#include "../../unity/unity.h"
#include <string.h>
#include <stdlib.h>

/* Unity required hooks */
void setUp(void) {
  /* No setup needed */
}
void tearDown(void) {
  /* No teardown needed */
}

/* Tests for static void remove_suffix (char *name, char const *suffix) */

/* Basic removal when suffix matches exactly at end */
void test_remove_suffix_basic_removal(void) {
  char name[32];
  strcpy(name, "foo.txt");
  remove_suffix(name, ".txt");
  TEST_ASSERT_EQUAL_STRING("foo", name);
}

/* No removal when suffix does not match at end */
void test_remove_suffix_no_match(void) {
  char name[32];
  strcpy(name, "foo.txt");
  remove_suffix(name, ".log");
  TEST_ASSERT_EQUAL_STRING("foo.txt", name);
}

/* No removal when name equals suffix entirely */
void test_remove_suffix_exact_match_no_removal(void) {
  char name[16];
  strcpy(name, "abc");
  remove_suffix(name, "abc");
  TEST_ASSERT_EQUAL_STRING("abc", name);
}

/* No removal when suffix is longer than name */
void test_remove_suffix_suffix_longer_than_name(void) {
  char name[16];
  strcpy(name, "abc");
  remove_suffix(name, "zabcd");
  TEST_ASSERT_EQUAL_STRING("abc", name);
}

/* Empty suffix should not change the name */
void test_remove_suffix_empty_suffix_no_change(void) {
  char name[16];
  strcpy(name, "abc");
  remove_suffix(name, "");
  TEST_ASSERT_EQUAL_STRING("abc", name);
}

/* Empty name should remain empty regardless of suffix */
void test_remove_suffix_empty_name(void) {
  char name[4];
  strcpy(name, "");
  remove_suffix(name, "abc");
  TEST_ASSERT_EQUAL_STRING("", name);
}

/* Case sensitivity: must not remove when case differs */
void test_remove_suffix_case_sensitivity(void) {
  char name[32];
  strcpy(name, "File.TXT");
  remove_suffix(name, ".txt");
  TEST_ASSERT_EQUAL_STRING("File.TXT", name);
}

/* Remove only the trailing occurrence of a shorter suffix */
void test_remove_suffix_remove_only_trailing_occurrence(void) {
  char name[32];
  strcpy(name, "foobarbar");
  remove_suffix(name, "bar");
  TEST_ASSERT_EQUAL_STRING("foobar", name);
}

/* Remove a longer multi-character suffix that matches at end */
void test_remove_suffix_longer_suffix_removal(void) {
  char name[32];
  strcpy(name, "foobarbar");
  remove_suffix(name, "barbar");
  TEST_ASSERT_EQUAL_STRING("foo", name);
}

/* Partial match from end that fails earlier must not modify */
void test_remove_suffix_partial_match_then_mismatch_should_not_modify(void) {
  char name[32];
  strcpy(name, "abcdXY");
  remove_suffix(name, "cXY"); /* Ends with dXY not cXY */
  TEST_ASSERT_EQUAL_STRING("abcdXY", name);
}

/* Suffix matches all but the first character: leaves a single-char name */
void test_remove_suffix_leave_single_char(void) {
  char name[32];
  strcpy(name, "abcdef");
  remove_suffix(name, "bcdef");
  TEST_ASSERT_EQUAL_STRING("a", name);
}

/* Suffix longer than name but ending matches the whole name: no removal */
void test_remove_suffix_suffix_longer_but_tail_matches_name(void) {
  char name[8];
  strcpy(name, "ab");
  remove_suffix(name, "cab");
  TEST_ASSERT_EQUAL_STRING("ab", name);
}

/* UTF-8 content: treated as bytes, suffix removal still works */
void test_remove_suffix_utf8_bytes(void) {
  char name[64];
  strcpy(name, "grün.txt"); /* 'ü' is multibyte in UTF-8 */
  remove_suffix(name, ".txt");
  TEST_ASSERT_EQUAL_STRING("grün", name);

  /* Also ensure non-ASCII mismatch behaves as expected */
  strcpy(name, "naïve.TXT");
  remove_suffix(name, ".txt"); /* case mismatch */
  TEST_ASSERT_EQUAL_STRING("naïve.TXT", name);
}

/* Exact-length match should not remove (protect from emptying) */
void test_remove_suffix_exact_length_protection(void) {
  char name[16];
  strcpy(name, "aa");
  remove_suffix(name, "aa");
  TEST_ASSERT_EQUAL_STRING("aa", name);
}

int main(void) {
  UNITY_BEGIN();
  RUN_TEST(test_remove_suffix_basic_removal);
  RUN_TEST(test_remove_suffix_no_match);
  RUN_TEST(test_remove_suffix_exact_match_no_removal);
  RUN_TEST(test_remove_suffix_suffix_longer_than_name);
  RUN_TEST(test_remove_suffix_empty_suffix_no_change);
  RUN_TEST(test_remove_suffix_empty_name);
  RUN_TEST(test_remove_suffix_case_sensitivity);
  RUN_TEST(test_remove_suffix_remove_only_trailing_occurrence);
  RUN_TEST(test_remove_suffix_longer_suffix_removal);
  RUN_TEST(test_remove_suffix_partial_match_then_mismatch_should_not_modify);
  RUN_TEST(test_remove_suffix_leave_single_char);
  RUN_TEST(test_remove_suffix_suffix_longer_but_tail_matches_name);
  RUN_TEST(test_remove_suffix_utf8_bytes);
  RUN_TEST(test_remove_suffix_exact_length_protection);
  return UNITY_END();
}