package extensions

import (
	"context"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"net/url"
	"time"
)

type UpdateExtensionBitsProductRequest struct {
	// The product's SKU. The SKU must be unique within an extension. The product's SKU cannot be changed.
	// The SKU may contain only alphanumeric characters, dashes (-), underscores (_), and periods (.) and is limited to a maximum of 255 characters. No spaces.
	SKU string `json:"sku"`

	// An object that contains the product's cost information.
	Cost struct {
		// The product's price.
		Amount int `json:"amount"`

		// The type of currency. Possible values are:
		//
		// bits
		Type string `json:"type"`
	} `json:"cost"`

	// The product's name as displayed in the extension. The maximum length is 255 characters.
	DisplayName string `json:"display_name"`

	// A Boolean value that indicates whether the product is in development.
	// Set to true if the product is in development and not available for public use.
	// The default is false.
	InDevelopment *bool `json:"in_development"`

	// The date and time, in RFC3339 format, when the product expires.
	Expiration *time.Time `json:"expiration"`

	// A Boolean value that determines whether Bits product purchase events are broadcast to all instances of the extension on a channel.
	// The events are broadcast via the onTransactionComplete helper callback. The default is false.
	IsBroadcast *bool `json:"is_broadcast"`
}

type UpdateExtensionBitsProductResponse struct {
	// A list of Bits products that the extension created. The list is in ascending SKU order.
	// The list is empty if the extension hasn't created any products or they're all expired or disabled.
	Data []BitsProduct `json:"data"`
}

// Adds or updates a Bits product that the extension created.
// If the SKU doesn’t exist, the product is added. You may update all fields except the sku field.
//
// Requires an app access token. The client ID in the app access token must match the extension’s client ID.
func (c *Extensions) UpdateExtensionBitsProduct(ctx context.Context, body *UpdateExtensionBitsProductRequest) (*UpdateExtensionBitsProductResponse, error) {
	endpoint := c.baseUrl.ResolveReference(&url.URL{Path: "bits/extensions"})

	r, w := io.Pipe()

	go func() {
		if err := json.NewEncoder(w).Encode(body); err != nil {
			w.CloseWithError(err)
		} else {
			w.Close()
		}
	}()

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

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

	statusOK := res.StatusCode >= 200 && res.StatusCode < 300
	if !statusOK {
		return nil, fmt.Errorf("failed to update extension bits product (%d)", res.StatusCode)
	}

	var data UpdateExtensionBitsProductResponse
	if err := json.NewDecoder(res.Body).Decode(&data); err != nil {
		return nil, err
	}

	return &data, nil
}