use crate::*;

impl Taggart {
    pub fn mode_edit (&mut self, event: &Event) {
        match event {
            press!(Char(c))       => self.edit_insert(*c),
            press!(Shift-Char(c)) => self.edit_insert(c.to_uppercase().next().unwrap()),
            press!(Backspace)     => self.edit_backspace(),
            press!(Delete)        => self.edit_delete(),
            press!(Enter)         => self.edit_confirm(),
            press!(Esc)           => self.edit_cancel(),
            _ => {}
        }
    }
    pub fn edit_begin (&mut self) {
        if let Some(column) = self.columns.0.get(self.column)
            && column.setter.is_some()
        {
            let value = (column.getter)(&self.entries[self.cursor]);
            let value = format!("{}", value.unwrap_or_default());
            self.mode = Some(Mode::Edit {
                index: value.len(),
                value: value.into(),
            });
        }
    }
    pub fn edit_cancel (&mut self) {
        self.mode = None;
    }
    pub fn edit_confirm (&mut self) {
        let value = if let Some(Mode::Edit { value, .. }) = &self.mode {
            Some(value.clone())
        } else {
            None
        };
        if let Some(value) = value
            && let Some(column) = self.columns.0.get(self.column)
            && let Some(setter) = &column.setter
            && self.entries.get_mut(self.cursor).is_some()
        {
            setter(self, self.cursor, value.as_ref());
            self.mode = None;
        }
    }
    pub fn edit_insert (&mut self, c: char) {
        if let Some(Mode::Edit { value, index }) = &self.mode {
            self.mode = Some(Mode::Edit {
                index: *index + 1,
                value: format!("{value}{c}").into()
            });
        }
    }
    pub fn edit_backspace (&mut self) {
        if let Some(Mode::Edit { value, index }) = &self.mode {
            let mut chars = value.chars();
            chars.next_back();
            self.mode = Some(Mode::Edit {
                index: index.saturating_sub(1),
                value: chars.as_str().into()
            });
        }
    }
    pub fn edit_delete (&mut self) {
        todo!()
    }
}