#!/bin/sh

# The MIT License (MIT)
#
# Copyright © 2020-2025 pacman64
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the “Software”), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.


# tldr [options...] [tools...]
#
#
# Lookup examples from the `tldr` set, showing how to use command-line tools.
# When not given options to look into OS-specific entries, all entries are
# looked-up from the `common` set.
#
#
# Options, also available starting with double-dashes
#
#   -f        look only for freebsd-specific entries
#   -freebsd  look only for freebsd-specific entries
#
#   -h        show this help message
#   -help     show this help message
#
#   -l        look only for linux-specific entries
#   -linux    look only for linux-specific entries
#
#   -m        look only for macos-specific entries
#   -macos    look only for macos-specific entries
#
#   -o        look only for openbsd-specific entries
#   -openbsd  look only for openbsd-specific entries
#
#   -w        look only for windows-specific entries
#   -win      look only for windows-specific entries
#   -windows  look only for windows-specific entries


case "$1" in
    -h|--h|-help|--help)
        awk '/^# +tldr /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
        exit 0
    ;;
    -f|--f|-freebsd|--freebsd)
        kind="freebsd"
        shift
    ;;
    -l|--l|-linux|--linux)
        kind="linux"
        shift
    ;;
    -m|--m|-mac|--mac|-macos|--macos|-macosx|--macosx|-osx|--osx)
        kind="osx"
        shift
    ;;
    -o|--o|-openbsd|--openbsd)
        kind="openbsd"
        shift
    ;;
    -w|--w|-win|--win|-windows|--windows)
        kind="windows"
        shift
    ;;
    --) shift;;
    -*)
        kind="$(echo "$1" | sed -E 's/--?//')"
        shift
    ;;
esac

if [ $# -eq 0 ]; then
    awk '/^# +tldr /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
    exit 1
fi

base='https://raw.githubusercontent.com/tldr-pages/tldr/main/pages'
kind="${kind:-common}"

options="-MKiCRS"
if [ $# -eq 1 ]; then
    options="-MKiCRS --header=1"
fi

got=0
for arg in "$@"; do
    [ "${got}" -gt 0 ] && printf "\n"
    got=1

    if echo "${arg}" | grep -q -v / ; then
        arg="${kind}/${arg}"
    fi

    printf "\e[7m%-80s\e[0m\n" "${arg}"
    curl -s --show-error "${base}/${arg}.md" 2>&1 | awk '
        NR == 1 && /^404: / { printf "\x1b[38;2;204;0;0m%s\x1b[0m\n", $0; next }
        NR <= 2 || /^>/ { printf "\x1b[38;2;164;164;164m%s\x1b[0m\n", $0; next }
        /^`/ { printf "\x1b[48;2;224;224;224m%s\x1b[0m\n", $0; next }
        1
    '
done | less "${options}"