use clap::Parser;
use serde::{Deserialize, Serialize};
use std::io::{BufRead, Write};
use xdg::BaseDirectories;

mod cli;

fn main() {
    let args = cli::Args::parse();

    let xdg_dirs = BaseDirectories::with_prefix(env!("CARGO_PKG_NAME")).unwrap();

    let tasks_file_path = xdg_dirs.place_data_file("data.json").unwrap();
    let mut tasks: Vec<Task> = std::fs::File::open(&tasks_file_path)
        .map(|file| serde_json::from_reader(file).unwrap())
        .unwrap_or_default();

    match args.command {
        cli::SubCommand::Add { link, name } => {
            tasks.push(Task {
                name,
                link,
                description: None,
            });

            let mut file = std::fs::File::create(&tasks_file_path).unwrap();
            file.write_all(&serde_json::to_vec(&tasks).unwrap())
                .unwrap();

            println!("added");
        }
        cli::SubCommand::Edit {
            idx,
            name,
            link,
            no_link,
        } => {
            if idx == 0 || idx > tasks.len() {
                println!("invalid index");
            }

            let mut task = &mut tasks[idx - 1];
            if let Some(name) = name {
                task.name = name;
            }
            if let Some(link) = link {
                task.link = Some(link);
            } else if no_link {
                task.link = None;
            }

            let mut file = std::fs::File::create(&tasks_file_path).unwrap();
            file.write_all(&serde_json::to_vec(&tasks).unwrap())
                .unwrap();

            println!("changed");
        }
        cli::SubCommand::Remove { idx } => {
            if idx == 0 || idx > tasks.len() {
                println!("invalid index");
            }

            println!("You are deleting task:");
            println!("  {}", tasks[idx - 1].name);
            println!();
            println!("In most cases you need to `finish` command");
            loop {
                print!("Do you still want to delete the task? (y/N): ");
                std::io::stdout().flush().unwrap();
                let mut stdin = std::io::stdin().lock();
                let mut buf = String::new();
                stdin.read_line(&mut buf).unwrap();
                match buf.chars().next().unwrap_or_default() {
                    '\r' | '\n' | 'n' | 'N' => return,
                    'y' | 'Y' => break,
                    _ => println!("Unrecognised answer. Please try again."),
                }
            }

            tasks.remove(idx - 1);

            let mut file = std::fs::File::create(&tasks_file_path).unwrap();
            file.write_all(&serde_json::to_vec(&tasks).unwrap())
                .unwrap();

            println!("removed");
        }
        cli::SubCommand::List => {
            for (i, task) in tasks.iter().enumerate() {
                print!("{}. ", i + 1);
                if task.link.is_some() {
                    print!("(link) ");
                }
                println!("{}", task.name);
            }
        }
        cli::SubCommand::Start => {
            println!("starting...");
            println!("-- on start hook found");
            println!("-- running...");
            println!("> curl ...");
            println!("-- status was changed to \"In progress\" successfuly");
            println!("started");
        }
        cli::SubCommand::Pause => {
            println!("pausing...");
            println!("paused");
        }
        cli::SubCommand::Finish => {
            println!("finishing...");
            println!("-- on finish hook found");
            println!("-- running...");
            println!("> curl ...");
            println!("-- status was changed to \"Deploy\" successfuly");
            println!("finished");
        }
        cli::SubCommand::Status => {
            println!("Information about your current task:");
            println!("[work]");
            println!("https://redmine.example.com/issues/4051");
            println!(
                "#4051 Plannig/Assignment: Assign week and day general delvirebles after regular"
            );
            println!("-------------------------------------------------------------------------");
            println!("lorem impsum dolor dolor impsum lorem lorem impsum");
            println!("lorem dolor impsum lorem lorem impsum");
            println!("lorem dolor impsum lorem lorem impsum lorem impsum dolor dolor impsum lorem");
            println!("lorem impsum");
        }
    }
}

#[derive(Deserialize, Serialize)]
struct Task {
    name: String,
    link: Option<String>,
    description: Option<String>,
    // created_at
}