package moderation

import (
	"context"
	"fmt"
	"net/http"
	"net/url"

	"github.com/google/go-querystring/query"
)

type DeleteChatMessagesParams struct {
	// The ID of the broadcaster that owns the chat room to remove messages from.
	BroadcasterID string `url:"broadcaster_id"`

	// The ID of the broadcaster or a user that has permission to moderate the broadcaster’s chat room.
	// This ID must match the user ID in the user access token.
	ModeratorID string `url:"moderator_id"`

	// The ID of the message to remove. The id tag in the PRIVMSG tag contains the message’s ID. Restrictions:
	//
	// - The message must have been created within the last 6 hours.
	//
	// - The message must not belong to the broadcaster.
	//
	// - The message must not belong to another moderator.
	//
	// If not specified, the request removes all messages in the broadcaster’s chat room.
	MessageID *string `url:"message_id,omitempty"`
}

// Removes a single chat message or all chat messages from the broadcaster’s chat room.
//
// Requires a user access token that includes the moderator:manage:chat_messages scope.
func (m *Moderation) DeleteChatMessages(ctx context.Context, params *DeleteChatMessagesParams) error {
	v, _ := query.Values(params)
	endpoint := m.baseUrl.ResolveReference(&url.URL{Path: "moderation/chat", RawQuery: v.Encode()})

	req, err := http.NewRequestWithContext(ctx, http.MethodDelete, endpoint.String(), nil)
	if err != nil {
		return err
	}

	res, err := m.client.Do(req)
	if err != nil {
		return err
	}
	defer res.Body.Close()

	statusOK := res.StatusCode >= 200 && res.StatusCode < 300
	if !statusOK {
		return fmt.Errorf("failed to delete chat messages (%d)", res.StatusCode)
	}

	return nil
}