#!/usr/bin/env bash

usage() {
    cat <<EOF
usage $0 [-d|r][-f][-h]
  -d, --daily       get the QOTD
  -r, --random      get a random quote
  -p, --pager       use pager to prevent quitting until keypress
  -f, --force       force update the quote pool
  -h, --help        display this message
EOF
}

API="https://zenquotes.io/api"
WORKING_DIR="$HOME/.local/share/quotes"

# create directory on fresh installs
if [ ! -d "$WORKING_DIR" ] ; then
    mkdir -p "$WORKING_DIR"
fi

cd "$WORKING_DIR"

daily() {
    TODAY=$(date +%m-%d)

    if [ ! -f "daily_$TODAY.json" ] ; then
        # prevent multiple requests per day
        rm daily_*.json
        curl -fs "$API/today" | gojq '.[0]' > "daily_$TODAY.json"
    fi

    cat "daily_$TODAY.json"
}

random() { 
    # have to be careful not to exceed 10 requests per minute
    curl -fs "$API/random" | gojq '.[0]'
}

get_quote() {
    if [ "$1" == "today" ] ; then
        daily
    elif [ "$1" == "random" ] ; then
        random
    else
        if [[ ! -f "quotes.json" || "$UPDATE" == true ]] ; then
            # update quotes file
            curl -fs "$API/quotes" > quotes.json
        fi

        num=$(($RANDOM % 49)) 
        cat quotes.json | gojq ".[$num]"
    fi
}

# parse long form
for arg in "$@"; do
    shift
    case "$arg" in
        '--help')       set -- "$@" '-h'    ;;
        '--random')     set -- "$@" '-r'    ;;
        '--daily')      set -- "$@" '-d'    ;;
        '--pager')      set -- "$@" '-p'    ;;
        '--force')      set -- "$@" '-f'    ;;
        *)              set -- "$@" "$arg"  ;;
    esac
done

# parse args
while getopts "hrdfp" opt ; do
    case "$opt" in
        'h')
            usage
            exit 0
            ;;
        'r')
            [ -n "$TYPE" ] && usage 1 || TYPE="random"
            ;;
        'd')
            [ -n "$TYPE" ] && usage 1 || TYPE="today"
            ;;
        'f')
            UPDATE=true
            ;;
        'p')
            PAGE=true
            ;;
        '?')
            usage
            exit 1
            ;;
    esac
done

QUOTE=$(get_quote "$TYPE")

Q=$(echo "$QUOTE" | gojq '.q' | tr -d '"')
A=$(echo "$QUOTE" | gojq '.a' | tr -d '"')

if [ -n "$PAGE" ] ; then
    printf '"%s" - %s\n' "$Q" "$A" | $PAGER
else
    printf '"%s" - %s\n' "$Q" "$A"
fi