#!/usr/bin/env bash
#  vim:ts=4:sts=4:sw=4:et
#
#  args: "My Shazam Tracks" | tee /dev/stderr | spotify_playlist_id_to_name.sh
#
#  Author: Hari Sekhon
#  Date: 2020-07-03 00:25:24 +0100 (Fri, 03 Jul 2020)
#
#  https://github.com/harisekhon/bash-tools
#
#  License: see accompanying Hari Sekhon LICENSE file
#
#  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
#
#  https://www.linkedin.com/in/harisekhon
#

set -euo pipefail
[ -n "${DEBUG:-}" ] && set -x
srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# shellcheck disable=SC1090
. "$srcdir/lib/spotify.sh"

# shellcheck disable=SC2034,SC2154
usage_description="
Uses Spotify API to translate a Spotify public playlist name to ID

Returns the ID for first playlist in your account which name contains the given playlist name (case insensitive substring match for convenience)

If you want an exact full string match of the playlist name to guarantee you get the right playlist ID, then export SPOTIFY_PLAYLIST_EXACT_MATCH=1

If a Spotify playlist ID is given, returns it as is (this is for coding convenience when calling from other scripts)

Needed by several other adjacent spotify tools


$usage_playlist_help

$usage_auth_help
"

# used by usage() in lib/utils.sh
# shellcheck disable=SC2034
usage_args="<playlist> [<curl_options>]"

help_usage "$@"

#if is_mac; then
#    awk(){
#        command gawk "$@"
#    }
#fi

playlist_name_to_id(){
    local playlist_name="$1"
    shift || :
    # if it's not a playlist id, scan all playlists and take the ID of the first matching playlist name
    if [[ "$playlist_name" =~ ^[[:alnum:]]{22}$ ]]; then
        echo "$playlist_name"
    else
        # If we've auto-completed a playlist name from the filename, replace the unicode slashes with the real ones
        playlist_name="$("$srcdir/spotify_filename_to_playlist.sh" <<< "$playlist_name")"
        # works but could get needlessly complicated to escape all possible regex special chars, switching to partial string match instead
        #playlist_regex="${playlist_id//\//\\/}"
        #playlist_regex="${playlist_regex//\(/\\(}"
        #playlist_regex="${playlist_regex//\)/\\)}"
                       #awk "BEGIN{IGNORECASE=1} /${playlist_regex//\//\\/}/ {print \$1; exit}" || :)"
        playlist_id="$(SPOTIFY_PLAYLISTS_ALL=1 "$srcdir/spotify_playlists.sh" "$@" |
                        if [ "${SPOTIFY_PLAYLIST_EXACT_MATCH:-}" ]; then
                            # do not tr [:upper:] [:lower:] as this invalidates the ID which is case insensitive
                            # save last case sensitive setting, ignore return code which will error if not already set
                            last_nocasematch="$(shopt -p nocasematch || :)"
                            shopt -s nocasematch
                            while read -r id name; do
                                if [[ "$name" = "$playlist_name" ]]; then
                                   echo "$id"
                                   break
                                fi
                            done
                            # restore last case sensitive setting
                            eval "$last_nocasematch"
                        else
                            grep -Fi -m1 "$playlist_name" |
                            awk '{print $1}'
                        fi || :
        )"
        if is_blank "$playlist_id"; then
            echo "Error: failed to find playlist ID matching given playlist name '$playlist_name'" >&2
            exit 1
        fi
        echo "$playlist_id"
    fi
}

spotify_token

if [ $# -gt 0 ]; then
    playlist_name="$1"
    shift || :
    playlist_name_to_id "$playlist_name" "$@"
else
    while read -r playlist_name; do
        playlist_name_to_id "$playlist_name" "$@"
    done
fi