from datetime import datetime, time
from fastapi import APIRouter, Depends, HTTPException, Query, status
from sqlalchemy import func, select
from sqlalchemy.orm import Session, selectinload
from .shared import site_config
from ..auth import create_customer_token, optional_customer, require_customer
from ..api_response import success_response
from ..database import get_db
from ..models import ConciergeAdvisor, Customer, CustomerBrowseHistory, DetailRecord, HomeTeamBuilding, HomeWanfaRecommendation, HomeWildArchive, Lead, WanfaCategory, WanfaRoute, utc_now
from ..schemas import BrowseHistoryCreateIn, LeadCreateIn, PhoneLoginIn
from ..media_urls import resolve_media_url
from ..serializers import (
    public_concierge_advisor_dict,
    public_home_team_building_dict,
    public_home_team_building_detail_dict,
    public_home_wanfa_recommendation_dict,
    public_home_wild_archive_detail_dict,
    public_home_wild_archive_dict,
    public_detail_dict,
    public_wanfa_category_dict,
)
from ..wechat import WechatApiError, WechatConfigError, exchange_phone_code


router = APIRouter()


def mask_phone(phone: str) -> str:
    normalized = phone.strip()
    if len(normalized) <= 7:
        return "***"
    return f"{normalized[:3]}****{normalized[-4:]}"


def public_customer_dict(customer: Customer) -> dict:
    return {"id": customer.id, "phoneMasked": mask_phone(customer.phone)}


def public_vehicle_demand_dict(lead: Lead) -> dict:
    return {
        "id": lead.id,
        "status": lead.status,
        "contactName": lead.contactName,
        "phoneMasked": mask_phone(lead.phone),
        "destination": lead.destination,
        "travelDate": lead.travelDate.isoformat() if lead.travelDate else None,
        "peopleCount": lead.peopleCount,
        "note": lead.note,
        "vehicleDemand": lead.vehicleDemand or {},
        "createdAt": lead.createdAt.isoformat(),
        "updatedAt": lead.updatedAt.isoformat(),
    }


def public_browse_history_dict(item: CustomerBrowseHistory) -> dict:
    return {
        "id": item.id,
        "itemType": item.itemType,
        "itemId": item.itemId,
        "title": item.title,
        "image": resolve_media_url(item.image) or "",
        "visitedAt": item.visitedAt.isoformat(),
    }


def browse_source(item_type: str, item_id: str, db: Session):
    models = {
        "wanfa-route": WanfaRoute,
        "team-building": HomeTeamBuilding,
        "wild-archive": HomeWildArchive,
    }
    model = models.get(item_type)
    if model is None:
        raise HTTPException(status_code=status.HTTP_422_UNPROCESSABLE_ENTITY, detail="浏览内容类型不支持")

    conditions = [model.id == item_id]
    if hasattr(model, "isActive"):
        conditions.append(model.isActive.is_(True))
    source = db.scalar(select(model).where(*conditions))
    if not source:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="浏览内容不存在")
    return source


@router.get("/health")
def health():
    return success_response({"ok": True, "service": "miniapp-api"})


@router.get("/api/public/site-config")
def get_site_config(db: Session = Depends(get_db)):
    return success_response(site_config(db, active_only=True))


@router.get("/api/public/wanfa/categories")
def get_public_wanfa_categories(db: Session = Depends(get_db)):
    categories = db.scalars(
        select(WanfaCategory)
        .options(selectinload(WanfaCategory.routes))
        .order_by(WanfaCategory.sortOrder.asc())
    ).all()
    return success_response({"categories": [public_wanfa_category_dict(category) for category in categories]})


@router.get("/api/public/details/{detail_key}")
def get_public_detail(detail_key: str, db: Session = Depends(get_db)):
    detail = db.scalar(
        select(DetailRecord).where(
            DetailRecord.key == detail_key,
            DetailRecord.isActive.is_(True),
        )
    )
    if not detail:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="详情不存在")
    advisor = None
    if detail.conciergeAdvisorId:
        candidate = db.get(ConciergeAdvisor, detail.conciergeAdvisorId)
        if candidate and candidate.isActive:
            advisor = candidate
    return success_response(public_detail_dict(detail, advisor))


@router.get("/api/public/concierge/advisors")
def get_public_concierge_advisors(db: Session = Depends(get_db)):
    advisors = db.scalars(
        select(ConciergeAdvisor)
        .where(ConciergeAdvisor.isActive.is_(True))
        .order_by(ConciergeAdvisor.sortOrder.asc())
    ).all()
    return success_response({"advisors": [public_concierge_advisor_dict(advisor) for advisor in advisors]})


@router.get("/api/public/home")
def get_public_home(db: Session = Depends(get_db)):
    team_buildings = db.scalars(
        select(HomeTeamBuilding)
        .where(HomeTeamBuilding.isActive.is_(True))
        .order_by(HomeTeamBuilding.sortOrder.asc())
    ).all()
    wild_archives = db.scalars(
        select(HomeWildArchive)
        .where(HomeWildArchive.isActive.is_(True))
        .order_by(HomeWildArchive.sortOrder.asc())
    ).all()
    play_recommendations = db.scalars(
        select(HomeWanfaRecommendation)
        .options(selectinload(HomeWanfaRecommendation.category).selectinload(WanfaCategory.routes))
        .where(HomeWanfaRecommendation.isActive.is_(True))
        .order_by(HomeWanfaRecommendation.sortOrder.asc())
    ).all()
    return success_response(
        {
            "experiences": [public_home_wanfa_recommendation_dict(item) for item in play_recommendations],
            "teamBuildings": [public_home_team_building_dict(item) for item in team_buildings],
            "wildArchives": [public_home_wild_archive_dict(item) for item in wild_archives],
        }
    )


@router.get("/api/public/home/team-buildings/{team_building_id}")
def get_public_team_building(team_building_id: str, db: Session = Depends(get_db)):
    team_building = db.scalar(
        select(HomeTeamBuilding).where(
            HomeTeamBuilding.id == team_building_id,
            HomeTeamBuilding.isActive.is_(True),
        )
    )
    if not team_building:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="团队共创不存在")
    return success_response(public_home_team_building_detail_dict(team_building))


@router.get("/api/public/home/wild-archives")
def list_public_wild_archives(db: Session = Depends(get_db)):
    archives = db.scalars(
        select(HomeWildArchive)
        .where(HomeWildArchive.isActive.is_(True))
        .order_by(HomeWildArchive.sortOrder.asc())
    ).all()
    return success_response({"items": [public_home_wild_archive_dict(item) for item in archives]})


@router.get("/api/public/home/wild-archives/{archive_id}")
def get_public_wild_archive(archive_id: str, db: Session = Depends(get_db)):
    archive = db.scalar(
        select(HomeWildArchive).where(
            HomeWildArchive.id == archive_id,
            HomeWildArchive.isActive.is_(True),
        )
    )
    if not archive:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="客片案例不存在")
    return success_response(public_home_wild_archive_detail_dict(archive))


@router.post("/api/public/auth/phone-login")
def phone_login(body: PhoneLoginIn, db: Session = Depends(get_db)):
    try:
        phone = exchange_phone_code(body.code)
    except WechatConfigError as exc:
        raise HTTPException(status_code=status.HTTP_503_SERVICE_UNAVAILABLE, detail=str(exc)) from exc
    except WechatApiError as exc:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(exc)) from exc

    customer = db.scalar(select(Customer).where(Customer.phone == phone))
    if not customer:
        customer = Customer(phone=phone)
        db.add(customer)
        db.flush()
    db.commit()
    db.refresh(customer)
    return success_response({"token": create_customer_token(customer), "customer": public_customer_dict(customer)})


@router.get("/api/public/auth/me")
def current_customer(customer: Customer = Depends(require_customer)):
    return success_response(public_customer_dict(customer))


@router.get("/api/public/customer/vehicle-demands")
def list_customer_vehicle_demands(
    pageNum: int = Query(default=1, ge=1),
    pageSize: int = Query(default=20, ge=1, le=50),
    customer: Customer = Depends(require_customer),
    db: Session = Depends(get_db),
):
    filters = [Lead.customerId == customer.id, Lead.leadType == "vehicle"]
    leads = db.scalars(
        select(Lead)
        .where(*filters)
        .order_by(Lead.createdAt.desc())
        .offset((pageNum - 1) * pageSize)
        .limit(pageSize)
    ).all()
    total = db.scalar(select(func.count()).select_from(Lead).where(*filters)) or 0
    return success_response(
        {
            "items": [public_vehicle_demand_dict(lead) for lead in leads],
            "total": total,
            "pageNum": pageNum,
            "pageSize": pageSize,
        }
    )


@router.get("/api/public/customer/vehicle-demands/{lead_id}")
def get_customer_vehicle_demand(
    lead_id: str,
    customer: Customer = Depends(require_customer),
    db: Session = Depends(get_db),
):
    lead = db.scalar(
        select(Lead).where(
            Lead.id == lead_id,
            Lead.customerId == customer.id,
            Lead.leadType == "vehicle",
        )
    )
    if not lead:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="用车记录不存在")
    return success_response(public_vehicle_demand_dict(lead))


@router.get("/api/public/customer/browse-history")
def list_customer_browse_history(
    pageNum: int = Query(default=1, ge=1),
    pageSize: int = Query(default=20, ge=1, le=50),
    customer: Customer = Depends(require_customer),
    db: Session = Depends(get_db),
):
    filters = [CustomerBrowseHistory.customerId == customer.id]
    items = db.scalars(
        select(CustomerBrowseHistory)
        .where(*filters)
        .order_by(CustomerBrowseHistory.visitedAt.desc())
        .offset((pageNum - 1) * pageSize)
        .limit(pageSize)
    ).all()
    total = db.scalar(select(func.count()).select_from(CustomerBrowseHistory).where(*filters)) or 0
    return success_response(
        {
            "items": [public_browse_history_dict(item) for item in items],
            "total": total,
            "pageNum": pageNum,
            "pageSize": pageSize,
        }
    )


@router.post("/api/public/customer/browse-history", status_code=status.HTTP_201_CREATED)
def save_customer_browse_history(
    body: BrowseHistoryCreateIn,
    customer: Customer = Depends(require_customer),
    db: Session = Depends(get_db),
):
    source = browse_source(body.itemType, body.itemId, db)
    item = db.scalar(
        select(CustomerBrowseHistory).where(
            CustomerBrowseHistory.customerId == customer.id,
            CustomerBrowseHistory.itemType == body.itemType,
            CustomerBrowseHistory.itemId == body.itemId,
        )
    )
    now = utc_now()
    if item:
        item.title = source.title
        item.image = source.image or ""
        item.visitedAt = now
        item.updatedAt = now
    else:
        item = CustomerBrowseHistory(
            customerId=customer.id,
            itemType=body.itemType,
            itemId=body.itemId,
            title=source.title,
            image=source.image or "",
            visitedAt=now,
            createdAt=now,
            updatedAt=now,
        )
        db.add(item)
    db.commit()
    db.refresh(item)
    return success_response(public_browse_history_dict(item), status_code=status.HTTP_201_CREATED)


@router.post("/api/public/leads", status_code=status.HTTP_201_CREATED)
def create_lead(
    body: LeadCreateIn,
    customer: Customer | None = Depends(optional_customer),
    db: Session = Depends(get_db),
):
    if body.leadType == "vehicle" and customer is None:
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="用车需求提交前请先登录")

    payload = body.model_dump(exclude_none=True, exclude={"vehicleDemand"})
    if body.leadType == "vehicle" and body.vehicleDemand:
        demand = body.vehicleDemand
        payload.update(
            {
                "customerId": customer.id if customer else None,
                "destination": demand.dropoffLocation,
                "travelDate": datetime.combine(demand.travelDate, time.min),
                "peopleCount": demand.peopleCount,
                "vehicleDemand": demand.model_dump(mode="json"),
            }
        )
    lead = Lead(**payload, status="new")
    db.add(lead)
    db.commit()
    db.refresh(lead)
    return success_response({"id": lead.id, "status": lead.status}, status_code=status.HTTP_201_CREATED)