package ban

import (
	"strings"

	"github.com/go-irc/irc"
	"github.com/pkg/errors"

	"github.com/Luzifer/twitch-bot/plugins"
)

const actorName = "ban"

var formatMessage plugins.MsgFormatter

func Register(args plugins.RegistrationArguments) error {
	formatMessage = args.FormatMessage

	args.RegisterActor(actorName, func() plugins.Actor { return &actor{} })

	args.RegisterActorDocumentation(plugins.ActionDocumentation{
		Description: "Ban user from chat",
		Name:        "Ban User",
		Type:        "ban",

		Fields: []plugins.ActionDocumentationField{
			{
				Default:         "",
				Description:     "Reason why the user was banned",
				Key:             "reason",
				Name:            "Reason",
				Optional:        true,
				SupportTemplate: true,
				Type:            plugins.ActionDocumentationFieldTypeString,
			},
		},
	})

	return nil
}

type actor struct{}

func (a actor) Execute(c *irc.Client, m *irc.Message, r *plugins.Rule, eventData *plugins.FieldCollection, attrs *plugins.FieldCollection) (preventCooldown bool, err error) {
	ptrStringEmpty := func(v string) *string { return &v }("")

	reason, err := formatMessage(attrs.MustString("reason", ptrStringEmpty), m, r, eventData)
	if err != nil {
		return false, errors.Wrap(err, "executing reason template")
	}

	cmd := []string{
		"/ban",
		plugins.DeriveUser(m, eventData),
	}

	if reason != "" {
		cmd = append(cmd, reason)
	}

	return false, errors.Wrap(
		c.WriteMessage(&irc.Message{
			Command: "PRIVMSG",
			Params: []string{
				plugins.DeriveChannel(m, eventData),
				strings.Join(cmd, " "),
			},
		}),
		"sending ban",
	)
}

func (a actor) IsAsync() bool { return false }
func (a actor) Name() string  { return actorName }

func (a actor) Validate(attrs *plugins.FieldCollection) (err error) { return nil }