use std::str;
use std::thread;
use std::time::Duration;
use clap::Parser;
use crate::common::UpdateResult;

// Common utilities/types
mod common;
// Bar Modules
mod bar_modules;

// Commandline parsing
#[derive(Parser, Debug)]
#[command(name = "unibar")]
#[command(version = "1.0")]
#[command(about = "Get string of info for a status bar")]
#[command(about, long_about = "A tool that returns variety of components in a string
 suitable to use in a status bar")]
struct CommandlineArgs {
    /// Update interval in seconds
    #[arg(short = 'i', long, default_value = "1")]
    interval: u64,

    /// Name of the weather station
    #[arg(short = 's', long, default_value = "khio")]
    weather_station: String,

    /// Use Metric units in weather data. Imperial units otherwise
    #[arg(short = 'm', long)]
    weather_metric: bool,

    /// Show music progess
    #[arg(short = 'p', long)]
    music_progress: bool,

    /// Show verbose debug information during run
    #[arg(short = 'D', long)]
    debug: bool,

    /// Show module debug information after all modules are evaluated
    /// but before output is printed
    #[arg(short = 'M', long)]
    debug_modules: bool,

    /// Show module debug information after all modules are evaluated
    /// but before output is printed
    #[arg(short = 'U', long)]
    debug_update: bool,
}

//
// Application (Unibar)
//
//#[derive(Clone)]
struct Unibar {
    opts:                   common::AppOptions,
    bar_modules_enabled:    Vec<Box<dyn bar_modules::BarModuleActions>>,
    debug_modules_done:     bool,
}

impl Unibar {
    // --------------------
    fn run(&mut self) {
        if self.opts.debug {
            self.debug_msg("Debugging ...");
        }
        self.check_options();

        // Set up a list of all modules to be used
        self.bar_modules_enabled.push(Box::new(bar_modules::bar_module_music::UnibarModuleMusic::new(self.opts.clone())));
        self.bar_modules_enabled.push(Box::new(bar_modules::bar_module_memory::UnibarModuleMemory::new(self.opts.clone())));
        self.bar_modules_enabled.push(Box::new(bar_modules::bar_module_cpu::UnibarModuleCpu::new(self.opts.clone())));
        self.bar_modules_enabled.push(Box::new(bar_modules::bar_module_power::UnibarModulePower::new(self.opts.clone())));
        self.bar_modules_enabled.push(Box::new(bar_modules::bar_module_network::UnibarModuleNetwork::new(self.opts.clone())));
        self.bar_modules_enabled.push(Box::new(bar_modules::bar_module_weather::UnibarModuleWeather::new(self.opts.clone())));
        self.bar_modules_enabled.push(Box::new(bar_modules::bar_module_date::UnibarModuleDate::new(self.opts.clone())));
        self.bar_modules_enabled.push(Box::new(bar_modules::bar_module_time::UnibarModuleTime::new(self.opts.clone())));

        // Run in a forever-loop ...
        loop {
            // ... to update the bar contents ...
            self.update_bar_contents();
            // ... at specfied interval
            thread::sleep(Duration::from_millis(self.opts.interval * 1000));
        }

    }

    // --------------------
    fn update_bar_contents(&mut self) {
        // Get module's part to be displayed in the bar
        let mut parts = Vec::new();
        for md in &mut self.bar_modules_enabled {
            let mut mod_parts = Vec::new();

            // Each bar module implements following 4 steps:
            //   * Clear data from previous iteration
            //   * Generate raw data with pertinent information
            //   * Return a unicode icon to be displayed
            //   * Return a String content to be displayed after the icon
            //
            // Following generates ICON+CONTENT string for a module to be displayed
            // in the bar
            match md.should_update() {
                UpdateResult::Update => {
                    md.clear();
                    md.generate_data();
                }
                UpdateResult::Skip => {
                    if self.opts.debug_update {
                        println!("Skipping module {}", md.get_name());
                    }
                }
            }
            mod_parts.push(md.get_icon());
            mod_parts.push(md.get_content());

            parts.push(mod_parts.join(" "));
        }

        self.show_module_debug();

        // Print parts provided by each module
        println!("status {}", parts.join(" "));
    }

    // --------------------
    fn show_module_debug(&mut self) {
        // Show module debug information if enabled
        if self.opts.debug_modules {
            if !self.debug_modules_done {
                let bar_modules_debugged: Vec<Box<dyn bar_modules::BarModuleDebug>> = vec! [
                    Box::new(bar_modules::bar_module_weather::UnibarModuleWeather::new(self.opts.clone())),
                    Box::new(bar_modules::bar_module_music::UnibarModuleMusic::new(self.opts.clone())),
                    Box::new(bar_modules::bar_module_memory::UnibarModuleMemory::new(self.opts.clone())),
                    Box::new(bar_modules::bar_module_network::UnibarModuleNetwork::new(self.opts.clone())),
                    Box::new(bar_modules::bar_module_cpu::UnibarModuleCpu::new(self.opts.clone())),
                    Box::new(bar_modules::bar_module_power::UnibarModulePower::new(self.opts.clone())),
                    Box::new(bar_modules::bar_module_date::UnibarModuleDate::new(self.opts.clone())),
                    Box::new(bar_modules::bar_module_time::UnibarModuleTime::new(self.opts.clone())),
                ];
                for md in bar_modules_debugged {
                    md.post_debug();
                }
                self.debug_modules_done = true;
            }
        }
    }

    // --------------------
    fn check_options(&self) -> bool {
        let all_good = true;

        // If there are option checks to be added, make all_good a
        // mutable var and update its status

        return all_good;
    }

    // --------------------
    fn debug_msg(&self, msg: &str) {
        println!("[Debug ] -----> {}", msg);
    }
}

//
// Entry point
//
fn main() {
    let cmd_args = CommandlineArgs::parse();
    let mut app = Unibar {
        opts: common::AppOptions {
            interval: cmd_args.interval as u64,
            weather_units: if cmd_args.weather_metric { common::TemperatureUnits::Metric }
                                                 else { common::TemperatureUnits::Imperial },
            weather_station: cmd_args.weather_station,
            music_progress: cmd_args.music_progress,
            debug: cmd_args.debug,
            debug_modules: cmd_args.debug_modules,
            debug_update: cmd_args.debug_update,
        },
        bar_modules_enabled: Vec::new(),
        debug_modules_done: false,
    };

    app.run();
}
// References:
// https://reintech.io/blog/working-with-json-in-rust