package slack

import (
	"context"
	"net/url"
)

type Bookmark struct {
	ID        string   `json:"id"`
	ChannelID string   `json:"channel_id"`
	Title     string   `json:"title"`
	Link      string   `json:"link"`
	Emoji     string   `json:"emoji"`
	IconURL   string   `json:"icon_url"`
	Type      string   `json:"type"`
	Created   JSONTime `json:"date_created"`
	Updated   JSONTime `json:"date_updated"`
	Rank      string   `json:"rank"`

	LastUpdatedByUserID string `json:"last_updated_by_user_id"`
	LastUpdatedByTeamID string `json:"last_updated_by_team_id"`

	ShortcutID string `json:"shortcut_id"`
	EntityID   string `json:"entity_id"`
	AppID      string `json:"app_id"`
}

type AddBookmarkParameters struct {
	Title    string // A required title for the bookmark
	Type     string // A required type for the bookmark
	Link     string // URL required for type:link
	Emoji    string // An optional emoji
	EntityID string
	ParentID string
}

type EditBookmarkParameters struct {
	Title *string // Change the title. Set to "" to clear
	Emoji *string // Change the emoji. Set to "" to clear
	Link  string  // Change the link
}

type addBookmarkResponse struct {
	Bookmark Bookmark `json:"bookmark"`
	SlackResponse
}

type editBookmarkResponse struct {
	Bookmark Bookmark `json:"bookmark"`
	SlackResponse
}

type listBookmarksResponse struct {
	Bookmarks []Bookmark `json:"bookmarks"`
	SlackResponse
}

// AddBookmark adds a bookmark in a channel
func (api *Client) AddBookmark(channelID string, params AddBookmarkParameters) (Bookmark, error) {
	return api.AddBookmarkContext(context.Background(), channelID, params)
}

// AddBookmarkContext adds a bookmark in a channel with a custom context
func (api *Client) AddBookmarkContext(ctx context.Context, channelID string, params AddBookmarkParameters) (Bookmark, error) {
	values := url.Values{
		"channel_id": {channelID},
		"token":      {api.token},
		"title":      {params.Title},
		"type":       {params.Type},
	}
	if params.Link != "" {
		values.Set("link", params.Link)
	}
	if params.Emoji != "" {
		values.Set("emoji", params.Emoji)
	}
	if params.EntityID != "" {
		values.Set("entity_id", params.EntityID)
	}
	if params.ParentID != "" {
		values.Set("parent_id", params.ParentID)
	}

	response := &addBookmarkResponse{}
	if err := api.postMethod(ctx, "bookmarks.add", values, response); err != nil {
		return Bookmark{}, err
	}

	return response.Bookmark, response.Err()
}

// RemoveBookmark removes a bookmark from a channel
func (api *Client) RemoveBookmark(channelID, bookmarkID string) error {
	return api.RemoveBookmarkContext(context.Background(), channelID, bookmarkID)
}

// RemoveBookmarkContext removes a bookmark from a channel with a custom context
func (api *Client) RemoveBookmarkContext(ctx context.Context, channelID, bookmarkID string) error {
	values := url.Values{
		"channel_id":  {channelID},
		"token":       {api.token},
		"bookmark_id": {bookmarkID},
	}

	response := &SlackResponse{}
	if err := api.postMethod(ctx, "bookmarks.remove", values, response); err != nil {
		return err
	}

	return response.Err()
}

// ListBookmarks returns all bookmarks for a channel.
func (api *Client) ListBookmarks(channelID string) ([]Bookmark, error) {
	return api.ListBookmarksContext(context.Background(), channelID)
}

// ListBookmarksContext returns all bookmarks for a channel with a custom context.
func (api *Client) ListBookmarksContext(ctx context.Context, channelID string) ([]Bookmark, error) {
	values := url.Values{
		"channel_id": {channelID},
		"token":      {api.token},
	}

	response := &listBookmarksResponse{}
	err := api.postMethod(ctx, "bookmarks.list", values, response)
	if err != nil {
		return nil, err
	}
	return response.Bookmarks, response.Err()
}

func (api *Client) EditBookmark(channelID, bookmarkID string, params EditBookmarkParameters) (Bookmark, error) {
	return api.EditBookmarkContext(context.Background(), channelID, bookmarkID, params)
}

func (api *Client) EditBookmarkContext(ctx context.Context, channelID, bookmarkID string, params EditBookmarkParameters) (Bookmark, error) {
	values := url.Values{
		"channel_id":  {channelID},
		"token":       {api.token},
		"bookmark_id": {bookmarkID},
	}
	if params.Link != "" {
		values.Set("link", params.Link)
	}
	if params.Emoji != nil {
		values.Set("emoji", *params.Emoji)
	}
	if params.Title != nil {
		values.Set("title", *params.Title)
	}

	response := &editBookmarkResponse{}
	if err := api.postMethod(ctx, "bookmarks.edit", values, response); err != nil {
		return Bookmark{}, err
	}

	return response.Bookmark, response.Err()
}