List[dict] = Field(default_factory=list)
    updated_at: Optional[str] = None


class ResumePointResponse(BaseModel):
    """恢复点响应。"""

    session_id: str
    title: str
    scenario_key: Optional[str] = None
    current_step: str
    paused_at: Optional[str] = None
    pending_items: List[str] = Field(default_factory=list)
    info_items: List[InformationItemResponse] = Field(default_factory=list)


class PausedSessionItem(BaseModel):
    """暂停会话列表项。"""

    session_id: str
    title: str
    scenario_key: Optional[str] = None
    paused_at: Optional[str] = None
    paused_duration: str = ""  # 如 "2h 15min"


# --------------------------------------------------------------------------
# 序列化辅助（复杂场景重构）
# --------------------------------------------------------------------------
def serialize_information_item(item: Any) -> InformationItemResponse:
    """将 InformationItem ORM 对象序列化为响应模型。"""
    return InformationItemResponse(
        id=item.id,
        session_id=item.session_id,
        name=item.name,
        value=item.value,
        modifiers=item.modifiers or [],
        is_filled=item.is_filled,
        is_locked=item.is_locked,
        version=item.version,
        update_history=item.update_history or [],
        updated_at=_iso(item.updated_at),
    )


# ===========================================================================
# 复杂场景重构第二阶段 — P2/P3 新增 Schema
# ===========================================================================

# --------------------------------------------------------------------------
# P3 请求模型
# --------------------------------------------------------------------------
class BatchCorrectRequest(BaseModel):
    """批量更正请求。"""

    corrections: List[dict] = Field(
        ..., description="更正列表 [{field, new_value, old_value?}, ...]"
    )
    reason: Optional[str] = Field(None, description="更正备注")


class UndoCorrectionRequest(BaseModel):
    """撤销更正请求。"""

    pass  # 无参数，撤销最近一次更正


class VersionDiffRequest(BaseModel):
    """版本对比请求。"""

    v1: int = Field(..., description="版本号1")
    v2: int = Field(..., description="版本号2")


# --------------------------------------------------------------------------
# P3 响应模型
# --------------------------------------------------------------------------
class BatchCorrectResponse(BaseModel):
    """批量更正响应。"""

    corrected_items: List[dict] = Field(default_factory=list)
    snapshot_id: int
    dependency_warnings: List[dict] = Field(default_factory=list)


class UndoCorrectionResponse(BaseModel):
    """撤销更正响应。"""

    undone_items: List[str] = Field(default_factory=list)
    restored_values: Dict[str, str] = Field(default_factory=dict)
    snapshot_id: int
    remaining_undo_count: int = 5


class CorrectionHistoryResponse(BaseModel):
    """更正历史响应。"""

    history: List[dict] = Field(default_factory=list)


class VersionChainResponse(BaseModel):
    """版本链响应。"""

    item_key: str
    chain: List[dict] = Field(default_factory=list)


class VersionDiffResponse(BaseModel):
    """版本对比响应。"""

    item_key: str
    v1: int
    v1_value: str
    v2: int
    v2_value: str
    changed: bool


# --------------------------------------------------------------------------
# P2 响应模型
# --------------------------------------------------------------------------
class CompressionLogItem(BaseModel):
    """压缩日志项。"""

    id: int
    session_id: str
    tokens_before: int
    tokens_after: int
    compression_ratio: float
    task_node: Optional[str] = None
    duration_ms: int
    compression_level: int
    summary: Optional[str] = None
    created_at: Optional[str] = None


class CompressionLogListResponse(BaseModel):
    """压缩日志列表响应。"""

    logs: List[CompressionLogItem] = Field(default_factory=list)
    total: int = 0