from __future__ import annotations

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

from app.api.deps import get_current_user, get_db
from app.models.booking import Booking
from app.models.data_quality import DataQualityIssue
from app.models.vehicle import Vehicle
from app.schemas import CurrentUser, SearchResponse, SearchResultItem

router = APIRouter(prefix="/api/v1/search", tags=["search"])

# Static application sections. `id` is a stable code matching navigation.json's
# `items.*` keys -- the frontend localizes both the section label and its one-line
# detail from `id`, so no English prose is sent over the wire (search.sections.<id> in
# every locale; see docs/fleet-ops-correction/i18n-inventory.md). Manager-only sections
# are filtered by role, mirroring the same nav visibility rule Layout.tsx applies --
# search must never surface a destination the current role can't actually reach.
_SECTIONS: list[dict] = [
    {
        "id": "overview",
        "link": "/dashboard",
        # Search terms deliberately span all three supported UI languages (not just
        # English) so a query never depends on the operator's selected locale.
        "terms": ["overview", "dashboard", "readiness", "overzicht", "aperçu", "tableau de bord"],
    },
    {
        "id": "fleet",
        "link": "/vehicles",
        "terms": ["fleet", "vehicle", "vehicles", "wagenpark", "voertuig", "flotte", "véhicule"],
    },
    {
        "id": "bookings",
        "link": "/bookings",
        "terms": [
            "booking",
            "bookings",
            "rental",
            "boeking",
            "boekingen",
            "verhuur",
            "réservation",
            "réservations",
            "location",
        ],
    },
    {
        "id": "quality",
        "link": "/data-quality",
        "terms": [
            "quality",
            "data quality",
            "issues",
            "kwaliteit",
            "datakwaliteit",
            "problemen",
            "qualité",
            "problèmes",
        ],
        "role": "operations_manager",
    },
    {
        "id": "knowledge",
        "link": "/knowledge",
        "terms": ["knowledge", "procedures", "kennis", "procedures", "connaissances", "procédures"],
    },
    {
        "id": "integrations",
        "link": "/automation",
        "terms": [
            "automation",
            "integrations",
            "systems",
            "n8n",
            "automatisering",
            "integraties",
            "systemen",
            "automatisation",
            "intégrations",
            "systèmes",
        ],
        "role": "operations_manager",
    },
    {
        "id": "audit",
        "link": "/audit",
        "terms": ["audit", "history", "geschiedenis", "historique"],
        "role": "operations_manager",
    },
    {
        "id": "privacy",
        "link": "/privacy",
        "terms": ["privacy", "retention", "anonymise", "anonimiseren", "confidentialité"],
        "role": "operations_manager",
    },
]


@router.get("", response_model=SearchResponse)
def search(
    q: str = Query(min_length=1, max_length=100),
    db: Session = Depends(get_db),
    user: CurrentUser = Depends(get_current_user),
) -> SearchResponse:
    query = q.strip()
    normalized = query.lower()
    results: list[SearchResultItem] = []

    for section in _SECTIONS:
        role = section.get("role")
        if role and user.role != role:
            continue
        terms: list[str] = section["terms"]
        if any(term in normalized or normalized in term for term in terms):
            results.append(
                SearchResultItem(
                    type="section",
                    label=section["id"],
                    detail_code=section["id"],
                    link=section["link"],
                )
            )

    like = f"%{query}%"
    for v in db.scalars(
        select(Vehicle)
        .where(
            or_(
                Vehicle.public_ref.ilike(like),
                Vehicle.make.ilike(like),
                Vehicle.model.ilike(like),
                Vehicle.registration_number.ilike(like),
                Vehicle.location.ilike(like),
            )
        )
        .order_by(Vehicle.public_ref)
        .limit(5)
    ).all():
        results.append(
            SearchResultItem(
                type="vehicle",
                label=v.public_ref,
                detail_code="vehicleSummary",
                detail_params={"make": v.make, "model": v.model, "location": v.location},
                link=f"/vehicles/{v.public_ref}",
            )
        )

    for b in db.scalars(
        select(Booking)
        .where(Booking.public_ref.ilike(like))
        .order_by(Booking.starts_at.desc())
        .limit(5)
    ).all():
        results.append(
            SearchResultItem(
                type="booking",
                label=b.public_ref,
                detail_code=b.status,
                link=f"/bookings/{b.public_ref}",
            )
        )

    # No customer detail route exists in this proof of concept, so customers are
    # deliberately never returned here -- there is nowhere useful to send the user.
    if user.role == "operations_manager":
        for i in db.scalars(
            select(DataQualityIssue)
            .where(DataQualityIssue.public_ref.ilike(like))
            .order_by(DataQualityIssue.detected_at.desc())
            .limit(5)
        ).all():
            results.append(
                SearchResultItem(
                    type="data_quality_issue",
                    label=i.public_ref,
                    detail_code=i.rule_type,
                    link=f"/data-quality/{i.public_ref}",
                )
            )

    return SearchResponse(query=query, results=results[:10])