(ns ldview.tasks.images
  (:require [image-resizer.core :refer :all]
            [image-resizer.util :as utils]
            [image-resizer.format :refer :all]
            [image-resizer.crop :refer :all]
            [clojure.java.io :as io]
            [noir.io :as noir-io]))

(defn base-path
  ([] (str (noir-io/resource-path) "img"))
  ([competition-id] (str (base-path) "/ld" competition-id "/")))

(defn image-name [competition-id folder entry-id number]
  (str (base-path competition-id) folder "/" entry-id "_" number ".png"))

(defn to-square [file new-size]
  (let [[width height] (dimensions (utils/buffered-image file))]
    (if (< width height)
      (let [resized-img (resize-to-width file new-size)
            [w h] (dimensions resized-img)
            crop-margin (quot (- h new-size) 2)]
        (crop-from resized-img 0 crop-margin new-size new-size))
      (let [resized-img (resize-to-height file new-size)
            [w h] (dimensions resized-img)
            crop-margin (quot (- w new-size) 2)]
        (crop-from resized-img crop-margin 0 new-size new-size)))))

(defn sourceimage->thumb [image-path new-image-path]
  (with-redefs [image-resizer.fs/new-filename (fn [filepath dimensions] (str filepath))]
    (as-file (to-square (io/file image-path) 200) new-image-path)))

(defn sourceimage->fullscreen [image-path new-image-path]
  (with-redefs [image-resizer.fs/new-filename (fn [filepath dimensions] (str filepath))]
    (as-file (resize (io/file image-path) 800 600) new-image-path)))