mod constants;
mod utils;

use crate::constants::{DEFAULT_STORAGE_NAME, SETTINGS_PATH};
use crate::utils::{create_paths_for_repo, get_repo, load_settings};
use mediarepo_core::error::RepoResult;
use mediarepo_core::settings::Settings;
use mediarepo_core::type_keys::SettingsKey;
use mediarepo_model::type_keys::RepoKey;
use mediarepo_socket::get_builder;
use std::path::PathBuf;
use structopt::StructOpt;
use tokio::fs;

#[derive(Debug, StructOpt)]
#[structopt(name = "mediarepo", about = "A multimedia repository")]
struct Opt {
    /// The path to the repository. Defaults to the current working directory
    #[structopt(long, short, parse(from_os_str), default_value = ".")]
    repo: PathBuf,

    /// The subcommand to invoke
    #[structopt(subcommand)]
    cmd: SubCommand,
}

#[derive(Debug, StructOpt)]
enum SubCommand {
    /// Initializes an empty repository
    Init {
        /// Forces the creation of a new repository. This will delete everything in the repository
        /// path to create an empty repository.
        #[structopt(short, long)]
        force: bool,
    },

    /// Starts the event server for the selected repository
    Start,
}

#[tokio::main]
async fn main() -> RepoResult<()> {
    let opt: Opt = Opt::from_args();
    match opt.cmd {
        SubCommand::Init { force } => init(opt, force).await,
        SubCommand::Start => start_server(opt).await,
    }?;

    Ok(())
}

/// Starts the server
async fn start_server(opt: Opt) -> RepoResult<()> {
    let settings = load_settings(&opt.repo.join(SETTINGS_PATH)).await?;
    let repo = get_repo(&opt.repo.join(&settings.database_path).to_str().unwrap()).await?;

    get_builder(&settings.listen_address)
        .insert::<SettingsKey>(settings)
        .insert::<RepoKey>(repo)
        .build_server()
        .await?;

    Ok(())
}

/// Initializes an empty repository
async fn init(opt: Opt, force: bool) -> RepoResult<()> {
    if force {
        fs::remove_dir_all(&opt.repo).await?;
    }
    let settings = Settings::default();
    create_paths_for_repo(&opt.repo, &settings).await?;
    let db_path = opt.repo.join(&settings.database_path);
    if db_path.exists() {
        panic!("Database already exists in location. Use --force with init to delete everything and start a new repository");
    }
    let repo = get_repo(&db_path.to_str().unwrap()).await?;
    let storage_path = opt.repo.join(&settings.default_file_store);
    repo.add_storage(DEFAULT_STORAGE_NAME, storage_path.to_str().unwrap())
        .await?;
    let settings_string = settings.to_toml_string()?;
    fs::write(opt.repo.join(SETTINGS_PATH), &settings_string.into_bytes()).await?;

    Ok(())
}