/**
 * Utilities for mission-related file paths and uploads
 */

import { S3Client, PutObjectCommand } from '@aws-sdk/client-s3';

// Initialize S3 client for Minio
const s3Client = new S3Client({
  region: 'us-east-1',
  endpoint: 'https://dome-api.slm-lab.net',
  credentials: {
    accessKeyId: '4aBT4CMb7JIMMyUtp4Pl',
    secretAccessKey: 'HGn39XhCIlqOjmDVzRK9MED2Fci2rYvDDgbLFElg'
  },
  forcePathStyle: true // Required for MinIO
});

// Generate the mission logo path in Minio
export function getMissionLogoPath(userId: string, missionId: string, fileExtension: string): string {
  // Use a consistent path structure: missions/{missionId}/logo{extension}
  return `missions/${missionId}/logo${fileExtension}`;
}

// Generate the mission attachment path in Minio
export function getMissionAttachmentPath(userId: string, missionId: string, filename: string): string {
  // Use a consistent path structure: missions/{missionId}/attachments/{filename}
  return `missions/${missionId}/attachments/${filename}`;
}

// Helper function to ensure a path has the missions/ prefix
export function ensureMissionsPrefix(path: string): string {
  return path.startsWith('missions/') ? path : `missions/${path}`;
}

// Helper function to construct a public URL for a mission file
export function getMissionFileUrl(path: string): string {
  const normalizedPath = ensureMissionsPrefix(path);
  return `/api/missions/image/${normalizedPath}`;
}

// Helper function to delete a mission logo
export async function deleteMissionLogo(missionId: string, logoPath: string): Promise<void> {
  try {
    const normalizedPath = ensureMissionsPrefix(logoPath);
    // Add your S3/MinIO deletion logic here
    console.log('Deleting mission logo:', {
      missionId,
      originalPath: logoPath,
      normalizedPath
    });
  } catch (error) {
    console.error('Error deleting mission logo:', {
      error,
      missionId,
      logoPath,
      errorType: error instanceof Error ? error.constructor.name : typeof error,
      message: error instanceof Error ? error.message : String(error)
    });
    throw error;
  }
}

// Upload a mission logo to Minio
export async function uploadMissionLogo(userId: string, missionId: string, file: File): Promise<{ filePath: string }> {
  try {
    console.log('Starting logo upload:', {
      userId,
      missionId,
      fileName: file.name,
      fileSize: file.size,
      fileType: file.type
    });

    const fileExtension = file.name.substring(file.name.lastIndexOf('.'));
    const filePath = getMissionLogoPath(userId, missionId, fileExtension);
    const minioPath = filePath.replace(/^missions\//, ''); // Remove prefix for Minio

    // Convert File to Buffer
    const arrayBuffer = await file.arrayBuffer();
    const buffer = Buffer.from(arrayBuffer);

    console.log('Uploading to Minio:', {
      bucket: 'missions',
      key: minioPath,
      contentType: file.type
    });

    await s3Client.send(new PutObjectCommand({
      Bucket: 'missions',
      Key: minioPath,
      Body: buffer,
      ContentType: file.type,
      ACL: 'public-read'
    }));

    console.log('Logo upload successful:', {
      filePath,
      minioPath
    });

    return { filePath };
  } catch (error) {
    console.error('Error uploading mission logo:', {
      error,
      userId,
      missionId,
      fileName: file.name,
      errorType: error instanceof Error ? error.constructor.name : typeof error,
      message: error instanceof Error ? error.message : String(error)
    });
    throw error;
  }
}

// Upload a mission attachment to Minio
export async function uploadMissionAttachment(
  userId: string, 
  missionId: string, 
  file: File
): Promise<{ 
  filename: string;
  filePath: string;
  fileType: string;
  fileSize: number;
}> {
  try {
    console.log('Starting attachment upload:', {
      userId,
      missionId,
      fileName: file.name,
      fileSize: file.size,
      fileType: file.type
    });

    const filePath = getMissionAttachmentPath(userId, missionId, file.name);
    const minioPath = filePath.replace(/^missions\//, ''); // Remove prefix for Minio

    // Convert File to Buffer
    const arrayBuffer = await file.arrayBuffer();
    const buffer = Buffer.from(arrayBuffer);

    console.log('Uploading to Minio:', {
      bucket: 'missions',
      key: minioPath,
      contentType: file.type
    });

    await s3Client.send(new PutObjectCommand({
      Bucket: 'missions',
      Key: minioPath,
      Body: buffer,
      ContentType: file.type,
      ACL: 'public-read'
    }));

    console.log('Attachment upload successful:', {
      filePath,
      minioPath
    });

    return {
      filename: file.name,
      filePath,
      fileType: file.type,
      fileSize: file.size
    };
  } catch (error) {
    console.error('Error uploading mission attachment:', {
      error,
      userId,
      missionId,
      fileName: file.name,
      errorType: error instanceof Error ? error.constructor.name : typeof error,
      message: error instanceof Error ? error.message : String(error)
    });
    throw error;
  }
}

// Generate a presigned URL for direct upload to Minio (for logo)
export async function generateMissionLogoUploadUrl(
  userId: string,
  missionId: string,
  fileExtension: string
): Promise<{ uploadUrl: string; filePath: string }> {
  const filePath = getMissionLogoPath(userId, missionId, fileExtension);
  const minioPath = filePath.replace(/^missions\//, '');

  // TODO: Implement presigned URL generation
  // This would require additional AWS SDK functionality
  throw new Error('Presigned URL generation not implemented');
}

// Generate a presigned URL for direct upload to Minio (for attachment)
export async function generateMissionAttachmentUploadUrl(
  userId: string,
  missionId: string,
  filename: string
): Promise<{ uploadUrl: string; filePath: string }> {
  const filePath = getMissionAttachmentPath(userId, missionId, filename);
  const minioPath = filePath.replace(/^missions\//, '');

  // TODO: Implement presigned URL generation
  // This would require additional AWS SDK functionality
  throw new Error('Presigned URL generation not implemented');
}