from datetime import datetime

from pydantic import BaseModel, ConfigDict, Field, field_validator


class MarketplaceImportJobRequest(BaseModel):
    """Request schema for triggering marketplace import.

    Note: vendor_id is injected by middleware, not from request body.
    """

    source_url: str = Field(..., description="URL to CSV file from marketplace")
    marketplace: str = Field(default="Letzshop", description="Marketplace name")
    batch_size: int | None = Field(
        1000, description="Processing batch size", ge=100, le=10000
    )
    language: str = Field(
        default="en",
        description="Language code for product translations (e.g., 'en', 'fr', 'de')",
    )

    @field_validator("source_url")
    @classmethod
    def validate_url(cls, v):
        # Basic URL security validation
        if not v.startswith(("http://", "https://")):
            raise ValueError("URL must start with http:// or https://")
        return v.strip()

    @field_validator("marketplace")
    @classmethod
    def validate_marketplace(cls, v):
        return v.strip()

    @field_validator("language")
    @classmethod
    def validate_language(cls, v):
        # Basic language code validation (2-5 chars)
        v = v.strip().lower()
        if not 2 <= len(v) <= 5:
            raise ValueError("Language code must be 2-5 characters (e.g., 'en', 'fr')")
        return v


class AdminMarketplaceImportJobRequest(BaseModel):
    """Request schema for admin-triggered marketplace import.

    Includes vendor_id since admin can import for any vendor.
    """

    vendor_id: int = Field(..., description="Vendor ID to import products for")
    source_url: str = Field(..., description="URL to CSV file from marketplace")
    marketplace: str = Field(default="Letzshop", description="Marketplace name")
    batch_size: int | None = Field(
        1000, description="Processing batch size", ge=100, le=10000
    )
    language: str = Field(
        default="en",
        description="Language code for product translations (e.g., 'en', 'fr', 'de')",
    )

    @field_validator("source_url")
    @classmethod
    def validate_url(cls, v):
        # Basic URL security validation
        if not v.startswith(("http://", "https://")):
            raise ValueError("URL must start with http:// or https://")
        return v.strip()

    @field_validator("marketplace")
    @classmethod
    def validate_marketplace(cls, v):
        return v.strip()

    @field_validator("language")
    @classmethod
    def validate_language(cls, v):
        v = v.strip().lower()
        if not 2 <= len(v) <= 5:
            raise ValueError("Language code must be 2-5 characters (e.g., 'en', 'fr')")
        return v


class MarketplaceImportErrorResponse(BaseModel):
    """Response schema for individual import error."""

    model_config = ConfigDict(from_attributes=True)

    id: int
    row_number: int
    identifier: str | None = None
    error_type: str
    error_message: str
    row_data: dict | None = None
    created_at: datetime


class MarketplaceImportErrorListResponse(BaseModel):
    """Response schema for list of import errors."""

    errors: list[MarketplaceImportErrorResponse]
    total: int
    import_job_id: int


class MarketplaceImportJobResponse(BaseModel):
    """Response schema for marketplace import job."""

    model_config = ConfigDict(from_attributes=True)

    job_id: int
    vendor_id: int
    vendor_code: str | None = None  # Populated from vendor relationship
    vendor_name: str | None = None  # Populated from vendor relationship
    marketplace: str
    source_url: str
    status: str
    language: str | None = None  # Language used for translations

    # Counts
    imported: int = 0
    updated: int = 0
    total_processed: int = 0
    error_count: int = 0

    # Error details
    error_message: str | None = None

    # Timestamps
    created_at: datetime
    started_at: datetime | None = None
    completed_at: datetime | None = None


class MarketplaceImportJobListResponse(BaseModel):
    """Response schema for list of import jobs."""

    jobs: list[MarketplaceImportJobResponse]
    total: int
    skip: int
    limit: int


class AdminMarketplaceImportJobResponse(MarketplaceImportJobResponse):
    """Extended response schema for admin with additional fields."""

    id: int  # Alias for job_id (frontend compatibility)
    error_details: list = []  # Placeholder for future error details
    created_by_name: str | None = None  # Username of who created the job


class AdminMarketplaceImportJobListResponse(BaseModel):
    """Response schema for paginated list of import jobs (admin)."""

    items: list[AdminMarketplaceImportJobResponse]
    total: int
    page: int
    limit: int


class MarketplaceImportJobStatusUpdate(BaseModel):
    """Schema for updating import job status (internal use)."""

    status: str
    imported_count: int | None = None
    updated_count: int | None = None
    error_count: int | None = None
    total_processed: int | None = None
    error_message: str | None = None