#[macro_use]
extern crate bitflags;

use std::os::raw::*;

pub enum CWebView {} // opaque type, only used in ffi pointers

type ErasedExternalInvokeFn = extern "system" fn(webview: *mut CWebView, arg: *const c_char);
type ErasedDispatchFn = extern "system" fn(webview: *mut CWebView, arg: *mut c_void);

#[repr(C)]
pub enum DialogType {
	Open = 0,
	Save = 1,
	Alert = 2,
}

bitflags! {
	#[repr(C)]
	pub struct DialogFlags: u32 {
		const FILE      = 0b0000;
		const DIRECTORY = 0b0001;
		const INFO      = 0b0010;
		const WARNING   = 0b0100;
		const ERROR     = 0b0110;
	}
}

extern "C" {
	pub fn wrapper_webview_free(this: *mut CWebView);
	pub fn wrapper_webview_new(
		title: *const c_char,
		url: *const c_char,
		width: c_int,
		height: c_int,
		resizable: c_int,
		show_maximised: c_int,
		debug: c_int,
		external_invoke_cb: Option<ErasedExternalInvokeFn>,
		userdata: *mut c_void,
	) -> *mut CWebView;
	pub fn webview_loop(this: *mut CWebView, blocking: c_int) -> c_int;
	pub fn webview_terminate(this: *mut CWebView);
	pub fn webview_exit(this: *mut CWebView);
	pub fn wrapper_webview_get_userdata(this: *mut CWebView) -> *mut c_void;
	pub fn webview_dispatch(this: *mut CWebView, f: Option<ErasedDispatchFn>, arg: *mut c_void);
	pub fn webview_eval(this: *mut CWebView, js: *const c_char) -> c_int;
	pub fn webview_inject_css(this: *mut CWebView, css: *const c_char) -> c_int;
	pub fn webview_set_fullscreen(this: *mut CWebView, fullscreen: c_int);
	pub fn webview_dialog(
		this: *mut CWebView,
		dialog_type: DialogType,
		flags: DialogFlags,
		title: *const c_char,
		arg: *const c_char,
		result: *mut c_char,
		result_size: usize,
	);
	pub fn wrapper_webview_get_height(this: *mut CWebView) -> c_int;
	pub fn wrapper_webview_get_width(this: *mut CWebView) -> c_int;
	pub fn wrapper_webview_get_top(this: *mut CWebView) -> c_int;
	pub fn wrapper_webview_get_left(this: *mut CWebView) -> c_int;
}