#! /usr/bin/env bb

; A utility to listen to your ebooks using TTS programs

(require '[babashka.process :as p]
         '[clojure.java.io :as io]
         '[clojure.string :refer [split]])

;; TODO Check if all required utilities are installed

;; TODO Allow voice selection
(println "Selected voice is Samantha")

;; TODO Use festival-tts or say depending on OS

(defn run-cmd
  [command]
  (->> command 
       p/process
       :out
       slurp))
       
(let [book-file (first *command-line-args*)
      title (first (split book-file #"\."))
      txtz-file (str title ".txtz")
      txt-file (str title ".txt")
      aiff-file (str title ".aiff")
      mp3-file (str title ".mp3")]
  (println "Converting to text...")
  (run-cmd ["ebook-convert" book-file txtz-file])
  (spit txt-file (run-cmd ["unzip" "-p" txtz-file "index.txt"]))
  (println "Converting text to audio. Don't hold your breath!")
  (run-cmd ["say" "-f" txt-file "-o" aiff-file])
  (println "Creating mp3 file...")
  (run-cmd ["ffmpeg" "-i" aiff-file mp3-file])
  (println "Cleaning up...")
  (doseq [temp-file [txtz-file txt-file aiff-file]]
    (io/delete-file temp-file))
  (println (str "Done! Check out " mp3-file)))