/*
 * tests/test_json.c — unit tests for util/json.c
 * Build: make test
 * Run:   ./test_runner
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "json.h"

static int passed = 0, failed = 0;

#define CHECK(expr, desc) do { \
    if (expr) { printf("  PASS: %s\n", desc); passed++; } \
    else      { printf("  FAIL: %s\n", desc); failed++; } \
} while(0)

static void test_json_str(void) {
    printf("json_str:\n");
    const char *j = "{\"name\":\"test show\",\"id\":\"42\",\"flag\":true}";
    char *v;

    v = json_str(j, "name"); CHECK(v && strcmp(v,"test show")==0, "string value"); free(v);
    v = json_str(j, "id");   CHECK(v && strcmp(v,"42")==0,        "numeric string"); free(v);
    v = json_str(j, "flag"); CHECK(v && strcmp(v,"true")==0,      "bare value"); free(v);
    v = json_str(j, "missing"); CHECK(v == NULL,                  "missing key"); free(v);
}

static void test_json_array(void) {
    printf("json_array:\n");
    const char *j = "[{\"id\":\"1\"},{\"id\":\"2\"},{\"id\":\"3\"}]";
    int n; char **arr = json_array(j, &n);
    CHECK(n == 3, "count == 3");
    if (arr) {
        char *v = json_str(arr[0], "id"); CHECK(v && strcmp(v,"1")==0, "arr[0].id==1"); free(v);
        v = json_str(arr[2], "id"); CHECK(v && strcmp(v,"3")==0, "arr[2].id==3"); free(v);
        for (int i = 0; i < n; i++) free(arr[i]);
        free(arr);
    }
    /* empty array */
    arr = json_array("[]", &n); CHECK(n == 0, "empty array n==0"); free(arr);
}

static void test_urldecode(void) {
    printf("urldecode:\n");
    char s1[] = "hello%20world";   urldecode(s1); CHECK(strcmp(s1,"hello world")==0,  "%%20 → space");
    char s2[] = "a+b+c";           urldecode(s2); CHECK(strcmp(s2,"a b c")==0,         "+ → space");
    char s3[] = "no%20change%21";  urldecode(s3); CHECK(strcmp(s3,"no change!")==0,    "mixed");
}

static void test_str_icontains(void) {
    printf("str_icontains:\n");
    CHECK(str_icontains("Walking Dead", "walking"), "case-insensitive match");
    CHECK(str_icontains("Walking Dead", "DEAD"),    "uppercase needle");
    CHECK(!str_icontains("Walking Dead", "sopranos"),"no match");
    CHECK(str_icontains("anything", ""),             "empty needle → true");
}

int main(void) {
    test_json_str();
    test_json_array();
    test_urldecode();
    test_str_icontains();
    printf("\n%d passed, %d failed\n", passed, failed);
    return failed ? 1 : 0;
}