import t
import stdio
import string
import testcheck

def test_for_in_string():
    testcheck.section("Test 1: for-in string iteration")
    s: t.CChar | t.CPtr = "Hello"
    result: t.CInt = 0
    for ch in s:
        result += ch
    # H=72, e=101, l=108, l=108, o=111 => 500
    testcheck.check(result == 500, "for-in string (sum=500)", "for-in string (sum expect 500)")

def test_for_in_char_ptr():
    testcheck.section("Test 2: for-in char* iteration")
    s: t.CChar | t.CPtr = "ABC"
    chars: t.CArray[t.CInt, 4] = [0]
    idx: t.CInt = 0
    for ch in s:
        if idx < 3:
            chars[idx] = ch
        idx += 1
    testcheck.check(chars[0] == 65 and chars[1] == 66 and chars[2] == 67, "for-in char* (A=65 B=66 C=67)", "for-in char* (expect A=65 B=66 C=67)")

def test_strcpy_for_in():
    testcheck.section("Test 3: strcpy using for-in")
    src: t.CChar | t.CPtr = "test"
    # 手动实现 strcpy 用 for-in
    import w32.win32memory
    buf: t.CChar | t.CPtr = w32.win32memory.VirtualAlloc(t.CVoid(0, t.CPtr), 64, 12288, 4)
    if t.CUInt64T(buf) == 0:
        stdio.printf("SKIP: VirtualAlloc returned NULL\n")
        return
    string.memset(buf, 0, 64)
    # 用 for-in 复制
    p: t.CChar | t.CPtr = buf
    for ch in src:
        p[0] = ch
        p += 1
    p[0] = 0
    testcheck.check(buf == "test", "strcpy for-in (result=test)", "strcpy for-in (cmp mismatch)")

import w32.win32memory

def main() -> t.CInt:
    testcheck.begin("IterTest: 指针迭代测试")
    test_for_in_string()
    test_for_in_char_ptr()
    test_strcpy_for_in()
    return testcheck.end()
