import { BoundingRectangle } from "../../Source/Cesium.js";
import { Cartesian3 } from "../../Source/Cesium.js";
import { Cartesian4 } from "../../Source/Cesium.js";
import { EncodedCartesian3 } from "../../Source/Cesium.js";
import createCamera from "../createCamera.js";
import createContext from "../createContext.js";
import createFrameState from "../createFrameState.js";

describe(
  "Renderer/BuiltinFunctions",
  function () {
    var context;

    beforeAll(function () {
      context = createContext();
    });

    afterAll(function () {
      context.destroyForSpecs();
    });

    it("has czm_transpose (2x2)", function () {
      var fs =
        "void main() { " +
        "  mat2 m = mat2(1.0, 2.0, 3.0, 4.0); " +
        "  mat2 mt = mat2(1.0, 3.0, 2.0, 4.0); " +
        "  gl_FragColor = vec4(czm_transpose(m) == mt); " +
        "}";

      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has czm_transpose (3x3)", function () {
      var fs =
        "void main() { " +
        "  mat3 m = mat3(1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0); " +
        "  mat3 mt = mat3(1.0, 4.0, 7.0, 2.0, 5.0, 8.0, 3.0, 6.0, 9.0); " +
        "  gl_FragColor = vec4(czm_transpose(m) == mt); " +
        "}";

      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has czm_transpose (4x4)", function () {
      var fs =
        "void main() { " +
        "  mat4 m = mat4(1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0, 13.0, 14.0, 15.0, 16.0);" +
        "  mat4 mt = mat4(1.0, 5.0, 9.0, 13.0, 2.0, 6.0, 10.0, 14.0, 3.0, 7.0, 11.0, 15.0, 4.0, 8.0, 12.0, 16.0);" +
        "  gl_FragColor = vec4(czm_transpose(m) == mt); " +
        "}";

      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has czm_eyeToWindowCoordinates", function () {
      var camera = createCamera();
      camera.frustum.near = 1.0;

      var canvas = context.canvas;
      var width = canvas.clientWidth;
      var height = canvas.clientHeight;
      var vp = new BoundingRectangle(0.0, 0.0, width, height);
      context.uniformState.viewport = vp;
      context.uniformState.update(createFrameState(context, camera));

      var fs =
        "void main() { " +
        "  float z = czm_projection[3][2] / czm_projection[2][2];" +
        "  float x = z / czm_projection[0][0];" +
        "  float y = z / czm_projection[1][1];" +
        "  vec4 pointEC = vec4(x, y, z, 1.0);" +
        "  vec2 fragCoord = vec2(0.0, 0.0);" +
        "  vec4 actual = czm_eyeToWindowCoordinates(pointEC);" +
        "  vec2 diff = actual.xy - fragCoord;" +
        "  gl_FragColor = vec4(all(lessThan(diff, vec2(czm_epsilon6))));" +
        "}";

      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has czm_windowToEyeCoordinates", function () {
      var camera = createCamera();
      camera.frustum.near = 1.0;

      var canvas = context.canvas;
      var width = canvas.clientWidth;
      var height = canvas.clientHeight;
      var vp = new BoundingRectangle(0.0, 0.0, width, height);
      context.uniformState.viewport = vp;
      context.uniformState.update(createFrameState(context, camera));

      var fs =
        "void main() { " +
        "  float z = czm_projection[3][2] / czm_projection[2][2];" +
        "  float x = z / czm_projection[0][0];" +
        "  float y = z / czm_projection[1][1];" +
        "  vec3 pointEC = vec3(x, y, z);" +
        "  vec4 fragCoord = vec4(0.0, 0.0, 0.0, -z);" +
        "  vec4 actual = czm_windowToEyeCoordinates(fragCoord);" +
        "  vec3 diff = actual.xyz - pointEC;" +
        "  gl_FragColor = vec4(all(lessThan(diff, vec3(czm_epsilon6))));" +
        "}";

      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();

      fs =
        "void main() { " +
        "  float z = czm_projection[3][2] / czm_projection[2][2];" +
        "  float x = z / czm_projection[0][0];" +
        "  float y = z / czm_projection[1][1];" +
        "  vec3 pointEC = vec3(x, y, z);" +
        "  vec4 actual = czm_windowToEyeCoordinates(vec2(0.0, 0.0), 0.0);" +
        "  vec3 diff = actual.xyz - pointEC;" +
        "  gl_FragColor = vec4(all(lessThan(diff, vec3(czm_epsilon6))));" +
        "}";

      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has czm_planeDistance", function () {
      var fs =
        "void main() { " +
        "  vec4 plane = vec4(1.0, 0.0, 0.0, 0.0); " +
        "  vec3 point = vec3(1.0, 0.0, 0.0); " +
        "  float expected = 1.0; " +
        "  float actual = czm_planeDistance(plane, point); " +
        "  gl_FragColor = vec4(actual == expected); " +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();

      fs =
        "void main() { " +
        "  vec4 plane = vec4(1.0, 0.0, 0.0, 0.0); " +
        "  vec3 point = vec3(1.0, 0.0, 0.0); " +
        "  float expected = 1.0; " +
        "  float actual = czm_planeDistance(plane.xyz, plane.w, point); " +
        "  gl_FragColor = vec4(actual == expected); " +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has czm_lineDistance", function () {
      var fs =
        "void main() { " +
        "  vec2 point1 = vec2(0.0, 0.0); " +
        "  vec2 point2 = vec2(1.0, 0.0); " +
        "  vec2 point = vec2(0.5, 1.0); " +
        "  float expected = 1.0; " +
        "  float actual = czm_lineDistance(point1, point2, point); " +
        "  gl_FragColor = vec4(actual == expected); " +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has czm_tangentToEyeSpaceMatrix", function () {
      var fs =
        "void main() { " +
        "  vec3 tangent = vec3(1.0, 0.0, 0.0); " +
        "  vec3 bitangent = vec3(0.0, 1.0, 0.0); " +
        "  vec3 normal = vec3(0.0, 0.0, 1.0); " +
        "  mat3 expected = mat3(1.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 1.0); " +
        "  mat3 actual = czm_tangentToEyeSpaceMatrix(normal, tangent, bitangent); " +
        "  gl_FragColor = vec4(actual == expected); " +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has czm_translateRelativeToEye", function () {
      var camera = createCamera({
        offset: new Cartesian3(1.0, 2.0, 3.0),
      });
      context.uniformState.update(createFrameState(context, camera));

      var p = new Cartesian3(6.0, 5.0, 4.0);
      var encoded = EncodedCartesian3.fromCartesian(p);

      var uniformMap = {
        u_high: function () {
          return encoded.high;
        },
        u_low: function () {
          return encoded.low;
        },
      };

      var fs =
        "uniform vec3 u_high;" +
        "uniform vec3 u_low;" +
        "void main() { " +
        "  vec4 p = czm_translateRelativeToEye(u_high, u_low);" +
        "  gl_FragColor = vec4(p == vec4(5.0, 3.0, 1.0, 1.0)); " +
        "}";

      expect({
        context: context,
        fragmentShader: fs,
        uniformMap: uniformMap,
      }).contextToRender();
    });

    it("has czm_antialias", function () {
      var fs =
        "void main() {" +
        "  vec4 color0 = vec4(1.0, 0.0, 0.0, 1.0);" +
        "  vec4 color1 = vec4(0.0, 1.0, 0.0, 1.0);" +
        "  vec4 result = czm_antialias(color0, color1, color1, 0.5);" +
        " gl_FragColor = vec4(result == color1);" +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("czm_pointAlongRay: point at ray origin", function () {
      var fs =
        "void main() { " +
        "  gl_FragColor = vec4(czm_pointAlongRay(czm_ray(vec3(0.0), vec3(1.0, 0.0, 0.0)), 0.0) == vec3(0.0)); " +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("czm_pointAlongRay: point in front of ray origin", function () {
      var fs =
        "void main() { " +
        "  gl_FragColor = vec4(czm_pointAlongRay(czm_ray(vec3(0.0), vec3(1.0, 0.0, 0.0)), 2.0) == vec3(2.0, 0.0, 0.0)); " +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("czm_pointAlongRay: point behind ray origin", function () {
      var fs =
        "void main() { " +
        "  gl_FragColor = vec4(czm_pointAlongRay(czm_ray(vec3(0.0), vec3(0.0, 1.0, 0.0)), -2.0) == vec3(0.0, -2.0, 0.0)); " +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has czm_octDecode(vec2)", function () {
      var fs =
        "void main() { " +
        "  gl_FragColor = vec4(all(lessThanEqual(abs(czm_octDecode(vec2(128.0, 128.0)) - vec3(0.0, 0.0, 1.0)), vec3(0.01)))); " +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has czm_octDecode(float)", function () {
      var fs =
        "void main() { " +
        "  gl_FragColor = vec4(all(lessThanEqual(abs(czm_octDecode(32896.0) - vec3(0.0, 0.0, 1.0)), vec3(0.01)))); " +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has czm_octDecode(vec2, vec3, vec3, vec3)", function () {
      var fs =
        "void main() { " +
        "  vec3 a, b, c;" +
        "  czm_octDecode(vec2(8454016.0, 8421631.0), a, b, c);" +
        "  bool decoded = all(lessThanEqual(abs(a - vec3(1.0, 0.0, 0.0)), vec3(0.01)));" +
        "  decoded = decoded && all(lessThanEqual(abs(b - vec3(0.0, 1.0, 0.0)), vec3(0.01)));" +
        "  decoded = decoded && all(lessThanEqual(abs(c - vec3(0.0, 0.0, 1.0)), vec3(0.01)));" +
        "  gl_FragColor = vec4(decoded);" +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has czm_decompressTextureCoordinates", function () {
      var fs =
        "void main() { " +
        "  gl_FragColor = vec4(czm_decompressTextureCoordinates(8386559.0) == vec2(0.4998779, 0.4998779)); " +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has signNotZero : float", function () {
      var fs =
        "void main() { " +
        "  gl_FragColor = vec4(czm_signNotZero(0.0) == 1.0, " +
        "                      czm_signNotZero(5.0) == 1.0, " +
        "                      czm_signNotZero(-5.0) == -1.0, 1.0); " +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has signNotZero : vec2", function () {
      var fs =
        "void main() { " +
        "  gl_FragColor = vec4(czm_signNotZero(vec2(0.0, 0.0)) == vec2(1.0, 1.0), " +
        "                      czm_signNotZero(vec2(1.0, 1.0)) == vec2(1.0, 1.0), " +
        "                      czm_signNotZero(vec2(-1.0, -1.0)) == vec2(-1.0, -1.0), " +
        "                      czm_signNotZero(vec2(-1.0, 0.0)) == vec2(-1.0, 1.0)); " +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has signNotZero : vec3", function () {
      var fs =
        "void main() { " +
        "  gl_FragColor = vec4(czm_signNotZero(vec3(0.0, 0.0, 0.0)) == vec3(1.0, 1.0, 1.0), " +
        "                      czm_signNotZero(vec3(1.0, 1.0, 1.0)) == vec3(1.0, 1.0, 1.0), " +
        "                      czm_signNotZero(vec3(-1.0, -1.0, -1.0)) == vec3(-1.0, -1.0, -1.0), " +
        "                      czm_signNotZero(vec3(-1.0, 0.0, 1.0)) == vec3(-1.0, 1.0, 1.0)); " +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has signNotZero : vec4", function () {
      var fs =
        "void main() { " +
        "  gl_FragColor = vec4(czm_signNotZero(vec4(0.0, 0.0, 0.0, 0.0)) == vec4(1.0), " +
        "                      czm_signNotZero(vec4(1.0, 1.0, 1.0, 1.0)) == vec4(1.0), " +
        "                      czm_signNotZero(vec4(-1.0, -1.0, -1.0, -1.0)) == vec4(-1.0), " +
        "                      czm_signNotZero(vec4(-1.0, 0.0, 1.0, -10.0)) == vec4(-1.0, 1.0, 1.0, -1.0)); " +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has czm_cosineAndSine in all 4 quadrants", function () {
      var fs =
        "bool isBounded(float value, float min, float max) { " +
        "  return ((value < max) && (value > min)); " +
        "}" +
        "void main() { " +
        "  gl_FragColor = vec4(isBounded(czm_cosineAndSine(czm_piOverFour).x, 0.707106, 0.707107) && isBounded(czm_cosineAndSine(czm_piOverFour).y, 0.707106, 0.707107), " +
        "                      isBounded(czm_cosineAndSine(czm_pi - czm_piOverFour).x, -0.707107, -0.707106) && isBounded(czm_cosineAndSine(czm_pi - czm_piOverFour).y, 0.707106, 0.707107), " +
        "                      isBounded(czm_cosineAndSine(-czm_piOverFour).x, 0.707106, 0.707107) && isBounded(czm_cosineAndSine(-czm_piOverFour).y, -0.707107, -0.707106), " +
        "                      isBounded(czm_cosineAndSine(-czm_pi + czm_piOverFour).x, -0.707107, -0.707106) && isBounded(czm_cosineAndSine(-czm_pi + czm_piOverFour).y, -0.707107, -0.707106)); " +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("can calculate nearFarScalar", function () {
      var fs =
        "vec4 testNearFarScalar = vec4(10.0, 1.0, 20.0, 0.0);" +
        "void main() { " +
        "  gl_FragColor = vec4(czm_nearFarScalar(testNearFarScalar, 5.0 * 5.0) == 1.0, " +
        "                      czm_nearFarScalar(testNearFarScalar, 10.0 * 10.0) == 1.0, " +
        "                      czm_nearFarScalar(testNearFarScalar, 20.0 * 20.0) == 0.0, " +
        "                      czm_nearFarScalar(testNearFarScalar, 50.0 * 50.0) == 0.0); " +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has czm_cascadeColor", function () {
      var fs =
        "void main() { " +
        "  gl_FragColor = vec4(all(equal(czm_cascadeColor(vec4(0.5)), vec4(1.0, 0.5, 1.0, 2.0))));" +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has czm_approximateSphericalCoordinates", function () {
      var fs =
        "void main() { " +
        "  gl_FragColor = vec4(all(equal(czm_approximateSphericalCoordinates(vec3(1.0, 0.0, 0.0)), vec2(0.0, 0.0))));" +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has czm_transformPlane", function () {
      var fs =
        "void main() { " +
        "  mat4 uniformScale2 = mat4(0.5, 0.0, 0.0, 0.0," +
        "                            0.0, 0.5, 0.0, 0.0," +
        "                            0.0, 0.0, 0.5, 0.0," +
        "                            0.0, 0.0, 0.0, 1.0);" +
        "  gl_FragColor = vec4(all(equal(czm_transformPlane(vec4(1.0, 0.0, 0.0, 10.0), uniformScale2), vec4(1.0, 0.0, 0.0, 20.0))));" +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has czm_unpackFloat", function () {
      var packed = Cartesian4.packFloat(1);
      packed = Cartesian4.divideByScalar(packed, 255, packed);
      var vec4 =
        "vec4(" +
        packed.x +
        ", " +
        packed.y +
        ", " +
        packed.z +
        ", " +
        packed.w +
        ")";
      var fs =
        "void main() { " +
        "  gl_FragColor = vec4(czm_unpackFloat(" +
        vec4 +
        "));" +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has czm_branchFreeTernary", function () {
      var fs =
        "void main() { " +
        "  gl_FragColor = vec4(czm_branchFreeTernary(true, 1.0, 0.0));" +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();

      fs =
        "void main() { " +
        "  gl_FragColor = vec4(czm_branchFreeTernary(true, vec2(1.0), vec2(0.0)), 1.0, 1.0);" +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();

      fs =
        "void main() { " +
        "  gl_FragColor = vec4(czm_branchFreeTernary(true, vec3(1.0), vec3(0.0)), 1.0);" +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();

      fs =
        "void main() { " +
        "  gl_FragColor = czm_branchFreeTernary(true, vec4(1.0), vec4(0.0));" +
        "}";
      expect({
        context: context,
        fragmentShader: fs,
      }).contextToRender();
    });

    it("has czm_fastApproximateAtan", function () {
      var fsAtan =
        "void main() { " +
        "  gl_FragColor = vec4(czm_fastApproximateAtan(0.0) == 0.0);" +
        "}";
      expect({
        context: context,
        fragmentShader: fsAtan,
      }).contextToRender();

      var fsAtan2 =
        "void main() { " +
        "  gl_FragColor = vec4(czm_fastApproximateAtan(1.0, 0.0) == 0.0);" +
        "}";
      expect({
        context: context,
        fragmentShader: fsAtan2,
      }).contextToRender();
    });
  },
  "WebGL"
);