/*
 * This file is part of modulo.
 *
 * Copyright (C) 2020-2021 Federico Terzi
 *
 * modulo is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * modulo is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with modulo.  If not, see <https://www.gnu.org/licenses/>.
 */

use std::ffi::c_void;
use std::os::raw::{c_char, c_int};

pub(crate) trait Interoperable {
  fn as_ptr(&self) -> *const c_void;
}

pub const FieldType_ROW: FieldType = 0;
pub const FieldType_LABEL: FieldType = 1;
pub const FieldType_TEXT: FieldType = 2;
pub const FieldType_CHOICE: FieldType = 3;
pub const FieldType_CHECKBOX: FieldType = 4;
pub type FieldType = i32;
#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct LabelMetadata {
  pub text: *const ::std::os::raw::c_char,
}
#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct TextMetadata {
  pub defaultText: *const ::std::os::raw::c_char,
  pub multiline: ::std::os::raw::c_int,
}

pub const ChoiceType_DROPDOWN: ChoiceType = 0;
pub const ChoiceType_LIST: ChoiceType = 1;
pub type ChoiceType = i32;
#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct ChoiceMetadata {
  pub values: *const *const ::std::os::raw::c_char,
  pub valueSize: ::std::os::raw::c_int,
  pub defaultValue: *const ::std::os::raw::c_char,
  pub choiceType: ChoiceType,
}

#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct FieldMetadata {
  pub id: *const ::std::os::raw::c_char,
  pub fieldType: FieldType,
  pub specific: *const ::std::os::raw::c_void,
}

#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct RowMetadata {
  pub fields: *const FieldMetadata,
  pub fieldSize: ::std::os::raw::c_int,
}

#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct FormMetadata {
  pub windowTitle: *const ::std::os::raw::c_char,
  pub iconPath: *const ::std::os::raw::c_char,
  pub fields: *const FieldMetadata,
  pub fieldSize: ::std::os::raw::c_int,
}

#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct ValuePair {
  pub id: *const ::std::os::raw::c_char,
  pub value: *const ::std::os::raw::c_char,
}

#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct SearchItem {
  pub id: *const ::std::os::raw::c_char,
  pub label: *const ::std::os::raw::c_char,
  pub trigger: *const ::std::os::raw::c_char,
}

#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct SearchResults {
  pub items: *const SearchItem,
  pub itemSize: ::std::os::raw::c_int,
}

#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct SearchMetadata {
  pub windowTitle: *const ::std::os::raw::c_char,
  pub iconPath: *const ::std::os::raw::c_char,
}

pub const WIZARD_MIGRATE_RESULT_SUCCESS: i32 = 0;
pub const WIZARD_MIGRATE_RESULT_CLEAN_FAILURE: i32 = 1;
pub const WIZARD_MIGRATE_RESULT_DIRTY_FAILURE: i32 = 2;
pub const WIZARD_MIGRATE_RESULT_UNKNOWN_FAILURE: i32 = 3;

#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct WizardMetadata {
  pub version: *const c_char,

  pub is_welcome_page_enabled: c_int,
  pub is_move_bundle_page_enabled: c_int,
  pub is_legacy_version_page_enabled: c_int,
  pub is_migrate_page_enabled: c_int,
  pub is_add_path_page_enabled: c_int,
  pub is_accessibility_page_enabled: c_int,

  pub window_icon_path: *const c_char,
  pub welcome_image_path: *const c_char,
  pub accessibility_image_1_path: *const c_char,
  pub accessibility_image_2_path: *const c_char,

  pub is_legacy_version_running: extern fn() -> c_int,
  pub backup_and_migrate: extern fn() -> c_int,
  pub add_to_path: extern fn() -> c_int,
  pub enable_accessibility: extern fn() -> c_int,
  pub is_accessibility_enabled: extern fn() -> c_int,
  pub on_completed: extern fn(),
}

#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct WelcomeMetadata {
  pub window_icon_path: *const c_char,
  pub tray_image_path: *const c_char,

  pub dont_show_again_changed: extern fn(c_int),
}

// Native bindings

#[allow(improper_ctypes)]
#[link(name = "espansomodulosys", kind = "static")]
extern "C" {
  // FORM
  pub(crate) fn interop_show_form(
    metadata: *const FormMetadata,
    callback: extern "C" fn(values: *const ValuePair, size: c_int, map: *mut c_void),
    map: *mut c_void,
  );

  // SEARCH
  pub(crate) fn interop_show_search(
    metadata: *const SearchMetadata,
    search_callback: extern "C" fn(query: *const c_char, app: *const c_void, data: *const c_void),
    items: *const c_void,
    result_callback: extern "C" fn(id: *const c_char, result: *mut c_void),
    result: *mut c_void,
  );

  pub(crate) fn update_items(app: *const c_void, items: *const SearchItem, itemCount: c_int);

  // WIZARD
  pub(crate) fn interop_show_wizard(metadata: *const WizardMetadata) -> c_int;

  // WELCOME
  pub(crate) fn interop_show_welcome(metadata: *const WelcomeMetadata);
}