use crate::avm1::fscommand;
use crate::avm1::{ActionContext, Avm1, Object, Value};
use crate::backend::navigator::NavigationMethod;
use gc_arena::{GcCell, MutationContext};
use rand::Rng;

mod math;

#[allow(non_snake_case, unused_must_use)] //can't use errors yet
pub fn getURL<'a, 'gc>(
    avm: &mut Avm1<'gc>,
    context: &mut ActionContext<'a, 'gc, '_>,
    _this: GcCell<'gc, Object<'gc>>,
    args: &[Value<'gc>],
) -> Value<'gc> {
    //TODO: Error behavior if no arguments are present
    if let Some(url_val) = args.get(0) {
        let url = url_val.clone().into_string();
        if let Some(fscommand) = fscommand::parse(&url) {
            fscommand::handle(fscommand, avm, context);
            return Value::Undefined;
        }

        let window = args.get(1).map(|v| v.clone().into_string());
        let method = match args.get(2) {
            Some(Value::String(s)) if s == "GET" => Some(NavigationMethod::GET),
            Some(Value::String(s)) if s == "POST" => Some(NavigationMethod::POST),
            _ => None,
        };
        let vars_method = method.map(|m| (m, avm.locals_into_form_values()));

        context.navigator.navigate_to_url(url, window, vars_method);
    }

    Value::Undefined
}

pub fn random<'gc>(
    _avm: &mut Avm1<'gc>,
    action_context: &mut ActionContext<'_, 'gc, '_>,
    _this: GcCell<'gc, Object<'gc>>,
    args: &[Value<'gc>],
) -> Value<'gc> {
    match args.get(0) {
        Some(Value::Number(max)) => {
            Value::Number(action_context.rng.gen_range(0.0f64, max).floor())
        }
        _ => Value::Undefined, //TODO: Shouldn't this be an error condition?
    }
}

pub fn create_globals<'gc>(gc_context: MutationContext<'gc, '_>) -> Object<'gc> {
    let mut globals = Object::object(gc_context);

    globals.force_set("Math", Value::Object(math::create(gc_context)));
    globals.force_set_function("getURL", getURL, gc_context);
    globals.force_set_function("random", random, gc_context);
    globals.force_set("NaN", Value::Number(std::f64::NAN));
    globals.force_set("Infinity", Value::Number(std::f64::INFINITY));

    globals
}