use crate::DbPool;
use crate::api::ClientVersion;
use crate::providers::Provider;
use crate::status::*;
use crate::util::cache::VideoCache;
use crate::util::parse_abbreviated_number;
use crate::util::time::parse_time_to_seconds;
use crate::videos::{ServerOptions, VideoItem};
use async_trait::async_trait;
use error_chain::error_chain;
use htmlentity::entity::{ICodedDataTrait, decode};
use std::sync::{Arc, RwLock};
use std::vec;

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

#[derive(Debug, Clone)]
pub struct Tube8Provider {
    url: String,
    sites: Arc<RwLock<Vec<FilterOption>>>,
    stars: Arc<RwLock<Vec<FilterOption>>>,
}
impl Tube8Provider {
    pub fn new() -> Self {
        let provider = Tube8Provider {
            url: "https://www.tube8.com".to_string(),
            sites: Arc::new(RwLock::new(vec![FilterOption {
                id: "all".to_string(),
                title: "All".to_string(),
            }])),
            stars: Arc::new(RwLock::new(vec![FilterOption {
                id: "all".to_string(),
                title: "All".to_string(),
            }])),
        };

        // Kick off the background load but return immediately
        provider
    }

    // Push one item with minimal lock time and dedup by id
    fn push_unique(target: &Arc<RwLock<Vec<FilterOption>>>, item: FilterOption) {
        if let Ok(mut vec) = target.write() {
            if !vec.iter().any(|x| x.id == item.id) {
                vec.push(item);
                // Optional: keep it sorted for nicer UX
                // vec.sort_by(|a,b| a.title.cmp(&b.title));
            }
        }
    }

    fn build_channel(&self, clientversion: ClientVersion) -> Channel {
        let _ = clientversion;
        let sites: Vec<FilterOption> = self
            .sites
            .read()
            .map(|g| g.clone()) // or: .map(|g| g.to_vec())
            .unwrap_or_default(); // or: .unwrap_or_else(|_| Vec::new())

        let stars: Vec<FilterOption> = self
            .stars
            .read()
            .map(|g| g.clone()) // or: .map(|g| g.to_vec())
            .unwrap_or_default(); // or: .unwrap_or_else(|_| Vec::new())

        Channel {
            id: "tube8".to_string(),
            name: "Tube8".to_string(),
            description: "Tube8 Videos".to_string(),
            premium: false,
            favicon: "https://www.google.com/s2/favicons?sz=64&domain=www.tube8.com".to_string(),
            status: "active".to_string(),
            categories: vec![],
            options: vec![
                ChannelOption {
                    id: "sort".to_string(),
                    title: "Sort".to_string(),
                    description: "Sort the Videos".to_string(),
                    systemImage: "list.number".to_string(),
                    colorName: "blue".to_string(),
                    options: vec![
                        FilterOption {
                            id: "rating".into(),
                            title: "Rating".into(),
                        },
                        FilterOption {
                            id: "mostviewed.html".into(),
                            title: "Most Viewed".into(),
                        },
                        FilterOption {
                            id: "longest.html".into(),
                            title: "Duration".into(),
                        },
                        FilterOption {
                            id: "newest.html".into(),
                            title: "Newest".into(),
                        },
                    ],
                    multiSelect: false,
                },
                ChannelOption {
                    id: "sites".to_string(),
                    title: "Sites".to_string(),
                    description: "Filter for different Sites".to_string(),
                    systemImage: "rectangle.stack".to_string(),
                    colorName: "green".to_string(),
                    options: sites,
                    multiSelect: false,
                },
                ChannelOption {
                    id: "stars".to_string(),
                    title: "Stars".to_string(),
                    description: "Filter for different Pornstars".to_string(),
                    systemImage: "star.fill".to_string(),
                    colorName: "yellow".to_string(),
                    options: stars,
                    multiSelect: false,
                },
            ],
            nsfw: true,
            cacheDuration: None,
        }
    }

    async fn get(
        &self,
        cache: VideoCache,
        page: u8,
        sort: &str,
        options: ServerOptions,
    ) -> Result<Vec<VideoItem>> {
        let mut sort_string: String = match sort {
            "mostviewed.html" => "mostviewed.html/".to_string(),
            "longest.html" => "longest.html/".to_string(),
            "newest.html" => "newest.html/".to_string(),
            _ => "".to_string(),
        };
        if options.sites.is_some()
            && !options.sites.as_ref().unwrap().is_empty()
            && options.sites.as_ref().unwrap() != "all"
        {
            sort_string = match sort {
                "mostviewed.html" => "?orderBy=mv&page=".to_string(),
                "longest.html" => "?orderBy=ln&page=".to_string(),
                "newest.html" => "?page=".to_string(),
                _ => "?orderBy=tr&page=".to_string(),
            };
        }
        if options.stars.is_some()
            && !options.stars.as_ref().unwrap().is_empty()
            && options.stars.as_ref().unwrap() != "all"
        {
            sort_string = match sort {
                "mostviewed.html" => "views/?page=".to_string(),
                "longest.html" => "duration/?page=".to_string(),
                "newest.html" => "?page=".to_string(),
                _ => "rating/?page=".to_string(),
            };
        }
        let video_url = format!("{}/{}{}", self.url, sort_string, page);
        let old_items = match cache.get(&video_url) {
            Some((time, items)) => {
                if time.elapsed().unwrap_or_default().as_secs() < 60 * 5 {
                    return Ok(items.clone());
                } else {
                    items.clone()
                }
            }
            None => {
                vec![]
            }
        };

        let mut requester = options.requester.clone().unwrap();
        let text = requester.get(&video_url, None).await.unwrap();
        let video_items: Vec<VideoItem> = self.get_video_items_from_html(text.clone());
        if !video_items.is_empty() {
            cache.remove(&video_url);
            cache.insert(video_url.clone(), video_items.clone());
        } else {
            return Ok(old_items);
        }
        Ok(video_items)
    }

    async fn query(
        &self,
        cache: VideoCache,
        page: u8,
        query: &str,
        options: ServerOptions,
    ) -> Result<Vec<VideoItem>> {
        let mut sort_string: String = match options.sort.as_ref().unwrap().as_str() {
            "mostviewed.html" => "&orderby=views&page=".to_string(),
            "longest.html" => "&orderby=longest&page=".to_string(),
            "newest.html" => "&orderby=newest&page=".to_string(),
            _ => "&orderby=rating&page=".to_string(),
        };
        let mut search_string = query.to_string().to_ascii_lowercase().trim().to_string();
        let mut video_url = format!(
            "{}/searches.html/?q={}{}{}",
            self.url, query, sort_string, page
        );
        video_url = video_url.replace(" ", "+");
        match self
            .stars
            .read()
            .unwrap()
            .iter()
            .find(|s| s.title.to_ascii_lowercase() == search_string)
        {
            Some(star) => {
                sort_string = match options.sort.as_ref().unwrap().as_str() {
                    "mostviewed.html" => "views/?page=".to_string(),
                    "longest.html" => "duration/?page=".to_string(),
                    "newest.html" => "?page=".to_string(),
                    _ => "rating/?page=".to_string(),
                };
                video_url = format!("{}/{}{}{}", self.url, star.id, sort_string, page);
            }
            _ => {}
        }
        match self
            .sites
            .read()
            .unwrap()
            .iter()
            .find(|s| s.title.to_ascii_lowercase() == search_string)
        {
            Some(site) => {
                sort_string = match options.sort.as_ref().unwrap().as_str() {
                    "mostviewed.html" => "?orderBy=mv&page=".to_string(),
                    "longest.html" => "?orderBy=ln&page=".to_string(),
                    "newest.html" => "?page=".to_string(),
                    _ => "?orderBy=tr&page=".to_string(),
                };
                video_url = format!("{}/{}{}{}", self.url, site.id, sort_string, page);
            }
            _ => {}
        }
        // Check our Video Cache. If the result is younger than 1 hour, we return it.
        let old_items = match cache.get(&video_url) {
            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(&video_url, None).await.unwrap();
        let video_items: Vec<VideoItem> = self.get_video_items_from_html(text.clone());
        if !video_items.is_empty() {
            cache.remove(&video_url);
            cache.insert(video_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();
        if !html.contains("video-box ") {
            return items;
        }
        let raw_videos = html.split("id=\"pagination\"").collect::<Vec<&str>>()[0]
            .split("-thumbs")
            .collect::<Vec<&str>>()[1]
            .split("video-box ")
            .collect::<Vec<&str>>()[1..]
            .to_vec();
        for video_segment in &raw_videos {
            // let vid = video_segment.split("\n").collect::<Vec<&str>>();
            // for (index, line) in vid.iter().enumerate() {
            //     println!("Line {}: {}", index, line);
            // }
            let video_url: String = format!("{}{}", self.url, video_segment.split("<a href=\"").collect::<Vec<&str>>()[1]
                .split("\"")
                .collect::<Vec<&str>>()[0]
                .to_string());
            let mut title = video_segment.split("alt=\"").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_url.split("/").collect::<Vec<&str>>()[4].to_string();

            let thumb = match video_segment.split("thumb-image ").collect::<Vec<&str>>()[1]
                .contains("data-src=\"")
            {
                true => video_segment.split("thumb-image ").collect::<Vec<&str>>()[1]
                    .split("data-src=\"")
                    .collect::<Vec<&str>>()[1]
                    .split("\"")
                    .collect::<Vec<&str>>()[0]
                    .to_string(),
                false => video_segment.split("thumb-image ").collect::<Vec<&str>>()[1]
                    .split("data-poster=\"")
                    .collect::<Vec<&str>>()[1]
                    .split("\"")
                    .collect::<Vec<&str>>()[0]
                    .to_string(),
            };
            let raw_duration = video_segment
                .split("video-duration ")
                .collect::<Vec<&str>>()[1]
                .split("</span>")
                .collect::<Vec<&str>>()[0]
                .split("<span>")
                .collect::<Vec<&str>>()
                .last()
                .unwrap_or(&"")
                .replace("\n", "")
                .trim()
                .to_string();
            let duration = parse_time_to_seconds(raw_duration.as_str()).unwrap_or(0) as u32;
            let views = parse_abbreviated_number(
                video_segment
                    .split("<span class='info-views'>")
                    .collect::<Vec<&str>>()[1]
                    .split("<")
                    .collect::<Vec<&str>>()[0]
                    .to_string()
                    .as_str(),
            )
            .unwrap_or(0) as u32;
            let site_name = title
                .split("]")
                .collect::<Vec<&str>>()
                .first()
                .unwrap_or(&"")
                .trim_start_matches("[");
            let site_id = self
                .get_site_id_from_name(site_name)
                .unwrap_or("".to_string());
            let mut tags = match video_segment.contains("class=\"models\">") {
                true => video_segment
                    .split("class=\"models\">")
                    .collect::<Vec<&str>>()[1]
                    .split("</div>")
                    .collect::<Vec<&str>>()[0]
                    .split("href=\"")
                    .collect::<Vec<&str>>()[1..]
                    .into_iter()
                    .map(|s| {
                        Self::push_unique(
                            &self.stars,
                            FilterOption {
                                id: s.split("/").collect::<Vec<&str>>()[4].to_string(),
                                title: s.split(">").collect::<Vec<&str>>()[1]
                                    .split("<")
                                    .collect::<Vec<&str>>()[0]
                                    .trim()
                                    .to_string(),
                            },
                        );
                        s.split(">").collect::<Vec<&str>>()[1]
                            .split("<")
                            .collect::<Vec<&str>>()[0]
                            .trim()
                            .to_string()
                    })
                    .collect::<Vec<String>>()
                    .to_vec(),
                false => vec![],
            };
            if !site_id.is_empty() {
                Self::push_unique(
                    &self.sites,
                    FilterOption {
                        id: site_id,
                        title: site_name.to_string(),
                    },
                );
                tags.push(site_name.to_string());
            }

            let video_item = VideoItem::new(
                id,
                title,
                video_url.to_string(),
                "omgxxx".to_string(),
                thumb,
                duration,
            )
            .views(views)
            .preview(preview)
            .tags(tags);
            items.push(video_item);
        }
        return items;
    }
}

#[async_trait]
impl Provider for Tube8Provider {
    async fn get_videos(
        &self,
        cache: VideoCache,
        pool: DbPool,
        sort: String,
        query: Option<String>,
        page: String,
        per_page: String,
        options: ServerOptions,
    ) -> Vec<VideoItem> {
        let _ = per_page;
        let _ = pool;
        let videos: std::result::Result<Vec<VideoItem>, Error> = match query {
            Some(q) => {
                self.query(cache, page.parse::<u8>().unwrap_or(1), &q, 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![]
            }
        }
    }
    fn get_channel(&self, clientversion: ClientVersion) -> Option<crate::status::Channel> {
        Some(self.build_channel(clientversion))
    }
}