use crate::err::Error;
use reqwest::blocking::Client;
use reqwest::blocking::Response;
use reqwest::header::CONTENT_TYPE;
use rustyline::error::ReadlineError;
use rustyline::Editor;
use serde_json::Value;

pub fn init(matches: &clap::ArgMatches) -> Result<(), Error> {
	// Set the default logging level
	crate::cli::log::init(3);
	// Parse all other cli arguments
	let user = matches.value_of("user").unwrap();
	let pass = matches.value_of("pass").unwrap();
	let conn = matches.value_of("conn").unwrap();
	let ns = matches.value_of("ns").unwrap();
	let db = matches.value_of("db").unwrap();
	// If we should pretty-print responses
	let pretty = matches.is_present("pretty");
	// Set the correct import URL
	let conn = format!("{}/sql", conn);
	// Create a new terminal REPL
	let mut rl = Editor::<()>::new().unwrap();
	// Load the command-line history
	let _ = rl.load_history("history.txt");
	// Loop over each command-line input
	loop {
		// Prompt the user to input SQL
		let readline = rl.readline("> ");
		// Check the user input
		match readline {
			// The user typed a query
			Ok(line) => {
				// Add the entry to the history
				rl.add_history_entry(line.as_str());
				// Make a new remote request
				let res = Client::new()
					.post(&conn)
					.header(CONTENT_TYPE, "application/json")
					.basic_auth(user, Some(pass))
					.header("NS", ns)
					.header("DB", db)
					.body(line)
					.send();
				// Get the request response
				match process(pretty, res) {
					Ok(v) => println!("{}", v),
					Err(e) => eprintln!("{}", e),
				}
			}
			// The user types CTRL-C
			Err(ReadlineError::Interrupted) => {
				break;
			}
			// The user typed CTRL-D
			Err(ReadlineError::Eof) => {
				break;
			}
			// There was en error
			Err(err) => {
				eprintln!("Error: {:?}", err);
				break;
			}
		}
	}
	// Save the inputs to the history
	let _ = rl.save_history("history.txt");
	// Everything OK
	Ok(())
}

fn process(pretty: bool, res: reqwest::Result<Response>) -> Result<String, Error> {
	// Catch any errors
	let res = res?;
	// Process the TEXT response
	let res = res.text()?;
	// Check if we should prettify
	match pretty {
		// Don't prettify the response
		false => Ok(res),
		// Yes prettify the response
		true => {
			// Parse the JSON response
			let res: Value = serde_json::from_str(&res)?;
			// Pretty the JSON response
			let res = serde_json::to_string_pretty(&res)?;
			// Everything processed OK
			Ok(res)
		}
	}
}