import { IndexDatatype } from "../../Source/Cesium.js";
import { Buffer } from "../../Source/Cesium.js";
import { BufferUsage } from "../../Source/Cesium.js";
import createContext from "../createContext.js";

describe(
  "Renderer/Buffer",
  function () {
    createBufferSpecs({});
    var c = createContext({ requestWebgl2: true });
    // Don't repeat WebGL 1 tests when WebGL 2 is not supported
    if (c.webgl2) {
      createBufferSpecs({ requestWebgl2: true });
    }
    c.destroyForSpecs();

    function createBufferSpecs(contextOptions) {
      var context;
      var buffer;
      var buffer2;
      var webglMessage = contextOptions.requestWebgl2 ? ": WebGL 2" : "";

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

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

      afterEach(function () {
        if (buffer && !buffer.isDestroyed()) {
          buffer = buffer.destroy();
        }
        if (buffer2 && !buffer2.isDestroyed()) {
          buffer2 = buffer2.destroy();
        }
      });

      it(
        "throws when creating a vertex buffer with no context" + webglMessage,
        function () {
          expect(function () {
            buffer = Buffer.createVertexBuffer({
              sizeInBytes: 4,
              usage: BufferUsage.STATIC_DRAW,
            });
          }).toThrowDeveloperError();
        }
      );

      it(
        "throws when creating a vertex buffer with an invalid typed array" +
          webglMessage,
        function () {
          expect(function () {
            buffer = Buffer.createVertexBuffer({
              context: context,
              typedArray: {},
              usage: BufferUsage.STATIC_DRAW,
            });
          }).toThrowDeveloperError();
        }
      );

      it(
        "throws when creating a vertex buffer with both a typed array and size in bytes" +
          webglMessage,
        function () {
          expect(function () {
            buffer = Buffer.createVertexBuffer({
              context: context,
              typedArray: new Float32Array([0, 0, 0, 1]),
              sizeInBytes: 16,
              usage: BufferUsage.STATIC_DRAW,
            });
          }).toThrowDeveloperError();
        }
      );

      it(
        "throws when creating a vertex buffer without a typed array or size in bytes" +
          webglMessage,
        function () {
          expect(function () {
            buffer = Buffer.createVertexBuffer({
              context: context,
              usage: BufferUsage.STATIC_DRAW,
            });
          }).toThrowDeveloperError();
        }
      );

      it(
        "throws when creating a vertex buffer with invalid usage" +
          webglMessage,
        function () {
          expect(function () {
            buffer = Buffer.createVertexBuffer({
              context: context,
              sizeInBytes: 16,
              usage: 0,
            });
          }).toThrowDeveloperError();
        }
      );

      it(
        "throws when creating a vertex buffer with size of zero" + webglMessage,
        function () {
          expect(function () {
            buffer = Buffer.createVertexBuffer({
              context: context,
              sizeInBytes: 0,
              usage: BufferUsage.STATIC_DRAW,
            });
          }).toThrowDeveloperError();
        }
      );

      it("creates vertex buffer" + webglMessage, function () {
        buffer = Buffer.createVertexBuffer({
          context: context,
          sizeInBytes: 16,
          usage: BufferUsage.STATIC_DRAW,
        });

        expect(buffer.sizeInBytes).toEqual(16);
        expect(buffer.usage).toEqual(BufferUsage.STATIC_DRAW);
      });

      it("copies array to a vertex buffer" + webglMessage, function () {
        var sizeInBytes = 3 * Float32Array.BYTES_PER_ELEMENT;
        var vertices = new ArrayBuffer(sizeInBytes);
        var positions = new Float32Array(vertices);
        positions[0] = 1.0;
        positions[1] = 2.0;
        positions[2] = 3.0;

        buffer = Buffer.createVertexBuffer({
          context: context,
          sizeInBytes: sizeInBytes,
          usage: BufferUsage.STATIC_DRAW,
        });
        buffer.copyFromArrayView(vertices);
      });

      it(
        "can create a vertex buffer from a typed array" + webglMessage,
        function () {
          var typedArray = new Float32Array(3);
          typedArray[0] = 1.0;
          typedArray[1] = 2.0;
          typedArray[2] = 3.0;

          buffer = Buffer.createVertexBuffer({
            context: context,
            typedArray: typedArray,
            usage: BufferUsage.STATIC_DRAW,
          });
          expect(buffer.sizeInBytes).toEqual(typedArray.byteLength);
          expect(buffer.usage).toEqual(BufferUsage.STATIC_DRAW);
        }
      );

      it(
        "can create a vertex buffer from a size in bytes" + webglMessage,
        function () {
          buffer = Buffer.createVertexBuffer({
            context: context,
            sizeInBytes: 4,
            usage: BufferUsage.STATIC_DRAW,
          });
          expect(buffer.sizeInBytes).toEqual(4);
          expect(buffer.usage).toEqual(BufferUsage.STATIC_DRAW);
        }
      );

      it(
        "throws when creating an index buffer with no context" + webglMessage,
        function () {
          expect(function () {
            buffer = Buffer.createIndexBuffer({
              sizeInBytes: 4,
              usage: BufferUsage.STATIC_DRAW,
              indexDatatype: IndexDatatype.UNSIGNED_SHORT,
            });
          }).toThrowDeveloperError();
        }
      );

      it(
        "throws when creating an index buffer with an invalid typed array" +
          webglMessage,
        function () {
          expect(function () {
            buffer = Buffer.createIndexBuffer({
              context: context,
              typedArray: {},
              usage: BufferUsage.STATIC_DRAW,
              indexDatatype: IndexDatatype.UNSIGNED_SHORT,
            });
          }).toThrowDeveloperError();
        }
      );

      it(
        "throws when creating an index buffer with both a typed array and size in bytes" +
          webglMessage,
        function () {
          expect(function () {
            buffer = Buffer.createIndexBuffer({
              context: context,
              typedArray: new Uint16Array([0, 1, 2, 0, 2, 3]),
              sizeInBytes: 12,
              usage: BufferUsage.STATIC_DRAW,
              indexDatatype: IndexDatatype.UNSIGNED_SHORT,
            });
          }).toThrowDeveloperError();
        }
      );

      it(
        "throws when creating an index buffer without a typed array or size in bytes" +
          webglMessage,
        function () {
          expect(function () {
            buffer = Buffer.createIndexBuffer({
              context: context,
              usage: BufferUsage.STATIC_DRAW,
              indexDatatype: IndexDatatype.UNSIGNED_SHORT,
            });
          }).toThrowDeveloperError();
        }
      );

      it(
        "throws when creating an index buffer with invalid usage" +
          webglMessage,
        function () {
          expect(function () {
            buffer = Buffer.createIndexBuffer({
              context: context,
              sizeInBytes: 16,
              usage: "invalid",
              indexDatatype: IndexDatatype.UNSIGNED_SHORT,
            });
          }).toThrowDeveloperError();
        }
      );

      it(
        "throws when creating an index buffer with invalid index data type" +
          webglMessage,
        function () {
          expect(function () {
            buffer = Buffer.createIndexBuffer({
              context: context,
              sizeInBytes: 16,
              usage: BufferUsage.STATIC_DRAW,
              indexDatatype: "invalid",
            });
          }).toThrowDeveloperError();
        }
      );

      it(
        "throws when creating an index buffer with size of zero" + webglMessage,
        function () {
          expect(function () {
            buffer = Buffer.createIndexBuffer({
              context: context,
              sizeInBytes: 0,
              usage: BufferUsage.STATIC_DRAW,
              indexDatatype: IndexDatatype.UNSIGNED_SHORT,
            });
          }).toThrowDeveloperError();
        }
      );

      it("creates index buffer" + webglMessage, function () {
        buffer = Buffer.createIndexBuffer({
          context: context,
          sizeInBytes: 6,
          usage: BufferUsage.STREAM_DRAW,
          indexDatatype: IndexDatatype.UNSIGNED_SHORT,
        });

        expect(buffer.sizeInBytes).toEqual(6);
        expect(buffer.usage).toEqual(BufferUsage.STREAM_DRAW);

        expect(buffer.indexDatatype).toEqual(IndexDatatype.UNSIGNED_SHORT);
        expect(buffer.bytesPerIndex).toEqual(2);
        expect(buffer.numberOfIndices).toEqual(3);
      });

      it("copies array to an index buffer" + webglMessage, function () {
        var sizeInBytes = 3 * Uint16Array.BYTES_PER_ELEMENT;
        var elements = new ArrayBuffer(sizeInBytes);
        var indices = new Uint16Array(elements);
        indices[0] = 1;
        indices[1] = 2;
        indices[2] = 3;

        buffer = Buffer.createIndexBuffer({
          context: context,
          sizeInBytes: sizeInBytes,
          usage: BufferUsage.STATIC_DRAW,
          indexDatatype: IndexDatatype.UNSIGNED_SHORT,
        });
        buffer.copyFromArrayView(elements);
      });

      it(
        "can create an index buffer from a typed array" + webglMessage,
        function () {
          var typedArray = new Uint16Array(3);
          typedArray[0] = 1;
          typedArray[1] = 2;
          typedArray[2] = 3;

          buffer = Buffer.createIndexBuffer({
            context: context,
            typedArray: typedArray,
            usage: BufferUsage.STATIC_DRAW,
            indexDatatype: IndexDatatype.UNSIGNED_SHORT,
          });
          expect(buffer.sizeInBytes).toEqual(typedArray.byteLength);
          expect(buffer.usage).toEqual(BufferUsage.STATIC_DRAW);
          expect(buffer.indexDatatype).toEqual(IndexDatatype.UNSIGNED_SHORT);
        }
      );

      it(
        "can create an index buffer from a size in bytes" + webglMessage,
        function () {
          buffer = Buffer.createIndexBuffer({
            context: context,
            sizeInBytes: 6,
            usage: BufferUsage.STATIC_DRAW,
            indexDatatype: IndexDatatype.UNSIGNED_SHORT,
          });
          expect(buffer.sizeInBytes).toEqual(6);
          expect(buffer.usage).toEqual(BufferUsage.STATIC_DRAW);
          expect(buffer.indexDatatype).toEqual(IndexDatatype.UNSIGNED_SHORT);
        }
      );

      it("getBufferData throws without WebGL 2" + webglMessage, function () {
        if (context.webgl2) {
          return;
        }

        buffer = Buffer.createVertexBuffer({
          context: context,
          sizeInBytes: 4,
          usage: BufferUsage.STATIC_DRAW,
        });
        var array = new Uint8Array(4);

        expect(function () {
          buffer.getBufferData(array);
        }).toThrowDeveloperError();
      });

      it("getBufferData throws without arrayView" + webglMessage, function () {
        if (!context.webgl2) {
          return;
        }

        buffer = Buffer.createVertexBuffer({
          context: context,
          sizeInBytes: 4,
          usage: BufferUsage.STATIC_DRAW,
        });

        expect(function () {
          buffer.getBufferData(undefined);
        }).toThrowDeveloperError();
      });

      it(
        "getBufferData throws with invalid sourceOffset" + webglMessage,
        function () {
          if (!context.webgl2) {
            return;
          }

          buffer = Buffer.createVertexBuffer({
            context: context,
            sizeInBytes: 4,
            usage: BufferUsage.STATIC_DRAW,
          });
          var array = new Uint8Array(4);

          expect(function () {
            buffer.getBufferData(array, -1);
          }).toThrowDeveloperError();
          expect(function () {
            buffer.getBufferData(array, 5);
          }).toThrowDeveloperError();
        }
      );

      it(
        "getBufferData throws with invalid destinationOffset" + webglMessage,
        function () {
          if (!context.webgl2) {
            return;
          }

          buffer = Buffer.createVertexBuffer({
            context: context,
            sizeInBytes: 4,
            usage: BufferUsage.STATIC_DRAW,
          });
          var array = new Uint8Array(4);

          expect(function () {
            buffer.getBufferData(array, 0, -1);
          }).toThrowDeveloperError();
          expect(function () {
            buffer.getBufferData(array, 0, 5);
          }).toThrowDeveloperError();
        }
      );

      it(
        "getBufferData throws with invalid length" + webglMessage,
        function () {
          if (!context.webgl2) {
            return;
          }

          buffer = Buffer.createVertexBuffer({
            context: context,
            sizeInBytes: 4,
            usage: BufferUsage.STATIC_DRAW,
          });
          var array = new Uint8Array(4);

          expect(function () {
            buffer.getBufferData(array, 2, 0, 4);
          }).toThrowDeveloperError();
          expect(function () {
            buffer.getBufferData(array, 0, 2, 4);
          }).toThrowDeveloperError();
        }
      );

      it("getBufferData reads from vertex buffer" + webglMessage, function () {
        if (!context.webgl2) {
          return;
        }

        var typedArray = new Uint8Array(4);
        typedArray[0] = 1;
        typedArray[1] = 2;
        typedArray[2] = 3;
        typedArray[3] = 4;

        buffer = Buffer.createVertexBuffer({
          context: context,
          typedArray: typedArray,
          usage: BufferUsage.STATIC_DRAW,
        });

        var destArray = new Uint8Array(4);
        buffer.getBufferData(destArray);

        expect(destArray).toEqual(typedArray);
      });

      it("getBufferData reads from index buffer" + webglMessage, function () {
        if (!context.webgl2) {
          return;
        }
        var typedArray = new Uint16Array(3);
        typedArray[0] = 1;
        typedArray[1] = 2;
        typedArray[2] = 3;

        buffer = Buffer.createIndexBuffer({
          context: context,
          typedArray: typedArray,
          usage: BufferUsage.STATIC_DRAW,
          indexDatatype: IndexDatatype.UNSIGNED_SHORT,
        });

        var destArray = new Uint16Array(3);
        buffer.getBufferData(destArray);

        expect(destArray).toEqual(typedArray);
      });

      it("copyFromBuffer throws without WebGL 2" + webglMessage, function () {
        if (context.webgl2) {
          return;
        }

        buffer = Buffer.createVertexBuffer({
          context: context,
          sizeInBytes: 4,
          usage: BufferUsage.STATIC_DRAW,
        });
        buffer2 = Buffer.createVertexBuffer({
          context: context,
          sizeInBytes: 4,
          usage: BufferUsage.STATIC_DRAW,
        });

        expect(function () {
          buffer.copyFromBuffer(buffer2, 0, 0, 4);
        }).toThrowDeveloperError();
      });

      it(
        "copyFromBuffer throws without readBuffer" + webglMessage,
        function () {
          if (!context.webgl2) {
            return;
          }

          buffer = Buffer.createVertexBuffer({
            context: context,
            sizeInBytes: 4,
            usage: BufferUsage.STATIC_DRAW,
          });

          expect(function () {
            buffer.copyFromBuffer(undefined, 0, 0, 4);
          }).toThrowDeveloperError();
        }
      );

      it(
        "copyFromBuffer throws with invalid readOffset" + webglMessage,
        function () {
          if (!context.webgl2) {
            return;
          }

          buffer = Buffer.createVertexBuffer({
            context: context,
            sizeInBytes: 4,
            usage: BufferUsage.STATIC_DRAW,
          });
          buffer2 = Buffer.createVertexBuffer({
            context: context,
            sizeInBytes: 4,
            usage: BufferUsage.STATIC_DRAW,
          });

          expect(function () {
            buffer.copyFromBuffer(buffer2, undefined, 0, 4);
          }).toThrowDeveloperError();
          expect(function () {
            buffer.copyFromBuffer(buffer2, -1, 0, 4);
          }).toThrowDeveloperError();
          expect(function () {
            buffer.copyFromBuffer(buffer2, 5, 0, 4);
          }).toThrowDeveloperError();
        }
      );

      it(
        "copyFromBuffer throws with invalid writeOffset" + webglMessage,
        function () {
          if (!context.webgl2) {
            return;
          }

          buffer = Buffer.createVertexBuffer({
            context: context,
            sizeInBytes: 4,
            usage: BufferUsage.STATIC_DRAW,
          });
          buffer2 = Buffer.createVertexBuffer({
            context: context,
            sizeInBytes: 4,
            usage: BufferUsage.STATIC_DRAW,
          });

          expect(function () {
            buffer.copyFromBuffer(buffer2, 0, undefined, 4);
          }).toThrowDeveloperError();
          expect(function () {
            buffer.copyFromBuffer(buffer2, 0, -1, 4);
          }).toThrowDeveloperError();
          expect(function () {
            buffer.copyFromBuffer(buffer2, 0, 5, 4);
          }).toThrowDeveloperError();
        }
      );

      it(
        "copyFromBuffer throws with invalid sizeInBytes" + webglMessage,
        function () {
          if (!context.webgl2) {
            return;
          }

          buffer = Buffer.createVertexBuffer({
            context: context,
            sizeInBytes: 4,
            usage: BufferUsage.STATIC_DRAW,
          });
          buffer2 = Buffer.createVertexBuffer({
            context: context,
            sizeInBytes: 4,
            usage: BufferUsage.STATIC_DRAW,
          });

          expect(function () {
            buffer.copyFromBuffer(buffer2, 0, 0, undefined);
          }).toThrowDeveloperError();
          expect(function () {
            buffer.copyFromBuffer(buffer2, 0, 0, -1);
          }).toThrowDeveloperError();
          expect(function () {
            buffer.copyFromBuffer(buffer2, 0, 0, 0);
          }).toThrowDeveloperError();
          expect(function () {
            buffer.copyFromBuffer(buffer2, 0, 0, 5);
          }).toThrowDeveloperError();
        }
      );

      it(
        "copyFromBuffer throws with one index buffer and the other is not an index buffer" +
          webglMessage,
        function () {
          if (!context.webgl2) {
            return;
          }

          var typedArray = new Uint16Array([0, 1, 2, 3, 4]);
          buffer = Buffer.createIndexBuffer({
            context: context,
            typedArray: typedArray,
            usage: BufferUsage.STATIC_DRAW,
            indexDatatype: IndexDatatype.UNSIGNED_SHORT,
          });
          var typedArray2 = new Float32Array([5.0, 6.0, 7.0, 8.0, 9.0]);
          buffer2 = Buffer.createVertexBuffer({
            context: context,
            typedArray: typedArray2,
            usage: BufferUsage.STATIC_DRAW,
          });

          expect(function () {
            buffer2.copyFromBuffer(buffer, 0, 0, typedArray.byteLength);
          }).toThrowDeveloperError();
        }
      );

      it(
        "copyFromBuffer throws when readBuffer is the same buffer and copy range overlaps" +
          webglMessage,
        function () {
          if (!context.webgl2) {
            return;
          }

          buffer = Buffer.createVertexBuffer({
            context: context,
            sizeInBytes: 4,
            usage: BufferUsage.STATIC_DRAW,
          });

          expect(function () {
            buffer.copyFromBuffer(buffer, 0, 1, 2);
          }).toThrowDeveloperError();
          expect(function () {
            buffer.copyFromBuffer(buffer, 1, 0, 2);
          }).toThrowDeveloperError();
        }
      );

      it("copyFromBuffer with vertex buffers" + webglMessage, function () {
        if (!context.webgl2) {
          return;
        }

        var typedArray = new Float32Array([0.0, 1.0, 2.0, 3.0, 4.0]);
        buffer = Buffer.createVertexBuffer({
          context: context,
          typedArray: typedArray,
          usage: BufferUsage.STATIC_DRAW,
        });
        var typedArray2 = new Float32Array([5.0, 6.0, 7.0, 8.0, 9.0]);
        buffer2 = Buffer.createVertexBuffer({
          context: context,
          typedArray: typedArray2,
          usage: BufferUsage.STATIC_DRAW,
        });

        var destArray = new Float32Array(5);
        buffer.getBufferData(destArray);
        expect(destArray).toEqual(typedArray);
        buffer2.getBufferData(destArray);
        expect(destArray).toEqual(typedArray2);

        buffer2.copyFromBuffer(buffer, 0, 0, typedArray.byteLength);
        buffer2.getBufferData(destArray);
        expect(destArray).toEqual(typedArray);
      });

      it("copyFromBuffer with index buffers" + webglMessage, function () {
        if (!context.webgl2) {
          return;
        }

        var typedArray = new Uint16Array([0, 1, 2, 3, 4]);
        buffer = Buffer.createIndexBuffer({
          context: context,
          typedArray: typedArray,
          usage: BufferUsage.STATIC_DRAW,
          indexDatatype: IndexDatatype.UNSIGNED_SHORT,
        });
        var typedArray2 = new Uint16Array([5, 6, 7, 8, 9]);
        buffer2 = Buffer.createIndexBuffer({
          context: context,
          typedArray: typedArray2,
          usage: BufferUsage.STATIC_DRAW,
          indexDatatype: IndexDatatype.UNSIGNED_SHORT,
        });

        var destArray = new Uint16Array(5);
        buffer.getBufferData(destArray);
        expect(destArray).toEqual(typedArray);
        buffer2.getBufferData(destArray);
        expect(destArray).toEqual(typedArray2);

        buffer2.copyFromBuffer(buffer, 0, 0, typedArray.byteLength);
        buffer2.getBufferData(destArray);
        expect(destArray).toEqual(typedArray);
      });

      it("destroys" + webglMessage, function () {
        var b = Buffer.createIndexBuffer({
          context: context,
          sizeInBytes: 3,
          usage: BufferUsage.STATIC_DRAW,
          indexDatatype: IndexDatatype.UNSIGNED_BYTE,
        });
        expect(b.isDestroyed()).toEqual(false);
        b.destroy();
        expect(b.isDestroyed()).toEqual(true);
      });

      it("fails to provide an array view" + webglMessage, function () {
        buffer = Buffer.createVertexBuffer({
          context: context,
          sizeInBytes: 3,
          usage: BufferUsage.STATIC_DRAW,
        });
        expect(function () {
          buffer.copyFromArrayView();
        }).toThrowDeveloperError();
      });

      it("fails to copy a large array view" + webglMessage, function () {
        buffer = Buffer.createVertexBuffer({
          context: context,
          sizeInBytes: 3,
          usage: BufferUsage.STATIC_DRAW,
        });
        var elements = new ArrayBuffer(3);

        expect(function () {
          buffer.copyFromArrayView(elements, 1);
        }).toThrowDeveloperError();
      });

      it("fails to destroy" + webglMessage, function () {
        var b = Buffer.createIndexBuffer({
          context: context,
          sizeInBytes: 3,
          usage: BufferUsage.STATIC_DRAW,
          indexDatatype: IndexDatatype.UNSIGNED_BYTE,
        });
        b.destroy();

        expect(function () {
          b.destroy();
        }).toThrowDeveloperError();
      });
    }
  },
  "WebGL"
);