use crate::DbPool;
use crate::api::ClientVersion;
use crate::providers::Provider;
use crate::status::*;
use crate::util::cache::VideoCache;
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 PmvhavenProvider {
    url: String,
    stars: Arc<RwLock<Vec<String>>>,
    categories: Arc<RwLock<Vec<String>>>,
}
impl PmvhavenProvider {
    pub fn new() -> Self {
        let provider = PmvhavenProvider {
            url: "https://pmvhaven.com".to_string(),
            stars: Arc::new(RwLock::new(vec![])),
            categories: Arc::new(RwLock::new(vec![])),
        };
        provider
    }

    fn build_channel(&self, clientversion: ClientVersion) -> Channel {
        // if clientversion >= ClientVersion::new(22, 101, "22e".to_string()) {
        let _ = clientversion;
        Channel {
            id: "pmvhaven".to_string(),
            name: "PMVHaven".to_string(),
            description: "Best PMV Videos".to_string(),
            premium: false,
            favicon: "https://www.google.com/s2/favicons?sz=64&domain=pmvhaven.com".to_string(),
            status: "active".to_string(),
            categories: self.categories.read().unwrap().iter().map(|c| c.clone()).collect(),
            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: "relevance".into(),
                            title: "Relevance".into(),
                        },
                        FilterOption {
                            id: "newest".into(),
                            title: "Newest".into(),
                        },
                        FilterOption {
                            id: "oldest".into(),
                            title: "Oldest".into(),
                        },
                        FilterOption {
                            id: "most viewed".into(),
                            title: "Most Viewed".into(),
                        },
                        FilterOption {
                            id: "most liked".into(),
                            title: "Most Liked".into(),
                        },
                        FilterOption {
                            id: "most disliked".into(),
                            title: "Most Disliked".into(),
                        },
                    ],
                    multiSelect: false,
                },
                ChannelOption {
                    id: "duration".to_string(),
                    title: "Duration".to_string(),
                    description: "Length of the Videos".to_string(),
                    systemImage: "timer".to_string(),
                    colorName: "green".to_string(),
                    options: vec![
                        FilterOption {
                            id: "any".into(),
                            title: "Any".into(),
                        },
                        FilterOption {
                            id: "<4 min".into(),
                            title: "<4 min".into(),
                        },
                        FilterOption {
                            id: "4-20 min".into(),
                            title: "4-20 min".into(),
                        },
                        FilterOption {
                            id: "20-60 min".into(),
                            title: "20-60 min".into(),
                        },
                        FilterOption {
                            id: ">1 hour".into(),
                            title: ">1 hour".into(),
                        },
                    ],
                    multiSelect: false,
                },
            ],
            nsfw: true,
            cacheDuration: None,
        }
    }

    // Push one item with minimal lock time and dedup by id
    fn push_unique(target: &Arc<RwLock<Vec<String>>>, item: String) {
        if let Ok(mut vec) = target.write() {
            if !vec.iter().any(|x| x == &item) {
                vec.push(item);
            }
        }
    }

    async fn query(
        &self,
        cache: VideoCache,
        page: u8,
        query: &str,
        options: ServerOptions,
    ) -> Result<Vec<VideoItem>> {
        let search_string = query.trim().to_string();
        let sort_string = match options.sort.unwrap_or("".to_string()).as_str() {
            "newest" => "sort=-uploadDate",
            "oldest" => "sort=uploadDate",
            "most viewed" => "sort=-views",
            "most liked" => "sort=-likes",
            "most disliked" => "sort=-dislikes",
            _ => "",
        };
        let duration_string = match options.duration.unwrap_or("".to_string()).as_str(){
            "<4 min" => "durationMax=240",
            "4-20 min" => "durationMin=240&durationMax=1200",
            "20-60 min" => "durationMin=1200&durationMax=3600",
            ">1 hour" => "durationMin=3600",
            _ => "",
        };
        let endpoint = if search_string.is_empty() {
            "api/videos"
        } else {
            "api/videos/search"
        };
        let mut video_url = format!("{}/{}?limit=100&page={}&{}&{}", self.url, endpoint, page, duration_string, sort_string);
        if let Some(star) = self.stars.read().unwrap().iter().find(|s| s.to_ascii_lowercase() == search_string.to_ascii_lowercase()) {
            video_url = format!("{}&stars={}", video_url, star);
        } else if let Some(category) = self.categories.read().unwrap().iter().find(|s| s.to_ascii_lowercase() == search_string.to_ascii_lowercase()) {
            video_url = format!("{}&tagMode=AND&tags={}", video_url, category);
        } 
        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).await.unwrap();
        let json = serde_json::from_str::<serde_json::Value>(&text).unwrap_or(serde_json::Value::Null);
        let video_items: Vec<VideoItem> = self
            .get_video_items_from_json(json)
            .await;
        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 get_video_items_from_json(
        &self,
        json: serde_json::Value,
    ) -> Vec<VideoItem> {
        if json.is_null() {
            return vec![];
        }
        let mut items = vec![];
        let success = json["success"].as_bool().unwrap_or(false);
        if !success {
            return items;
        }
        let videos = json["data"].as_array().cloned().unwrap_or_default();
        if videos.is_empty() {
            return items;
        }
        for video in videos.clone() {
            let title = decode(video["title"].as_str().unwrap_or("").as_bytes()).to_string().unwrap_or("".to_string());
            let id = video["_id"].as_str().unwrap_or(title.clone().as_str()).to_string();
            let video_url = video["videoUrl"].as_str().unwrap_or("").to_string();
            let views = video["views"].as_u64().unwrap_or(0);
            let thumb = video["thumbnailUrl"].as_str().unwrap_or("").to_string();
            let duration_str = video["duration"].as_str().unwrap_or("0");
            let duration = parse_time_to_seconds(duration_str).unwrap_or(0);
            let preview = video["previewUrl"].as_str().unwrap_or("").to_string();
            let tags_array = video["tags"].as_array().cloned().unwrap_or_default();
            for tag in tags_array.clone() {
                let tag_str = decode(tag.as_str().unwrap_or("").as_bytes()).to_string().unwrap_or("".to_string());
                Self::push_unique(&self.categories, tag_str.clone());
            }
            let stars_array = video["starsTags"].as_array().cloned().unwrap_or_default();
            for tag in stars_array.clone() {
                let tag_str = decode(tag.as_str().unwrap_or("").as_bytes()).to_string().unwrap_or("".to_string());
                Self::push_unique(&self.stars, tag_str.clone());
            }

            let tags = stars_array.iter().chain(tags_array.iter()).cloned().collect::<Vec<_>>();
            let video_item = VideoItem::new(
                id,
                title,
                video_url.replace(" ", "%20").to_string(),
                "pmvhaven".to_string(),
                thumb,
                duration as u32,
            )
            .views(views as u32)
            .preview(preview)
            .tags(tags.iter().map(|t| decode(t.as_str().unwrap_or("").as_bytes()).to_string().unwrap_or("".to_string())).collect());
            items.push(video_item);
        }


        return items;
    }   
}

#[async_trait]
impl Provider for PmvhavenProvider {
    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> = self.query(cache, page.parse::<u8>().unwrap_or(1), query.unwrap_or("".to_string()).as_str(), options)
                    .await;
        match videos {
            Ok(v) => v,
            Err(e) => {
                println!("Error fetching videos: {}", e);
                vec![]
            }
        }
    }
    fn get_channel(&self, clientversion: ClientVersion) -> crate::status::Channel {
        self.build_channel(clientversion)
    }
}