from urllib.parse import urljoin

from django.conf import settings as django_settings
from django.db import DatabaseError, connection
from django.http import JsonResponse
from django.views.decorators.http import require_GET
from wagtail.models import Site

from .models import GalleryItem, HomePage, LessonInfo, Show, SiteSettings, TeacherProfile


def serialize_image(request, image):
    if image is None:
        return None
    public_base_url = django_settings.WAGTAILADMIN_BASE_URL or request.build_absolute_uri("/")
    return {
        "url": urljoin(f"{public_base_url.rstrip('/')}/", image.file.url),
        "alt": image.title,
    }


def find_site(request):
    return Site.find_for_request(request) or Site.objects.filter(is_default_site=True).first()


@require_GET
def health(request):
    try:
        with connection.cursor() as cursor:
            cursor.execute("SELECT 1")
            cursor.fetchone()
    except DatabaseError:
        return JsonResponse({"status": "unavailable"}, status=503)
    return JsonResponse({"status": "ok"})


@require_GET
def home_api(request):
    site = find_site(request)
    settings = SiteSettings.for_site(site) if site else None
    homepage = (
        HomePage.objects.live().filter(id=site.root_page_id).first()
        if site
        else HomePage.objects.live().first()
    )
    teacher = TeacherProfile.objects.order_by("id").first()
    lesson = LessonInfo.objects.order_by("id").first()

    settings_data = None
    if settings:
        settings_data = {
            "laboratory_name": settings.laboratory_name,
            "short_claim": settings.short_claim,
            "email": settings.email,
            "phone": settings.phone,
            "whatsapp": settings.whatsapp,
            "instagram": settings.instagram,
            "facebook": settings.facebook,
            "address": settings.address,
            "footer_text": settings.footer_text,
        }

    homepage_data = None
    feature_cards = []
    if homepage:
        homepage_data = {
            "hero_title": homepage.hero_title,
            "hero_subtitle": homepage.hero_subtitle,
            "hero_image": serialize_image(request, homepage.hero_image),
            "intro_title": homepage.intro_title,
            "intro_body": str(homepage.intro_body),
            "cta_primary_label": homepage.cta_primary_label,
            "cta_primary_url": homepage.cta_primary_url,
            "cta_secondary_label": homepage.cta_secondary_label,
            "cta_secondary_url": homepage.cta_secondary_url,
            "laboratory_title": homepage.laboratory_title,
            "laboratory_body": str(homepage.laboratory_body),
            "laboratory_image": serialize_image(request, homepage.laboratory_image),
        }
        feature_cards = [
            {"title": card.title, "text": card.text, "order": card.sort_order}
            for card in homepage.feature_cards.all()
        ]

    teacher_data = None
    if teacher:
        teacher_data = {
            "name": teacher.name,
            "photo": serialize_image(request, teacher.photo),
            "short_bio": teacher.short_bio,
            "full_bio": str(teacher.full_bio),
            "quote": teacher.quote,
        }

    lesson_data = None
    if lesson:
        lesson_data = {
            "day_time": lesson.day_time,
            "location": lesson.location,
            "audience": lesson.audience,
            "description": str(lesson.description),
            "trial_lesson": lesson.trial_lesson,
            "notes": lesson.notes,
        }

    shows = [
        {
            "title": show.title,
            "year": show.year,
            "short_description": show.short_description,
            "description": str(show.description),
            "poster": serialize_image(request, show.poster),
            "location": show.location,
            "cast": show.cast,
            "order": show.order,
        }
        for show in Show.objects.filter(visible_on_home=True).select_related("poster")
    ]
    gallery_items = [
        {
            "image": serialize_image(request, item.image),
            "category": item.category,
            "caption": item.caption,
            "order": item.order,
        }
        for item in GalleryItem.objects.filter(visible_on_home=True).select_related("image")
    ]

    return JsonResponse(
        {
            "settings": settings_data,
            "homepage": homepage_data,
            "feature_cards": feature_cards,
            "teacher": teacher_data,
            "lesson_info": lesson_data,
            "shows": shows,
            "gallery_items": gallery_items,
        }
    )