"""
Endpoints API para gestión de clases SCAII y SCAF
"""

from fastapi import APIRouter, Depends, HTTPException, Query, status
from sqlalchemy.orm import Session
from typing import List, Optional

from core.database import get_core_db
from core.security import get_current_user, has_role
from .service import ClassService
from .dto import (
    ClassCreateDTO,
    ClassUpdateDTO,
    ClassResponseDTO,
    ClassBasicDTO,
    ClassListDTO,
    ClassSearchDTO,
)

router = APIRouter(prefix="/classes", tags=["Classes"])


@router.get("/", response_model=ClassListDTO)
async def list_classes(
    skip: int = Query(0, ge=0, description="Number of records to skip"),
    limit: int = Query(
        100, ge=1, le=1000, description="Maximum number of records to return"
    ),
    client_id: Optional[int] = Query(None, description="Filter by client key"),
    class_code: Optional[str] = Query(None, description="Search by class code"),
    description: Optional[str] = Query(None, description="Search in descriptions"),
    material_key: Optional[str] = Query(None, description="Filter by material key"),
    fraction: Optional[str] = Query(None, description="Filter by tariff fraction"),
    physical_review: Optional[int] = Query(
        None, description="Filter by physical review indicator"
    ),
    db: Session = Depends(get_core_db),
    current_user: dict = Depends(get_current_user),
):
    """
    List classes with optional filters and pagination
    """
    # Validate access to the tenant and company
    tenant_id = current_user.get("tenant_id")
    company_id = current_user.get("company_id")

    if not tenant_id or not company_id:
        raise HTTPException(status_code=403, detail="Access denied: Tenant or Company not found")

    service = ClassService(db)
    search_params = ClassSearchDTO(
        client_id=client_id,
        class_code=class_code,
        description=description,
        material_key=material_key,
        fraction=fraction,
        physical_review=physical_review,
    )
    return service.list_classes(skip, limit, search_params)


@router.get("/client/{client_id}", response_model=List[ClassBasicDTO])
async def get_classes_by_client(
    client_id: int,
    skip: int = Query(0, ge=0),
    limit: int = Query(100, ge=1, le=1000),
    db: Session = Depends(get_core_db),
    current_user: dict = Depends(get_current_user),
):
    """
    Get all classes for a specific client
    """
    # Validate access to the tenant and company
    tenant_id = current_user.get("tenant_id")
    company_id = current_user.get("company_id")

    if not tenant_id or not company_id:
        raise HTTPException(status_code=403, detail="Access denied: Tenant or Company not found")

    service = ClassService(db)
    return service.search_by_client(client_id, skip, limit)


@router.get("/search/fraction/{fraction}", response_model=List[ClassBasicDTO])
async def search_by_fraction(
    fraction: str,
    db: Session = Depends(get_core_db),
    current_user: dict = Depends(get_current_user),
):
    """
    Search classes by tariff fraction
    """
    service = ClassService(db)
    return service.search_by_fraction(fraction)


@router.get("/search/material/{material_key}", response_model=List[ClassBasicDTO])
async def search_by_material(
    material_key: str,
    db: Session = Depends(get_core_db),
    current_user: dict = Depends(get_current_user),
):
    """
    Search classes by material key
    """
    service = ClassService(db)
    return service.search_by_material(material_key)


@router.get(
    "/search/unit-measure/{unit_of_measure}", response_model=List[ClassBasicDTO]
)
async def get_classes_by_unit_measure(
    unit_of_measure: str,
    db: Session = Depends(get_core_db),
    current_user: dict = Depends(get_current_user),
):
    """
    Get classes by unit of measure
    """
    service = ClassService(db)
    return service.get_classes_by_unit_measure(unit_of_measure)


@router.get(
    "/search/physical-review/{physical_review}", response_model=List[ClassBasicDTO]
)
async def get_classes_by_physical_review(
    physical_review: int,
    db: Session = Depends(get_core_db),
    current_user: dict = Depends(get_current_user),
):
    """
    Get classes by physical review indicator
    """
    service = ClassService(db)
    return service.get_classes_by_physical_review(physical_review)


@router.get("/statistics", response_model=dict)
async def get_classes_statistics(
    db: Session = Depends(get_core_db), current_user: dict = Depends(get_current_user)
):
    """
    Get basic classes statistics
    """
    service = ClassService(db)
    return service.get_classes_statistics()


@router.get("/{client_id}/{class_code}", response_model=ClassResponseDTO)
async def get_class(
    client_id: int,
    class_code: str,
    db: Session = Depends(get_core_db),
    current_user: dict = Depends(get_current_user),
):
    """
    Get class by composite key (client_id + class_code)
    """
    service = ClassService(db)
    class_obj = service.get_class(client_id, class_code)
    if not class_obj:
        raise HTTPException(
            status_code=404,
            detail=f"Class with client_id '{client_id}' and class_code '{class_code}' not found",
        )
    return class_obj


@router.post("/", response_model=ClassResponseDTO, status_code=status.HTTP_201_CREATED)
async def create_class(
    class_data: ClassCreateDTO,
    db: Session = Depends(get_core_db),
    current_user: dict = Depends(get_current_user),
):
    """
    Create a new class in the system
    """
    service = ClassService(db)
    return service.create_class(class_data)


@router.put("/{client_id}/{class_code}", response_model=ClassResponseDTO)
async def update_class(
    client_id: int,
    class_code: str,
    class_data: ClassUpdateDTO,
    db: Session = Depends(get_core_db),
    current_user: dict = Depends(get_current_user),
):
    """
    Update class information
    """
    service = ClassService(db)
    class_obj = service.update_class(client_id, class_code, class_data)
    if not class_obj:
        raise HTTPException(
            status_code=404,
            detail=f"Class with client_id '{client_id}' and class_code '{class_code}' not found",
        )
    return class_obj


@router.delete("/{client_id}/{class_code}", status_code=status.HTTP_204_NO_CONTENT)
async def delete_class(
    client_id: int,
    class_code: str,
    db: Session = Depends(get_core_db),
    current_user: dict = Depends(get_current_user),
):
    """
    Delete class from the system

    Note: This will completely remove the class from the system.
    """
    service = ClassService(db)
    if not service.delete_class(client_id, class_code):
        raise HTTPException(
            status_code=404,
            detail=f"Class with client_id '{client_id}' and class_code '{class_code}' not found",
        )


# Endpoints específicos para información detallada
@router.get("/{client_id}/{class_code}/basic", response_model=ClassBasicDTO)
async def get_class_basic_info(
    client_id: int,
    class_code: str,
    db: Session = Depends(get_core_db),
    current_user: dict = Depends(get_current_user),
):
    """
    Get basic information for a class
    """
    service = ClassService(db)
    class_obj = service.get_class(client_id, class_code)
    if not class_obj:
        raise HTTPException(
            status_code=404,
            detail=f"Class with client_id '{client_id}' and class_code '{class_code}' not found",
        )

    return ClassBasicDTO(
        client_id=class_obj.client_id,
        class_code=class_obj.class_code,
        description_spanish=class_obj.description_spanish,
        description_english=class_obj.description_english,
        material_key=class_obj.material_key,
        fraction=class_obj.fraction,
    )


@router.get("/{client_id}/{class_code}/tariff", response_model=dict)
async def get_class_tariff_info(
    client_id: int,
    class_code: str,
    db: Session = Depends(get_core_db),
    current_user: dict = Depends(get_current_user),
):
    """
    Get tariff information for a class (fractions, IVA exempt, etc.)
    """
    service = ClassService(db)
    class_obj = service.get_class(client_id, class_code)
    if not class_obj:
        raise HTTPException(
            status_code=404,
            detail=f"Class with client_id '{client_id}' and class_code '{class_code}' not found",
        )

    return {
        "client_id": class_obj.client_id,
        "class_code": class_obj.class_code,
        "fraction": class_obj.fraction,
        "us_fraction": class_obj.us_fraction,
        "iva_exempt_fraction": class_obj.iva_exempt_fraction,
        "sub_key": class_obj.sub_key,
        "physical_review": class_obj.physical_review,
    }