#! /usr/bin/env bash
#
# Author: Ryan Greenup <ryan.greenup@protonmail.com>

# * Shell Settings
set -o errexit  # abort on nonzero exitstatus
set -o nounset  # abort on unbound variable
set -o pipefail # don't hide errors within pipes

# * Main Function
main() {
    setVars
    arguments  "${@}"
    SkimAndGrep

}

# ** Helper Functions
# *** Skim and Grep, the important stuff
SkimAndGrep () {

    command -v xclip >/dev/null 2>&1 || { echo >&2 "I require xclip but it's not installed. Install it with something like pacman -S xclip  Aborting."; exit 1; }
    command -v rg >/dev/null 2>&1 || { echo >&2 "I require ripgrep, with the binary rg in the path, but it's not installed, install it with ~cargo install rg~.  Aborting."; exit 1; }
    command -v mdcat >/dev/null 2>&1 || { echo >&2 "I require mdcat but it's not installed. Install it with ~cargo install mdcat~  Aborting."; exit 1; }
    command -v sk >/dev/null 2>&1 || { echo >&2 "I require skim, with the binary sk in the path, but it's not installed. Install it with ~cargo install skim~  Aborting."; exit 1; }

    ## If using fish, cleverness can be utilised to highlight matches.
    ## fish only, not zsh or bash
    ##

    if [[ "$(basename $SHELL)" == "fish" ]]; then

        ramtmp="$(mktemp -p /dev/shm/)"
        sk -c "echo {} > "${ramtmp}" ; rg -t markdown -l --ignore-case (cat "${ramtmp}")" \
            --preview "mdcat {} 2> /dev/null | \
                            rg -t markdown --colors 'match:bg:yellow' \
                            --no-line-number --ignore-case --pretty --context 20 (cat "${ramtmp}")" \
                            --bind 'ctrl-f:interactive,pgup:preview-page-up,pgdn:preview-page-down' \
                            --bind 'ctrl-w:execute-silent(echo {} | xargs realpath | xclip -selection clipboard),alt-w:execute-silent(echo {} | xclip -selection clipboard)' \
                            --bind 'alt-v:execute-silent(code {}),alt-e:execute-silent(emacs {}),ctrl-o:execute-silent(xdg-open {})' \
                            --bind 'alt-y:execute-silent(cat {} | xclip -selection clipboard)' \
                            --bind 'alt-o:execute-silent(cat {} | pandoc -f markdown -t html --mathml | xclip -selection clipboard)' \
                            --bind 'alt-f:execute-silent(echo {} | xargs dirname | xargs cd; cat {} | pandoc -f markdown -t dokuwiki --mathml | xclip -selection clipboard)' \
            ## TODO This should be emacsclient
            ## TODO This should be emacsclient
            ## Add -i to make it interactive from the start
            ## C-q toggles interactive
            ## C-y Copies Full path to clipboard
            exit 0

    else

        sk --ansi -c 'rg -l -t markdown --ignore-case "{}"' --preview "mdcat {}" \
                            --bind 'ctrl-f:interactive,pgup:preview-page-up,pgdn:preview-page-down,ctrl-w:execute-silent(echo {} | xargs realpath | xclip -selection clipboard),alt-w:execute-silent(echo {} | xclip -selection clipboard)'
                            --bind 'ctrl-f:interactive,pgup:preview-page-up,pgdn:preview-page-down' \
                            --bind 'ctrl-w:execute-silent(echo {} | xargs realpath | xclip -selection clipboard),alt-w:execute-silent(echo {} | xclip -selection clipboard)' \
                            --bind 'alt-v:execute-silent(code {}),alt-e:execute-silent(emacs {}),ctrl-o:execute-silent(xdg-open {})' \
                            --bind 'alt-p:execute-silent(marktext {} 2> /dev/null)'

    fi



}

#
#
# *** Set variables almost globally
setVars () {
    readonly script_name=$(basename "${0}")
    readonly script_dir=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
    IFS=$'\t\n'   # Split on newlines and tabs (but not on spaces)
}

## *** Interpret arguments
arguments () {
    while test $# -gt 0
    do
        case "$1" in
            --help) Help
                ;;
            -h) Help
                ;;
            --*) echo "bad option $1 in "${script_name}""
                ;;
            *) echo -e "argument \e[1;35m${1}\e[0m has no definition."
                ;;
        esac
        shift
    done
}

## *** Print Help

Help () {


    echo
    echo -e "    \e[3m\e[1m    NoteFind.sh \e[0m; Helpful Shell Scripts for Markdown Notes"
    echo -e "    \e[1;31m -------------------------\e[0m "
    echo

    echo -e "        \e[1;91m    \e[1m Binding \e[0m\e[0m \e[1;34m┊┊┊ \e[0m Description "
    echo -e "        ..............\e[1;34m┊┊┊\e[0m........................................... "
    echo -e "        \e[1;93m Ctrl - w \e[0m \e[1;34m   ┊┊┊ \e[0m Copy the Full Path to the Clipboard"
    echo -e "        \e[1;93m Alt  - w \e[0m \e[1;34m   ┊┊┊ \e[0m Copy the Relative Path to the Clipboard"
    echo -e "        \e[1;32m Alt  - e \e[0m \e[1;34m   ┊┊┊ \e[0m Open in Emacs"
    echo -e "        \e[1;32m Alt  - v \e[0m \e[1;34m   ┊┊┊ \e[0m Open in VSCode"
    echo -e "        \e[1;32m Ctrl - o \e[0m \e[1;34m   ┊┊┊ \e[0m Open in Default Program"
    echo -e "        \e[1;33m Ctrl - q \e[0m \e[1;34m   ┊┊┊ \e[0m Toggle Searching with ripgrep"

    echo

    echo -e "    \e[3m\e[1m• Compatability \e[0m "
    echo
    echo -e "        This uses \e[1mtmpfs\e[0m at \e[1m /dev/shm\e[0m, this should work on \e[3mArch\e[0m, \e[3mFedora\e[0m and \e[3mUbuntu\e[0m, I don't know about  \e[3mMacOS\e[0m "
    echo
        exit 0
}

## * Call Main Function
main "${@}"