/**
 * Demonstrates the ADD opcode working with arrays
 *
 * ADD now handles array concatenation:
 * - [1, 2, 3] + [4] === [1, 2, 3, 4]
 * - If both operands are arrays, they are concatenated
 */

import { toBytecode, run } from "#reef"

// Basic array concatenation
const basicConcat = toBytecode([
  ["PUSH", 1],
  ["PUSH", 2],
  ["PUSH", 3],
  ["MAKE_ARRAY", 3],
  ["PUSH", 4],
  ["MAKE_ARRAY", 1],
  ["ADD"],
  ["HALT"]
])

console.log('Basic array concatenation ([1, 2, 3] + [4]):')
const result1 = await run(basicConcat)
console.log(result1)
// Output: { type: 'array', value: [1, 2, 3, 4] }

// Concatenate two multi-element arrays
const multiConcat = toBytecode([
  ["PUSH", 1],
  ["PUSH", 2],
  ["MAKE_ARRAY", 2],
  ["PUSH", 3],
  ["PUSH", 4],
  ["MAKE_ARRAY", 2],
  ["ADD"],
  ["HALT"]
])

console.log('\nConcatenate two arrays ([1, 2] + [3, 4]):')
const result2 = await run(multiConcat)
console.log(result2)
// Output: { type: 'array', value: [1, 2, 3, 4] }

// Concatenate multiple arrays in sequence
const multipleConcat = toBytecode([
  ["PUSH", 1],
  ["MAKE_ARRAY", 1],
  ["PUSH", 2],
  ["MAKE_ARRAY", 1],
  ["ADD"],
  ["PUSH", 3],
  ["MAKE_ARRAY", 1],
  ["ADD"],
  ["PUSH", 4],
  ["MAKE_ARRAY", 1],
  ["ADD"],
  ["HALT"]
])

console.log('\nMultiple concatenations ([1] + [2] + [3] + [4]):')
const result3 = await run(multipleConcat)
console.log(result3)
// Output: { type: 'array', value: [1, 2, 3, 4] }

// Concatenate arrays with mixed types
const mixedTypes = toBytecode([
  ["PUSH", 1],
  ["PUSH", "hello"],
  ["MAKE_ARRAY", 2],
  ["PUSH", true],
  ["PUSH", null],
  ["MAKE_ARRAY", 2],
  ["ADD"],
  ["HALT"]
])

console.log('\nConcatenate arrays with mixed types ([1, "hello"] + [true, null]):')
const result4 = await run(mixedTypes)
console.log(result4)
// Output: { type: 'array', value: [1, "hello", true, null] }

// Concatenate empty array with non-empty
const emptyConcat = toBytecode([
  ["MAKE_ARRAY", 0],
  ["PUSH", 1],
  ["PUSH", 2],
  ["PUSH", 3],
  ["MAKE_ARRAY", 3],
  ["ADD"],
  ["HALT"]
])

console.log('\nConcatenate empty array with [1, 2, 3] ([] + [1, 2, 3]):')
const result5 = await run(emptyConcat)
console.log(result5)
// Output: { type: 'array', value: [1, 2, 3] }

// Nested arrays
const nestedConcat = toBytecode([
  ["PUSH", 1],
  ["PUSH", 2],
  ["MAKE_ARRAY", 2],
  ["MAKE_ARRAY", 1],
  ["PUSH", 3],
  ["PUSH", 4],
  ["MAKE_ARRAY", 2],
  ["MAKE_ARRAY", 1],
  ["ADD"],
  ["HALT"]
])

console.log('\nConcatenate nested arrays ([[1, 2]] + [[3, 4]]):')
const result6 = await run(nestedConcat)
console.log(result6)
// Output: { type: 'array', value: [[1, 2], [3, 4]] }