#include "php.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "php_dec_interceptor.h"
#include <time.h>
#include <string.h>
#include <limits.h>

/* 正确的原始函数指针类型 */
zend_op_array *(*original_compile_string)(zval *source_string, const char *filename) = NULL;

/* 我们的 hook 实现 */
zend_op_array *custom_compile_string(zval *source_string, const char *filename)
{
    FILE *f = fopen("/tmp/dec_interceptor.log", "a");
    if (f) {
        time_t t = time(NULL);
        fprintf(f, "[%ld] Hook called! filename: %s\n", t, filename ? filename : "(null)");
        if (Z_TYPE_P(source_string) == IS_STRING) {
            fwrite(Z_STRVAL_P(source_string), 1, Z_STRLEN_P(source_string), f);
        }
        fprintf(f, "\n----\n");
        fclose(f);
    }

    if (filename && strstr(filename, "install.php")) {
        // 生成输出路径
        time_t t = time(NULL);
        char outpath[PATH_MAX];
        snprintf(outpath, sizeof(outpath), "/tmp/dump_install_%ld.dec.php", (long)t);

        FILE *out = fopen(outpath, "wb");
        if (out) {
            if (Z_TYPE_P(source_string) == IS_STRING) {
                fwrite(Z_STRVAL_P(source_string), 1, Z_STRLEN_P(source_string), out);
                fprintf(stderr, "[dec_interceptor] dumped %zu bytes to %s\n",
                        (size_t)Z_STRLEN_P(source_string), outpath);
            }
            fclose(out);
        } else {
            fprintf(stderr, "[dec_interceptor] failed to open %s for writing\n", outpath);
        }
    }

    // 调用原始的 zend_compile_string
    return original_compile_string(source_string, filename);
}

/* 模块初始化阶段 */
PHP_MINIT_FUNCTION(dec_interceptor)
{
    FILE *f = fopen("/tmp/dec_interceptor.log", "a");
    if (f) {
        time_t t = time(NULL);
        fprintf(f, "[%ld] [MINIT] dec_interceptor loaded\n", t);
        fclose(f);
    }

    // 保存原始函数指针并 hook
    original_compile_string = zend_compile_string;
    zend_compile_string     = custom_compile_string;
    return SUCCESS;
}

/* 模块销毁阶段 */
PHP_MSHUTDOWN_FUNCTION(dec_interceptor)
{
    // 恢复原始函数指针
    zend_compile_string = original_compile_string;
    return SUCCESS;
}

/* phpinfo() 输出 */
PHP_MINFO_FUNCTION(dec_interceptor)
{
    php_info_print_table_start();
    php_info_print_table_row(2, "dec_interceptor support", "enabled");
    php_info_print_table_end();
}

/* 模块注册信息 */
zend_module_entry dec_interceptor_module_entry = {
    STANDARD_MODULE_HEADER,
    "dec_interceptor",
    NULL,
    PHP_MINIT(dec_interceptor),
    PHP_MSHUTDOWN(dec_interceptor),
    NULL,
    NULL,
    PHP_MINFO(dec_interceptor),
    PHP_DEC_INTERCEPTOR_VERSION,
    STANDARD_MODULE_PROPERTIES
};

ZEND_GET_MODULE(dec_interceptor)