use crate::Length;

pub struct TextInput<'a, Message> {
    pub state: &'a mut State,
    pub placeholder: String,
    pub value: String,
    pub width: Length,
    pub max_width: Length,
    pub padding: u16,
    pub size: Option<u16>,
    pub on_change: Box<dyn Fn(String) -> Message>,
    pub on_submit: Option<Message>,
}

#[derive(Debug, Default)]
pub struct State {}

impl<'a, Message> TextInput<'a, Message> {
    pub fn new<F>(
        state: &'a mut State,
        placeholder: &str,
        value: &str,
        on_change: F,
    ) -> Self
    where
        F: 'static + Fn(String) -> Message,
    {
        Self {
            state,
            placeholder: String::from(placeholder),
            value: String::from(value),
            width: Length::Fill,
            max_width: Length::Shrink,
            padding: 0,
            size: None,
            on_change: Box::new(on_change),
            on_submit: None,
        }
    }

    /// Sets the width of the [`TextInput`].
    ///
    /// [`TextInput`]: struct.TextInput.html
    pub fn width(mut self, width: Length) -> Self {
        self.width = width;
        self
    }

    /// Sets the maximum width of the [`TextInput`].
    ///
    /// [`TextInput`]: struct.TextInput.html
    pub fn max_width(mut self, max_width: Length) -> Self {
        self.max_width = max_width;
        self
    }

    /// Sets the padding of the [`TextInput`].
    ///
    /// [`TextInput`]: struct.TextInput.html
    pub fn padding(mut self, units: u16) -> Self {
        self.padding = units;
        self
    }

    pub fn size(mut self, size: u16) -> Self {
        self.size = Some(size);
        self
    }

    pub fn on_submit(mut self, message: Message) -> Self {
        self.on_submit = Some(message);
        self
    }
}

impl<'a, Message> std::fmt::Debug for TextInput<'a, Message>
where
    Message: std::fmt::Debug,
{
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        // TODO: Complete once stabilized
        f.debug_struct("TextInput").finish()
    }
}