devcleaner 0.1.2

use std::fmt;

use crate::event::Key;

// using a macro so that we can automatically generate an iterable vector for bindings. This beats reflection :)
macro_rules! generate_keybindings {
  ($($field:ident),+) => {
    pub struct KeyBindings { $(pub $field: KeyBinding),+ }
    impl KeyBindings {
      pub fn as_iter(&self) -> Vec<&KeyBinding> {
        vec![
            $(&self.$field),+
        ]
      }
    }
  };
}

generate_keybindings! {
  // order here is shown as is in Help
  quit,
  esc,
  help,
  submit,
  refresh,
  toggle_theme,
  cycle_main_views,
  jump_to_current_context,
  jump_to_all_context,
  jump_to_utilization,
  copy_to_clipboard,
  pg_up,
  pg_down,
  up,
  down,
  left,
  right,
  toggle_info,
  log_auto_scroll,
  select_all_namespace,
  jump_to_namespace,
  describe_resource,
  resource_yaml,
  jump_to_pods,
  jump_to_services,
  jump_to_nodes,
  jump_to_configmaps,
  jump_to_statefulsets,
  jump_to_replicasets,
  jump_to_deployments,
  jump_to_jobs,
  jump_to_daemonsets,
  jump_to_more_resources
}

#[derive(PartialEq, Eq, Clone, Copy, Hash, Debug)]
pub enum HContext {
    General,
    Overview,
}

impl fmt::Display for HContext {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "{:?}", self)
    }
}

#[derive(Clone)]
pub struct KeyBinding {
    pub key: Key,
    pub alt: Option<Key>,
    pub desc: &'static str,
    pub context: HContext,
}

pub const DEFAULT_KEYBINDING: KeyBindings = KeyBindings {
    quit: KeyBinding {
        key: Key::Ctrl('c'),
        alt: Some(Key::Char('q')),
        desc: "Quit",
        context: HContext::General,
    },
    esc: KeyBinding {
        key: Key::Esc,
        alt: None,
        desc: "Close child page/Go back",
        context: HContext::General,
    },
    help: KeyBinding {
        key: Key::Char('?'),
        alt: None,
        desc: "Help page",
        context: HContext::General,
    },
    submit: KeyBinding {
        key: Key::Enter,
        alt: None,
        desc: "Select table row",
        context: HContext::General,
    },
    refresh: KeyBinding {
        key: Key::Ctrl('r'),
        alt: None,
        desc: "Refresh data",
        context: HContext::General,
    },
    toggle_theme: KeyBinding {
        key: Key::Char('t'),
        alt: None,
        desc: "Toggle theme",
        context: HContext::General,
    },
    jump_to_current_context: KeyBinding {
        key: Key::Char('A'),
        alt: None,
        desc: "Switch to active context view",
        context: HContext::General,
    },
    jump_to_all_context: KeyBinding {
        key: Key::Char('C'),
        alt: None,
        desc: "Switch to all contexts view",
        context: HContext::General,
    },
    jump_to_utilization: KeyBinding {
        key: Key::Char('U'),
        alt: None,
        desc: "Switch to resource utilization view",
        context: HContext::General,
    },
    cycle_main_views: KeyBinding {
        key: Key::Tab,
        alt: None,
        desc: "Cycle through main views",
        context: HContext::General,
    },
    copy_to_clipboard: KeyBinding {
        key: Key::Char('c'),
        alt: None,
        desc: "Copy log/output to clipboard",
        context: HContext::General,
    },
    down: KeyBinding {
        key: Key::Down,
        alt: Some(Key::Char('j')),
        desc: "Next row/Scroll down",
        context: HContext::General,
    },
    up: KeyBinding {
        key: Key::Up,
        alt: Some(Key::Char('k')),
        desc: "Previous row/Scroll up",
        context: HContext::General,
    },
    pg_up: KeyBinding {
        key: Key::PageUp,
        alt: None,
        desc: "Scroll page up",
        context: HContext::General,
    },
    pg_down: KeyBinding {
        key: Key::PageDown,
        alt: None,
        desc: "Scroll page down",
        context: HContext::General,
    },
    left: KeyBinding {
        key: Key::Left,
        alt: Some(Key::Char('h')),
        desc: "Next resource tab",
        context: HContext::Overview,
    },
    right: KeyBinding {
        key: Key::Right,
        alt: Some(Key::Char('l')),
        desc: "Previous resource tab",
        context: HContext::Overview,
    },
    toggle_info: KeyBinding {
        key: Key::Char('i'),
        alt: None,
        desc: "Show/Hide info bar",
        context: HContext::Overview,
    },
    log_auto_scroll: KeyBinding {
        key: Key::Char('s'),
        alt: None,
        desc: "Toggle log auto scroll",
        context: HContext::Overview,
    },
    jump_to_namespace: KeyBinding {
        key: Key::Char('n'),
        alt: None,
        desc: "Select namespace block",
        context: HContext::Overview,
    },
    select_all_namespace: KeyBinding {
        key: Key::Char('a'),
        alt: None,
        desc: "Select all namespaces",
        context: HContext::Overview,
    },
    describe_resource: KeyBinding {
        key: Key::Char('d'),
        alt: None,
        desc: "Describe resource",
        context: HContext::Overview,
    },
    resource_yaml: KeyBinding {
        key: Key::Char('y'),
        alt: None,
        desc: "Get Resource YAML",
        context: HContext::Overview,
    },
    jump_to_pods: KeyBinding {
        key: Key::Char('1'),
        alt: None,
        desc: "Select pods tab",
        context: HContext::Overview,
    },
    jump_to_services: KeyBinding {
        key: Key::Char('2'),
        alt: None,
        desc: "Select services tab",
        context: HContext::Overview,
    },
    jump_to_nodes: KeyBinding {
        key: Key::Char('3'),
        alt: None,
        desc: "Select nodes tab",
        context: HContext::Overview,
    },
    jump_to_configmaps: KeyBinding {
        key: Key::Char('4'),
        alt: None,
        desc: "Select configmaps tab",
        context: HContext::Overview,
    },
    jump_to_statefulsets: KeyBinding {
        key: Key::Char('5'),
        alt: None,
        desc: "Select replicasets tab",
        context: HContext::Overview,
    },
    jump_to_replicasets: KeyBinding {
        key: Key::Char('6'),
        alt: None,
        desc: "Select statefulsets tab",
        context: HContext::Overview,
    },
    jump_to_deployments: KeyBinding {
        key: Key::Char('7'),
        alt: None,
        desc: "Select deployments tab",
        context: HContext::Overview,
    },
    jump_to_jobs: KeyBinding {
        key: Key::Char('8'),
        alt: None,
        desc: "Select jobs tab",
        context: HContext::Overview,
    },
    jump_to_daemonsets: KeyBinding {
        key: Key::Char('9'),
        alt: None,
        desc: "Select daemon sets tab",
        context: HContext::Overview,
    },
    jump_to_more_resources: KeyBinding {
        key: Key::Char('0'),
        alt: None,
        desc: "Select more resources",
        context: HContext::Overview,
    },
};

pub fn get_help_docs() -> Vec<Vec<String>> {
    let items = DEFAULT_KEYBINDING.as_iter();

    items.iter().map(|it| help_row(it)).collect()
}

fn help_row(item: &KeyBinding) -> Vec<String> {
    vec![
        if item.alt.is_some() {
            format!("{} | {}", item.key, item.alt.unwrap())
        } else {
            item.key.to_string()
        },
        String::from(item.desc),
        item.context.to_string(),
    ]
}

#[cfg(test)]
mod tests {
    use super::DEFAULT_KEYBINDING;

    #[test]
    fn test_as_iter() {
        assert!(DEFAULT_KEYBINDING.as_iter().len() >= 28);
    }
}