#define _DEFAULT_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dirent.h>

int run_test(const char* dir_name) {
    char cmd[2048];
    char input_path[1024];
    char expected_path[1024];
    
    snprintf(input_path, sizeof(input_path), "v0/integration_tests/%s/input.c2", dir_name);
    snprintf(expected_path, sizeof(expected_path), "v0/integration_tests/%s/expected.c", dir_name);
    
    if (snprintf(cmd, sizeof(cmd), "./v0/bin/c2 %s > actual.c", input_path) >= sizeof(cmd)) {
        printf("Command buffer too small for %s\n", dir_name);
        return 1;
    }
    
    if (system(cmd) != 0) {
        printf("Failed to run compiler for %s\n", dir_name);
        return 1;
    }
    
    if (snprintf(cmd, sizeof(cmd), "diff -u %s actual.c", expected_path) >= sizeof(cmd)) {
        printf("Command buffer too small for %s\n", dir_name);
        return 1;
    }
    
    if (system(cmd) != 0) {
        printf("Test %s failed: Output mismatch\n", dir_name);
        return 1;
    }
    
    printf("Test %s passed\n", dir_name);
    return 0;
}

int main() {
    DIR* d = opendir("v0/integration_tests");
    if (!d) {
        perror("opendir");
        return 1;
    }
    
    struct dirent* dir;
    int passed = 0;
    int failed = 0;
    
    while ((dir = readdir(d)) != NULL) {
        if (dir->d_type == DT_DIR && strcmp(dir->d_name, ".") != 0 && strcmp(dir->d_name, "..") != 0) {
            if (run_test(dir->d_name) == 0) {
                passed++;
            } else {
                failed++;
            }
        }
    }
    closedir(d);
    
    printf("\nTotal tests: %d, Passed: %d, Failed: %d\n", passed + failed, passed, failed);
    return failed > 0 ? 1 : 0;
}