use iced::{
    Alignment, Font, Length, Point, Settings, Size, Task,
    alignment::{Horizontal, Vertical},
    font::Family,
    widget::{Column, Row, Space, Text, column, row},
    window,
};

#[derive(Debug, Clone)]
enum Message {}

struct WeatherPopup {
    city: String,
    country: String,
    weather_main: String,
    weather_description: String,
    icon_code: String,
    temperature: String,
    unit: char,
}

impl WeatherPopup {
    fn new(
        city: String,
        country: String,
        weather_main: String,
        weather_description: String,
        icon_code: String,
        temperature: String,
        unit: char,
    ) -> Self {
        Self {
            city,
            country,
            weather_main,
            weather_description,
            icon_code,
            temperature,
            unit,
        }
    }

    fn update(&mut self, _message: Message) -> Task<Message> {
        Task::none()
    }

    fn view(&self) -> iced::Element<Message> {
        let default_font = "IosevkaTermSlab Nerd Font Mono";
        column![
            // City and country
            Row::with_children(vec![
                Text::new(format!("{}, {}", self.city, self.country))
                    .font(Font {
                        family: Family::Name(default_font),
                        ..Font::DEFAULT
                    })
                    .size(16)
                    .into(),
            ])
            .width(Length::Fill),
            // Weather icon and temperature
            Row::with_children(vec![
                Text::new(icon_to_nerd_font(&self.icon_code))
                    .font(Font {
                        family: Family::Name(default_font),
                        ..Font::DEFAULT
                    })
                    .align_x(Horizontal::Left)
                    .size(40)
                    .into(),
                Space::with_width(Length::Fill).into(),
                Text::new(format!("{}°{}", self.temperature, self.unit))
                    .font(Font {
                        family: Family::Name(default_font),
                        ..Font::DEFAULT
                    })
                    .size(32)
                    .into(),
            ])
            .width(Length::Fill),
            // Weather description
            Row::with_children(vec![
                Text::new(format!(
                    "{} - {}",
                    self.weather_main, self.weather_description
                ))
                .font(Font {
                    family: Family::Name(default_font),
                    ..Font::DEFAULT
                })
                .size(16)
                .into(),
            ])
            .width(Length::Fill),
        ]
        .spacing(10)
        .padding(20)
        .align_x(Horizontal::Center)
        .into()
    }
}

pub fn show_popup(
    city: String,
    country: String,
    weather_main: String,
    weather_description: String,
    icon_code: String,
    temperature: String,
    unit: char,
) -> iced::Result {
    iced::application(
        "Weather Popup", // Title
        WeatherPopup::update,
        WeatherPopup::view,
    )
    .window(window::Settings {
        size: Size {
            width: 300.,
            height: 150.,
        },
        position: window::Position::Specific(Point { x: 20., y: 20. }),
        decorations: false,
        ..window::Settings::default()
    })
    .run_with(move || {
        (
            WeatherPopup::new(
                city,
                country,
                weather_main,
                weather_description,
                icon_code,
                temperature,
                unit,
            ),
            Task::none(),
        )
    })
}

/// Convert OWM icon codes (e.g. "01d", "09n") to Nerd Font weather glyphs.
fn icon_to_nerd_font(code: &str) -> String {
    match code {
        "01d" => "",         // clear day
        "01n" => "",         // clear night
        "02d" | "02n" => "", // few clouds
        "03d" | "03n" => "", // scattered clouds
        "04d" | "04n" => "", // broken clouds
        "09d" | "09n" => "", // shower rain
        "10d" | "10n" => "", // rain
        "11d" | "11n" => "", // thunderstorm
        "13d" | "13n" => "", // snow
        "50d" | "50n" => "", // mist
        _ => "",
    }
    .into()
}