use std::vec;
use std::env;
use error_chain::error_chain;
use htmlentity::entity::{decode, ICodedDataTrait};
use futures::future::join_all;
use wreq::Client;
use wreq::Proxy;
use wreq_util::Emulation;
use crate::db;
use crate::providers::Provider;
use crate::util::cache::VideoCache;
use crate::util::flaresolverr::{FlareSolverrRequest, Flaresolverr};
use crate::util::requester;
use crate::videos::ServerOptions;
use crate::videos::{VideoItem};
use crate::DbPool;
use crate::util::requester::Requester;

use base64::{engine::general_purpose, Engine as _};

/// Extracts digits from a string and sums them.
fn ssut51(arg: &str) -> u32 {
    arg.chars()
        .filter(|c| c.is_ascii_digit())
        .map(|c| c.to_digit(10).unwrap())
        .sum()
}

/// Encodes a token: "<sum1>-<host>-<sum2>" using Base64 URL-safe variant.
fn boo(sum1: u32, sum2: u32, host: &str) -> String {
    let raw = format!("{}-{}-{}", sum1, host, sum2);
    let encoded = general_purpose::STANDARD.encode(raw);

    // Replace + → -, / → _, = → .
    encoded
        .replace('+', "-")
        .replace('/', "_")
        .replace('=', ".")
}

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

#[derive(Debug, Clone)]
pub struct SxyprnProvider {
    url: String,
}
impl SxyprnProvider {
    pub fn new() -> Self {
        SxyprnProvider {
            url: "https://sxyprn.com".to_string()
        }
    }
    async fn get(&self, cache:VideoCache, pool:DbPool, page: u8, sort: String, options: ServerOptions) -> Result<Vec<VideoItem>> {

        // Extract needed fields from options at the start
        let language = options.language.clone().unwrap();
        let filter = options.filter.clone().unwrap();
        let mut requester = options.requester.clone().unwrap();

        let url_str = format!("{}/blog/all/{}.html", self.url, ((page as u32)-1)*20);
        
        let old_items = match cache.get(&url_str) {
            Some((time, items)) => {
                if time.elapsed().unwrap_or_default().as_secs() < 60 * 60 {
                    return Ok(items.clone());
                }
                else{
                    items.clone()
                }
            }
            None => {
                vec![]
            }
        };

        let text = requester.get(&url_str).await.unwrap();
        // Pass a reference to options if needed, or reconstruct as needed
        let video_items: Vec<VideoItem> = self.get_video_items_from_html(text.clone(), pool, requester).await;
        if !video_items.is_empty() {
            cache.remove(&url_str);
            cache.insert(url_str.clone(), video_items.clone());
        } else{
            return Ok(old_items);
        }
        Ok(video_items)
    }

    async fn query(&self, cache: VideoCache, pool:DbPool, page: u8, query: &str, sort: String, options: ServerOptions) -> Result<Vec<VideoItem>> {
        // Extract needed fields from options at the start
        let language = options.language.clone().unwrap();
        let filter = options.filter.clone().unwrap();
        let mut requester = options.requester.clone().unwrap();
        let search_string = query.replace(" ", "%20");
        let url_str = format!(
            "{}/{}/search/{}?page={}&sort={}",
            self.url, language, search_string, page, sort
        );
        // Check our Video Cache. If the result is younger than 1 hour, we return it.
        let old_items = match cache.get(&url_str) {
            Some((time, items)) => {
                if time.elapsed().unwrap_or_default().as_secs() < 60 * 60 {
                    return Ok(items.clone());
                }
                else{
                    let _ = cache.check().await;
                    return Ok(items.clone())
                }
            }
            None => {
                vec![]
            }
        };    
        let text = requester.get(&url_str).await.unwrap();
        let video_items: Vec<VideoItem> = self.get_video_items_from_html(text.clone(), pool, requester).await;
        if !video_items.is_empty() {
            cache.remove(&url_str);
            cache.insert(url_str.clone(), video_items.clone());
        } else{
            return Ok(old_items);
        }
        Ok(video_items)
    }

    async fn get_video_items_from_html(&self, html: String, pool: DbPool, requester: Requester) -> Vec<VideoItem> {
        if html.is_empty() {
            println!("HTML is empty");
            return vec![];
        }
        let raw_videos = html
            .split("post_el_small'")
            .collect::<Vec<&str>>()[1..]
            .to_vec();
        let mut urls: Vec<String> = 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.to_string().trim());
            }
           
            let url_str = video_segment.split("data-url='").collect::<Vec<&str>>()[1]
                .split("'")
                .collect::<Vec<&str>>()[0]
                .to_string();
            urls.push(url_str.clone());
            break;
            
        }
        let futures = urls.into_iter().map(|el| self.get_video_item(el.clone(), pool.clone(), requester.clone()));
        let results: Vec<Result<VideoItem>> = join_all(futures).await;
        let video_items: Vec<VideoItem> = results
            .into_iter()
            .filter_map(Result::ok)
            .collect();   

        return video_items;
    }

    async fn get_video_item(&self, url_str: String, pool: DbPool, mut requester: Requester) -> Result<VideoItem> {
        let mut conn = pool.get().expect("couldn't get db connection from pool");
        let db_result = db::get_video(&mut conn,url_str.clone());
        match db_result {
            Ok(Some(entry)) => {
                let video_item: VideoItem = serde_json::from_str(entry.as_str()).unwrap();
                return Ok(video_item)
            }
            Ok(None) => {
            }
            Err(e) => {
                println!("Error fetching video from database: {}", e);
            }
        }
        drop(conn);
        let vid = requester.get(&url_str).await.unwrap().to_string();
        let mut title = vid.split("<title>").collect::<Vec<&str>>()[1]
            .split(" #")
            .collect::<Vec<&str>>()[0].trim()
            .to_string();
        title = decode(title.as_bytes()).to_string().unwrap_or(title);
        let thumb = format!("https:{}", vid.split("<meta property='og:image' content='").collect::<Vec<&str>>()[1]
            .split("\"")
            .collect::<Vec<&str>>()[0]
            .to_string());

        let raw_duration = vid.split("duration:<b>").collect::<Vec<&str>>()[1]
            .split("</b>")
            .collect::<Vec<&str>>()[0]
            .to_string();
        let duration = raw_duration.parse::<u32>().unwrap_or(0);

        let id = url_str.split("/").collect::<Vec<&str>>().last().unwrap().replace(".html", "")
            .to_string();
        let mut tags = vec![];
        if vid.split("splitter_block_header").collect::<Vec<&str>>()[0].contains("hash_link"){
            for tag_snippet in vid.split("splitter_block_header").collect::<Vec<&str>>()[0].split("hash_link").collect::<Vec<&str>>()[1..].to_vec(){
                let tag = tag_snippet.split("<").collect::<Vec<&str>>()[0].trim()
                    .to_string();
                if !tag.is_empty(){
                    tags.push(tag.replace("#", ""));
                }
            }
        }
        let video_url_pre_str = vid.split("data-vnfo").collect::<Vec<&str>>()[1]
        .split("\":\"").collect::<Vec<&str>>()[1]
            .split("\"").collect::<Vec<&str>>()[0]
            .replace("\\", "")
            .to_string();
        println!("Video URL pre str: {}", video_url_pre_str);
        let video_request = requester.get(&url_str).await.unwrap();
        let mut video_url_parts = vid.split("m3u8").collect::<Vec<&str>>()[1]
            .split("https").collect::<Vec<&str>>()[0]
            .split("|").collect::<Vec<&str>>();
        video_url_parts.reverse();  
        let video_url = format!("https://{}.{}/{}-{}-{}-{}-{}/playlist.m3u8", 
                                        video_url_parts[1],
                                        video_url_parts[2],
                                        video_url_parts[3],
                                        video_url_parts[4],
                                        video_url_parts[5],
                                        video_url_parts[6],
                                        video_url_parts[7]
                                    );
        let video_item = VideoItem::new(
            id,
            title,
            video_url.clone(),
            "sxyprn".to_string(),
            thumb,
            duration,
        )
        .tags(tags)
        ;

        let mut conn = pool.get().expect("couldn't get db connection from pool");
        let insert_result = db::insert_video(&mut conn, &url_str, &serde_json::to_string(&video_item)?);
        match insert_result{
            Ok(_) => (),
            Err(e) => {println!("{:?}", e); }
        }
        drop(conn);

        return Ok(video_item);
    }
}

impl Provider for SxyprnProvider {
    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 videos: std::result::Result<Vec<VideoItem>, Error> = match query {
            Some(q) => self.query(cache, pool, page.parse::<u8>().unwrap_or(1), &q, sort, options).await,
            None => self.get(cache, pool, page.parse::<u8>().unwrap_or(1), sort, options).await,
        };
        match videos {
            Ok(v) => v,
            Err(e) => {
                println!("Error fetching videos: {}", e);
                vec![]
            }
        }
    }
}