from pydantic import BaseModel, ConfigDict, Field, model_validator
from typing import List, Literal, Optional, Any, Dict

CurrencyCode = Literal["USD", "EUR"]


class ProxyConfiguration(BaseModel):
    use_apify_proxy: bool = Field(True, serialization_alias="useApifyProxy")
    apify_proxy_groups: Optional[List[str]] = Field(
        default=["RESIDENTIAL"],
        serialization_alias="apifyProxyGroups",
    )


class TemuScrapeRequest(BaseModel):
    search_terms: List[str] = Field(
        default_factory=list,
        description="Keywords to search on Temu",
        serialization_alias="searchTerms",
    )
    product_urls: List[str] = Field(
        default_factory=list,
        description="Direct Temu product page URLs",
        serialization_alias="productUrls",
    )
    category: str = Field(
        default="",
        description="Category slug (e.g. electronics, women-clothing)",
    )
    max_price: int = Field(
        default=0,
        ge=0,
        description="Max price in USD; 0 means no filter",
        serialization_alias="maxPrice",
    )
    max_results: int = Field(
        default=50,
        ge=0,
        description="Max products to scrape; 0 for unlimited",
        serialization_alias="maxResults",
    )
    proxy_configuration: Optional[ProxyConfiguration] = Field(
        default=None,
        serialization_alias="proxyConfiguration",
    )

    @model_validator(mode="after")
    def require_scrape_target(self) -> "TemuScrapeRequest":
        if not self.search_terms and not self.product_urls and not self.category:
            raise ValueError(
                "Provide at least one of search_terms, product_urls, or category"
            )
        return self

    def to_actor_input(self) -> Dict[str, Any]:
        payload: Dict[str, Any] = {
            "searchTerms": self.search_terms,
            "productUrls": self.product_urls,
            "category": self.category,
            "maxPrice": self.max_price,
            "maxResults": self.max_results,
        }
        proxy = self.proxy_configuration or ProxyConfiguration()
        payload["proxyConfiguration"] = proxy.model_dump(
            by_alias=True, exclude_none=True
        )
        return payload


class AmitTemuScrapeRequest(BaseModel):
    """Input for amit123/temu-products-scraper."""

    search_queries: List[str] = Field(
        ...,
        min_length=1,
        description="Search keywords on Temu",
        serialization_alias="searchQueries",
    )
    currency: CurrencyCode = Field(
        default="USD",
        description="Price currency (USD or EUR)",
    )
    max_results: int = Field(
        default=40,
        ge=20,
        le=200,
        description="Max products per search query (20-200)",
        serialization_alias="maxResults",
    )

    def to_actor_input(self) -> Dict[str, Any]:
        return {
            "searchQueries": self.search_queries,
            "currency": self.currency,
            "maxResults": self.max_results,
        }


class TemuProductVariant(BaseModel):
    sku_id: Optional[str] = Field(None, alias="skuId")
    title: Optional[str] = None
    price: Optional[float] = None
    original_price: Optional[float] = Field(None, alias="originalPrice")
    image: Optional[str] = None
    available: Optional[bool] = None
    attributes: Optional[Dict[str, Any]] = None

    model_config = ConfigDict(populate_by_name=True, extra="allow")


class TemuProduct(BaseModel):
    title: Optional[str] = None
    price: Optional[float] = None
    original_price: Optional[float] = Field(None, alias="originalPrice")
    discount: Optional[str] = None
    sold: Optional[str] = None
    rating: Optional[float] = None
    reviews: Optional[int] = None
    category: Optional[str] = None
    images: List[str] = Field(default_factory=list)
    variants: List[Dict[str, Any]] = Field(default_factory=list)
    store: Optional[str] = None
    shipping_info: Optional[str] = Field(None, alias="shippingInfo")
    url: Optional[str] = None
    product_id: Optional[str] = Field(None, alias="productId")
    brand: Optional[str] = None
    currency: Optional[str] = None
    search_term: Optional[str] = Field(None, alias="searchTerm")
    scraped_at: Optional[str] = Field(None, alias="scrapedAt")

    model_config = ConfigDict(populate_by_name=True, extra="allow")


class SavedProduct(BaseModel):
    id: int
    run_id: int
    scraper: str
    saved_at: str
    title: Optional[str] = None
    url: Optional[str] = None
    product_id: Optional[str] = None
    search_term: Optional[str] = None
    product: Dict[str, Any] = Field(default_factory=dict)
    rank: Optional[float] = None

    model_config = ConfigDict(extra="allow")


class TemuScrapeResponse(BaseModel):
    scraper: str = "sovereigntaylor"
    actor_id: Optional[str] = None
    saved_run_id: Optional[int] = None
    saved_at: Optional[str] = None
    search_terms: List[str] = Field(default_factory=list)
    search_queries: List[str] = Field(default_factory=list)
    product_urls: List[str] = Field(default_factory=list)
    category: str = ""
    currency: Optional[str] = None
    max_results: int = 0
    product_count: int = 0
    run_id: Optional[str] = None
    dataset_id: Optional[str] = None
    dataset_url: Optional[str] = None
    products: List[TemuProduct] = Field(default_factory=list)


class TemuSearchResponse(BaseModel):
    query: str
    scraper: str
    match_count: int = 0
    total_saved_for_scraper: int = 0
    run_id: Optional[int] = None
    since: Optional[str] = None
    results: List[SavedProduct] = Field(default_factory=list)