use easy_repl::{command, CommandStatus, Repl};
use crate::{cfg};
use crate::op::{makesure, once};

pub fn prepare_view() {
    let repl_bresult = Repl::builder()
        .description("rumia-cli system view: /prepare")
        .prompt("[ rumia-cli: /prepare ] ")
        .add("checklist", command! {
            "print a checklist for prepare sequence",
            () => || {
                println!("Prepare Sequence:\n\
                    sysfs-mount\n\
                    proc-mount\n\
                    bootfs-mount\n\
                    cfg-phase2-load\n\
                    initrd-env-load\n\
                    run-mount-from-cfg\
                ");
                Ok(CommandStatus::Done)
            }
        })
        .add("bootfs-mount", command! {
            "mount /boot",
            () => || {
                makesure::mkdir_p("/boot");
                once::mount_bootfs();
                Ok(CommandStatus::Done)
            }
        })
        .add("cfg-phase2-load", command! {
            "load rumia config phase 2",
            () => || {
                cfg::load_phase2();
                Ok(CommandStatus::Done)
            }
        })
        .add("initrd-env-load", command! {
            "load rumia config phase 2",
            () => || {
                makesure::export_initrd_env_from_cfg();
                Ok(CommandStatus::Done)
            }
        })
        .add("env-load", command! {
            "load rumia config phase 2",
            () => || {
                makesure::export_env_from_cfg();
                Ok(CommandStatus::Done)
            }
        })
        .add("run-mount-cli", command! {
            "mount '/run' with given option",
            (option: String) => |option:String| {
                makesure::mkdir_p("/run");
                once::mount_runfs(option.as_str());
                makesure::mkdir_p_with_mode("/run/initramfs", 0o755);
                Ok(CommandStatus::Done)
            }
        })
        .add("run-mount-from-cfg", command! {
            "mount '/run' with config",
            () => || {
                makesure::mkdir_p("/run");
                once::mount_runfs_from_cfg();
                makesure::mkdir_p_with_mode("/run/initramfs", 0o755);
                Ok(CommandStatus::Done)
            }
        })
        .build();
    let mut repl = match repl_bresult {
        Ok(t) => t,
        Err(err) => {
            println!("[ERROR] fatal error when initializing this view: {:?}", err);
            return;
        }
    };
    let repl_run_result = repl.run();
    match repl_run_result {
        Ok(_) => {}
        Err(err) => {
            println!("[ERROR] this view crash by error: {:?}", err);
            println!("back to parent view...");
        }
    };
}