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export const description = `
Execution Tests for zero value constructors
`;

import { makeTestGroup } from '../../../../../common/framework/test_group.js';
import { AllFeaturesMaxLimitsGPUTest } from '../../../../gpu_test.js';
import { ScalarKind, Type } from '../../../../util/conversion.js';
import { ShaderBuilderParams, basicExpressionBuilder, run } from '../expression.js';

export const g = makeTestGroup(AllFeaturesMaxLimitsGPUTest);

g.test('scalar')
  .specURL('https://www.w3.org/TR/WGSL/#zero-value-builtin-function')
  .desc(`Test that a zero value scalar constructor produces the expected zero value`)
  .params(u => u.combine('type', ['bool', 'i32', 'u32', 'f32', 'f16'] as const))
  .fn(async t => {
    if (t.params.type === 'f16') {
      t.skipIfDeviceDoesNotHaveFeature('shader-f16');
    }
    const type = Type[t.params.type];
    await run(
      t,
      basicExpressionBuilder(ops => `${type}()`),
      [],
      type,
      { inputSource: 'const' },
      [{ input: [], expected: type.create(0) }]
    );
  });

g.test('vector')
  .specURL('https://www.w3.org/TR/WGSL/#zero-value-builtin-function')
  .desc(`Test that a zero value vector constructor produces the expected zero value`)
  .params(u =>
    u
      .combine('type', ['bool', 'i32', 'u32', 'f32', 'f16'] as const)
      .combine('width', [2, 3, 4] as const)
  )
  .fn(async t => {
    if (t.params.type === 'f16') {
      t.skipIfDeviceDoesNotHaveFeature('shader-f16');
    }
    const type = Type.vec(t.params.width, Type[t.params.type]);
    await run(
      t,
      basicExpressionBuilder(ops => `${type}()`),
      [],
      type,
      { inputSource: 'const' },
      [{ input: [], expected: type.create(0) }]
    );
  });

g.test('vector_prefix')
  .desc(`Test that a zero value vector constructor produces the expected zero value`)
  .params(u =>
    u.combine('type', ['i32', 'u32', 'f32', 'f16'] as const).combine('width', [2, 3, 4] as const)
  )
  .fn(async t => {
    if (t.params.type === 'f16') {
      t.skipIfDeviceDoesNotHaveFeature('shader-f16');
    }
    const type = Type.vec(t.params.width, Type[t.params.type]);
    await run(
      t,
      basicExpressionBuilder(ops => `vec${t.params.width}()`),
      [],
      type,
      { inputSource: 'const', constEvaluationMode: 'direct' },
      [{ input: [], expected: type.create(0) }]
    );
  });

g.test('matrix')
  .specURL('https://www.w3.org/TR/WGSL/#zero-value-builtin-function')
  .desc(`Test that a zero value matrix constructor produces the expected zero value`)
  .params(u =>
    u
      .combine('type', ['f32', 'f16'] as const)
      .combine('columns', [2, 3, 4] as const)
      .combine('rows', [2, 3, 4] as const)
  )
  .fn(async t => {
    if (t.params.type === 'f16') {
      t.skipIfDeviceDoesNotHaveFeature('shader-f16');
    }
    const type = Type.mat(t.params.columns, t.params.rows, Type[t.params.type]);
    await run(
      t,
      basicExpressionBuilder(ops => `${type}()`),
      [],
      type,
      { inputSource: 'const' },
      [{ input: [], expected: type.create(0) }]
    );
  });

g.test('array')
  .specURL('https://www.w3.org/TR/WGSL/#zero-value-builtin-function')
  .desc(`Test that a zero value matrix constructor produces the expected zero value`)
  .params(u =>
    u
      .combine('type', ['bool', 'i32', 'u32', 'f32', 'f16', 'vec3f', 'vec4i'] as const)
      .combine('length', [1, 5, 10] as const)
  )
  .fn(async t => {
    if (t.params.type === 'f16') {
      t.skipIfDeviceDoesNotHaveFeature('shader-f16');
    }
    const type = Type.array(t.params.length, Type[t.params.type]);
    await run(
      t,
      basicExpressionBuilder(ops => `${type}()`),
      [],
      type,
      { inputSource: 'const' },
      [{ input: [], expected: type.create(0) }]
    );
  });

g.test('structure')
  .specURL('https://www.w3.org/TR/WGSL/#zero-value-builtin-function')
  .desc(`Test that an structure constructed from element values produces the expected value`)
  .params(u =>
    u
      .combine('member_types', [
        ['bool'],
        ['u32'],
        ['vec3f'],
        ['i32', 'u32'],
        ['i32', 'f16', 'vec4i', 'mat3x2f'],
        ['bool', 'u32', 'f16', 'vec3f', 'vec2i'],
        ['i32', 'u32', 'f32', 'f16', 'vec3f', 'vec4i'],
      ] as readonly ScalarKind[][])
      .combine('nested', [false, true])
      .beginSubcases()
      .expand('member_index', t => t.member_types.map((_, i) => i))
  )
  .fn(async t => {
    if (t.params.member_types.includes('f16')) {
      t.skipIfDeviceDoesNotHaveFeature('shader-f16');
    }
    const memberType = Type[t.params.member_types[t.params.member_index]];
    const builder = basicExpressionBuilder(_ =>
      t.params.nested
        ? `OuterStruct().inner.member_${t.params.member_index}`
        : `MyStruct().member_${t.params.member_index}`
    );
    await run(
      t,
      (params: ShaderBuilderParams) => {
        return `
${t.params.member_types.includes('f16') ? 'enable f16;' : ''}

${builder(params)}

struct MyStruct {
${t.params.member_types.map((ty, i) => `  member_${i} : ${ty},`).join('\n')}
};
struct OuterStruct {
  pre : i32,
  inner : MyStruct,
  post : i32,
};
`;
      },
      [],
      memberType,
      { inputSource: 'const' },
      [{ input: [], expected: memberType.create(0) }]
    );
  });