/*
Copyright (c) 2019 The Khronos Group Inc.
Use of this source code is governed by an MIT-style license that can be
found in the LICENSE.txt file.
*/

'use strict';

var OutOfBoundsTest = (function() {

var runCommonInvalidValueTests = function(callTemplate, gl, wtu, ext) {
    wtu.shouldGenerateGLError(gl, gl.INVALID_VALUE, wtu.replaceParams(callTemplate, {count: -1, type: 'gl.UNSIGNED_BYTE', offset: 0}));
    wtu.shouldGenerateGLError(gl, gl.INVALID_VALUE, wtu.replaceParams(callTemplate, {count: 0, type: 'gl.UNSIGNED_BYTE', offset: -1}));
    wtu.shouldGenerateGLError(gl, gl.INVALID_VALUE, wtu.replaceParams(callTemplate, {count: -1, type: 'gl.UNSIGNED_BYTE', offset: 1}));
    wtu.shouldGenerateGLError(gl, gl.INVALID_VALUE, wtu.replaceParams(callTemplate, {count: 1, type: 'gl.UNSIGNED_BYTE', offset: -1}));
    wtu.shouldGenerateGLError(gl, gl.INVALID_VALUE, wtu.replaceParams(callTemplate, {count: '0xffffffff', type: 'gl.UNSIGNED_BYTE', offset: 0}));
};

var setupProgramAndBindVertexArray = function(gl, wtu) {
    var program = wtu.loadStandardProgram(gl);

    gl.useProgram(program);
    var vertexObject = gl.createBuffer();
    gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
    gl.enableVertexAttribArray(0);

    return program;
};

var setupProgram2 = function(gl, wtu) {
    var vshader = [
        'attribute vec3 aOne;',
        'attribute vec2 aTwo;',
        'void main() {',
        '  gl_Position = vec4(aOne, 1.0) + vec4(aTwo, 0.0, 1.0);',
        '}'
    ].join('\n');

    var fshader = [
        'void main() {',
        '  gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);',
        '}'
    ].join('\n');

    var program = wtu.setupProgram(gl, [vshader, fshader], [ "aOne", "aTwo" ]);
    if (!program) {
        testFailed("failed to create test program");
    }
    return program;
};

var runDrawArraysTest = function(callTemplate, gl, wtu, ext) {
    var program = setupProgramAndBindVertexArray(gl, wtu);

    debug("Test empty buffer")
    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([  ]), gl.STATIC_DRAW);
    gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
    wtu.shouldGenerateGLError(gl, [gl.NO_ERROR, gl.INVALID_OPERATION], wtu.replaceParams(callTemplate, {offset: 0, count: 1}));
    wtu.shouldGenerateGLError(gl, [gl.NO_ERROR, gl.INVALID_OPERATION], wtu.replaceParams(callTemplate, {offset: 0, count: 10000}));
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {offset: 1, count: 0}));
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {offset: 0, count: 0}));
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {offset: 100, count: 0}));
    runCommonInvalidValueTests(callTemplate, gl, wtu, ext);

    debug("")
    debug("Test buffer with 3 float vectors")
    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0.5,0 ]), gl.STATIC_DRAW);
    gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {offset: 0, count: 3}));
    wtu.shouldGenerateGLError(gl, [gl.NO_ERROR, gl.INVALID_OPERATION], wtu.replaceParams(callTemplate, {offset: 3, count: 2}));
    wtu.shouldGenerateGLError(gl, [gl.NO_ERROR, gl.INVALID_OPERATION], wtu.replaceParams(callTemplate, {offset: 0, count: 10000}));
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {offset: 0, count: 0}));
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {offset: 100, count: 0}));
    runCommonInvalidValueTests(callTemplate, gl, wtu, ext);

    debug("")
    debug("Test buffer with interleaved (3+2) float vectors")

    setupProgram2(gl, wtu);

    var vbo = gl.createBuffer();
    gl.bindBuffer(gl.ARRAY_BUFFER, vbo);
    // enough for 9 vertices, so 3 triangles
    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(9*5), gl.STATIC_DRAW);

    // bind first 3 elements, with a stride of 5 float elements
    gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 5*4, 0);
    // bind 2 elements, starting after the first 3; same stride of 5 float elements
    gl.vertexAttribPointer(1, 2, gl.FLOAT, false, 5*4, 3*4);

    gl.enableVertexAttribArray(0);
    gl.enableVertexAttribArray(1);

    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {offset: 0, count: 9}));

    // negative values must generate INVALID_VALUE; they can never be valid
    wtu.shouldGenerateGLError(gl, gl.INVALID_VALUE, wtu.replaceParams(callTemplate, {offset: 0, count: -500}));
    wtu.shouldGenerateGLError(gl, gl.INVALID_VALUE, wtu.replaceParams(callTemplate, {offset: -200, count: 1}));
    wtu.shouldGenerateGLError(gl, gl.INVALID_VALUE, wtu.replaceParams(callTemplate, {offset: -200, count: -500}));

    // 0xffffffff needs to convert to a 'long' IDL argument as -1, as per
    // WebIDL 4.1.7.  JS ToInt32(0xffffffff) == -1. Thus INVALID_VALUE.
    wtu.shouldGenerateGLError(gl, gl.INVALID_VALUE, wtu.replaceParams(callTemplate, {offset: 0, count: '0xffffffff'}));
    wtu.shouldGenerateGLError(gl, gl.INVALID_VALUE, wtu.replaceParams(callTemplate, {offset: '0xffffffff', count: '0xffffffff'}));
    wtu.shouldGenerateGLError(gl, gl.INVALID_VALUE, wtu.replaceParams(callTemplate, {offset: '0xffffffff', count: 1}));

    // values that could otherwise be valid but aren't due to bindings generate
    // INVALID_OPERATION
    wtu.shouldGenerateGLError(gl, [gl.NO_ERROR, gl.INVALID_OPERATION], wtu.replaceParams(callTemplate, {offset: 0, count: 10000}));
    wtu.shouldGenerateGLError(gl, [gl.NO_ERROR, gl.INVALID_OPERATION], wtu.replaceParams(callTemplate, {offset: '0x7fffffff', count: 1}));
};

var runDrawElementsTest = function(callTemplate, gl, wtu, ext) {
    var program = setupProgramAndBindVertexArray(gl, wtu);
    var contextVersion = wtu.getDefault3DContextVersion();

    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0.5,0 ]), gl.STATIC_DRAW);
    gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);


    debug('');
    debug('Test null index buffer');
    gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, null);
    wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, wtu.replaceParams(callTemplate, {count: 0, type: 'gl.UNSIGNED_BYTE', offset: 0}));

    debug('');
    debug('Test empty index buffer');
    gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.createBuffer());
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {count: 0, type: 'gl.UNSIGNED_BYTE', offset: 0}));
    wtu.shouldGenerateGLError(gl, [gl.NO_ERROR, gl.INVALID_OPERATION], wtu.replaceParams(callTemplate, {count: 3, type: 'gl.UNSIGNED_BYTE', offset: 0}));
    wtu.shouldGenerateGLError(gl, [gl.NO_ERROR, gl.INVALID_OPERATION], wtu.replaceParams(callTemplate, {count: 10000, type: 'gl.UNSIGNED_BYTE', offset: 0}));
    wtu.shouldGenerateGLError(gl, [gl.NO_ERROR, gl.INVALID_OPERATION], wtu.replaceParams(callTemplate, {count: 1, type: 'gl.UNSIGNED_BYTE', offset: 0}));
    runCommonInvalidValueTests(callTemplate, gl, wtu, ext);

    debug('');
    debug('Test buffer with 3 byte indexes');
    gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint8Array([ 0, 1, 2 ]), gl.STATIC_DRAW);
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {count: 3, type: 'gl.UNSIGNED_BYTE', offset: 0}));
    wtu.shouldGenerateGLError(gl, [gl.NO_ERROR, gl.INVALID_OPERATION], wtu.replaceParams(callTemplate, {count: 3, type: 'gl.UNSIGNED_BYTE', offset: 2}));
    wtu.shouldGenerateGLError(gl, [gl.NO_ERROR, gl.INVALID_OPERATION], wtu.replaceParams(callTemplate, {count: 10000, type: 'gl.UNSIGNED_BYTE', offset: 0}));
    runCommonInvalidValueTests(callTemplate, gl, wtu, ext);
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {count: 0, type: 'gl.UNSIGNED_BYTE', offset: 4}));
    wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, wtu.replaceParams(callTemplate, {count: 10000, type: 'gl.UNSIGNED_BYTE', offset: 10000}));

    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, 'gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, (new Uint8Array([ 3, 0, 1, 2 ])).subarray(1), gl.STATIC_DRAW)');
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {count: 3, type: 'gl.UNSIGNED_BYTE', offset: 0}));
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, 'gl.bufferSubData(gl.ELEMENT_ARRAY_BUFFER, 0, new Uint8Array([ 3, 0, 1]))');
    var indexValidationError = wtu.shouldGenerateGLError(gl, [gl.INVALID_OPERATION, gl.NO_ERROR], wtu.replaceParams(callTemplate, {count: 3, type: 'gl.UNSIGNED_BYTE', offset: 0}));
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, 'gl.bufferSubData(gl.ELEMENT_ARRAY_BUFFER, 0, (new Uint8Array([ 3, 0, 1, 2 ])).subarray(1))');
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {count: 3, type: 'gl.UNSIGNED_BYTE', offset: 0}));
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {count: 0, type: 'gl.UNSIGNED_BYTE', offset: 0}));

    debug('');
    debug('Test buffer with interleaved (3+2) float vectors');

    setupProgram2(gl, wtu);

    var vbo = gl.createBuffer();
    gl.bindBuffer(gl.ARRAY_BUFFER, vbo);
    // enough for 9 vertices, so 3 triangles
    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(9*5), gl.STATIC_DRAW);

    // bind first 3 elements, with a stride of 5 float elements
    gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 5*4, 0);
    // bind 2 elements, starting after the first 3; same stride of 5 float elements
    gl.vertexAttribPointer(1, 2, gl.FLOAT, false, 5*4, 3*4);

    gl.enableVertexAttribArray(0);
    gl.enableVertexAttribArray(1);

    var ebo = gl.createBuffer();
    gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, ebo);
    // For WebGL 2, PRIMITIVE_RESTART_FIXED_INDEX is always enabled.
    // 0xffff will be handled as a primitive restart.
    if (contextVersion <= 1) {
        gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array(
            [ 0, 1, 2,
              1, 2, 0,
              2, 0, 1,
              201, 202, 203,
              0x7fff, 0x7fff, 0x7fff,
              0xffff, 0xffff, 0xffff ]),
            gl.STATIC_DRAW);
    } else {
        gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array(
            [ 0, 1, 2,
              1, 2, 0,
              2, 0, 1,
              201, 202, 203,
              0x7fff, 0x7fff, 0x7fff,
              0xffff - 1, 0xffff - 1, 0xffff - 1 ]),
            gl.STATIC_DRAW);
    }

    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {count: 9, type: 'gl.UNSIGNED_SHORT', offset: 0}));


    // invalid operation with indices that would be valid with correct bindings
    wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, wtu.replaceParams(callTemplate, {count: 9, type: 'gl.UNSIGNED_SHORT', offset: 1000}));
    wtu.shouldGenerateGLError(gl, indexValidationError, wtu.replaceParams(callTemplate, {count: 12, type: 'gl.UNSIGNED_SHORT', offset: 0}));
    wtu.shouldGenerateGLError(gl, indexValidationError, wtu.replaceParams(callTemplate, {count: 15, type: 'gl.UNSIGNED_SHORT', offset: 0}));
    wtu.shouldGenerateGLError(gl, indexValidationError, wtu.replaceParams(callTemplate, {count: 18, type: 'gl.UNSIGNED_SHORT', offset: 0}));
    wtu.shouldGenerateGLError(gl, indexValidationError, wtu.replaceParams(callTemplate, {count: 3, type: 'gl.UNSIGNED_SHORT', offset: 2*15}));

    // 0xffffffff needs to convert to a 'long' IDL argument as -1, as per
    // WebIDL 4.1.7.  JS ToInt32(0xffffffff) == -1. Thus INVALID_VALUE.
    wtu.shouldGenerateGLError(gl, gl.INVALID_VALUE, wtu.replaceParams(callTemplate, {count: '0xffffffff', type: 'gl.UNSIGNED_SHORT', offset: 0}));
    // offset is defined as GLintptr, which is long long in IDL (64-bit).
    // 2^32 - 1 should not overflow, and only result in INVALID_OPERATION.
    wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, wtu.replaceParams(callTemplate, {count: 1, type: 'gl.UNSIGNED_SHORT', offset: '0xffffffff'}));

    wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, wtu.replaceParams(callTemplate, {count: '0x7fffffff', type: 'gl.UNSIGNED_SHORT', offset: 0}));

    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {count: 0, type: 'gl.UNSIGNED_SHORT', offset: 0}));

    // invalid operation with offset that's not a multiple of the type size
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {count: 6, type: 'gl.UNSIGNED_SHORT', offset: 0}));
    wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, wtu.replaceParams(callTemplate, {count: 6, type: 'gl.UNSIGNED_SHORT', offset: 1}));
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {count: 6, type: 'gl.UNSIGNED_SHORT', offset: 2}));

    // invalid operation if no buffer is bound to ELEMENT_ARRAY_BUFFER
    gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, null);
    wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, wtu.replaceParams(callTemplate, {count: 6, type: 'gl.UNSIGNED_SHORT', offset: 0}));
    gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, ebo);

    debug('');
    debug('Test buffer setting attrib 0 to a buffer too small and disable it.');
    var smallVBO = gl.createBuffer();
    gl.bindBuffer(gl.ARRAY_BUFFER, smallVBO);
    gl.bufferData(gl.ARRAY_BUFFER, 1, gl.STATIC_DRAW);
    gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0x10);
    gl.disableVertexAttribArray(0);
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {count: 6, type: 'gl.UNSIGNED_SHORT', offset: 2}));
    gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, null);
    wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, wtu.replaceParams(callTemplate, {count: 6, type: 'gl.UNSIGNED_SHORT', offset: 2}));
};

var runInstancedTest = function(callTemplate, gl, wtu, ext) {
    setupProgram2(gl, wtu);

    // Initialize non-instanced attribute data.
    // Enough for 9 vertices, so 3 triangles.
    var vbo = gl.createBuffer();
    gl.bindBuffer(gl.ARRAY_BUFFER, vbo);
    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(9*3), gl.STATIC_DRAW);

    gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);

    // Setup buffer for instanced attribute data.
    var vbo2 = gl.createBuffer();
    gl.bindBuffer(gl.ARRAY_BUFFER, vbo2);
    gl.vertexAttribPointer(1, 2, gl.FLOAT, false, 0, 0);

    gl.enableVertexAttribArray(0);
    gl.enableVertexAttribArray(1);

    debug('Test out-of-range instanced attributes');
    debug('');

    debug('Test with an empty buffer for the instanced attribute');
    ext.vertexAttribDivisorANGLE(1, 1);
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {offset: 0, count: 9, primcount: 0}));
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {offset: 0, count: 10000, primcount: 0}));
    wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, wtu.replaceParams(callTemplate, {offset: 0, count: 9, primcount: 1}));

    debug('Test with a buffer with 1 float for the instanced attribute');
    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(1), gl.STATIC_DRAW);
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {offset: 0, count: 9, primcount: 0}));
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {offset: 0, count: 10000, primcount: 0}));
    wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, wtu.replaceParams(callTemplate, {offset: 0, count: 9, primcount: 1}));

    debug('');
    debug('Test with a buffer with 2 floats for the instanced attribute');
    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(2), gl.STATIC_DRAW);
    debug('Divisor 1');
    ext.vertexAttribDivisorANGLE(1, 1);
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {offset: 0, count: 9, primcount: 1}));
    wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, wtu.replaceParams(callTemplate, {offset: 0, count: 9, primcount: 2}));
    debug('Divisor 3');
    ext.vertexAttribDivisorANGLE(1, 3);
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {offset: 0, count: 9, primcount: 3}));
    wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, wtu.replaceParams(callTemplate, {offset: 0, count: 9, primcount: 4}));
    wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, wtu.replaceParams(callTemplate, {offset: 0, count: 9, primcount: 10000}));

    debug('');
    debug('Test with a buffer with 4 floats for the instanced attribute');
    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(4), gl.STATIC_DRAW);
    debug('Divisor 1');
    ext.vertexAttribDivisorANGLE(1, 1);
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {offset: 0, count: 9, primcount: 2}));
    wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, wtu.replaceParams(callTemplate, {offset: 0, count: 9, primcount: 3}));
    debug('Divisor 2');
    ext.vertexAttribDivisorANGLE(1, 2);
    wtu.shouldGenerateGLError(gl, gl.NO_ERROR, wtu.replaceParams(callTemplate, {offset: 0, count: 9, primcount: 4}));
    wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, wtu.replaceParams(callTemplate, {offset: 0, count: 9, primcount: 5}));
};

var runDrawArraysInstancedTest = function(callTemplate, gl, wtu, ext) {
    runInstancedTest(callTemplate, gl, wtu, ext);
};

var runDrawElementsInstancedTest = function(callTemplate, gl, wtu, ext) {
    var ebo = gl.createBuffer();
    gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, ebo);
    gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint8Array(
        [ 0, 1, 2,
          5, 4, 3,
          6, 7, 8 ]),
        gl.STATIC_DRAW);
    callTemplate = wtu.replaceParams(callTemplate, {type: 'gl.UNSIGNED_BYTE', offset: '$(offset)', count: '$(count)', primcount: '$(primcount)'});
    runInstancedTest(callTemplate, gl, wtu, ext);
};

return {
    runDrawArraysTest: runDrawArraysTest,
    runDrawArraysInstancedTest: runDrawArraysInstancedTest,
    runDrawElementsTest: runDrawElementsTest,
    runDrawElementsInstancedTest: runDrawElementsInstancedTest
};

})();