use crate::DbPool;
use crate::api::*;
use crate::providers::{Provider, report_provider_error};
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::vec;

pub const CHANNEL_METADATA: crate::providers::ProviderChannelMetadata =
    crate::providers::ProviderChannelMetadata {
        group_id: "ai",
        tags: &["rule34", "ai-generated", "animation"],
    };

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

#[derive(Debug, Clone)]
pub struct Rule34genProvider {
    url: String,
}
impl Rule34genProvider {
    pub fn new() -> Self {
        Rule34genProvider {
            url: "https://rule34gen.com".to_string(),
        }
    }

    fn build_channel(&self, clientversion: ClientVersion) -> Channel {
        let _ = clientversion;
        Channel {
            id: "rule34gen".to_string(),
            name: "Rule34Gen".to_string(),
            description: "If it exists, here might be an AI generated video of it".to_string(),
            premium: false,
            favicon: "https://www.google.com/s2/favicons?sz=64&domain=rule34gen.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(), //"Sort the videos by Date or Name.".to_string(),
                systemImage: "list.number".to_string(),
                colorName: "blue".to_string(),
                options: vec![
                    FilterOption {
                        id: "post_date".to_string(),
                        title: "Newest".to_string(),
                    },
                    FilterOption {
                        id: "video_viewed".to_string(),
                        title: "Most Viewed".to_string(),
                    },
                    FilterOption {
                        id: "rating".to_string(),
                        title: "Top Rated".to_string(),
                    },
                    FilterOption {
                        id: "duration".to_string(),
                        title: "Longest".to_string(),
                    },
                    FilterOption {
                        id: "pseudo_random".to_string(),
                        title: "Random".to_string(),
                    },
                ],
                multiSelect: false,
            }],
            nsfw: true,
            cacheDuration: Some(1800),
            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 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!("rule34gen:{}:{}", page, sort);
        let url = if page <= 1 {
            format!("{}/?sort_by={}", self.url, sort)
        } else {
            format!("{}/{}/?sort_by={}", self.url, page, sort)
        };

        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 =
            crate::providers::requester_or_default(&options, module_path!(), "missing_requester");
        let text = match requester.get(&url, None).await {
            Ok(text) => text,
            Err(e) => {
                report_provider_error("rule34gen", "get.request", &format!("url={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(&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 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!("rule34gen:{}:{}:{}", page, sort, query);
        let search_slug = query.replace(" ", "-");
        let url = if page <= 1 {
            format!("{}/search/{}/?sort_by={}", self.url, search_slug, sort)
        } else {
            format!(
                "{}/search/{}/{}/?sort_by={}",
                self.url, search_slug, page, sort
            )
        };

        // 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 =
            crate::providers::requester_or_default(&options, module_path!(), "missing_requester");
        let text = match requester.get(&url, None).await {
            Ok(text) => text,
            Err(e) => {
                report_provider_error(
                    "rule34gen",
                    "query.request",
                    &format!("url={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(&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();
        if html.contains("cards__item") {
            for video_segment in html.split("<div class=\"cards__item\"").skip(1) {
                let video_url = video_segment
                    .split("href=\"")
                    .nth(1)
                    .and_then(|s| s.split('"').next())
                    .unwrap_or_default()
                    .to_string();
                if !video_url.contains("/video/") {
                    continue;
                }

                let id = video_url
                    .split("/video/")
                    .nth(1)
                    .and_then(|s| s.split('/').next())
                    .unwrap_or_default()
                    .to_string();
                if id.is_empty() {
                    continue;
                }

                let mut title = video_segment
                    .split("title=\"")
                    .nth(1)
                    .and_then(|s| s.split('"').next())
                    .unwrap_or_default()
                    .to_string();
                if title.is_empty() {
                    title = video_segment
                        .split("<span class=\"card__title\">")
                        .nth(1)
                        .and_then(|s| s.split('<').next())
                        .unwrap_or_default()
                        .trim()
                        .to_string();
                }
                title = decode(title.as_bytes()).to_string().unwrap_or(title);

                let thumb = video_segment
                    .split("data-original=\"")
                    .nth(1)
                    .and_then(|s| s.split('"').next())
                    .unwrap_or_default()
                    .to_string();
                let preview = video_segment
                    .split("data-preview=\"")
                    .nth(1)
                    .and_then(|s| s.split('"').next())
                    .unwrap_or_default()
                    .to_string();
                let raw_duration = video_segment
                    .split("card__label card__label--primary\">")
                    .nth(1)
                    .and_then(|s| s.split('<').next())
                    .unwrap_or_default()
                    .trim()
                    .to_string();
                let duration = parse_time_to_seconds(&raw_duration).unwrap_or(0) as u32;

                let views_text = video_segment
                    .split("<small class=\"card__text\">")
                    .nth(2)
                    .and_then(|s| s.split("</small>").next())
                    .unwrap_or_default()
                    .replace("views", "")
                    .replace(' ', "")
                    .trim()
                    .to_string();
                let views = parse_abbreviated_number(views_text.as_str()).unwrap_or(0) as u32;

                items.push(
                    VideoItem::new(
                        id,
                        title,
                        video_url,
                        "rule34gen".to_string(),
                        thumb,
                        duration,
                    )
                    .views(views)
                    .preview(preview),
                );
            }
            return items;
        }
        let video_listing_content = html
            .split("<div class=\"thumbs clearfix\" id=\"custom_list_videos")
            .collect::<Vec<&str>>()
            .get(1)
            .copied()
            .unwrap_or_default()
            .split("<div class=\"pagination\"")
            .collect::<Vec<&str>>()
            .get(0)
            .copied()
            .unwrap_or_default()
            .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>>().get(1).copied().unwrap_or_default()
            // for (index, line) in vid.iter().enumerate() {
            //     println!("Line {}: {}", index, line);
            // }

            if video_segment.contains("https://rule34gen.com/images/advertisements") {
                continue;
            }

            let mut title = video_segment
                .split("<div class=\"thumb_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_segment
                .split("https://rule34gen.com/video/")
                .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("<div class=\"time\">")
                .collect::<Vec<&str>>()
                .get(1)
                .copied()
                .unwrap_or_default()
                .split("<")
                .collect::<Vec<&str>>()
                .get(0)
                .copied()
                .unwrap_or_default()
                .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>>()
                    .get(1)
                    .copied()
                    .unwrap_or_default()
                    .split("</svg>")
                    .collect::<Vec<&str>>()
                    .get(1)
                    .copied()
                    .unwrap_or_default()
                    .split("<")
                    .collect::<Vec<&str>>()
                    .get(0)
                    .copied()
                    .unwrap_or_default(),
            )
            .unwrap_or(0);
            //https://rule34gen.com/get_file/47/5e71602b7642f9b997f90c979a368c99b8aad90d89/3942000/3942353/3942353_preview.mp4/
            //https://rule34gen.com/get_file/47/5e71602b7642f9b997f90c979a368c99b8aad90d89/3942000/3942353/3942353_preview.mp4/
            let thumb = video_segment
                .split("<img class=\"thumb lazy-load\" src=\"")
                .collect::<Vec<&str>>()
                .get(1)
                .copied()
                .unwrap_or_default()
                .split("data-original=\"")
                .collect::<Vec<&str>>()
                .get(1)
                .copied()
                .unwrap_or_default()
                .split("\"")
                .collect::<Vec<&str>>()
                .get(0)
                .copied()
                .unwrap_or_default()
                .to_string();
            let url = video_segment
                .split("<a class=\"th js-open-popup\" href=\"")
                .collect::<Vec<&str>>()
                .get(1)
                .copied()
                .unwrap_or_default()
                .split("\"")
                .collect::<Vec<&str>>()
                .get(0)
                .copied()
                .unwrap_or_default()
                .to_string();
            // let preview = video_segment.split("<div class=\"img wrap_image\" data-preview=\"").collect::<Vec<&str>>().get(1).copied().unwrap_or_default()
            //     .split("\"")
            //     .collect::<Vec<&str>>().get(0).copied().unwrap_or_default()
            //     .to_string();

            let video_item = VideoItem::new(
                id,
                title,
                url.to_string(),
                "rule34gen".to_string(),
                thumb,
                duration,
            )
            .views(views)
            // .preview(preview)
            ;

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

#[async_trait]
impl Provider for Rule34genProvider {
    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![]
            }
        }
    }

    fn get_channel(&self, clientversion: ClientVersion) -> Option<crate::status::Channel> {
        Some(self.build_channel(clientversion))
    }
}
