from __future__ import annotations

from datetime import datetime
from typing import List, Optional
from uuid import uuid4

from pydantic import BaseModel, Field


def generate_id() -> str:
    """Generate deterministic-looking ids for templates and categories."""
    return uuid4().hex


class VariableDefinition(BaseModel):
    """Schema describing each dynamic input value for a template."""

    name: str = Field(..., description="变量唯一名称，用于在模板中引用")
    label: str = Field(..., description="变量可视化展示名称")
    description: Optional[str] = Field(None, description="变量说明提示")
    prerequisite: Optional[str] = Field(None, description="变量前提条件，如 rerank_reason=PIN_CONSECUTIVE")
    preview_value: Optional[str] = Field(None, description="预览时的示例值")
    data_type: str = Field(
        "string",
        description="变量类型, 例如 string/number/boolean/options",
    )
    required: bool = Field(False, description="是否为必填字段")
    default: Optional[str] = Field(None, description="默认值")


class TemplateBase(BaseModel):
    name: str
    category: str
    device_type: str = Field(..., description="设备类型：wash(洗涤)/dry(干衣)")
    machine_model: str = Field(..., description="机型标识，如 x11/hplus/ultra/f2_multi/seeker/x11_ultra")
    template_type: str = Field(..., description="模板类型：common/time_popular/time_custom/time_season/time_care/time_environmental/time_weather/time_health")
    type_id: Optional[str] = Field(None, description="机型硬件ID，如 201c51890c31c3080501002180083900000000000000000000000000000040")
    zone_ids: List[str] = Field(default_factory=list, description="区域ID列表，如 ['2','3']")
    card_type: str = Field("single_card", description="卡片类型：single_card/multi_card")
    redis_key_second: Optional[str] = Field(None, description="Redis二级key，如 broadcast-template-jinja:single_card:wash:common")
    redis_keys_first: List[str] = Field(default_factory=list, description="Redis一级key列表（由type_id+zone_id+card_type+recommend_type组合生成）")
    reusable_from: Optional[str] = Field(None, description="复用来源模板ID，如果为空则为独立模板")
    reuse_targets: List[str] = Field(default_factory=list, description="被哪些模板复用（目标模板ID列表）")
    description: Optional[str] = None
    output_description: Optional[str] = None
    call_method: Optional[str] = None
    input_variables: List[VariableDefinition] = Field(default_factory=list)
    template_body: str = Field(..., description="Jinja2 模板正文")


class TemplateCreate(TemplateBase):
    pass


class TemplateUpdate(BaseModel):
    name: Optional[str] = None
    category: Optional[str] = None
    device_type: Optional[str] = None
    machine_model: Optional[str] = None
    template_type: Optional[str] = None
    type_id: Optional[str] = None
    zone_ids: Optional[List[str]] = None
    card_type: Optional[str] = None
    description: Optional[str] = None
    output_description: Optional[str] = None
    call_method: Optional[str] = None
    input_variables: Optional[List[VariableDefinition]] = None
    template_body: Optional[str] = None


class TemplateRecord(TemplateBase):
    id: str = Field(default_factory=generate_id)
    created_at: datetime = Field(default_factory=datetime.utcnow)
    updated_at: datetime = Field(default_factory=datetime.utcnow)


class TemplateRenderRequest(BaseModel):
    template_id: str
    parameters: dict


class TemplatePreviewRequest(BaseModel):
    template_body: str
    parameters: dict = Field(default_factory=dict)
    analyze_only: bool = Field(False, description="是否只分析变量，不渲染")
    common_body: Optional[str] = Field(None, description="关联的common模板正文（用于合并宏定义和列表变量）")


class TemplateRenderResponse(BaseModel):
    rendered_text: str


class MachineConfig(BaseModel):
    """机型硬件配置"""
    label: str = Field(..., description="显示名称，如 X11")
    type_ids: dict = Field(..., description="设备类型到type_id的映射，如 {'wash': 'xxx', 'dry': 'xxx'}")
    zone_ids: dict = Field(..., description="设备类型到zone_ids的映射，如 {'wash': ['2','3'], 'dry': ['0']}")
    card_type: str = Field("single_card", description="卡片类型：single_card/multi_card")


class MachineConfigCreate(BaseModel):
    model_key: str = Field(..., description="机型标识，如 x12")
    label: str = Field(..., description="显示名称")
    type_ids: dict = Field(..., description="设备类型到type_id的映射")
    zone_ids: dict = Field(..., description="设备类型到zone_ids的映射")
    card_type: str = Field("single_card", description="卡片类型")
    reuse_from: Optional[str] = Field(None, description="复用来源机型，如 x11")


class MachineConfigUpdate(BaseModel):
    label: Optional[str] = None
    type_ids: Optional[dict] = None
    zone_ids: Optional[dict] = None
    card_type: Optional[str] = None
    reuse_from: Optional[str] = None