use dioxus::prelude::*;
use tavern::{Adventurer, Legend, Lore, Tale};

use crate::page::Page;
use crate::server::*;



const AUTHOR_CSS: Asset = asset!("/assets/css/blog_author.css");
const LIST_CSS: Asset = asset!("/assets/css/blog_list.css");
const NAV_CSS: Asset = asset!("/assets/css/blog_nav.css");
const POST_CSS: Asset = asset!("/assets/css/blog_post.css");
const TAG_CSS: Asset = asset!("/assets/css/blog_tag.css");



fn convert_tag<S>(text: S) -> (String, String)
   where S: AsRef<str>
{
   if let Some((first, second)) = text.as_ref().split_once('-')
   {
      (first.to_owned(), second.to_owned())
   }
   else
   {
      (text.as_ref().to_owned(), "none".to_owned())
   }
}

fn strip_tag(text: &str) -> &str
{
   if let Some((first, _)) = text.split_once('-')
   {
      first
   }
   else
   {
      text
   }
}



#[component]
pub fn TagItem(tag: String, style: String) -> Element
{
   rsx! {
      li
      {
         class: "tag_item",
         Link
            {
               class: "{style}",
               to: Page::Blog { tag: tag.clone() },
               span { "{tag}" }
            }
//         a { class: "{style}", "{tag}" }
      }
   }
}

#[component]
pub fn TagList(children: Element) -> Element
{
   rsx! {
      document::Link { rel: "stylesheet", href: TAG_CSS }

      h5
      {
         class: "blog_tag_style",
         ul
         {
            class: "tag_list",
            {children}
         }
      }
   }
}


#[component]
pub fn BlogAuthor() -> Element
{
   rsx! {
      document::Link { rel: "stylesheet", href: AUTHOR_CSS }

      section
      {
         class: "blog_author_style",

      }
   }
}


#[component]
pub fn BlogItem(title: String, slug: String, author: String, summary: String,
                tags: Vec<String>)
                -> Element
{
   let tags: Vec<(String, String)> =
      tags.iter().map(|t| convert_tag(t)).collect();

   rsx! {
      li
      {
         class: "blog_item",
         Link
         {
            to: Page::Post { slug: slug },
            h1 { "{title}" }
         }
         TagList
         {
            for (tag, style) in tags
            {
               TagItem
               {
                  tag: tag.clone(),
                  style: style.clone()
               }
            }
         }
         h4 { "Author: {author}" }
         p { "{summary}" }
      }
   }
}


#[component]
pub fn BlogList(tags: Vec<String>, children: Element) -> Element
{
   let summaries = use_server_future(move || {
      let categories = tags.clone();
      async move { get_blog_list(categories).await }
   })?;

   rsx! {
      document::Link { rel: "stylesheet", href: LIST_CSS }

      section
      {
         class: "blog_list_style",
         ul
         {
            class: "blog_list",

      match &*summaries.read()
      {
         Some(Ok(lores)) =>
         {
            rsx!
            {
               for lore in lores
               {
                  BlogItem
                  {
                     title: lore.title.clone(),
                     slug: lore.slug.clone(),
                     author: lore.author.clone(),
                     summary: lore.summary.clone(),
                     tags: lore.tags.clone()
                  }
               }
            }
         }

         Some(Err(e)) =>
         {
            rsx!
            {
               p { "Unable to show post header." }
               p { "{e}" }
            }
         }

         None =>
         {
            rsx!
            {
               p { "Loading..." }
            }
         }
      }

            {children}
         }
      }
   }
}

#[component]
pub fn BlogNav() -> Element
{
   let tags = use_server_future(move || async move { get_tags().await })?;

   rsx! {
      document::Link { rel: "stylesheet", href: NAV_CSS }

      section
      {
         class: "blog_nav_style",
         div
         {
            class: "tag_style",
            h3 { "Categories" }
            ul
            {
               class: "tag_list",
               match &*tags.read()
         {
            Some(Ok(categories)) =>
            {
               rsx!
               {
                  for tag in categories
                  {
               li
               {
                  class: "tag_item",
                  a { href: "/blog/{strip_tag(tag)}", "{strip_tag(tag)}" }
               }
                  }
               }
            }

            Some(Err(e)) =>
            {
               rsx!
               {
                  p { "Unable to show desired post." }
                  p { "{e}" }
               }
            }

            None =>
            {
               rsx!
               {
                  p { "Loading..." }
               }
            }
         }
            }
      }
      }
   }
}


#[component]
pub fn PostHeaderAuthor(name: String, handle: String, profile_link: String)
                        -> Element
{
   rsx! {
      h4 { "Author: ", a { href: "{profile_link}", "{name} @{handle}" } }
   }
}

#[component]
pub fn PostHeader(title: String, author: String, tags: Vec<String>) -> Element
{
   let author = use_server_future(move || {
      let target_author = author.clone();
      async move { get_author(target_author).await }
   })?;


   let converted_tags: Vec<(String, String)> =
      tags.iter().map(|t| convert_tag(t)).collect();

   rsx! {
      h1 { "{title}" }
      TagList
      {
         for (tag, style) in converted_tags
         {
            TagItem
            {
               tag: tag.clone(),
               style: style.clone()
            }
         }
      }

      match &*author.read()
      {
         Some(Ok(author)) =>
         {
            rsx!
            {
               PostHeaderAuthor
               {
                  name: author.name.clone(),
                  handle: author.handle.clone(),
                  profile_link: author.legend.profile.clone()
               }
            }
         }

         Some(Err(e)) =>
         {
            rsx!
            {
               p { "Unable to show post header." }
               p { "{e}" }
            }
         }

         None =>
         {
            rsx!
            {
               p { "Loading..." }
            }
         }
      }
   }
}

#[component]
pub fn BlogPost(slug: String, children: Element) -> Element
{
   let post = use_server_future(move || {
      let url_slug = slug.clone();
      async move { get_blog_post(url_slug).await }
   })?;

   rsx! {
      document::Link { rel: "stylesheet", href: POST_CSS }

      article
      {
         class: "blog_post_style",

         match &*post.read()
         {
            Some(Ok(post)) =>
            {
               rsx!
               {
                  PostHeader
                  {
                     title: post.lore.title.clone(),
                     author: post.lore.author.clone(),
                     tags: post.lore.tags.clone()
                  }

                  div { dangerous_inner_html: "{post.story}" }
               }
            }

            Some(Err(e)) =>
            {
               rsx!
               {
                  p { "Unable to show desired post." }
                  p { "{e}" }
               }
            }

            None =>
            {
               rsx!
               {
                  p { "Loading..." }
               }
            }
         }

         {children}
      }
   }
}