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extern crate reqwest;

#[macro_use]
extern crate serde_json;
use serde_json::{Value, Error};

#[derive(Debug)]
pub struct CacheInterface {
	url: String
}

impl CacheInterface {
    pub fn new(url: String) -> Self {
    	CacheInterface {
    		url: url
    	}
    }

    pub fn get_artist(&self, artist_id: u32)-> Option<Value> {
    	let params: &[(&str, &str)] = &[
			("type", "artist"),
			("id", &format!("{}", artist_id)),
		];
    	let result = self.get(params);
    	if let Some(serde_json::Value::Null) = result {
    		None
    	} else {
    		result
    	}
    }

    pub fn set_artist(&self, data: Value) {
    	let post: &[(&str, &str)] = &[
			("type", "artist"),
			("data", &data.to_string()),
		];
    	let r = self.post(post).unwrap();
    	println!("{}", r);
    }

    pub fn get_album(&self, album_id: u32)-> Option<Value> {
    	let params: &[(&str, &str)] = &[
			("type", "album"),
			("id", &format!("{}", album_id)),
		];
    	let result = self.get(params);
    	if let Some(serde_json::Value::Null) = result {
    		None
    	} else {
    		result
    	}
    }

    pub fn set_album(&self, data: Value) {
    	let post: &[(&str, &str)] = &[
			("type", "album"),
			("data", &data.to_string()),
		];
    	let r = self.post(post).unwrap();
    	println!("{}", r);
    }

    pub fn get_album_tracks(&self, album_id: u32)-> Option<Value> {
    	let params: &[(&str, &str)] = &[
			("type", "tracks"),
			("id", &format!("{}", album_id)),
		];
    	let result = self.get(params);
    	if let Some(serde_json::Value::Null) = result {
    		None
    	} else {
    		result
    	}
    }

    pub fn set_album_tracks(&self, data: Value) {
    	let post: &[(&str, &str)] = &[
			("type", "tracks"),
			("data", &data.to_string()),
		];
    	let r = self.post(post).unwrap();
    	println!("{}", r);
    }

    pub fn get_track(&self, track_id: u32)-> Option<Value> {
    	let params: &[(&str, &str)] = &[
			("type", "track"),
			("id", &format!("{}", track_id)),
		];
    	let result = self.get(params);
    	//println!("Result: {:?}", result);
    	if let Some(serde_json::Value::Null) = result {
    		None
    	} else {
    		result
    	}
    }

    pub fn set_track(&self, data: Value) {
    	let post: &[(&str, &str)] = &[
			("type", "track"),
			("data", &data.to_string()),
		];
    	let r = self.post(post).unwrap();
    	println!("{}", r);
    }

    fn get(&self, params: &[(&str, &str)]) -> Option<Value>{
    	let client = reqwest::Client::new();
    	let mut rb = client.get(self.url.as_str());
    	let rb = rb.query(params);

    	let mut result: Option<Value> = None;

    	'main: for _i in 0..1 {
			match rb.send() {
				Ok(mut response) => {
					match response.text() {
						Ok(text) => {
							//println!("Text: {:?}", text);
							if let Ok(jr) = serde_json::from_str(&text) {
								result = Some(jr);
							}
							//result = serde_json::from_str(&text);
						}
						Err(_) => {
							//println!("Request failed.");
						}
					}
					break 'main;
				}
				Err(_) => {
					//println!("Request failed.");
				}
			}
		}

    	result
    }

    fn post(&self, post: &[(&str, &str)]) -> Option<String> {
		let client = reqwest::Client::new();

		let mut rb = client.post(self.url.as_str());

		let rb = rb.form(&post);

		'main: for _i in 0..1 {
			match rb.send() {
				Ok(mut response) => {
					match response.text() {
						Ok(text) => {
							return Some(text);
						}
						Err(_) => {
							//println!("Request failed.");
						}
					}
					break 'main;
				}
				Err(_) => {
					//println!("Request failed.");
				}
			}
		}
		None
	}
}