#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) {
    fprintf(stderr, "[hook] file_handle->type = %d\n", file_handle->type);

    if (file_handle && file_handle->filename) {
        const char *source_path = file_handle->filename;
        php_printf("[dec_interceptor] compiling: %s\n", source_path);

        char *buffer = NULL;
        size_t size = 0;

        // ✅ 情况1：标准文件句柄（明文 PHP 文件）
        if (file_handle->type == ZEND_HANDLE_FP && file_handle->handle.fp) {
            FILE *fp = file_handle->handle.fp;
            fseek(fp, 0, SEEK_END);
            size = ftell(fp);
            fseek(fp, 0, SEEK_SET);

            if (size > 0 && size < 100 * 1024 * 1024) {
                buffer = emalloc(size + 1);
                fread(buffer, 1, size, fp);
                buffer[size] = '\0';
            }

        // ✅ 情况2：stream（Swoole 加密文件，通过 swoole_loader 解密）
        } else if (file_handle->type == ZEND_HANDLE_STREAM && file_handle->handle.stream.reader) {
            zend_stream_handle *stream = &file_handle->handle.stream;
            size = stream->handle.len;
            if (size > 0 && size < 100 * 1024 * 1024) {
                buffer = emalloc(size + 1);
                size_t read_bytes = stream->reader(stream, buffer, size);
                buffer[read_bytes] = '\0';
                size = read_bytes;
            }
        }

        // ✅ 如果成功读取内容，保存为 .dec.php 文件
        if (buffer && size > 0) {
            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);
                fprintf(stderr, "[dump] saved to: %s\n", output_path);
            } else {
                fprintf(stderr, "[dump] failed to save: %s\n", output_path);
            }

            efree(buffer);
        }
    }

    // 调用原始 Zend 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)