use crate::util::parse_abbreviated_number;
use crate::DbPool;
use crate::providers::Provider;
use crate::util::cache::VideoCache;
use crate::util::time::parse_time_to_seconds;
use crate::videos::{ServerOptions, VideoItem};
use error_chain::error_chain;
use htmlentity::entity::{ICodedDataTrait, decode};
use std::vec;
use std::time::{SystemTime, UNIX_EPOCH};
use async_trait::async_trait;

error_chain! {
    foreign_links {
        Io(std::io::Error);
        HttpRequest(wreq::Error);
    }
}

#[derive(Debug, Clone)]
pub struct Rule34videoProvider {
    url: String,
}
impl Rule34videoProvider {
    pub fn new() -> Self {
        Rule34videoProvider {
            url: "https://rule34video.com".to_string(),
        }
    }
    async fn get(
        &self,
        cache: VideoCache,
        page: u8,
        sort: &str,
        options: ServerOptions
    ) -> Result<Vec<VideoItem>> {
        let now = SystemTime::now()
            .duration_since(UNIX_EPOCH)
            .expect("Time went backwards");

        let timestamp_millis = now.as_millis(); // u128
        let expected_sorts = vec!["post_date", "video_viewed", "rating", "duration", "pseudo_random"];
        let sort = if expected_sorts.contains(&sort) {
            sort
        } else {
            "post_date"
        };

        let index = format!("rule34video:{}:{}", page, sort);

        let url = format!("{}/?mode=async&function=get_block&block_id=custom_list_videos_most_recent_videos&tag_ids=&sort_by={}&from={}&_={}", self.url, sort, page, timestamp_millis);
        
        let mut old_items: Vec<VideoItem> = vec![];
        if !(sort == "pseudo_random") {
            old_items = match cache.get(&index) {
                Some((time, items)) => {
                    if time.elapsed().unwrap_or_default().as_secs() < 60 * 5 {
                        println!("Cache hit for URL: {}", url);
                        return Ok(items.clone());
                    } else {
                        items.clone()
                    }
                }
                None => {
                    vec![]
                }
            };
        }
        let mut requester = options.requester.clone().unwrap();
        let text = requester.get(&url).await.unwrap();
        let video_items: Vec<VideoItem> = self.get_video_items_from_html(text.clone());
        if !video_items.is_empty() {
            cache.remove(&url);
            cache.insert(url.clone(), video_items.clone());
        } else {
            return Ok(old_items);
        }
        Ok(video_items)
    }
    async fn query(
        &self,
        cache: VideoCache,
        page: u8,
        query: &str,
        sort: &str,
        options: ServerOptions
    ) -> Result<Vec<VideoItem>> {
        let now = SystemTime::now()
            .duration_since(UNIX_EPOCH)
            .expect("Time went backwards");
        let timestamp_millis = now.as_millis(); // u128
        let expected_sorts = vec!["post_date", "video_viewed", "rating", "duration", "pseudo_random"];
        let sort = if expected_sorts.contains(&sort) {
            sort
        } else {
            "post_date"
        };

        let index = format!("rule34video:{}:{}:{}", page, sort, query);

        let url = format!("{}/search/{}/?mode=async&function=get_block&block_id=custom_list_videos_videos_list_search&tag_ids=&sort_by={}&from_videos={}&from_albums={}&_={}", self.url, query.replace(" ","-"), sort, page, page, timestamp_millis);

        // Check our Video Cache. If the result is younger than 1 hour, we return it.
        let old_items = match cache.get(&index) {
            Some((time, items)) => {
                if time.elapsed().unwrap_or_default().as_secs() < 60 * 5 {
                    return Ok(items.clone());
                } else {
                    let _ = cache.check().await;
                    return Ok(items.clone());
                }
            }
            None => {
                vec![]
            }
        };
        let mut requester = options.requester.clone().unwrap();
        let text = requester.get(&url).await.unwrap();
            let video_items: Vec<VideoItem> = self.get_video_items_from_html(text.clone());
            if !video_items.is_empty() {
                cache.remove(&url);
                cache.insert(url.clone(), video_items.clone());
            } else {
                return Ok(old_items);
            }
            Ok(video_items)
    }

    fn get_video_items_from_html(&self, html: String) -> Vec<VideoItem> {
        if html.is_empty() {
            println!("HTML is empty");
            return vec![];
        }
        let mut items: Vec<VideoItem> = Vec::new();
        let video_listing_content = html.split("<div class=\"thumbs clearfix\" id=\"custom_list_videos").collect::<Vec<&str>>()[1].split("<div class=\"pagination\"").collect::<Vec<&str>>()[0].to_string();
        let raw_videos = video_listing_content
            .split("<div class=\"item thumb video_")
            .collect::<Vec<&str>>()[1..]
            .to_vec();
        for video_segment in &raw_videos {
            // let vid = video_segment.split("\n").collect::<Vec<&str>>()[1]
            // for (index, line) in vid.iter().enumerate() {
            //     println!("Line {}: {}", index, line);
            // }

            if video_segment.contains("https://rule34video.com/images/advertisements"){
                continue;
            }

            let mut title = video_segment.split("<div class=\"thumb_title\">").collect::<Vec<&str>>()[1]
                .split("<")
                .collect::<Vec<&str>>()[0]
                .to_string();
            // html decode
            title = decode(title.as_bytes()).to_string().unwrap_or(title);
            let id = video_segment.split("https://rule34video.com/video/").collect::<Vec<&str>>()[1].split("/").collect::<Vec<&str>>()[0].to_string();
            let raw_duration = video_segment.split("<div class=\"time\">").collect::<Vec<&str>>()[1]
                    .split("<")
                    .collect::<Vec<&str>>()[0]
                    .to_string();
            let duration = parse_time_to_seconds(&raw_duration).unwrap_or(0) as u32;
            let views = parse_abbreviated_number(&video_segment
                .split("<div class=\"views\">").collect::<Vec<&str>>()[1].split("</svg>").collect::<Vec<&str>>()[1]
                .split("<")
                .collect::<Vec<&str>>()[0]).unwrap_or(0);
//https://rule34video.com/get_file/47/5e71602b7642f9b997f90c979a368c99b8aad90d89/3942000/3942353/3942353_preview.mp4/
//https://rule34video.com/get_file/47/5e71602b7642f9b997f90c979a368c99b8aad90d89/3942000/3942353/3942353_preview.mp4/
            let thumb = video_segment.split("<img class=\"thumb lazy-load\" src=\"").collect::<Vec<&str>>()[1].split("data-original=\"").collect::<Vec<&str>>()[1]
                .split("\"")
                .collect::<Vec<&str>>()[0]
                .to_string();
            let url = video_segment.split("<a class=\"th js-open-popup\" href=\"").collect::<Vec<&str>>()[1]
                .split("\"")
                .collect::<Vec<&str>>()[0]
                .to_string();
            // let preview = video_segment.split("<div class=\"img wrap_image\" data-preview=\"").collect::<Vec<&str>>()[1]
            //     .split("\"")
            //     .collect::<Vec<&str>>()[0]
            //     .to_string();


            let video_item = VideoItem::new(
                id,
                title,
                url.to_string(),
                "Rule34video".to_string(),
                thumb,
                duration,
            )
            .views(views)
            // .preview(preview)
            ;


            items.push(video_item);
        }
        return items;
    }


}

#[async_trait]
impl Provider for Rule34videoProvider {
    async fn get_videos(
        &self,
        cache: VideoCache,
        pool: DbPool,
        sort: String,
        query: Option<String>,
        page: String,
        per_page: String,
        options: ServerOptions,
    ) -> Vec<VideoItem> {
        let _ = options;
        let _ = per_page;
        let _ = pool; // Ignored in this implementation
        let videos: std::result::Result<Vec<VideoItem>, Error> = match query {
            Some(q) => {
                self.query(cache, page.parse::<u8>().unwrap_or(1), &q, &sort, options)
                    .await
            }
            None => {
                self.get(cache, page.parse::<u8>().unwrap_or(1), &sort, options)
                    .await
            }
        };
        match videos {
            Ok(v) => v,
            Err(e) => {
                println!("Error fetching videos: {}", e);
                vec![]
            }
        }
    }
}