use orbtk::prelude::*;

use crate::{
    base_state::BaseState,
    data::{PolicyData, PolicyDataList},
    keys::*,
};

/// Actions that can execute on the task view.
#[derive(Debug, Clone, Copy)]
pub enum Action {
    ClearEntry(Entity),
    InputTextChanged(Entity),
    OpenMenu(Entity),
    ParseEntry(Entity),
    RemoveFocus(Entity),
    SetEntry(Entity),
    TextChanged(Entity, usize),
}

/// Handles the requests of the `PolicyCheckView`.
#[derive(Default, AsAny)]
pub struct PolicyCheckState {
    action:Option<Action>,
    last_focused: Option<Entity>,
    pub text_box: Entity,
    menu_button: Entity,
    policy_number_valid: bool,
}

impl BaseState for PolicyCheckState {}

impl PolicyCheckState {
    /// Sets a new action.
    pub fn action(&mut self, action: Action) {
	self.action = action.into();
    }

    /// Clear text in text box.
    pub fn clear_entry(&mut self, text_box: Entity, ctx: &mut Context) {
	let mut text_box = TextBox::get(ctx.get_widget(text_box));
	let text = text_box.text_mut();
	println!("reset {}", text);
    }

    /// Open menu.
    pub fn open_menu(&mut self, text_block: Entity, ctx: &mut Context) {
	let mut text_block = TextBlock::get(ctx.get_widget(text_block));
	let text = text_block.text_mut();
	println!("Menu text: {}", text);
    }

    fn parse_entry(&self, text_box: Entity, ctx: &mut Context) {
	// Old style
	//let length = ctx.get_widget(text_box).get::<String>("policy_number").len();
	// New style
	let mut text_box = TextBox::get(ctx.get_widget(text_box));
	let policy_number = text_box.text_mut();

	println!("parsing policy Number: {}", policy_number);

	// Parse policy code: "AS-123456789"
	// DION VERS POLLFNR
	// 1    AS   1515735810
	let policy_number_length = policy_number.len();
	if policy_number_length == 10 {
	    println!("Verify {} ...", policy_number);
	    // check against hash-table
	    //ctx.get_widget(text_box).set("policy_number_valid", true);
	    //TextBox::get(ctx.child("text_box")).set_foreground(colors::LINK_WATER_COLOR);
	}
	if policy_number_length < 10 {
	    println!("Policy number is to short!");
	    //TextBox::get(ctx.child("text_box")).set_foreground("#ffffff");
	    //TextBox::get(ctx.child("text_box")).set_background("#5b0f22");
	}
	if policy_number_length > 10 {
	    println!("Policy number is to big!");
	    //TextBox::get(ctx.child("text_box")).set_foreground("#ffffff");
	    //TextBox::get(ctx.child("text_box")).set_background("#5b0f22");
	}

	// if let policy_number = text_box.text() {
	//     match policy_number {
	//	_ => {
	//	  println!("policynumber: {} is valid!", policy_number);
	//	}
	//     }
	// }
    }

    /// If TextBox 'policy_number' is empty, disable button "check"
    /// otherwise enabled it.
    fn set_check_button(&self, text_box: Entity, ctx: &mut Context) {
	if ctx.get_widget(text_box).get::<String>("policy_number_check").is_empty() {
	    ctx.get_widget(self.text_box).set("enabled", false);
	} else {
	    ctx.get_widget(self.text_box).set("enabled", true);
	}

	ctx.get_widget(self.text_box).update_theme_by_state(true);
    }

    /// Change status of given text box to edit mode.
    fn set_entry(&self, text_box: Entity, ctx: &mut Context) {
	if *ctx.get_widget(text_box).get::<bool>("focused") {
	    ctx.get_widget(text_box).set("enabled", false);
	    ctx.push_event_by_window(FocusEvent::RemoveFocus(text_box));
	    return;
	}

	if let Some(old_focused_element) = ctx.window().get::<Global>("global").focused_widget {
	    ctx.push_event_by_window(FocusEvent::RemoveFocus(old_focused_element));
	}

	ctx.get_widget(text_box).set("enabled", true);

	// select all
	ctx.get_widget(text_box)
	    .get_mut::<TextSelection>("text_selection")
	    .start_index = 0;
	ctx.get_widget(text_box)
	    .get_mut::<TextSelection>("text_selection")
	    .length = ctx.get_widget(text_box).get::<String>("policy_number").len();
	ctx.push_event_by_window(FocusEvent::RequestFocus(text_box));
    }
}

impl State for PolicyCheckState {
    fn init(&mut self, _: &mut Registry, ctx: &mut Context) {
	self.menu_button = ctx
	    .entity_of_child(ID_POLICY_CHECK_MENU_BUTTON)
	    .expect("PolicyCheckState.init: Can't find child 'Menu button'.");
	self.text_box = ctx
	   .entity_of_child(ID_POLICY_CHECK_POLICY_NUMBER)
	   .expect("PolicyCheckState.init: Can't find child 'Text Box'.");
    }

    fn update(&mut self, _registry: &mut Registry, ctx: &mut Context) {
	// clear focus on focus moved
	if self.last_focused != ctx.window().get::<Global>("global").focused_widget {
	    if let Some(last_focused) = self.last_focused {
		ctx.get_widget(last_focused).set("focused", false);
		ctx.get_widget(last_focused)
		    .set("visibility", Visibility::Collapsed);
	    }
	}

	if let Some(action) = self.action {
	    match action {
		Action::ClearEntry(text_box) => {
		    self.clear_entry(text_box, ctx);
		}
		Action::InputTextChanged(text_box) => {
		    self.set_check_button(text_box, ctx);
		}
		Action::OpenMenu(text_block) => {
		    self.open_menu(text_block, ctx);
		}
		Action::ParseEntry(text_box) => {
		    self.parse_entry(text_box, ctx);
		}
		Action::RemoveFocus(text_box) => {
		    ctx.get_widget(text_box).set("enabled", false);
		    ctx.push_event_by_window(FocusEvent::RemoveFocus(text_box));
		}
		Action::SetEntry(text_box) => {
		    self.last_focused = Some(text_box);
		    self.set_entry(text_box, ctx);
		}
		Action::TextChanged(entity, _index) => {
		    self.set_entry(entity, ctx);
		}
	    }
	}
	self.action = None;
    }
}