package laniakea

type CommandExecutor func(ctx *MsgContext)

type PluginBuilder struct {
	name     string
	commands map[string]*CommandExecutor
	payload  string
}

type Plugin struct {
	Name     string
	Commands map[string]*CommandExecutor
	Payload  string
}

func NewPlugin(name string) *PluginBuilder {
	return &PluginBuilder{
		name:     name,
		commands: make(map[string]*CommandExecutor),
	}
}

func (p *PluginBuilder) Command(cmd string, f CommandExecutor) *PluginBuilder {
	p.commands[cmd] = &f
	return p
}

func (p *PluginBuilder) Payload(payload string) *PluginBuilder {
	p.payload = payload
	return p
}

func (p *PluginBuilder) Build() *Plugin {
	if len(p.commands) == 0 {
		return nil
	}
	plugin := &Plugin{
		Name:     p.name,
		Commands: p.commands,
		Payload:  p.payload,
	}
	return plugin
}

func (p *Plugin) Execute(cmd string, ctx *MsgContext) {
	(*p.Commands[cmd])(ctx)
}