use dotenvy::dotenv;
use std::env;
use xml_builder::{XMLBuilder, XMLElement, XMLVersion};
use super::database as db;
use super::database::{DidTargetType, Did};

pub fn url(did: Did) -> XMLElement {
    let mut work = XMLElement::new("work");
    let mut bridge = XMLElement::new("execute");
    let target = did.target.unwrap();

    bridge.add_attribute("application", "bridge");
    bridge.add_attribute("data", format!("sofia/external/{}", target).as_str());

    work.add_child(bridge).unwrap();

    work
}

pub fn moh(_did: Did) -> XMLElement {
    let mut work = XMLElement::new("work");

    let mut playback = XMLElement::new("playback");
    playback.add_attribute("file", "local_stream://default");
    work.add_child(playback).unwrap();

    work
}

pub fn external_number(_did: Did) -> XMLElement {
    let work = XMLElement::new("work");
    work
}

pub fn no_service(_did: Did) -> XMLElement {
    dotenv().ok();
    let sound_path = env::var("SOUND_PATH").expect("SOUND_PATH must be set");
    let no_service_path = format!("{}/no_service.wav", sound_path);
    let mut work = XMLElement::new("work");

    add_playback(&mut work, &no_service_path);

    work
}

pub fn night_mode(_did: Did) -> XMLElement {
    dotenv().ok();
    let sound_path = env::var("SOUND_PATH").expect("SOUND_PATH must be set");
    let night_mode_path = format!("{}/night_mode.wav", sound_path);

    let mut work = XMLElement::new("work");

    add_playback(&mut work, &night_mode_path);

    work
}

pub fn custom_message(_did: Did) -> XMLElement {
    let work = XMLElement::new("work");
    work
}

pub fn add_playback(work: &mut XMLElement ,file_path: &str) {
    let mut answer = XMLElement::new("execute");
    answer.add_attribute("application", "answer");
    work.add_child(answer).unwrap();

    let mut playback = XMLElement::new("playback");
    playback.add_attribute("file", &file_path);
    work.add_child(playback).unwrap();
}

pub fn route_call(did: String) -> Vec<u8> {
    let d = db::get_did_by(&did).unwrap();
    let mut xml = XMLBuilder::new()
        .version(XMLVersion::XML1_1)
        .encoding("UTF-8".into())
        .build();

    let mut doc = XMLElement::new("document");
    doc.add_attribute("type", "xml/freeswitch-httapi");

    let params = XMLElement::new("params");
    let mut work = match d.target_type {
        DidTargetType::Url => {
            url(d)
        },
        DidTargetType::Moh => {
            moh(d)
        },
        DidTargetType::ExternalNumber => {
            external_number(d)
        },
        DidTargetType::NoService => {
            no_service(d)
        },
        DidTargetType::NightMode => {
            night_mode(d)
        },
        DidTargetType::CustomMessage => {
            custom_message(d)
        }
    };

    let mut hangup = XMLElement::new("execute");
    hangup.add_attribute("application", "hangup");
    work.add_child(hangup).unwrap();

    doc.add_child(params).unwrap();
    doc.add_child(work).unwrap();

    xml.set_root_element(doc);

    let mut writer: Vec<u8> = Vec::new();
    xml.generate(&mut writer).unwrap();

    writer

}