from uuid import UUID

from fastapi import APIRouter, Depends, Query
from sqlalchemy.orm import Session

from app.api.schemas import (
    BuyingProjectIn,
    BuyingProjectPatch,
    DiscoverySearchIn,
    ProjectCriteriaIn,
    page,
    parse_page,
)
from app.persistence.db import get_session
from app.services.catalog_service import CatalogService
from app.services.discovery_service import CandidateRankingService, DiscoverySearchService
from app.services.project_service import ProjectService

router = APIRouter(prefix="/api/v1")


@router.get("/product-categories")
def list_product_categories(session: Session = Depends(get_session)):
    return {"items": CatalogService(session).list_product_categories()}


@router.get("/product-categories/{product_category_id}/sources")
def list_category_sources(product_category_id: str, session: Session = Depends(get_session)):
    return {"items": CatalogService(session).sources_for_category(product_category_id)}


@router.get("/product-categories/{product_category_id}/available-criteria")
def available_criteria_for_category(
    product_category_id: str,
    source: str = Query(...),
    session: Session = Depends(get_session),
):
    return CatalogService(session).available_criteria(product_category_id, source)


@router.get("/buying-templates")
def list_buying_templates(session: Session = Depends(get_session)):
    return {"items": CatalogService(session).list_templates()}


@router.post("/buying-projects", status_code=201)
def create_buying_project(payload: BuyingProjectIn, session: Session = Depends(get_session)):
    return ProjectService(session).create(payload.model_dump())


@router.get("/buying-projects")
def list_buying_projects(limit: int = 50, offset: int = 0, session: Session = Depends(get_session)):
    limit, offset = parse_page(limit, offset)
    items, total = ProjectService(session).list(limit, offset)
    return page(items, limit, offset, total)


@router.get("/buying-projects/{project_id}")
def get_buying_project(project_id: UUID, session: Session = Depends(get_session)):
    return ProjectService(session).get(project_id)


@router.patch("/buying-projects/{project_id}")
def patch_buying_project(project_id: UUID, payload: BuyingProjectPatch, session: Session = Depends(get_session)):
    return ProjectService(session).patch(project_id, payload.model_dump(exclude_unset=True))


@router.post("/buying-projects/{project_id}/criteria", status_code=201)
def add_buying_project_criteria(
    project_id: UUID,
    payload: ProjectCriteriaIn,
    session: Session = Depends(get_session),
):
    return ProjectService(session).replace_criteria(project_id, payload.model_dump())


@router.put("/buying-projects/{project_id}/criteria")
def put_buying_project_criteria(
    project_id: UUID,
    payload: ProjectCriteriaIn,
    session: Session = Depends(get_session),
):
    return ProjectService(session).replace_criteria(project_id, payload.model_dump())


@router.get("/buying-projects/{project_id}/criteria")
def get_buying_project_criteria(project_id: UUID, session: Session = Depends(get_session)):
    return ProjectService(session).get_criteria(project_id)


@router.get("/buying-projects/{project_id}/available-criteria")
def available_criteria(project_id: UUID, session: Session = Depends(get_session)):
    return ProjectService(session).available_criteria(project_id)


@router.get("/buying-projects/{project_id}/discovery-searches")
def list_project_searches(project_id: UUID, session: Session = Depends(get_session)):
    return {"items": DiscoverySearchService(session).list_for_project(project_id)}


@router.post("/buying-projects/{project_id}/discovery-searches", status_code=201)
def create_project_search(project_id: UUID, payload: DiscoverySearchIn, session: Session = Depends(get_session)):
    body = payload.model_dump()
    body["buying_project_id"] = project_id
    return DiscoverySearchService(session).create(body)


@router.get("/buying-projects/{project_id}/candidates")
def list_candidates(project_id: UUID, session: Session = Depends(get_session)):
    return {"items": CandidateRankingService(session).list_candidates(project_id)}


@router.get("/buying-projects/{project_id}/candidates/{candidate_id}")
def get_candidate(project_id: UUID, candidate_id: UUID, session: Session = Depends(get_session)):
    return CandidateRankingService(session).get_candidate(project_id, candidate_id)


@router.get("/buying-projects/{project_id}/candidates/{candidate_id}/observations")
def list_candidate_observations(project_id: UUID, candidate_id: UUID, session: Session = Depends(get_session)):
    return {"items": CandidateRankingService(session).list_observations(project_id, candidate_id)}


@router.get("/buying-projects/{project_id}/shortlist")
def list_shortlist(project_id: UUID, session: Session = Depends(get_session)):
    return {"items": CandidateRankingService(session).list_candidates(project_id, shortlisted_only=True)}