use builtin;
use str;

set edit:completion:arg-completer[watchexec] = {|@words|
    fn spaces {|n|
        builtin:repeat $n ' ' | str:join ''
    }
    fn cand {|text desc|
        edit:complex-candidate $text &display=$text' '(spaces (- 14 (wcswidth $text)))$desc
    }
    var command = 'watchexec'
    for word $words[1..-1] {
        if (str:has-prefix $word '-') {
            break
        }
        set command = $command';'$word
    }
    var completions = [
        &'watchexec'= {
            cand -w 'Watch a specific file or directory'
            cand --watch 'Watch a specific file or directory'
            cand -W 'Watch a specific directory, non-recursively'
            cand --watch-non-recursive 'Watch a specific directory, non-recursively'
            cand -F 'Watch files and directories from a file'
            cand --watch-file 'Watch files and directories from a file'
            cand -c 'Clear screen before running command'
            cand --clear 'Clear screen before running command'
            cand -o 'What to do when receiving events while the command is running'
            cand --on-busy-update 'What to do when receiving events while the command is running'
            cand -s 'Send a signal to the process when it''s still running'
            cand --signal 'Send a signal to the process when it''s still running'
            cand --stop-signal 'Signal to send to stop the command'
            cand --stop-timeout 'Time to wait for the command to exit gracefully'
            cand --map-signal 'Translate signals from the OS to signals to send to the command'
            cand -d 'Time to wait for new events before taking action'
            cand --debounce 'Time to wait for new events before taking action'
            cand --delay-run 'Sleep before running the command'
            cand --poll 'Poll for filesystem changes'
            cand --shell 'Use a different shell'
            cand --emit-events-to 'Configure event emission'
            cand -E 'Add env vars to the command'
            cand --env 'Add env vars to the command'
            cand --wrap-process 'Configure how the process is wrapped'
            cand --color 'When to use terminal colours'
            cand --project-origin 'Set the project origin'
            cand --workdir 'Set the working directory'
            cand -e 'Filename extensions to filter to'
            cand --exts 'Filename extensions to filter to'
            cand -f 'Filename patterns to filter to'
            cand --filter 'Filename patterns to filter to'
            cand --filter-file 'Files to load filters from'
            cand -j '[experimental] Filter programs'
            cand --filter-prog '[experimental] Filter programs'
            cand -i 'Filename patterns to filter out'
            cand --ignore 'Filename patterns to filter out'
            cand --ignore-file 'Files to load ignores from'
            cand --fs-events 'Filesystem events to filter to'
            cand --completions 'Generate a shell completions script'
            cand --log-file 'Write diagnostic logs to a file'
            cand -r 'Restart the process if it''s still running'
            cand --restart 'Restart the process if it''s still running'
            cand --stdin-quit 'Exit when stdin closes'
            cand --no-vcs-ignore 'Don''t load gitignores'
            cand --no-project-ignore 'Don''t load project-local ignores'
            cand --no-global-ignore 'Don''t load global ignores'
            cand --no-default-ignore 'Don''t use internal default ignores'
            cand --no-discover-ignore 'Don''t discover ignore files at all'
            cand --ignore-nothing 'Don''t ignore anything at all'
            cand -p 'Wait until first change before running command'
            cand --postpone 'Wait until first change before running command'
            cand -n 'Shorthand for ''--shell=none'''
            cand --no-environment 'Deprecated shorthand for ''--emit-events=none'''
            cand --only-emit-events 'Only emit events to stdout, run no commands'
            cand --no-process-group 'Don''t use a process group'
            cand -1 'Testing only: exit Watchexec after the first run'
            cand -N 'Alert when commands start and end'
            cand --notify 'Alert when commands start and end'
            cand --timings 'Print how long the command took to run'
            cand -q 'Don''t print starting and stopping messages'
            cand --quiet 'Don''t print starting and stopping messages'
            cand --bell 'Ring the terminal bell on command completion'
            cand --no-meta 'Don''t emit fs events for metadata changes'
            cand --print-events 'Print events that trigger actions'
            cand --manual 'Show the manual page'
            cand -v 'Set diagnostic log level'
            cand --verbose 'Set diagnostic log level'
            cand -h 'Print help (see more with ''--help'')'
            cand --help 'Print help (see more with ''--help'')'
            cand -V 'Print version'
            cand --version 'Print version'
        }
    ]
    $completions[$command]
}