package emapi

import (
	"fmt"
	"net/url"
)

// Config provides configuration for connecting to the Equinix Metal API provider.
type Config struct {
	// BaseURL is the baseurl to use when connecting to the Equinix Metal API Provider.
	BaseURL string

	// AuthToken is the token to interact with the Equinix Metal API
	AuthToken string

	// ConsumerToken is the token to grant higher privileges in the Equinix Metal API
	ConsumerToken string
}

// Populated checks if any field has been populated.
func (c Config) Populated() bool {
	return c.AuthToken != "" || c.ConsumerToken != "" || c.BaseURL != ""
}

// WithConfig applies all configurations defined in the config.
func WithConfig(config Config) Option {
	return func(c *Client) error {
		var options []Option

		if config.BaseURL != "" {
			options = append(options, WithBaseURL(config.BaseURL))
		}

		if config.AuthToken != "" {
			options = append(options, WithAuthToken(config.AuthToken))
		}

		if config.ConsumerToken != "" {
			options = append(options, WithConsumerToken(config.ConsumerToken))
		}

		for _, opt := range options {
			if err := opt(c); err != nil {
				return err
			}
		}

		return nil
	}
}

// WithBaseURL updates the baseurl used by the client.
func WithBaseURL(baseURL string) Option {
	return func(c *Client) error {
		u, err := url.Parse(baseURL)
		if err != nil {
			return fmt.Errorf("failed to parse emapi base url %s: %w", baseURL, err)
		}

		c.baseURL = u

		return nil
	}
}

// WithAuthToken sets the auth token to authenticate the request with.
func WithAuthToken(token string) Option {
	return func(c *Client) error {
		c.authToken = token

		return nil
	}
}

// WithConsumerToken sets the consumer token to elevate privileges for the request.
func WithConsumerToken(token string) Option {
	return func(c *Client) error {
		c.consumerToken = token

		return nil
	}
}