(ns uxbox.util.geom-tests
  (:require [cljs.test :as t :include-macros true]
            [cljs.pprint :refer (pprint)]
            [uxbox.util.geom.point :as gpt]
            [uxbox.util.geom.matrix :as gmt]))

(t/deftest point-constructors-test
  (let [p (gpt/point 1 2)]
    (t/is (= (:x p) 1))
    (t/is (= (:y p) 2))
    (t/is (gpt/point? p)))

  (let [p (gpt/point 1)]
    (t/is (= (:x p) 1))
    (t/is (= (:y p) 1)))

  (let [p (gpt/point)]
    (t/is (= (:x p) 0))
    (t/is (= (:y p) 0)))

  (let [p (gpt/point [1 2])]
    (t/is (= (:x p) 1))
    (t/is (= (:y p) 2))))

(t/deftest point-rotate-test
  (let [p1 (gpt/point 10 0)
        p2 (gpt/rotate p1 90)]
    (t/is (= (:x p2) 0))
    (t/is (= (:y p2) 10))
    (t/is (gpt/point? p2))))

(t/deftest point-add-test
  (let [p1 (gpt/point 1 1)
        p2 (gpt/point 2 2)
        p3 (gpt/add p1 p2)]
    (t/is (= (:x p3) 3))
    (t/is (= (:y p3) 3))
    (t/is (gpt/point? p3))))

(t/deftest point-substract-test
  (let [p1 (gpt/point 3 3)
        p2 (gpt/point 2 2)
        p3 (gpt/substract p1 p2)]
    (t/is (= (:x p3) 1))
    (t/is (= (:y p3) 1))
    (t/is (gpt/point? p3))))

(t/deftest point-distance-test
  (let [p1 (gpt/point 0 0)
        p2 (gpt/point 10 0)
        d (gpt/distance p1 p2)]
    (t/is (number? d))
    (t/is (= d 10))))

(t/deftest point-length-test
  (let [p1 (gpt/point 10 0)
        ln (gpt/length p1)]
    (t/is (number? ln))
    (t/is (= ln 10))))

(t/deftest point-angle-test
  (let [p1 (gpt/point 0 10)
        angle (gpt/angle p1)]
    (t/is (number? angle))
    (t/is (= angle 90)))
  (let [p1 (gpt/point 0 10)
        p2 (gpt/point 10 10)
        angle (gpt/angle-with-other p1 p2)]
    (t/is (number? angle))
    (t/is (= angle 45))))

(t/deftest point-quadrant-test
  (let [p1 (gpt/point 10 10)
        p2 (gpt/point -10 10)
        p3 (gpt/point -10 -10)
        p4 (gpt/point 10 -10)]

    (t/is (= 1 (gpt/quadrant p1)))
    (t/is (= 2 (gpt/quadrant p2)))
    (t/is (= 3 (gpt/quadrant p3)))
    (t/is (= 4 (gpt/quadrant p4)))))


(t/deftest matrix-constructors-test
  (let [m (gmt/matrix)]
    (t/is (= @m [1 0 0 1 0 0]))
    (t/is (gmt/matrix? m)))
  (let [m (gmt/matrix 1 1 1 2 2 2)]
    (t/is (= @m [1 1 1 2 2 2]))
    (t/is (gmt/matrix? m)))
  (let [m (gmt/matrix [1 1 1 2 2 2])]
    (t/is (= @m [1 1 1 2 2 2]))
    (t/is (gmt/matrix? m))))

(t/deftest matrix-rotate-test
  (let [m (-> (gmt/matrix)
              (gmt/rotate 10))]

    (t/is (= @m [0.984807753012208
                 -0.17364817766693033
                 0.17364817766693033
                 0.984807753012208
                 0 0]))))

(t/deftest matrix-scale-test
  (let [m (-> (gmt/matrix)
              (gmt/scale 2))]
    (t/is (= @m [2 0 0 2 0 0]))))

(t/deftest matrix-translate-test
  (let [m (-> (gmt/matrix)
              (gmt/translate 2 10))]
    (t/is (= @m [1 0 0 1 2 10]))))