import { s3Client, putObject, generatePresignedUrl, S3_CONFIG, deleteObject } from '@/lib/s3';
import { PutObjectCommand, DeleteObjectCommand } from '@aws-sdk/client-s3';
import { getSignedUrl } from '@aws-sdk/s3-request-presigner';

/**
 * Utilities for mission-related file uploads using Minio
 */

// Generate the mission logo path in Minio
export function getMissionLogoPath(userId: string, missionId: string, fileExtension: string): string {
  // Simplify path to match pages bucket structure
  return `${missionId}/logo${fileExtension}`;
}

// Generate the mission attachment path in Minio
export function getMissionAttachmentPath(userId: string, missionId: string, filename: string): string {
  // Simplify path to match pages bucket structure
  return `${missionId}/attachments/${filename}`;
}

// Upload mission logo to Minio
export async function uploadMissionLogo(
  userId: string, 
  missionId: string, 
  file: File
): Promise<{ filePath: string }> {
  try {
    console.log('=== Starting logo upload process ===');
    console.log('Upload params:', { userId, missionId, fileName: file.name, fileSize: file.size, fileType: file.type });
    
    // Get file extension
    const fileExtension = file.name.substring(file.name.lastIndexOf('.'));
    console.log('File extension:', fileExtension);
    
    // Create file path
    const filePath = getMissionLogoPath(userId, missionId, fileExtension);
    console.log('Generated file path:', filePath);
    
    // Convert file to ArrayBuffer
    console.log('Converting file to buffer...');
    const arrayBuffer = await file.arrayBuffer();
    const buffer = Buffer.from(arrayBuffer);
    console.log('Buffer created, size:', buffer.length);
    
    // Upload to Minio using the pages bucket instead of missions bucket
    console.log('Creating S3 command with bucket:', S3_CONFIG.bucket);
    console.log('S3 config:', { 
      endpoint: S3_CONFIG.endpoint || 'MISSING!',
      region: S3_CONFIG.region || 'MISSING!',
      bucket: S3_CONFIG.bucket || 'MISSING!',
      hasAccessKey: !!S3_CONFIG.accessKey || 'MISSING!',
      hasSecretKey: !!S3_CONFIG.secretKey || 'MISSING!'
    });
    
    // Log the full path being used
    console.log('FULL S3 PATH:', `${S3_CONFIG.endpoint}/${S3_CONFIG.bucket}/${filePath}`);
    
    const command = new PutObjectCommand({
      Bucket: S3_CONFIG.bucket,
      Key: filePath,
      Body: buffer,
      ContentType: file.type,
      // Add ACL for public read access
      ACL: 'public-read',
    });
    
    console.log('Sending upload command to S3/Minio...');
    console.log('Command details:', {
      Bucket: command.input.Bucket,
      Key: command.input.Key,
      ContentType: command.input.ContentType,
      ACL: command.input.ACL,
      ContentLength: buffer.length
    });
    
    try {
      const result = await s3Client.send(command);
      console.log('Upload successful, result:', result);
    } catch (uploadError) {
      console.error('S3 upload error details:', uploadError);
      console.error('Error name:', (uploadError as any).name);
      console.error('Error message:', (uploadError as any).message);
      if ((uploadError as any).$metadata) {
        console.error('Error metadata:', (uploadError as any).$metadata);
      }
      throw uploadError;
    }
    
    console.log('Upload complete, returning file path:', filePath);
    return { filePath };
  } catch (error) {
    console.error('Error uploading mission logo:', error);
    throw new Error('Failed to upload mission logo');
  }
}

// Upload 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 process ===');
    console.log('Upload params:', { userId, missionId, fileName: file.name, fileSize: file.size, fileType: file.type });
    
    // Create file path
    const filePath = getMissionAttachmentPath(userId, missionId, file.name);
    console.log('Generated file path:', filePath);
    
    // Convert file to ArrayBuffer
    console.log('Converting file to buffer...');
    const arrayBuffer = await file.arrayBuffer();
    const buffer = Buffer.from(arrayBuffer);
    console.log('Buffer created, size:', buffer.length);
    
    // Log the full path being used
    console.log('FULL S3 PATH:', `${S3_CONFIG.endpoint}/${S3_CONFIG.bucket}/${filePath}`);
    
    // Upload to Minio using pages bucket
    const command = new PutObjectCommand({
      Bucket: S3_CONFIG.bucket,
      Key: filePath,
      Body: buffer,
      ContentType: file.type,
      // Add ACL for public read access
      ACL: 'public-read',
    });
    
    console.log('Sending upload command to S3/Minio...');
    console.log('Command details:', {
      Bucket: command.input.Bucket,
      Key: command.input.Key,
      ContentType: command.input.ContentType,
      ACL: command.input.ACL,
      ContentLength: buffer.length
    });
    
    try {
      const result = await s3Client.send(command);
      console.log('Upload successful, result:', result);
    } catch (uploadError) {
      console.error('S3 upload error details:', uploadError);
      console.error('Error name:', (uploadError as any).name);
      console.error('Error message:', (uploadError as any).message);
      if ((uploadError as any).$metadata) {
        console.error('Error metadata:', (uploadError as any).$metadata);
      }
      throw uploadError;
    }
    
    return {
      filename: file.name,
      filePath,
      fileType: file.type,
      fileSize: file.size,
    };
  } catch (error) {
    console.error('Error uploading mission attachment:', error);
    throw new Error('Failed to upload mission attachment');
  }
}

// Generate presigned URL for missions bucket
async function generateMissionPresignedUrl(key: string, expiresIn = 3600): Promise<string> {
  try {
    const command = new PutObjectCommand({
      Bucket: S3_CONFIG.bucket,
      Key: key
    });

    return await getSignedUrl(s3Client, command, { expiresIn });
  } catch (error) {
    console.error('Error generating presigned URL for missions bucket:', error);
    throw error;
  }
}

// Generate presigned URL for direct browser upload of mission logo
export async function generateMissionLogoUploadUrl(
  userId: string, 
  missionId: string, 
  fileExtension: string, 
  expiresIn = 3600
): Promise<{ 
  uploadUrl: string, 
  filePath: string 
}> {
  try {
    const filePath = getMissionLogoPath(userId, missionId, fileExtension);
    const uploadUrl = await generateMissionPresignedUrl(filePath, expiresIn);
    
    return { uploadUrl, filePath };
  } catch (error) {
    console.error('Error generating mission logo upload URL:', error);
    throw new Error('Failed to generate upload URL for mission logo');
  }
}

// Generate presigned URL for direct browser upload of mission attachment
export async function generateMissionAttachmentUploadUrl(
  userId: string, 
  missionId: string, 
  filename: string, 
  expiresIn = 3600
): Promise<{ 
  uploadUrl: string, 
  filePath: string 
}> {
  try {
    const filePath = getMissionAttachmentPath(userId, missionId, filename);
    const uploadUrl = await generateMissionPresignedUrl(filePath, expiresIn);
    
    return { uploadUrl, filePath };
  } catch (error) {
    console.error('Error generating mission attachment upload URL:', error);
    throw new Error('Failed to generate upload URL for mission attachment');
  }
}

// Delete object from missions bucket
async function deleteMissionObject(key: string): Promise<boolean> {
  try {
    const command = new DeleteObjectCommand({
      Bucket: S3_CONFIG.bucket,
      Key: key
    });
    
    await s3Client.send(command);
    return true;
  } catch (error) {
    console.error('Error deleting mission object:', error);
    throw error;
  }
}

// Delete mission attachment from Minio
export async function deleteMissionAttachment(filePath: string): Promise<boolean> {
  try {
    await deleteMissionObject(filePath);
    return true;
  } catch (error) {
    console.error('Error deleting mission attachment:', error);
    throw new Error('Failed to delete mission attachment');
  }
}

// Delete mission logo from Minio
export async function deleteMissionLogo(filePath: string): Promise<boolean> {
  try {
    await deleteMissionObject(filePath);
    return true;
  } catch (error) {
    console.error('Error deleting mission logo:', error);
    throw new Error('Failed to delete mission logo');
  }
}