/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import Fory, {
  Type,
  BFloat16Array,
  BoolArray,
  Float16Array,
  ForyFloat16Array,
} from '../packages/core/index';
import { TypeId } from '../packages/core/lib/type';
import { describe, expect, test } from '@jest/globals';
import * as beautify from 'js-beautify';

describe('array', () => {
  test('should distinguish list and dense array schema builders', () => {
    expect(Type.list(Type.int32()).typeId).toBe(TypeId.LIST);
    expect(Type.int32Array().typeId).toBe(TypeId.INT32_ARRAY);
    expect(Type.uint8Array().typeId).toBe(TypeId.UINT8_ARRAY);
    expect(Type.boolArray().typeId).toBe(TypeId.BOOL_ARRAY);
  });

  test('should expose dense arrays only through element-specific builders', () => {
    expect((Type as Record<string, unknown>).array).toBeUndefined();
    expect(() => Type.map(Type.uint8Array(), Type.string())).toThrow('map key');
  });

  test('should array work', () => {


    const typeinfo = Type.struct({
      typeName: "example.bar"
    }, {
      c: Type.list(Type.struct({
        typeName: "example.foo"
      }, {
        a: Type.string()
      }))
    });
    const fory = new Fory({ compatible: false, ref: true, hooks: {
        afterCodeGenerated: (code: string) => {
          return beautify.js(code, { indent_size: 2, space_in_empty_paren: true, indent_empty_lines: true });
        }
    } });
    const { serialize, deserialize } = fory.register(typeinfo);
    const o = { a: "123" };
    expect(deserialize(serialize({ c: [o, o] }))).toEqual({ c: [o, o] })
  });
  test('should typedarray work', () => {
    const typeinfo = Type.struct({
      typeName: "example.foo",
    }, {
      a: Type.boolArray(),
      a2: Type.int16Array(),
      a3: Type.int32Array(),
      a4: Type.int64Array(),
      a6: Type.float64Array()
    });

    const fory = new Fory({ compatible: false, ref: true });
    const serializer = fory.register(typeinfo).serializer;
    const input = fory.serialize({
      a: [true, false],
      a2: new Int16Array([1, 2, 3]),
      a3: new Int32Array([3, 5, 76]),
      a4: new BigInt64Array([634n, 564n, 76n]),
      a6: new Float64Array([234243.555, 55654.679]),
    }, serializer);
    const result = fory.deserialize(
      input
    );
    expect(result.a).toBeInstanceOf(BoolArray);
    expect(Array.from(result.a)).toEqual([true, false]);
    expect(result.a2).toEqual(new Int16Array([1, 2, 3]));
    expect(result.a3).toEqual(new Int32Array([3, 5, 76]));
    expect(result.a4).toEqual(new BigInt64Array([634n, 564n, 76n]));
    expect(result.a6).toEqual(new Float64Array([234243.555, 55654.679]));
  });


  test('should floatarray work', () => {
    const typeinfo = Type.struct({
      typeName: "example.foo"
    }, {
      a5: Type.float32Array(),
    })

    const fory = new Fory({ compatible: false, ref: true }); const serialize = fory.register(typeinfo).serializer;
    const input = fory.serialize({
      a5: new Float32Array([2.43, 654.4, 55]),
    }, serialize);
    const result = fory.deserialize(
      input
    );
    expect(result.a5[0]).toBeCloseTo(2.43)
    expect(result.a5[1]).toBeCloseTo(654.4)
    expect(result.a5[2]).toBeCloseTo(55)
  });

  test('should float16Array work', () => {
    const typeinfo = Type.struct({
      typeName: "example.foo"
    }, {
      a6: Type.float16Array(),
    })

    const fory = new Fory({ compatible: false, ref: true }); const serialize = fory.register(typeinfo).serializer;
    const input = fory.serialize({
      a6: [1.5, 2.5, -4.5],
    }, serialize);
    const result = fory.deserialize(
      input
    );
    expect(result.a6).toBeInstanceOf(Float16Array as any);
    expect(Array.from(result.a6 as Iterable<number>)[0]).toBeCloseTo(1.5, 1)
    expect(Array.from(result.a6 as Iterable<number>)[1]).toBeCloseTo(2.5, 1)
    expect(Array.from(result.a6 as Iterable<number>)[2]).toBeCloseTo(-4.5, 1)
  });

  test('should bfloat16Array work', () => {
    const typeinfo = Type.struct({
      typeName: "example.foo"
    }, {
      a7: Type.bfloat16Array(),
    });
    const fory = new Fory({ compatible: false, ref: true });
    const serialize = fory.register(typeinfo).serializer;
    const input = fory.serialize({
      a7: [1.5, 2.5, -4.5],
    }, serialize);
    const result = fory.deserialize(input);
    expect(result.a7).toBeInstanceOf(BFloat16Array);
    expect(result.a7).toHaveLength(3);
    expect(result.a7.get(0)).toBeCloseTo(1.5, 2);
    expect(result.a7.get(1)).toBeCloseTo(2.5, 2);
    expect(result.a7.get(2)).toBeCloseTo(-4.5, 2);
  });

  test('should bfloat16Array accept BFloat16Array', () => {
    const typeinfo = Type.struct({
      typeName: "example.foo"
    }, {
      a7: Type.bfloat16Array(),
    });
    const fory = new Fory({ compatible: false, ref: true });
    const serialize = fory.register(typeinfo).serializer;
    const arr = new BFloat16Array([1.25, -2.5, 0]);
    const input = fory.serialize({ a7: arr }, serialize);
    const result = fory.deserialize(input);
    expect(result.a7).toBeInstanceOf(BFloat16Array);
    expect(result.a7).toHaveLength(3);
    expect(result.a7.get(0)).toBeCloseTo(1.25, 2);
    expect(result.a7.get(1)).toBeCloseTo(-2.5, 2);
    expect(result.a7.get(2)).toBe(0);
  });

  test('should expose bool and reduced-precision array carriers', () => {
    const bools = new BoolArray([true, false, true]);
    bools.setValue(1, true);
    expect(Array.from(bools)).toEqual([true, true, true]);
    expect(bools.raw).toEqual(new Uint8Array([1, 1, 1]));

    const f16 = new ForyFloat16Array([1.5, -2]);
    expect(f16.get(0)).toBeCloseTo(1.5, 1);
    expect(f16.get(1)).toBeCloseTo(-2, 1);

    const bf16 = new BFloat16Array([1.5, -2]);
    expect(Array.from(bf16)).toEqual([1.5, -2]);
  });

  test('should write dense array protocol bytes in little-endian order', () => {
    const fory = new Fory({ compatible: false, ref: true });

    const uint16Type = Type.struct({ typeName: 'example.uint16array' }, {
      values: Type.uint16Array(),
    });
    const uint16Serializer = fory.register(uint16Type).serializer;
    const uint16Bytes = fory.serialize({
      values: new Uint16Array([0x1234, 0xabcd]),
    }, uint16Serializer);
    expect(containsBytes(uint16Bytes, [0x34, 0x12, 0xcd, 0xab])).toBe(true);

    const float16Type = Type.struct({ typeName: 'example.float16array' }, {
      values: Type.float16Array(),
    });
    const float16Serializer = fory.register(float16Type).serializer;
    const float16Bytes = fory.serialize({
      values: new ForyFloat16Array([1, -2]),
    }, float16Serializer);
    expect(containsBytes(float16Bytes, [0x00, 0x3c, 0x00, 0xc0])).toBe(true);

    const bfloat16Type = Type.struct({ typeName: 'example.bfloat16array' }, {
      values: Type.bfloat16Array(),
    });
    const bfloat16Serializer = fory.register(bfloat16Type).serializer;
    const bfloat16Bytes = fory.serialize({
      values: new BFloat16Array([1, -2]),
    }, bfloat16Serializer);
    expect(containsBytes(bfloat16Bytes, [0x80, 0x3f, 0x00, 0xc0])).toBe(true);
  });
});

function containsBytes(bytes: Uint8Array, needle: number[]) {
  outer:
  for (let i = 0; i <= bytes.length - needle.length; i++) {
    for (let j = 0; j < needle.length; j++) {
      if (bytes[i + j] !== needle[j]) {
        continue outer;
      }
    }
    return true;
  }
  return false;
}