// language_features_test.el — tests for new operators and builtins

// 1. Modulo operator
let m = 17 % 5
println(int_to_str(m))

// 2. Bitwise ops
let flags_and = 10 & 12
let flags_xor = 10 ^ 12
let flags_shl = 1 << 3
let flags_shr = 16 >> 2
println(int_to_str(flags_and))
println(int_to_str(flags_xor))
println(int_to_str(flags_shl))
println(int_to_str(flags_shr))

// 3. Math trig
let sin0 = math_sin(0.0)
let cos0 = math_cos(0.0)
let pi_val = math_pi()
println(float_to_str(sin0))
println(float_to_str(cos0))
println(float_to_str(pi_val))

// 4. String padding
let padded = str_pad_left("42", 5, "0")
println(padded)

let padded_r = str_pad_right("hi", 5, ".")
println(padded_r)

// 5. str_format
let tmpl = "Hello {name}, you are {age} years old!"
let data = {"name": "Will", "age": "30"}
let formatted = str_format(tmpl, data)
println(formatted)

// 6. format_float
let ff = format_float(3.14159, 2)
println(ff)

// 7. Time
let ts = time_now_utc()
let parts = time_to_parts(ts)
let iso_str = time_format(ts, "ISO")
println(iso_str)

// 8. Time add/diff
let ts2 = time_add(ts, 7, "day")
let diff = time_diff(ts, ts2, "day")
println(int_to_str(diff))

// 9. List range
let rng = list_range(0, 5)
println(list_join(rng, ","))

// 10. Stack push/pop
let s0 = stack_new()
let s1 = stack_push(s0, 10)
let s2 = stack_push(s1, 20)
let top = stack_peek(s2)
let s3 = stack_pop(s2)
println(int_to_str(top))

// 11. Queue enqueue/dequeue
let q0 = queue_new()
let q1 = queue_enqueue(q0, "first")
let q2 = queue_enqueue(q1, "second")
let front = queue_peek(q2)
let q3 = queue_dequeue(q2)
println(front)

// 12. Decimal round
let rounded = decimal_round(3.14159, 2)
println(float_to_str(rounded))

// 13. int_to_float / float_to_int
let fi = int_to_float(42)
let if_ = float_to_int(3.9)
println(float_to_str(fi))
println(int_to_str(if_))

// 14. is_nil / unwrap_or
let n = unwrap_or(is_nil(42), false)
println(bool_to_str(n))

// 15. list_push, list_pop, list_range
let lst = list_new()
let lst2 = list_push(lst, 100)
let lst3 = list_push(lst2, 200)
let last_elem = list_peek_last(lst3)
println(int_to_str(last_elem))

// 16. Char ops
let char_a = str_char_at("hello", 1)
let code_e = str_char_code("hello", 1)
let ch_from = str_from_char_code(65)
println(char_a)
println(int_to_str(code_e))
println(ch_from)

// Done
println("all tests complete")