use clap::{Parser, ValueEnum};

#[derive(Parser)]
pub struct Cmd {
    shell: Shell,

    /// Disable the binding of CTRL-R to atuin
    #[clap(long)]
    disable_ctrl_r: bool,

    /// Disable the binding of the Up Arrow key to atuin
    #[clap(long)]
    disable_up_arrow: bool,
}

#[derive(Clone, Copy, ValueEnum)]
pub enum Shell {
    /// Zsh setup
    Zsh,
    /// Bash setup
    Bash,
    /// Fish setup
    Fish,
    /// Nu setup
    Nu,
}

impl Cmd {
    fn init_zsh(&self) {
        let base = include_str!("../shell/atuin.zsh");

        println!("{base}");

        if std::env::var("ATUIN_NOBIND").is_err() {
            const BIND_CTRL_R: &str = "bindkey '^r' _atuin_search_widget";
            const BIND_UP_ARROW: &str = "bindkey '^[[A' _atuin_up_search_widget
bindkey '^[OA' _atuin_up_search_widget";
            if !self.disable_ctrl_r {
                println!("{BIND_CTRL_R}");
            }
            if !self.disable_up_arrow {
                println!("{BIND_UP_ARROW}");
            }
        }
    }

    fn init_bash(&self) {
        let base = include_str!("../shell/atuin.bash");
        println!("{base}");

        if std::env::var("ATUIN_NOBIND").is_err() {
            const BIND_CTRL_R: &str = r#"bind -x '"\C-r": __atuin_history'"#;
            const BIND_UP_ARROW: &str = r#"bind -x '"\e[A": __atuin_history --shell-up-key-binding'
bind -x '"\eOA": __atuin_history --shell-up-key-binding'"#;
            if !self.disable_ctrl_r {
                println!("{BIND_CTRL_R}");
            }
            if !self.disable_up_arrow {
                println!("{BIND_UP_ARROW}");
            }
        }
    }

    fn init_fish(&self) {
        let full = include_str!("../shell/atuin.fish");
        println!("{full}");

        if std::env::var("ATUIN_NOBIND").is_err() {
            const BIND_CTRL_R: &str = r"bind \cr _atuin_search";
            const BIND_UP_ARROW: &str = r"bind -k up _atuin_bind_up
bind \eOA _atuin_bind_up
bind \e\[A _atuin_bind_up";
            const BIND_CTRL_R_INS: &str = r"bind -M insert \cr _atuin_search";
            const BIND_UP_ARROW_INS: &str = r"bind -M insert -k up _atuin_bind_up
bind -M insert \eOA _atuin_bind_up
bind -M insert \e\[A _atuin_bind_up";

            if !self.disable_ctrl_r {
                println!("{BIND_CTRL_R}");
            }
            if !self.disable_up_arrow {
                println!("{BIND_UP_ARROW}");
            }

            println!("if bind -M insert > /dev/null 2>&1");
            if !self.disable_ctrl_r {
                println!("{BIND_CTRL_R_INS}");
            }
            if !self.disable_up_arrow {
                println!("{BIND_UP_ARROW_INS}");
            }
            println!("end");
        }
    }

    fn init_nu(&self) {
        let full = include_str!("../shell/atuin.nu");
        println!("{full}");

        if std::env::var("ATUIN_NOBIND").is_err() {
            const BIND_CTRL_R: &str = r#"let-env config = (
    $env.config | upsert keybindings (
        $env.config.keybindings
        | append {
            name: atuin
            modifier: control
            keycode: char_r
            mode: [emacs, vi_normal, vi_insert]
            event: { send: executehostcommand cmd: (_atuin_search_cmd) }
        }
    )
)
"#;
            const BIND_UP_ARROW: &str = r#"let-env config = (
    $env.config | upsert keybindings (
        $env.config.keybindings
        | append {
            name: atuin
            modifier: none
            keycode: up
            mode: [emacs, vi_normal, vi_insert]
            event: { send: executehostcommand cmd: (_atuin_search_cmd '--shell-up-key-binding') }
        }
    )
)
"#;
            if !self.disable_ctrl_r {
                println!("{BIND_CTRL_R}");
            }
            if !self.disable_up_arrow {
                println!("{BIND_UP_ARROW}");
            }
        }
    }

    pub fn run(self) {
        match self.shell {
            Shell::Zsh => self.init_zsh(),
            Shell::Bash => self.init_bash(),
            Shell::Fish => self.init_fish(),
            Shell::Nu => self.init_nu(),
        }
    }
}