use std::io::{self, Write};

use anyhow::{Context, Result};
use askama::Template;

use crate::app::{Init, InitShell, Run};
use crate::config;
use crate::error::BrokenPipeHandler;
use crate::shell::{self, Opts};

impl Run for Init {
    fn run(&self) -> Result<()> {
        let cmd = if self.no_aliases { None } else { Some(self.cmd.as_str()) };

        let echo = config::echo();
        let resolve_symlinks = config::resolve_symlinks();

        let opts = &Opts { cmd, hook: self.hook, echo, resolve_symlinks };

        let source = match self.shell {
            InitShell::Bash => shell::Bash(opts).render(),
            InitShell::Elvish => shell::Elvish(opts).render(),
            InitShell::Fish => shell::Fish(opts).render(),
            InitShell::Nushell => shell::Nushell(opts).render(),
            InitShell::Posix => shell::Posix(opts).render(),
            InitShell::Powershell => shell::Powershell(opts).render(),
            InitShell::Xonsh => shell::Xonsh(opts).render(),
            InitShell::Zsh => shell::Zsh(opts).render(),
        }
        .context("could not render template")?;
        writeln!(io::stdout(), "{}", source).pipe_exit("stdout")
    }
}