use crate::DbPool;
use crate::api::ClientVersion;
use crate::providers::{Provider, report_provider_error, report_provider_error_background};
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 crate::{status::*, util};
use async_trait::async_trait;
use error_chain::error_chain;
use htmlentity::entity::{ICodedDataTrait, decode};
use std::sync::{Arc, RwLock};
use std::thread;
use std::vec;

pub const CHANNEL_METADATA: crate::providers::ProviderChannelMetadata =
    crate::providers::ProviderChannelMetadata {
        group_id: "studio-network",
        tags: &["tube", "networked", "mixed"],
    };

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

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

    fn spawn_initial_load(&self) {
        let url = self.url.clone();
        let sites = Arc::clone(&self.sites);
        let networks = Arc::clone(&self.networks);
        let stars = Arc::clone(&self.stars);

        thread::spawn(move || {
            // Create a tiny runtime just for these async tasks
            let rt = match tokio::runtime::Builder::new_current_thread()
                .enable_all()
                .build()
            {
                Ok(rt) => rt,
                Err(e) => {
                    report_provider_error_background(
                        "freepornvideosxxx",
                        "spawn_initial_load.runtime_build",
                        &e.to_string(),
                    );
                    return;
                }
            };

            rt.block_on(async move {
                // If you have a streaming sites loader, call it here too
                if let Err(e) = Self::load_sites(&url, sites).await {
                    eprintln!("load_sites_into failed: {e}");
                }

                if let Err(e) = Self::load_networks(&url, networks).await {
                    eprintln!("load_networks failed: {e}");
                }

                if let Err(e) = Self::load_stars(&url, stars).await {
                    eprintln!("load_stars failed: {e}");
                }
            });
        });
    }

    async fn load_stars(base_url: &str, stars: Arc<RwLock<Vec<FilterOption>>>) -> Result<()> {
        let mut requester = util::requester::Requester::new();
        for page in [1..10].into_iter().flatten() {
            let text = match requester
                .get(
                    format!("{}/models/total-videos/{}/?gender_id=0", &base_url, page).as_str(),
                    None,
                )
                .await
            {
                Ok(text) => text,
                Err(e) => {
                    report_provider_error_background(
                        "freepornvideosxxx",
                        "load_stars.request",
                        &format!("url={base_url}; page={page}; error={e}"),
                    );
                    break;
                }
            };
            if text.contains("404 Not Found") || text.is_empty() {
                break;
            }
            let stars_div = text
                .split("<div class=\"list-models\">")
                .collect::<Vec<&str>>()
                .last()
                .copied()
                .unwrap_or_default()
                .split("custom_list_models_models_list_pagination")
                .collect::<Vec<&str>>()
                .get(0)
                .copied()
                .unwrap_or_default();
            for stars_element in stars_div.split("<a ").collect::<Vec<&str>>()[1..].to_vec() {
                let star_url = stars_element
                    .split("href=\"")
                    .collect::<Vec<&str>>()
                    .get(1)
                    .copied()
                    .unwrap_or_default()
                    .split("\"")
                    .collect::<Vec<&str>>()
                    .get(0)
                    .copied()
                    .unwrap_or_default();
                let star_id = star_url
                    .split("/")
                    .collect::<Vec<&str>>()
                    .get(4)
                    .copied()
                    .unwrap_or_default()
                    .to_string();
                let star_name = stars_element
                    .split("<strong class=\"title\">")
                    .collect::<Vec<&str>>()
                    .get(1)
                    .copied()
                    .unwrap_or_default()
                    .split("<")
                    .collect::<Vec<&str>>()
                    .get(0)
                    .copied()
                    .unwrap_or_default()
                    .to_string();
                Self::push_unique(
                    &stars,
                    FilterOption {
                        id: star_id,
                        title: star_name,
                    },
                );
            }
        }
        return Ok(());
    }

    async fn load_sites(base_url: &str, sites: Arc<RwLock<Vec<FilterOption>>>) -> Result<()> {
        let mut requester = util::requester::Requester::new();
        let mut page = 0;
        loop {
            page += 1;
            let text = requester
                .get(format!("{}/sites/{}/", &base_url, page).as_str(), None)
                .await;
            let text = match text {
                Ok(text) => text,
                Err(e) => {
                    report_provider_error_background(
                        "freepornvideosxxx",
                        "load_sites.request",
                        &format!("url={base_url}; page={page}; error={e}"),
                    );
                    break;
                }
            };
            if text.contains("404 Not Found") || text.is_empty() {
                break;
            }
            let sites_div = text
                .split("id=\"list_content_sources_sponsors_list_items\"")
                .collect::<Vec<&str>>()
                .get(1)
                .copied()
                .unwrap_or_default()
                .split("class=\"pagination\"")
                .collect::<Vec<&str>>()
                .get(0)
                .copied()
                .unwrap_or_default();
            for sites_element in
                sites_div.split("class=\"headline\"").collect::<Vec<&str>>()[1..].to_vec()
            {
                let site_url = sites_element
                    .split("href=\"")
                    .collect::<Vec<&str>>()
                    .get(1)
                    .copied()
                    .unwrap_or_default()
                    .split("\"")
                    .collect::<Vec<&str>>()
                    .get(0)
                    .copied()
                    .unwrap_or_default();
                let site_id = site_url
                    .split("/")
                    .collect::<Vec<&str>>()
                    .get(4)
                    .copied()
                    .unwrap_or_default()
                    .to_string();
                let site_name = sites_element
                    .split("<h2>")
                    .collect::<Vec<&str>>()
                    .get(1)
                    .copied()
                    .unwrap_or_default()
                    .split("<")
                    .collect::<Vec<&str>>()
                    .get(0)
                    .copied()
                    .unwrap_or_default()
                    .to_string();
                Self::push_unique(
                    &sites,
                    FilterOption {
                        id: site_id,
                        title: site_name,
                    },
                );
            }
        }
        return Ok(());
    }

    async fn load_networks(base_url: &str, networks: Arc<RwLock<Vec<FilterOption>>>) -> Result<()> {
        let mut requester = util::requester::Requester::new();
        let text = match requester.get(&base_url, None).await {
            Ok(text) => text,
            Err(e) => {
                report_provider_error_background(
                    "freepornvideosxxx",
                    "load_networks.request",
                    &format!("url={base_url}; error={e}"),
                );
                return Ok(());
            }
        };
        let networks_div = text
            .split("class=\"sites__list\"")
            .collect::<Vec<&str>>()
            .get(1)
            .copied()
            .unwrap_or_default()
            .split("</div>")
            .collect::<Vec<&str>>()
            .get(0)
            .copied()
            .unwrap_or_default();
        for network_element in
            networks_div.split("sites__item").collect::<Vec<&str>>()[1..].to_vec()
        {
            if network_element.contains("sites__all") {
                continue;
            }
            let network_url = network_element
                .split("href=\"")
                .collect::<Vec<&str>>()
                .get(1)
                .copied()
                .unwrap_or_default()
                .split("\"")
                .collect::<Vec<&str>>()
                .get(0)
                .copied()
                .unwrap_or_default();
            let network_id = network_url
                .split("/")
                .collect::<Vec<&str>>()
                .get(4)
                .copied()
                .unwrap_or_default()
                .to_string();
            let network_name = network_element
                .split(">")
                .collect::<Vec<&str>>()
                .get(1)
                .copied()
                .unwrap_or_default()
                .split("<")
                .collect::<Vec<&str>>()
                .get(0)
                .copied()
                .unwrap_or_default()
                .to_string();
            Self::push_unique(
                &networks,
                FilterOption {
                    id: network_id,
                    title: network_name,
                },
            );
        }
        return Ok(());
    }

    // 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 networks: Vec<FilterOption> = self
            .networks
            .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: "freepornvideosxxx".to_string(),
            name: "FreePornVideos XXX".to_string(),
            description: "Free Porn Videos".to_string(),
            premium: false,
            favicon: "https://www.google.com/s2/favicons?sz=64&domain=www.freepornvideos.xxx"
                .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: "latest-updates".into(),
                            title: "Latest".into(),
                        },
                        FilterOption {
                            id: "most-popular".into(),
                            title: "Most Viewed".into(),
                        },
                        FilterOption {
                            id: "top-rated".into(),
                            title: "Top Rated".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: "networks".to_string(),
                    title: "Networks".to_string(),
                    description: "Filter for different Networks".to_string(),
                    systemImage: "list.dash".to_string(),
                    colorName: "purple".to_string(),
                    options: networks,
                    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,
            ytdlpCommand: Some("yt-dlp --impersonate chrome-120".to_string())
        }
    }

    async fn get(
        &self,
        cache: VideoCache,
        page: u8,
        sort: &str,
        options: ServerOptions,
    ) -> Result<Vec<VideoItem>> {
        let mut sort_string: String = match sort {
            "top-rated" => "top-rated".to_string(),
            "most-popular" => "most-popular".to_string(),
            _ => "latest-updates".to_string(),
        };
        let alt_sort_string: String = match sort {
            "top-rated" => "/top-rated".to_string(),
            "most-popular" => "/most-popular".to_string(),
            _ => "".to_string(),
        };
        if let Some(network) = options.network.as_deref() {
            if !network.is_empty() && network != "all" {
                sort_string = format!("networks/{}{}", network, alt_sort_string);
            }
        }
        if let Some(site) = options.sites.as_deref() {
            if !site.is_empty() && site != "all" {
                sort_string = format!("sites/{}{}", site, alt_sort_string);
            }
        }
        if let Some(star) = options.stars.as_deref() {
            if !star.is_empty() && star != "all" {
                sort_string = format!("models/{}{}", star, alt_sort_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 =
            crate::providers::requester_or_default(&options, module_path!(), "missing_requester");
        let text = match requester.get(&video_url, None).await {
            Ok(text) => text,
            Err(e) => {
                report_provider_error(
                    "freepornvideosxxx",
                    "get.request",
                    &format!("url={video_url}; error={e}"),
                )
                .await;
                return Ok(old_items);
            }
        };
        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 search_type = "search";
        let mut search_string = query.to_string().to_ascii_lowercase().trim().to_string();
        match self.stars.read() {
            Ok(stars) => {
                if let Some(star) = stars
                    .iter()
                    .find(|s| s.title.to_ascii_lowercase() == search_string)
                {
                    search_type = "models";
                    search_string = star.id.clone();
                }
            }
            Err(e) => {
                report_provider_error_background(
                    "freepornvideosxxx",
                    "query.stars_read",
                    &e.to_string(),
                );
            }
        }
        match self.sites.read() {
            Ok(sites) => {
                if let Some(site) = sites
                    .iter()
                    .find(|s| s.title.to_ascii_lowercase() == search_string)
                {
                    search_type = "sites";
                    search_string = site.id.clone();
                }
            }
            Err(e) => {
                report_provider_error_background(
                    "freepornvideosxxx",
                    "query.sites_read",
                    &e.to_string(),
                );
            }
        }
        let mut video_url = format!("{}/{}/{}/{}/", self.url, search_type, search_string, page);
        video_url = video_url.replace(" ", "+");
        // 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 =
            crate::providers::requester_or_default(&options, module_path!(), "missing_requester");
        let text = match requester.get(&video_url, None).await {
            Ok(text) => text,
            Err(e) => {
                report_provider_error(
                    "freepornvideosxxx",
                    "query.request",
                    &format!("url={video_url}; error={e}"),
                )
                .await;
                return Ok(old_items);
            }
        };
        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_site_id_from_name(&self, site_name: &str) -> Option<String> {
        // site_name.to_lowercase().replace(" ", "")
        let sites_guard = match self.sites.read() {
            Ok(guard) => guard,
            Err(e) => {
                report_provider_error_background(
                    "freepornvideosxxx",
                    "get_site_id_from_name.sites_read",
                    &e.to_string(),
                );
                return None;
            }
        };
        for site in sites_guard.iter() {
            if site
                .title
                .to_lowercase()
                .replace(" ", "")
                .replace(".com", "")
                == site_name.to_lowercase().replace(" ", "")
            {
                return Some(site.id.clone());
            }
        }
        return None;
    }

    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("class=\"item\"") {
            return items;
        }
        let raw_videos = html
            .split("videos_list_pagination")
            .collect::<Vec<&str>>()
            .get(0)
            .copied()
            .unwrap_or_default()
            .split(" class=\"pagination\" ")
            .collect::<Vec<&str>>()
            .get(0)
            .copied()
            .unwrap_or_default()
            .split("class=\"list-videos\"")
            .collect::<Vec<&str>>()
            .get(1)
            .copied()
            .unwrap_or_default()
            .split("class=\"item\"")
            .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 = video_segment
                .split("<a href=\"")
                .collect::<Vec<&str>>()
                .get(1)
                .copied()
                .unwrap_or_default()
                .split("\"")
                .collect::<Vec<&str>>()
                .get(0)
                .copied()
                .unwrap_or_default()
                .to_string();
            let mut title = video_segment
                .split(" title=\"")
                .collect::<Vec<&str>>()
                .get(1)
                .copied()
                .unwrap_or_default()
                .split("\"")
                .collect::<Vec<&str>>()
                .get(0)
                .copied()
                .unwrap_or_default()
                .to_string();
            // html decode
            title = decode(title.as_bytes()).to_string().unwrap_or(title);
            let id = video_url
                .split("/")
                .collect::<Vec<&str>>()
                .get(4)
                .copied()
                .unwrap_or_default()
                .to_string();

            let thumb = match video_segment
                .split("<img ")
                .collect::<Vec<&str>>()
                .get(1)
                .copied()
                .unwrap_or_default()
                .contains("data-src=\"")
            {
                true => video_segment
                    .split("<img ")
                    .collect::<Vec<&str>>()
                    .get(1)
                    .copied()
                    .unwrap_or_default()
                    .split("data-src=\"")
                    .collect::<Vec<&str>>()
                    .get(1)
                    .copied()
                    .unwrap_or_default()
                    .split("\"")
                    .collect::<Vec<&str>>()
                    .get(0)
                    .copied()
                    .unwrap_or_default()
                    .to_string(),
                false => video_segment
                    .split("<img ")
                    .collect::<Vec<&str>>()
                    .get(1)
                    .copied()
                    .unwrap_or_default()
                    .split("src=\"")
                    .collect::<Vec<&str>>()
                    .get(1)
                    .copied()
                    .unwrap_or_default()
                    .split("\"")
                    .collect::<Vec<&str>>()
                    .get(0)
                    .copied()
                    .unwrap_or_default()
                    .to_string(),
            };
            let raw_duration = video_segment
                .split("<span class=\"duration\">")
                .collect::<Vec<&str>>()
                .get(1)
                .copied()
                .unwrap_or_default()
                .split("<")
                .collect::<Vec<&str>>()
                .get(0)
                .copied()
                .unwrap_or_default()
                .split(" ")
                .collect::<Vec<&str>>()
                .last()
                .unwrap_or(&"")
                .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("<div class=\"views\">")
                    .collect::<Vec<&str>>()
                    .get(1)
                    .copied()
                    .unwrap_or_default()
                    .split("<")
                    .collect::<Vec<&str>>()
                    .get(0)
                    .copied()
                    .unwrap_or_default()
                    .to_string()
                    .as_str(),
            )
            .unwrap_or(0) as u32;

            let preview = video_segment
                .split("data-preview=\"")
                .collect::<Vec<&str>>()
                .get(1)
                .copied()
                .unwrap_or_default()
                .split("\"")
                .collect::<Vec<&str>>()
                .get(0)
                .copied()
                .unwrap_or_default()
                .to_string();
            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>>()
                    .get(1)
                    .copied()
                    .unwrap_or_default()
                    .split("</div>")
                    .collect::<Vec<&str>>()
                    .get(0)
                    .copied()
                    .unwrap_or_default()
                    .split("href=\"")
                    .collect::<Vec<&str>>()[1..]
                    .into_iter()
                    .map(|s| {
                        Self::push_unique(
                            &self.stars,
                            FilterOption {
                                id: s
                                    .split("/")
                                    .collect::<Vec<&str>>()
                                    .get(4)
                                    .copied()
                                    .unwrap_or_default()
                                    .to_string(),
                                title: s
                                    .split(">")
                                    .collect::<Vec<&str>>()
                                    .get(1)
                                    .copied()
                                    .unwrap_or_default()
                                    .split("<")
                                    .collect::<Vec<&str>>()
                                    .get(0)
                                    .copied()
                                    .unwrap_or_default()
                                    .trim()
                                    .to_string(),
                            },
                        );
                        s.split(">")
                            .collect::<Vec<&str>>()
                            .get(1)
                            .copied()
                            .unwrap_or_default()
                            .split("<")
                            .collect::<Vec<&str>>()
                            .get(0)
                            .copied()
                            .unwrap_or_default()
                            .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(),
                "freepornvideosxxx".to_string(),
                thumb,
                duration,
            )
            .views(views)
            .preview(preview)
            .tags(tags);
            items.push(video_item);
        }
        return items;
    }
}

#[async_trait]
impl Provider for FreepornvideosxxxProvider {
    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))
    }
}
