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use clap::{crate_version, App, Arg};

/// Creates a static clap application for parsing the arguments
pub fn get_app() -> clap::App<'static> {
    let default_exec = if cfg!(windows) {
        "start"
    } else if cfg!(macos) {
        "open"
    } else {
        "xdg-open"
    };

    App::new("fuzzy-pdf")
        .version(crate_version!())
        .author("MarioJim <mario.emilio.j@gmail.com>")
        .about("Fuzzy finder for a collection of pdf files")
        .arg(
            Arg::new("PATH")
                .about("The path to recursively search for pdf files")
                .default_value(".")
                .index(1),
        )
        .arg(
            Arg::new("COMMAND")
                .about("The command to execute when an item has been selected")
                .long_about(COMMAND_LONG_ABOUT)
                .default_value(default_exec)
                .index(2),
        )
        .arg(
            Arg::new("hidden")
                .about("Search hidden files also")
                .short('H')
                .long("hidden"),
        )
        .arg(
            Arg::new("context")
                .about("Surrounding lines to show in the preview")
                .short('c')
                .long("context")
                .takes_value(true),
        )
        .arg(
            Arg::new("max-pages")
                .about("Only parse documents with at most this number of pages. Pass '0' to parse documents with any number of pages")
                .short('m')
                .long("max-pages")
                .takes_value(true),
        )
        .arg(
            Arg::new("quiet")
                .about("Omit printing error messages")
                .short('q')
                .long("quiet"),
        )
}

static COMMAND_LONG_ABOUT: &str = "After selecting a file, use \
this option to either:
 - Pass a '-' to print the file path to stdout (pair this with -q \
option for better results)
 - Pass a string with placeholders to be executed. You can use {} \
or {f} to pass the file path, and {q} for the query typed into the \
search box. If you don't use any placeholders, the string will be \
appended with the file path and executed.

If you don't pass this argument, the program will open the pdf in \
the system's default pdf viewer, using 'start' for Windows, 'open' \
for MacOS, and 'xdg-open' for anything else.";