from datetime import datetime, timedelta
from typing import Literal
from pydantic import BaseModel, EmailStr, Field, ValidationInfo, field_validator


ProductStatus = Literal["draft", "published", "archived"]
LeadStatus = Literal["new", "assigned", "contacted", "planning", "won", "invalid"]


class LoginIn(BaseModel):
    email: EmailStr
    password: str = Field(min_length=6)


class PhoneLoginIn(BaseModel):
    code: str = Field(min_length=1, max_length=256)


class ProductImageIn(BaseModel):
    url: str = ""
    alt: str | None = None
    sortOrder: int = 0


class TextBlock(BaseModel):
    type: Literal["text"]
    text: str = ""


class ImageBlock(BaseModel):
    type: Literal["image"]
    url: str = ""
    alt: str | None = None


class ProductDetailSectionIn(BaseModel):
    key: str = ""
    label: str = ""
    title: str | None = None
    blocks: list[TextBlock | ImageBlock] = Field(default_factory=list)


class ProductCreateIn(BaseModel):
    title: str = Field(min_length=2)
    subtitle: str | None = None
    destinationId: str | None = None
    priceAmount: int | None = Field(default=None, ge=0)
    priceUnit: str | None = None
    tags: list[str] = Field(default_factory=list)
    coverImage: str | None = None
    summary: str | None = None
    images: list[ProductImageIn] | None = None
    detailSections: list[ProductDetailSectionIn] | None = None
    status: ProductStatus = "draft"
    sortWeight: int = 0


class ProductUpdateIn(BaseModel):
    title: str | None = Field(default=None, min_length=2)
    subtitle: str | None = None
    destinationId: str | None = None
    priceAmount: int | None = Field(default=None, ge=0)
    priceUnit: str | None = None
    tags: list[str] | None = None
    coverImage: str | None = None
    summary: str | None = None
    images: list[ProductImageIn] | None = None
    detailSections: list[ProductDetailSectionIn] | None = None
    status: ProductStatus | None = None
    sortWeight: int | None = None


class LeadCreateIn(BaseModel):
    destination: str | None = None
    phone: str = Field(min_length=2, max_length=64)
    travelDate: datetime | None = None
    peopleCount: int | None = Field(default=None, gt=0)
    budgetMin: int | None = Field(default=None, ge=0)
    budgetMax: int | None = Field(default=None, ge=0)
    note: str | None = Field(default=None, max_length=1000)
    sourcePage: str | None = None
    sourceProductId: str | None = None

    @field_validator("phone")
    @classmethod
    def normalize_phone(cls, value: str) -> str:
        normalized = " ".join(value.strip().split())
        if not normalized:
            raise ValueError("联系方式不能为空")
        return normalized

    @field_validator("travelDate", mode="before")
    @classmethod
    def parse_date_only_travel_date(cls, value):
        if isinstance(value, str) and len(value) == 10:
            try:
                return datetime.strptime(value, "%Y-%m-%d")
            except ValueError:
                return value
        return value


class LeadStatusIn(BaseModel):
    status: LeadStatus


class ProductQuery(BaseModel):
    keyword: str | None = None
    destinationId: str | None = None
    status: ProductStatus = "published"
    take: int = Field(default=48, ge=1, le=100)


class AdminProductQuery(BaseModel):
    keyword: str | None = None
    status: ProductStatus | None = None
    take: int = Field(default=100, ge=1, le=200)


class LeadQuery(BaseModel):
    status: LeadStatus | None = None
    sourcePage: str | None = None
    keyword: str | None = None
    createdFrom: datetime | None = None
    createdTo: datetime | None = None
    take: int = Field(default=100, ge=1, le=200)

    @field_validator("createdFrom", "createdTo", mode="before")
    @classmethod
    def parse_date_only_range(cls, value, info: ValidationInfo):
        if isinstance(value, str) and len(value) == 10:
            try:
                parsed = datetime.strptime(value, "%Y-%m-%d")
                return parsed + timedelta(days=1) if info.field_name == "createdTo" else parsed
            except ValueError:
                return value
        return value


class SiteConfigPatchIn(BaseModel):
    title: str | None = None
    kicker: str | None = None
    subtitle: str | None = None
    name: str | None = None
    slug: str | None = None
    region: str | None = None
    label: str | None = None
    keyword: str | None = None
    spots: str | None = None
    alt: str | None = None
    image: str | None = None
    description: str | None = None
    coverImage: str | None = None
    priceAmount: int | None = Field(default=None, ge=0)
    priceUnit: str | None = None
    tags: list[str] | None = None
    steps: list[str] | None = None
    destinationLabel: str | None = None
    destinationPlaceholder: str | None = None
    phoneLabel: str | None = None
    phonePlaceholder: str | None = None
    noteLabel: str | None = None
    notePlaceholder: str | None = None
    submitLabel: str | None = None
    chips: list[str] | None = None
    productIds: list[str] | None = None
    status: str | None = None
    startsAt: datetime | None = None
    endsAt: datetime | None = None
    targetType: str | None = None
    targetValue: str | None = None
    isHot: bool | None = None
    isActive: bool | None = None
    sortOrder: int | None = None


class SiteConfigReorderIn(BaseModel):
    itemIds: list[str] = Field(default_factory=list)