// Copyright 2024 The Grim Developers
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use egui::{Id, RichText};
use grin_util::ZeroingString;

use crate::gui::Colors;
use crate::gui::platform::PlatformCallbacks;
use crate::gui::views::{Modal, TextEdit, View};

/// Wallet opening [`Modal`] content.
pub struct OpenWalletModal {
    /// Password to open wallet.
    pass_edit: String,
    /// Flag to check if wrong password was entered.
    wrong_pass: bool,
}

impl OpenWalletModal {
    /// Create new content instance.
    pub fn new() -> Self {
        Self {
            pass_edit: "".to_string(),
            wrong_pass: false,
        }
    }
    /// Draw [`Modal`] content.
    pub fn ui(&mut self,
              ui: &mut egui::Ui,
              modal: &Modal,
              cb: &dyn PlatformCallbacks,
              mut on_continue: impl FnMut(ZeroingString) -> bool) {
        // Callback for button to continue.
        let mut on_continue = |m: &mut OpenWalletModal| {
            let pass = m.pass_edit.clone();
            if pass.is_empty() {
                return;
            }
            m.wrong_pass = !on_continue(ZeroingString::from(pass));
            if !m.wrong_pass {
                m.pass_edit = "".to_string();
                Modal::close();
            }
        };

        ui.vertical_centered(|ui| {
            ui.add_space(6.0);
            ui.label(RichText::new(t!("wallets.pass"))
                .size(17.0)
                .color(Colors::gray()));
            ui.add_space(8.0);

            // Show password input.
            let mut pass_edit = TextEdit::new(Id::from(modal.id).with("pass_edit")).password();
            pass_edit.ui(ui, &mut self.pass_edit, cb);
            if pass_edit.enter_pressed {
                (on_continue)(self);
            }

            // Show information when password is empty.
            if self.pass_edit.is_empty() {
                self.wrong_pass = false;
                ui.add_space(10.0);
                ui.label(RichText::new(t!("wallets.pass_empty"))
                    .size(17.0)
                    .color(Colors::inactive_text()));
            } else if self.wrong_pass {
                ui.add_space(10.0);
                ui.label(RichText::new(t!("wallets.wrong_pass"))
                    .size(17.0)
                    .color(Colors::red()));
            }
            ui.add_space(12.0);
        });

        // Show modal buttons.
        ui.scope(|ui| {
            // Setup spacing between buttons.
            ui.spacing_mut().item_spacing = egui::Vec2::new(8.0, 0.0);

            ui.columns(2, |columns| {
                columns[0].vertical_centered_justified(|ui| {
                    View::button(ui, t!("modal.cancel"), Colors::white_or_black(false), || {
                        // Close modal.
                        Modal::close();
                    });
                });
                columns[1].vertical_centered_justified(|ui| {
                    View::button(ui, t!("continue"), Colors::white_or_black(false), || {
                        (on_continue)(self);
                    });
                });
            });
            ui.add_space(6.0);
        });
    }
}