/* dec_interceptor.c */
#include "php.h"
#include "zend_compile.h"
#include "php_dec_interceptor.h"
#include <time.h>
#include <limits.h>

/* 先声明保留所有可能的原始指针 */
static zend_op_array *(*prev_compile_file)(zend_file_handle *fh, int type);
static zend_op_array *(*prev_compile_string)(zval *src, const char *filename);
static zend_op_array *(*prev_compile)(zend_file_handle *fh, int type);

/* 1. 覆盖 zend_compile_file */
static zend_op_array *hook_compile_file(zend_file_handle *fh, int type) {
    /* 记录到日志 */
    FILE *f = fopen("/tmp/dec_interceptor.log","a");
    if (f) {
        fprintf(f, "[%ld] compile_file: %s\n",
            (long)time(NULL), fh->filename ? fh->filename : "(null)");
        fclose(f);
    }
    /* 链式调用：先走上一个（可能是原生，也可能是 swoole_loader） */
    return prev_compile_file(fh, type);
}

/* 2. 覆盖 zend_compile_string */
static zend_op_array *hook_compile_string(zval *src, const char *filename) {
    FILE *f = fopen("/tmp/dec_interceptor.log","a");
    if (f) {
        fprintf(f, "[%ld] compile_string: %s\n",
            (long)time(NULL), filename?filename:"(null)");
        if (Z_TYPE_P(src)==IS_STRING) {
            fwrite(Z_STRVAL_P(src),1,Z_STRLEN_P(src),f);
            fprintf(f,"\n----\n");
        }
        fclose(f);
    }
    return prev_compile_string(src, filename);
}

/* Zend 扩展的启动函数 */
static void dec_interceptor_startup(zend_extension *extension) {
    /* 链式 Hook：把当前引擎指针交给 prev_* 保存，然后重写 */
    prev_compile_file   = zend_compile_file;
    zend_compile_file   = hook_compile_file;
    prev_compile_string = zend_compile_string;
    zend_compile_string = hook_compile_string;
    
    /* 追加一条 MINIT 日志 */
    FILE *f = fopen("/tmp/dec_interceptor.log","a");
    if (f) {
        fprintf(f, "[%ld] [ZendExt] hook initialized\n", (long)time(NULL));
        fclose(f);
    }
}

/* zend_extension_entry 结构 */
zend_extension dec_interceptor_zend_extension = {
    .name            = "dec_interceptor",
    .version         = PHP_DEC_INTERCEPTOR_VERSION,
    .startup         = dec_interceptor_startup,
    .shutdown        = NULL,
    .activate        = NULL,
    .deactivate      = NULL,
    .message_handler = NULL,
    .op_array_handler= NULL,
    .resource_number = 0,
    .build_id        = ZEND_MODULE_API_NO,
    .disable_zend_debug = 0
};