use std::time::Duration;

use clap::{Parser, builder::PossibleValuesParser};

use super::sharry::File;

#[derive(Parser, Debug, Hash)]
#[command(version, about, long_about = None)]
pub struct Cli {
    /// Timeout in seconds for HTTP actions (set 0 or invalid to disable)
    #[arg(
        short, long, 
        default_value = "10", value_name = "SECS",
        value_parser = parse_seconds,
    )]
    timeout: Duration,

    /// Protocol for Sharry instance
    #[arg(
        short, long,
        default_value = "https", value_name = "VARIANT",
        value_parser = PossibleValuesParser::new(["http", "https"]),
    )]
    pub protocol: String,

    /// Name of the new share
    #[arg(short, long, default_value = "ShrUpl Upload", value_name = "TEXT")]
    pub name: String,

    /// Description of the new share
    #[arg(short, long, value_name = "TEXT")]
    pub description: Option<String>,

    /// Maximum number of views for the new share
    #[arg(short, long, default_value_t = 100, value_name = "N")]
    pub max_views: u32,

    /// Chunk size for uploading, in MiB
    #[arg(short, long, default_value_t = 10, value_name = "N")]
    pub chunk_size: usize,

    /// Base URL for Sharry Instance
    pub url: String,

    /// ID of a public alias to use
    pub alias: String,

    /// Files to upload to the new share
    #[arg(value_name = "FILE", required = true, value_parser = parse_sharry_file)]
    pub files: Vec<File>,
}

fn parse_seconds(data: &str) -> Result<Duration, String> {
    data.parse().or(Ok(0)).map(Duration::from_secs)
}

fn parse_sharry_file(data: &str) -> Result<File, String> {
    File::new(data).map_err(|e| e.to_string())
}

impl Cli {
    pub fn get_timeout(&self) -> Option<Duration> {
        (!self.timeout.is_zero()).then_some(self.timeout)
    }
}