package entitlements

import (
	"context"
	"encoding/json"
	"fmt"
	"io"
	"net/http"

	"go.fifitido.net/twitch/api/endpoint"
)

type UpdateDropsEntitlementsRequest struct {
	// A list of IDs that identify the entitlements to update. You may specify a maximum of 100 IDs.
	EntitlementIDs *[]string `json:"entitlement_ids,omitempty"`

	// The fulfillment status to set the entitlements to.
	FulfillmentStatus *FulfillmentStatus `json:"fulfillment_status,omitempty"`
}

type UpdateDropsEntitlementsResponse struct {
	// A list that indicates which entitlements were successfully updated and those that weren’t.
	Data []UpdateDropsEntitlementsData `json:"data"`
}

type UpdateDropsEntitlementsData struct {
	// A string that indicates whether the status of the entitlements in the ids field were successfully updated.
	Status UpdateStatus `json:"status"`

	// The list of entitlements that the status in the status field applies to.
	IDs []string `json:"ids"`
}

// Updates the Drop entitlement’s fulfillment status.
//
// The following table identifies which entitlements are updated based on the type of access token used.
// Access token type | Data that’s updated
// ------------------|------------------------------------------------------------------------------------------------------------------------------------------
// App               | Updates all entitlements with benefits owned by the organization in the access token.
// User              | Updates all entitlements owned by the user in the access token and where the benefits are owned by the organization in the access token.
//
// Requires an app access token or user access token. The client ID in the access token must own the game.
func (e *Entitlements) UpdateDropsEntitlements(ctx context.Context, request *UpdateDropsEntitlementsRequest) (*UpdateDropsEntitlementsResponse, error) {
	r, w := io.Pipe()

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

	req, err := http.NewRequestWithContext(ctx, http.MethodPatch, endpoint.Make(e.baseUrl, "entitlements/drops"), r)
	if err != nil {
		return nil, err
	}

	res, err := e.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 drops entitlements (%d)", res.StatusCode)
	}

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

	return &data, nil
}