# models/schema/order_item_exception.py
"""
Pydantic schemas for order item exception management.

Handles unmatched products during marketplace order imports.
"""

from datetime import datetime

from pydantic import BaseModel, ConfigDict, Field


# ============================================================================
# Exception Response Schemas
# ============================================================================


class OrderItemExceptionResponse(BaseModel):
    """Schema for order item exception response."""

    model_config = ConfigDict(from_attributes=True)

    id: int
    order_item_id: int
    vendor_id: int
    vendor_name: str | None = None  # For cross-vendor views

    # Original data from marketplace
    original_gtin: str | None
    original_product_name: str | None
    original_sku: str | None

    # Exception classification
    exception_type: str  # product_not_found, gtin_mismatch, duplicate_gtin

    # Resolution status
    status: str  # pending, resolved, ignored

    # Resolution details
    resolved_product_id: int | None
    resolved_at: datetime | None
    resolved_by: int | None
    resolution_notes: str | None

    # Timestamps
    created_at: datetime
    updated_at: datetime

    # Nested order info (populated by service)
    order_number: str | None = None
    order_id: int | None = None
    order_date: datetime | None = None
    order_status: str | None = None

    @property
    def is_pending(self) -> bool:
        """Check if exception is pending resolution."""
        return self.status == "pending"

    @property
    def is_resolved(self) -> bool:
        """Check if exception has been resolved."""
        return self.status == "resolved"

    @property
    def is_ignored(self) -> bool:
        """Check if exception has been ignored."""
        return self.status == "ignored"


class OrderItemExceptionBriefResponse(BaseModel):
    """Brief exception info for embedding in order item responses."""

    model_config = ConfigDict(from_attributes=True)

    id: int
    original_gtin: str | None
    original_product_name: str | None
    exception_type: str
    status: str
    resolved_product_id: int | None


# ============================================================================
# List/Stats Response Schemas
# ============================================================================


class OrderItemExceptionListResponse(BaseModel):
    """Paginated list of exceptions."""

    exceptions: list[OrderItemExceptionResponse]
    total: int
    skip: int
    limit: int


class OrderItemExceptionStats(BaseModel):
    """Exception statistics for a vendor."""

    pending: int = 0
    resolved: int = 0
    ignored: int = 0
    total: int = 0

    # Additional breakdown
    orders_with_exceptions: int = 0


# ============================================================================
# Request Schemas
# ============================================================================


class ResolveExceptionRequest(BaseModel):
    """Request to resolve an exception by assigning a product."""

    product_id: int = Field(..., description="Product ID to assign to this order item")
    notes: str | None = Field(
        None,
        max_length=1000,
        description="Optional notes about the resolution"
    )


class IgnoreExceptionRequest(BaseModel):
    """Request to ignore an exception (still blocks confirmation)."""

    notes: str = Field(
        ...,
        min_length=1,
        max_length=1000,
        description="Reason for ignoring (required)"
    )


class BulkResolveRequest(BaseModel):
    """Request to bulk resolve all pending exceptions for a GTIN."""

    gtin: str = Field(
        ...,
        min_length=1,
        max_length=50,
        description="GTIN to match pending exceptions"
    )
    product_id: int = Field(..., description="Product ID to assign")
    notes: str | None = Field(
        None,
        max_length=1000,
        description="Optional notes about the resolution"
    )


class BulkResolveResponse(BaseModel):
    """Response from bulk resolve operation."""

    resolved_count: int
    gtin: str
    product_id: int


# ============================================================================
# Auto-Match Response Schemas
# ============================================================================


class AutoMatchResult(BaseModel):
    """Result of auto-matching after product import."""

    gtin: str
    product_id: int
    resolved_count: int
    resolved_exception_ids: list[int]