# retoor <retoor@molodetz.nl>
import json
import re

from molodetz import config
from molodetz.assets import static_url
from molodetz.seo_meta_text import DEFAULT_DESCRIPTION

DEFAULT_OG_IMAGE_PATH = "/static/media/flyer-elite-twice.jpg"


def base_url(request):
    if config.SITE_URL:
        return config.SITE_URL
    return str(request.base_url).rstrip("/")


def _clean(text):
    return re.sub(r"[*_`#\[\]]", "", text or "").strip()


def website_schema(request):
    base = base_url(request)
    return {
        "@context": "https://schema.org",
        "@type": "WebSite",
        "name": config.APP_TITLE,
        "url": base + "/",
        "inLanguage": "en",
        "potentialAction": {
            "@type": "SearchAction",
            "target": base + "/docs/search?q={search_term_string}",
            "query-input": "required name=search_term_string",
        },
    }


def organization_schema(request):
    base = base_url(request)
    return {"@context": "https://schema.org", "@type": "Organization", "name": config.APP_TITLE, "url": base + "/"}


def breadcrumb_schema(request, breadcrumbs):
    base = base_url(request)
    return {
        "@context": "https://schema.org",
        "@type": "BreadcrumbList",
        "itemListElement": [
            {"@type": "ListItem", "position": index + 1, "name": _clean(name), "item": base + path}
            for index, (name, path) in enumerate(breadcrumbs)
        ],
    }


def article_schema(request, post, author):
    base = base_url(request)
    return {
        "@context": "https://schema.org",
        "@type": "BlogPosting",
        "headline": _clean(post["title"]),
        "datePublished": post.get("published_at") or post.get("created_at"),
        "dateModified": post.get("updated_at"),
        "inLanguage": "en",
        "mainEntityOfPage": f"{base}/posts/{post['slug']}",
        "author": {"@type": "Person", "name": author["username"] if author else "retoor", "url": f"{base}/people/{author['username'] if author else 'retoor'}"},
        "publisher": {"@type": "Organization", "name": config.APP_TITLE},
    }


def profile_schema(request, person):
    base = base_url(request)
    return {
        "@context": "https://schema.org",
        "@type": "ProfilePage",
        "mainEntity": {"@type": "Person", "name": person["username"], "url": f"{base}/people/{person['username']}"},
    }


def base_seo_context(
    request,
    title,
    description=None,
    robots="index,follow",
    og_type="website",
    og_image=None,
    breadcrumbs=None,
    schemas=None,
    prev_url=None,
    next_url=None,
    keywords=None,
):
    base = base_url(request)
    canonical = base + request.url.path
    page = request.query_params.get("page")
    if page:
        canonical += f"?page={page}"
    image = og_image or static_url(DEFAULT_OG_IMAGE_PATH)
    if image.startswith("/"):
        image = base + image
    crumbs = [(_clean(name), path) for name, path in (breadcrumbs or [])]
    all_schemas = list(schemas or [])
    if crumbs:
        all_schemas.append(breadcrumb_schema(request, crumbs))
    full_title = f"{title} | {config.APP_TITLE}" if title and title != config.APP_TITLE else config.APP_TITLE
    return {
        "title": full_title,
        "description": description or DEFAULT_DESCRIPTION,
        "robots": robots,
        "canonical": canonical,
        "og_type": og_type,
        "og_image": image,
        "breadcrumbs": crumbs,
        "json_ld": [json.dumps(schema, ensure_ascii=False).replace("</", "<\\/") for schema in all_schemas],
        "prev_url": prev_url,
        "next_url": next_url,
        "keywords": keywords or "molodetz, writing, craftsmanship, software, community",
    }