#include "routes.h"
#include "../lxb_wrapper.h"
#include "../servehelper.h"
#include "../client.h"
#include "../models.h"

static inline std::string make_title(const Post& post);


void status_route(const httplib::Request& req, httplib::Response& res) {
    std::string server = req.matches.str(1);
    std::string id = req.matches.str(2);

    std::optional<Post> post;
    PostContext context;
    try {
        post = mastodon_client.get_post(server, id);
        if (post) {
            context = mastodon_client.get_post_context(server, id);
        }
    } catch (const std::exception& e) {
        res.status = 500;
        serve_error(req, res, "500: Internal server error", "Failed to fetch post information", e.what());
        return;
    }

    if (!post) {
        res.status = 404;
        serve_error(req, res, "404: Post not found");
        return;
    }

    if (post->reblog) {
        serve_redirect(req, res, get_origin(req) + '/' + server + "/@" + post->reblog->account.acct(false) + '/' + post->reblog->id, true);
        return;
    }

    Element body("body");
    body.nodes.reserve(context.ancestors.size() * 2 + 1 + context.descendants.size() * 2);

    for (const Post& i : context.ancestors) {
        body.nodes.push_back(serialize_post(req, server, i));
        body.nodes.push_back(Element("hr"));
    }
    body.nodes.push_back(serialize_post(req, server, *post, false, true));
    for (const Post& i : context.descendants) {
        body.nodes.push_back(Element("hr"));
        body.nodes.push_back(serialize_post(req, server, i));
    }

    serve(req, res, make_title(*post), std::move(body));
}


static inline std::string make_title(const Post& post) {
    LXB::HTML::Document document(post.content.str);
    size_t content_len;
    const char* content = reinterpret_cast<const char*>(lxb_dom_node_text_content(document.body(), &content_len));

    std::string title = post.account.display_name + " (@" + post.account.acct() + "): ";
    if (content_len) {
        title.append(content, content_len > 50 ? 50 : content_len);
        if (content_len > 50) {
            title += "…";
        }
    } else {
        title += "Post";
    }

    return title;
}