#!/usr/bin/env sh
# shellcheck disable=SC3043,SC2034,SC1090

readonly CLI_LOCAL_PREVIEW_DIR="$CLI_PREVIEW_DIR/local"
readonly CLI_LOCAL_PREVIEW_SCRIPTS_DIR="$CLI_LOCAL_PREVIEW_DIR/scripts"
readonly CLI_LOCAL_PREVIEW_IMGS_DIR="$CLI_LOCAL_PREVIEW_DIR/imgs"

readonly CLI_STATE_CURRENT_PLAYLIST_FILE="$CLI_CURRENT_STATE_DIR/playlist.m3u8"
readonly CLI_STATE_CURRRENT_MEDIA_FILE="$CLI_CURRENT_STATE_DIR/media-playlist.m3u8"

mkdir -p "$CLI_LOCAL_PREVIEW_SCRIPTS_DIR" "$CLI_LOCAL_PREVIEW_IMGS_DIR"

_preview_local() {
  local hash
  local script_path
  local preview_txt
  local img_path
  local thumbnailer_input_file
  local base_dir
  local candidate_path
  local random_seek

  base_dir="$1"

  while IFS= read -r line; do
    case "$line" in
    "$TXT_MENU_BACK" | "$TXT_MENU_EXIT") printf '%s' "$line" ;;
    *)
      if [ "$CONFIG_ENABLE_PREVIEW" = "false" ]; then
        printf '%s' "$line"
      else
        __preview_fzf_create_shared_script

        hash="$(_util_generate_hash "$line")"
        script_path="$CLI_LOCAL_PREVIEW_SCRIPTS_DIR/$hash.sh"

        # preview image
        # TODO: move to function and separate rofi impl from fzf
        img_path="$CLI_LOCAL_PREVIEW_IMGS_DIR/$hash.jpg"

        candidate_path="$CONFIG_DOWNLOAD_DIR/$line"
        [ -n "$base_dir" ] && candidate_path="$base_dir/$line"

        if [ -f "$candidate_path" ]; then
          thumbnailer_input_file="$candidate_path"
        else
          [ -n "$base_dir" ] && candidate_path="$base_dir"
          thumbnailer_input_file="$(find "$candidate_path" -type f 2>/dev/null | awk 'BEGIN{srand()} rand() * NR < 1 {line = $0} END {print line}')"
        fi

        if ! [ -s "$img_path" ]; then
          random_seek=$(od -An -N2 -i /dev/urandom | awk '{print ($1 % 100) + 1}')
          ffmpegthumbnailer -i "$thumbnailer_input_file" -o "$img_path" -t "$random_seek" -s 0 -m >/dev/null 2>&1
        fi

        case "$CONFIG_LAUNCHER" in
        fzf)
          if ! [ -s "$script_path" ]; then
            if [ -d "${base_dir:-$CONFIG_DOWNLOAD_DIR}/$line" ]; then
              preview_txt="$(find "${base_dir:-$CONFIG_DOWNLOAD_DIR}/$line" -type f)"
            else
              if command -v 'ffprobe' >/dev/null 2>&1; then
                preview_txt="$(ffprobe "${base_dir:-$CONFIG_DOWNLOAD_DIR}/$line" -hide_banner 2>&1)"
              fi
            fi
            cat <<EOF >"$script_path"
if [ -s "$CLI_FZF_PREVIEW_SCRIPT" ];then
  . "$CLI_FZF_PREVIEW_SCRIPT"
else
  exit
fi
[ -s "$img_path" ] && fzf_preview "$img_path" 2>/dev/null

draw_divider

printf "%s" "$preview_txt"|fold -s -w "\$FZF_PREVIEW_COLUMNS"
EOF
          fi
          printf "%s|%s\n" "$script_path" "$line"
          ;;
        rofi)
          printf "%s\0icon\x1f%s\n" "$line" "$img_path"
          ;;
        *)
          printf '%s' "$line\n"
          ;;
        esac
      fi
      ;;
    esac
  done
}

_menu_media_actions() {
  local action
  local actions
  actions="\
${THEME_FZF_ICON_COLOR_PRIMARY}${THEME_RESET}  ${TXT_MENU_MEDIA_ACTIONS_WATCH}
${THEME_FZF_ICON_COLOR_PRIMARY}${THEME_RESET}  ${TXT_MENU_MEDIA_ACTIONS_WATCH_ALL}
${THEME_FZF_ICON_COLOR_PRIMARY}󰎆${THEME_RESET}  ${TXT_MENU_MEDIA_ACTIONS_LISTEN}
${THEME_FZF_ICON_COLOR_PRIMARY}${THEME_RESET}  ${TXT_MENU_MEDIA_ACTIONS_LISTEN_ALL}
${THEME_FZF_ICON_COLOR_PRIMARY}󰌍${THEME_RESET}  ${TXT_MENU_BACK}
${THEME_FZF_ICON_COLOR_ERROR}󰈆${THEME_RESET}  ${TXT_MENU_EXIT}"

  while true; do
    if [ -n "$CMD_MEDIA_ACTION" ]; then
      action="$CMD_MEDIA_ACTION"
      unset -v CMD_MEDIA_ACTION
    else
      action=$(printf "%s" "$actions" | ui_launcher "$TXT_MENU_PLAYLIST_PROMPT_ACTION" | sed 's/.  //g')
    fi

    case "$action" in
    "$TXT_MENU_MEDIA_ACTIONS_WATCH")
      play "$CLI_STATE_CURRRENT_MEDIA_FILE"
      ;;
    "$TXT_MENU_MEDIA_ACTIONS_WATCH_ALL")
      play "$CLI_STATE_CURRENT_PLAYLIST_FILE"
      ;;
    "$TXT_MENU_MEDIA_ACTIONS_LISTEN")
      play "$CLI_STATE_CURRRENT_MEDIA_FILE" "listen"
      ;;
    "$TXT_MENU_MEDIA_ACTIONS_LISTEN_ALL")
      play "$CLI_STATE_CURRENT_PLAYLIST_FILE" "listen"
      ;;
    "$TXT_MENU_BACK" | "") break ;;
    "$TXT_MENU_EXIT") _util_byebye ;;
    *) ui_notify_critical "${TXT_MENU_INVALID_ACTION}: $action" ;;
    esac
    if [ "$CMD_MEDIA_EXIT" = true ]; then
      _util_byebye
    fi
  done
}

_menu_search() {
  local media_items

  while true; do
    media_items=$(
      printf "%s\n%s" "$(find "$CONFIG_DOWNLOAD_DIR" -type f | sort | tee "$CLI_STATE_CURRENT_PLAYLIST_FILE")" "$TXT_MENU_BACK" |
        sed "s|$CONFIG_DOWNLOAD_DIR/||g" |
        _preview_local "" |
        ui_launcher_with_preview "$TXT_MENU_MAIN_SEARCH_PROMPT" "multi"
    )

    case "$media_items" in
    "$TXT_MENU_BACK" | "") break ;;
    *)
      printf "%s" "$media_items" | awk -F '\n' "{print \"$CONFIG_DOWNLOAD_DIR/\" \$1}" >"$CLI_STATE_CURRRENT_MEDIA_FILE"
      _menu_media_actions
      ;;
    esac
  done
}

_menu_playlists() {
  local media_items
  local playlist

  while true; do
    # TODO: allow multiple playlist selection
    playlist=$(
      printf "%s\n%s" "$(find "$CONFIG_DOWNLOAD_DIR" -maxdepth 2 -mindepth 2 -type d | sort)" "$TXT_MENU_BACK" |
        sed "s|$CONFIG_DOWNLOAD_DIR/||g" |
        _preview_local |
        ui_launcher_with_preview "$TXT_MENU_MAIN_CHANNELS_PROMPT"
    )

    case "$playlist" in
    "$TXT_MENU_BACK" | "") break ;;
    *)
      while true; do
        media_items=$(
          printf "%s\n%s" "$(find "$CONFIG_DOWNLOAD_DIR/$playlist" -type f | sort | tee "$CLI_STATE_CURRENT_PLAYLIST_FILE")" "$TXT_MENU_BACK" |
            sed "s|$CONFIG_DOWNLOAD_DIR/$playlist/||g" |
            _preview_local "$CONFIG_DOWNLOAD_DIR/$playlist" |
            ui_launcher_with_preview "$TXT_MENU_MAIN_SEARCH_PROMPT" "multi"
        )

        case "$media_items" in
        "$TXT_MENU_BACK" | "") break ;;
        *)
          printf "%s" "$media_items" | awk -F '\n' "{print \"$CONFIG_DOWNLOAD_DIR/$playlist/\" \$1}" >"$CLI_STATE_CURRRENT_MEDIA_FILE"
          _menu_media_actions
          ;;
        esac
      done
      ;;
    esac
  done
}

_menu_channels() {
  local media_items
  local channel

  while true; do
    # TODO: allow multiple channel selection
    channel=$(
      printf "%s\n%s" "$(find "$CONFIG_DOWNLOAD_DIR" -maxdepth 3 -mindepth 3 -type d | sort)" "$TXT_MENU_BACK" |
        sed "s|$CONFIG_DOWNLOAD_DIR/||g" |
        _preview_local |
        ui_launcher_with_preview "$TXT_MENU_MAIN_CHANNELS_PROMPT"
    )

    case "$channel" in
    "$TXT_MENU_BACK" | "") break ;;
    *)
      while true; do
        media_items=$(
          printf "%s\n%s" "$(find "$CONFIG_DOWNLOAD_DIR/$channel" -type f | sort | tee "$CLI_STATE_CURRENT_PLAYLIST_FILE")" "$TXT_MENU_BACK" |
            sed "s|$CONFIG_DOWNLOAD_DIR/$channel/||g" |
            _preview_local "$CONFIG_DOWNLOAD_DIR/$channel" |
            ui_launcher_with_preview "$TXT_MENU_MAIN_SEARCH_PROMPT" "multi"
        )

        case "$media_items" in
        "$TXT_MENU_BACK" | "") break ;;
        *)
          printf "%s" "$media_items" | awk -F '\n' "{print \"$CONFIG_DOWNLOAD_DIR/$channel/\" \$1}" >"$CLI_STATE_CURRRENT_MEDIA_FILE"
          _menu_media_actions
          ;;
        esac
      done
      ;;
    esac
  done
}

_menu_main() {
  local actions
  local action

  actions="\
${THEME_FZF_ICON_COLOR_PRIMARY}${THEME_RESET}  ${TXT_MENU_MAIN_SEARCH}
${THEME_FZF_ICON_COLOR_PRIMARY}󰐑${THEME_RESET}  ${TXT_MENU_MAIN_PLAYLISTS}
${THEME_FZF_ICON_COLOR_PRIMARY}󰑈${THEME_RESET}  ${TXT_MENU_MAIN_CHANNELS}
${THEME_FZF_ICON_COLOR_ERROR}󰈆${THEME_RESET}  ${TXT_MENU_EXIT}"

  while true; do
    if [ -n "$CMD_MAIN_ACTION" ]; then
      action="$CMD_MAIN_ACTION"
      unset -v CMD_MAIN_ACTION
    else
      action="$(printf "%s" "$actions" | ui_launcher "$TXT_MENU_MAIN_PROMPT_ACTION" | sed 's/^.  //g')"
    fi

    case "$action" in
    "$TXT_MENU_MAIN_SEARCH") _menu_search ;;
    "$TXT_MENU_MAIN_PLAYLISTS") _menu_playlists ;;
    "$TXT_MENU_MAIN_CHANNELS") _menu_channels ;;
    "$TXT_MENU_EXIT" | "") _util_byebye ;;
    *) ui_notify_critical "$TXT_MENU_INVALID_ACTION" ;;
    esac

  done

}

menu_main() {
  if [ ! -d "$CONFIG_DOWNLOAD_DIR" ]; then
    ui_notify_critical "Downloads directory not found: $CONFIG_DOWNLOAD_DIR"
  fi
  _state_init
  _menu_main
}