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extern crate serde;
extern crate serde_json;
extern crate reqwest;

use hyper::Client as HttpClient;
use hyper::header::{Headers, Authorization, Bearer, ContentType};
use hyper::mime::{Mime, TopLevel, SubLevel, Attr, Value};
use hyper::net::HttpsConnector;
use hyper_native_tls::NativeTlsClient;

use std::io::Read;
use std::collections::HashMap;
use std::iter::IntoIterator;

pub struct Client {
    client: HttpClient,
    secret_key: String
}

impl Client {

    pub fn new(secret_key: &str) -> Client {
        let ssl = NativeTlsClient::new().unwrap();
        let connector = HttpsConnector::new(ssl);
        let client = HttpClient::with_connector(connector);
        return Client{client: client, secret_key: secret_key.to_owned()};
    }

    pub fn get_headers(&self) -> Headers {
        let mut headers = Headers::new();
        headers.set(
           Authorization(
               Bearer {
                   token: self.secret_key.to_owned()
               }
           )
        );
        headers.set(
            ContentType(
                Mime(
                    TopLevel::Application,
                    SubLevel::Json,
                    vec![(Attr::Charset, Value::Utf8)]
                )
            )
        );
        return headers;
    }

    pub fn get(&self, path: &str) -> String {
        let mut body_response = String::new();
        let url = get_url(path);
        self.client.get(&url)
                .headers(self.get_headers())
                .send()
                .unwrap()
                .read_to_string(&mut body_response)
                .unwrap();
        return body_response;
    }

    pub fn get_filter(&self,
        path: &str,
        query_params: Option<HashMap<String, String>>,
        limit: Option<String>,
        before: Option<String>,
        after: Option<String>
    ) -> String {
        let mut query_url = String::from(path);
        query_url.push_str("?limit");
        if limit.is_none() {
            query_url.push_str("=50");
        } else {
            query_url.push_str(&format!("={:?}", limit));
        }
        if !query_params.is_none() {
            for (k, v) in query_params.into_iter().flat_map(IntoIterator::into_iter) {
                query_url.push_str(&format!("&{:?}", k));
                query_url.push_str(&format!("={:?}", v));
            }
        }
        if !before.is_none() {
            query_url.push_str("&before");
            query_url.push_str(&format!("={:?}", before));
        }
        if !after.is_none() {
            query_url.push_str("&after");
            query_url.push_str(&format!("={:?}", after));
        }
        let mut body_response = String::new();
        let url = get_url(&query_url);
        self.client.get(&url)
                .headers(self.get_headers())
                .send()
                .unwrap()
                .read_to_string(&mut body_response)
                .unwrap();
        return body_response;
    }

    pub fn post(&self, path: &str, map: &HashMap<String, serde_json::Value>) -> String {
        let mut body_response = String::new();
        let url = get_url(path);
        let client_reqwest = reqwest::Client::new().unwrap();
        client_reqwest.post(&url)
                .headers(self.get_headers())
                .json(&map)
                .send()
                .unwrap()
                .read_to_string(&mut body_response)
                .unwrap();
        return body_response;
    }

    pub fn delete(&self, path: &str) -> String {
        let mut body_response = String::new();
        let url = get_url(path);
        self.client.delete(&url)
                .headers(self.get_headers())
                .send()
                .unwrap()
                .read_to_string(&mut body_response)
                .unwrap();
        return body_response;
    }

    pub fn patch(&self) {
    }

    pub fn capture(&self, path: &str) -> String {
        let mut body_response = String::new();
        let url = get_url(path);
        self.client.post(&url)
                .headers(self.get_headers())
                .send()
                .unwrap()
                .read_to_string(&mut body_response)
                .unwrap();
        return body_response;
    }

}

fn get_url(path: &str) -> String {
    String::from("https://api.culqi.com/v2") + path
}