from typing import Any, Literal

from pydantic import BaseModel, ConfigDict, Field, HttpUrl


class StrictPayload(BaseModel):
    model_config = ConfigDict(extra="forbid")


class ReleasePayload(StrictPayload):
    release_no: str = Field(min_length=1, max_length=64)
    title: str = Field(min_length=1, max_length=128)
    change_summary: str = Field(min_length=1, max_length=1000)


class ItemPayload(StrictPayload):
    # `fund_market` 必须在列内：`admin_service` 有专门的 `FUND_MARKET_FIELDS` 校验与
    # `namespace=fund_market / config_key=default` 读取路径，缺了它会让行情配置
    # 走 API 一律 422、只能靠工具内默认值运行（曾因此被回退过一次）。
    namespace: Literal["agent_tools", "memory", "relationship", "runtime", "fund_market"]
    item_key: str = Field(min_length=1, max_length=128)
    value_json: dict[str, Any]
    schema_version: Literal["1"] = "1"


class EndpointPayload(StrictPayload):
    endpoint_code: str = Field(min_length=1, max_length=64)
    provider: str = Field(min_length=1, max_length=32)
    model_name: str = Field(min_length=1, max_length=128)
    base_url: HttpUrl
    secret_ref: str = Field(pattern=r"^env:[A-Z][A-Z0-9_]{0,100}$")
    capabilities: list[str] = Field(min_length=1, max_length=20)
    allowed_data_levels: list[str] = Field(min_length=1, max_length=20)
    context_window: int = Field(gt=0)
    timeout_ms: int = Field(default=15000, ge=100, le=120000)


class FallbackPayload(StrictPayload):
    endpoint_id: int = Field(gt=0)
    fallback_order: int = Field(ge=1, le=2)
    retryable_error_codes: list[str] = Field(default_factory=list)


class RoutingPayload(StrictPayload):
    rule_code: str = Field(min_length=1, max_length=64)
    agent_type: str = Field(min_length=2, max_length=32)
    task_type: str = Field(min_length=1, max_length=48)
    model_policy: str = Field(min_length=1, max_length=32)
    primary_endpoint_id: int = Field(gt=0)
    fallbacks: list[FallbackPayload] = Field(default_factory=list, max_length=2)
    max_attempts: int = Field(default=2, ge=1, le=3)
    latency_budget_ms: int = Field(default=15000, ge=100, le=120000)
    priority: int = Field(default=100, ge=0)


class PromptPayload(StrictPayload):
    release_id: int = Field(gt=0)
    prompt_code: str = Field(min_length=1, max_length=64)
    task_type: str = Field(min_length=1, max_length=48)
    agent_type: str | None = Field(default=None, max_length=32)
    version: int = Field(ge=1)
    system_prompt: str = Field(min_length=1, max_length=32000)
    user_prompt_template: str = Field(min_length=1, max_length=32000)
    input_schema: dict[str, Any] | None = None
    output_schema: dict[str, Any] | None = None


class IntentPayload(StrictPayload):
    agent_type: str = Field(min_length=2, max_length=32)
    intent_code: str = Field(min_length=1, max_length=64)
    intent_name: str = Field(min_length=1, max_length=128)
    description: str | None = Field(default=None, max_length=500)
    examples: list[str]
    classifier_instruction: str | None = None
    confidence_threshold: str = Field(default="0.6000", pattern=r"^(0(\.\d{1,4})?|1(\.0{1,4})?)$")
    max_clarification_rounds: int = Field(default=2, ge=0, le=10)
    transfer_on_failure: bool = True
    allowed_tools: list[str] = Field(default_factory=list)
    priority: int = Field(default=100, ge=0)
    version: int = Field(default=1, ge=1)


#: `agent_reply_template.chk_template_scene` 允许的取值。**必须逐字对齐**：
#: 此前 `ReplyPayload.scene` 只校验长度（`min_length=1, max_length=32`），
#: 于是传一个不在列内的场景会**穿过接口校验、撞上数据库 CHECK 约束**，
#: 最终以 `500` 冒出（`(3819, "Check constraint 'chk_template_scene' is violated.")`）——
#: 那本该是一次 `422` 参数校验失败。2026-09-13 由接口逐条测试发现。
ReplyScene = Literal[
    "disclaimer",
    "low_confidence",
    "compliance_block",
    "transfer",
    "model_failure",
    "system_busy",
    "clarification",
]


class ReplyPayload(StrictPayload):
    template_code: str = Field(min_length=1, max_length=64)
    scene: ReplyScene
    title: str = Field(min_length=1, max_length=128)
    content_text: str = Field(min_length=1, max_length=32000)
    variables: list[str] = Field(default_factory=list)
    locale: str = Field(default="zh-CN", max_length=16)
    version: int = Field(default=1, ge=1)


class NegativePayload(StrictPayload):
    rule_code: str = Field(min_length=1, max_length=64)
    word_pattern: str = Field(min_length=1, max_length=256)
    match_type: Literal["contains", "exact"] = "contains"
    category: str = Field(min_length=1, max_length=32)
    severity: Literal["block", "replace", "warn"] = "block"
    applicable_agents: list[str] | None = None
    safe_reply_template_code: str | None = Field(default=None, max_length=64)


class ReviewPayload(StrictPayload):
    decision: Literal["approved", "rejected"]
    comment: str = Field(default="", max_length=1000)


#: `svc_handover_ticket.status` 的取值，**必须逐字对齐数据库 CHECK 约束**
#: （`chk_handoff_status`，见 `docs/02-数据库建表设计.md` §7.2）。
#: 与 `ReplyScene` 同一个教训：不在列内的值若穿到数据库，会以 500 冒出而不是 422。
HandoverStatus = Literal[
    "pending",
    "assigned",
    "processing",
    "resolved",
    "closed",
    "cancelled",
]


class HandoverAssignPayload(StrictPayload):
    """分配工单给一个坐席（`sys_user.id`）。"""

    assignee_id: int = Field(gt=0)


class HandoverResolvePayload(StrictPayload):
    """解决工单必须给结论（`resolution` 落库）。"""

    resolution: str = Field(min_length=2, max_length=2000)


class HandoverClosePayload(StrictPayload):
    """关闭工单可选补一条说明，追加在结论之后。"""

    note: str = Field(default="", max_length=2000)


class HandoverCancelPayload(StrictPayload):
    """取消工单必须给原因（写进 `resolution`）。"""

    reason: str = Field(min_length=2, max_length=500)


class EmptyPayload(StrictPayload):
    pass