/*
 * Copyright (C) 2026 Fluxer Contributors
 *
 * This file is part of Fluxer.
 *
 * Fluxer is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Fluxer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
 */

package integration

import (
	"bytes"
	"encoding/json"
	"fmt"
	"mime/multipart"
	"net/http"
	"testing"
)

// TestAttachmentUpload_MetadataWithoutFile tests providing attachment metadata
// but not uploading the corresponding file
func TestAttachmentUpload_MetadataWithoutFile(t *testing.T) {
	client := newTestClient(t)
	user := createTestAccount(t, client)
	ensureSessionStarted(t, client, user.Token)

	guild := createGuild(t, client, user.Token, "Metadata Without File Test Guild")
	channelID := parseSnowflake(t, guild.SystemChannel)

	var body bytes.Buffer
	writer := multipart.NewWriter(&body)

	payload := map[string]any{
		"content": "Metadata without file",
		"attachments": []map[string]any{
			{"id": 0, "filename": "missing.png", "description": "This file doesn't exist"},
		},
	}
	payloadJSON, err := json.Marshal(payload)
	if err != nil {
		t.Fatalf("failed to encode payload JSON: %v", err)
	}

	if err := writer.WriteField("payload_json", string(payloadJSON)); err != nil {
		t.Fatalf("failed to write payload_json field: %v", err)
	}

	if err := writer.Close(); err != nil {
		t.Fatalf("failed to close multipart writer: %v", err)
	}

	req, err := http.NewRequest(
		http.MethodPost,
		fmt.Sprintf("%s/channels/%d/messages", client.baseURL, channelID),
		&body,
	)
	if err != nil {
		t.Fatalf("failed to create request: %v", err)
	}
	req.Header.Set("Content-Type", writer.FormDataContentType())
	client.applyCommonHeaders(req)
	req.Header.Set("Authorization", user.Token)

	resp, err := client.httpClient.Do(req)
	if err != nil {
		t.Fatalf("failed to send request: %v", err)
	}
	defer resp.Body.Close()

	assertStatus(t, resp, http.StatusBadRequest)
}