use serde::{Deserialize, Serialize};

use crate::Error;

/// Represent block as described in <https://i3wm.org/docs/i3bar-protocol.html>
#[derive(Debug, Clone, Default, Serialize)]
pub struct Block {
    pub full_text: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub short_text: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub color: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub background: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub border: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub border_top: Option<usize>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub border_right: Option<usize>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub border_bottom: Option<usize>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub border_left: Option<usize>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub min_width: Option<MinWidth>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub align: Option<Align>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub name: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub instance: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub urgent: Option<bool>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub separator: Option<bool>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub separator_block_width: Option<usize>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub markup: Option<String>,
}

impl Block {
    pub fn write_stdout(&self) -> Result<(), Error> {
        use std::io::Write;

        let mut buf = serde_json::to_vec(self)?;
        buf.push(b'\n');

        let mut writer = std::io::stdout().lock();
        writer.write_all(&buf)?;
        writer.flush().map_err(Into::into)
    }
}

#[derive(Serialize, Debug, Clone, Copy)]
#[serde(rename_all = "lowercase")]
pub enum Align {
    Center,
    Right,
    Left,
}

#[derive(Serialize, Debug, Clone)]
#[serde(untagged)]
pub enum MinWidth {
    Pixels(usize),
    Text(String),
}

#[derive(Debug, Default, Clone, Serialize, Deserialize)]
#[serde(default)]
pub struct Click {
    pub name: Option<String>,
    pub instance: Option<String>,
    pub full_text: String,
    pub short_text: Option<String>,
    pub color: Option<String>,
    pub background: Option<String>,
    pub button: u8,
    pub event: usize,
    pub modifiers: Option<Vec<String>>,
    pub x: usize,
    pub y: usize,
    pub relative_x: usize,
    pub relative_y: usize,
    pub output_x: Option<usize>,
    pub output_y: Option<usize>,
    pub width: usize,
    pub height: usize,
    pub scale: usize,
}