package main

import (
	"fmt"
	"log"
	"os"
	"path/filepath"
	"plugin"
    "common"
)

// Module 接口，所有插件必须实现该接口
type Module interface {
    Init() error
    TextHandler(opts *common.SubHandlerOpts) error
    InlineCommandKeyword() string
    InlineHandler(opts *common.SubHandlerOpts) error
}


// 
func LoadPlugins(dir string) (map[string]Module, []string, error) {
    var modules = make(map[string]Module)
    var module_names []string

    files, err := os.ReadDir(dir)
    if err != nil {
        return nil, nil, err
    }

    for _, file := range files {
        if file.IsDir() || filepath.Ext(file.Name()) != ".so" {
            continue
        }

        modulePath := filepath.Join(dir, file.Name())
        module, err := RegisterModule(modulePath)
        if err != nil {
            log.Printf("Failed to load module %s: %v", modulePath, err)
        } else {
            modules[file.Name()] = module
            module_names = append(module_names, file.Name())
        }
    }

    return modules, module_names, nil
}

func RegisterModule(modulePath string) (Module, error) {
    p, err := plugin.Open(modulePath)
    if err != nil {
        return nil, err
    }

    symModule, err := p.Lookup("Module")
    if err != nil {
        return nil, err
    }

    module, ok := symModule.(Module)
    if !ok {
        return nil, fmt.Errorf("plugin does not implement the Module interface")
    }

    // 注册模块
    return module, nil
}