use std::env;
use std::fs::File;
use std::io::Read;

extern crate tenquestionmarks;
use tenquestionmarks::Tenquestionmarks;

extern crate toml;
use toml::Parser;

fn main () {
    let configFileName = env::args().nth(1).unwrap_or("tenquestionmarks.toml".into());
    match File::open(&configFileName) {
        Ok(mut file) => {
            let mut contents = String::new();
            match file.read_to_string(&mut contents) {
                Ok(value) => {
                    let mut parser = Parser::new(&contents);
                    match parser.parse() {
                        Some(configuration) => {
                            println!("Loaded configuration from: {}", configFileName);
                            match Tenquestionmarks::from_configuration(configuration) {
                                Ok(tqm) => {
                                    println!("tenquestionmarks initialized successfully");
                                    tqm.run();
                                },
                                Err(e) => println!("Failed to initialize tenquestionmarks: {:?}", e)
                            }
                        },
                        None => {
                            println!("Failed to parse config file {}: {:?}. Config file must be a valid TOML file.", configFileName, parser.errors);
                        }
                    }
                },
                Err(e) => {
                    println!("Failed to open config file {}: {:?}", configFileName, e);
                }
            }
        },
        Err(e) => {
            println!("Failed to open config file! Please specify path to a config file.");
        }
    }
}