#!/bin/bash

set -euo pipefail

this_dir="$(cd "$(dirname "$(realpath "$0")")" && pwd)"

# list all commands, name only
cmds() {
    find "${this_dir}" -maxdepth 1 -type f -name '*.sh' -print0 \
        | xargs -0 -n 1 basename \
        | sed 's/\.sh$//' \
        | grep -Ev '^(main|common)$' \
        | sort
}

# list all commands, name and description
cmd_descriptions() {
    for cmd in $(cmds); do
        local cmd_sh="${this_dir}/${cmd}.sh"
        if [[ -x "${cmd_sh}" ]]; then
            local description
            description="$(bash "${cmd_sh}" -h 2>/dev/null | head -1 | sed 's/^[^:]*: *//')"
            if [[ -n "${description}" ]]; then
                printf "%-15s %s\n" "${cmd}" "${description}"
            else
                printf "%-15s\n" "${cmd}"
            fi
        fi
    done
}

if [[ "$#" -gt 0 && ("$1" == "-h" || "$1" == "--help") ]]; then
    cat <<EOF
szecret: Secret management using age encryption

Usage:
  szecret -h|--help
  szecret <command> -h|--help
  szecret <command> [args...]

Available commands:

$(cmd_descriptions | sed 's/^/  /')
EOF
    exit 0
fi

# check number of arguments > 1, error and exit if not
# extract first argument, call script with same name using remaining arguments
if [ $# -lt 1 ]; then
    >&2 cat <<EOF
ERROR: no command specified. Available:

$(cmd_descriptions | sed 's/^/  /')
EOF
    exit 1
fi

cmd="$1"
cmd_sh="${this_dir}/${cmd}.sh" 
shift

if [[ ! -e "${cmd_sh}" ]]; then
    >&2 echo "ERROR: no command named ${cmd}. Available: $(cmds | paste -sd ',' -)"
    exit 1
fi

exec bash "${cmd_sh}" "$@"