#include "php.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "php_dec_interceptor.h"

static zend_op_array* (*original_compile_file)(zend_file_handle *file_handle, int type);

static zend_op_array* custom_compile_file(zend_file_handle *file_handle, int type) {
    // 尝试拷贝解密后的 PHP 文件
    if (file_handle && file_handle->filename && file_handle->handle.fp) {
        const char *source_path = file_handle->filename;

        FILE *fp = fopen(source_path, "rb");
        if (fp) {
            fseek(fp, 0, SEEK_END);
            long size = ftell(fp);
            fseek(fp, 0, SEEK_SET);

            if (size > 0 && size < 100 * 1024 * 1024) {  // 限制大小避免错误
                char *buffer = emalloc(size + 1);
                fread(buffer, 1, size, fp);
                buffer[size] = '\0';
                fclose(fp);

                // 保存到同目录 .dec.php 文件
                char output_path[PATH_MAX];
                snprintf(output_path, sizeof(output_path), "%s.dec.php", source_path);

                FILE *out = fopen(output_path, "wb");
                if (out) {
                    fwrite(buffer, 1, size, out);
                    fclose(out);
                }

                efree(buffer);
            }
        }
    }

    // 调用原始编译器
    return original_compile_file(file_handle, type);
}

PHP_MINIT_FUNCTION(dec_interceptor) {
    original_compile_file = zend_compile_file;
    zend_compile_file = custom_compile_file;
    return SUCCESS;
}

PHP_MSHUTDOWN_FUNCTION(dec_interceptor) {
    zend_compile_file = original_compile_file;
    return SUCCESS;
}

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();
}

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),
    "0.1",
    STANDARD_MODULE_PROPERTIES
};

ZEND_GET_MODULE(dec_interceptor)