use std::fs::File;
use std::io::BufReader;

use serde_json::Value;
use xml::reader::{EventReader, XmlEvent};

#[derive(Serialize)]
pub struct ParserResult {
    pub context: Value,
    pub external_id: String,
    pub meeting_id: String,
    pub meeting_name: String,
    pub meeting_url: String,
}

pub fn parser(content: BufReader<File>) -> ParserResult {
    let mut data = ParserResult {
        context: serde_json::from_str("{}").unwrap(),
        external_id: "".to_string(),
        meeting_id: "".to_string(),
        meeting_name: "".to_string(),
        meeting_url: "".to_string(),
    };

    for element in EventReader::new(content) {
        match element {
            Ok(XmlEvent::StartElement {
                name, attributes, ..
            }) => {
                let el_name = name.local_name.to_string();

                for attribute in attributes {
                    let attr_name: String = attribute.name.local_name.to_string();
                    let attr_value: String = attribute.value.to_string();

                    if el_name == "metadata" && attr_name == "bn-recording-status" {
                        data.context = serde_json::from_str(&attr_value).unwrap();
                    }

                    if el_name == "metadata" && attr_name == "meetingId" {
                        data.external_id = attr_value.clone();
                    }

                    if el_name == "recording" && attr_name == "meeting_id" {
                        data.meeting_id = attr_value.clone();
                        data.meeting_url = format!("{}{}", "https://bbb.styleschool.ru/playback/presentation/0.9.0/playback.html?meetingId=", attr_value);
                    }

                    if el_name == "metadata" && attr_name == "meetingName" {
                        data.meeting_name = attr_value.clone();
                    }
                }
            }
            Err(error) => panic!(error),
            _ => {}
        }
    }

    return data;
}