import { serve } from "https://deno.land/std@0.190.0/http/server.ts";
import { createEdgeFunction, type EdgeFunctionContext } from '../_shared/edgeFunctionWrapper.ts';
import { corsHeaders } from '../_shared/cors.ts';
import { addSpanEvent } from '../_shared/logger.ts';

interface RequestBody {
  submission_id: string;
  user_id: string;
  submission_type: string;
  status: 'approved' | 'rejected';
  reviewer_notes?: string;
}

async function constructEntityURL(
  supabase: any,
  submissionType: string,
  itemData: any
): Promise<string> {
  const baseURL = 'https://www.thrillwiki.com';
  
  if (submissionType === 'park') {
    const parkSlug = itemData.slug;
    return `${baseURL}/parks/${parkSlug}`;
  }
  
  if (submissionType === 'ride') {
    const rideSlug = itemData.slug;
    const parkId = itemData.park_id;
    
    if (!parkId) {
      return `${baseURL}/rides/${rideSlug}`;
    }
    
    // Fetch park slug
    const { data: park } = await supabase
      .from('parks')
      .select('slug')
      .eq('id', parkId)
      .maybeSingle();
    
    const parkSlug = park?.slug || 'unknown';
    return `${baseURL}/parks/${parkSlug}/rides/${rideSlug}`;
  }
  
  if (submissionType === 'company') {
    const companySlug = itemData.slug;
    const companyType = itemData.company_type;
    
    if (companyType === 'manufacturer') {
      return `${baseURL}/manufacturers/${companySlug}`;
    } else if (companyType === 'operator') {
      return `${baseURL}/operators/${companySlug}`;
    } else if (companyType === 'property_owner') {
      return `${baseURL}/owners/${companySlug}`;
    } else if (companyType === 'designer') {
      return `${baseURL}/designers/${companySlug}`;
    }
    return `${baseURL}/companies/${companySlug}`;
  }
  
  if (submissionType === 'ride_model') {
    const modelSlug = itemData.slug;
    const manufacturerId = itemData.manufacturer_id;
    
    if (!manufacturerId) {
      return `${baseURL}/models/${modelSlug}`;
    }
    
    // Fetch manufacturer slug
    const { data: manufacturer } = await supabase
      .from('companies')
      .select('slug')
      .eq('id', manufacturerId)
      .eq('company_type', 'manufacturer')
      .maybeSingle();
    
    const manufacturerSlug = manufacturer?.slug || 'unknown';
    return `${baseURL}/manufacturers/${manufacturerSlug}/models/${modelSlug}`;
  }
  
  return `${baseURL}`;
}

const handler = async (req: Request, { supabase, span, requestId }: EdgeFunctionContext) => {
  const { submission_id, user_id, submission_type, status, reviewer_notes } = await req.json() as RequestBody;

  addSpanEvent(span, 'notification_request', { 
    submissionId: submission_id, 
    userId: user_id,
    status 
  });

  // Fetch submission items to get entity data
  const { data: items, error: itemsError } = await supabase
    .from('submission_items')
    .select('item_data')
    .eq('submission_id', submission_id)
    .order('order_index', { ascending: true })
    .limit(1)
    .maybeSingle();

  if (itemsError) {
    throw new Error(`Failed to fetch submission items: ${itemsError.message}`);
  }

  if (!items || !items.item_data) {
    throw new Error('No submission items found');
  }

  // Extract entity data
  const entityName = items.item_data.name || 'your submission';
  const entityType = submission_type.replace('_', ' ');
  
  // Construct entity URL
  const entityURL = await constructEntityURL(supabase, submission_type, items.item_data);

  // Determine workflow and build payload based on status
  const workflowId = status === 'approved' ? 'submission-approved' : 'submission-rejected';
  
  let payload: Record<string, string>;
  
  if (status === 'approved') {
    payload = {
      baseUrl: 'https://www.thrillwiki.com',
      entityType,
      entityName,
      submissionId: submission_id,
      entityURL,
      moderationNotes: reviewer_notes || '',
    };
  } else {
    payload = {
      baseUrl: 'https://www.thrillwiki.com',
      rejectionReason: reviewer_notes || 'No reason provided',
      entityType,
      entityName,
      entityURL,
      actualStatus: 'rejected',
    };
  }

  // Generate idempotency key for duplicate prevention
  const { data: keyData, error: keyError } = await supabase
    .rpc('generate_notification_idempotency_key', {
      p_notification_type: `submission_${status}`,
      p_entity_id: submission_id,
      p_recipient_id: user_id,
    });

  const idempotencyKey = keyData || `user_sub_${submission_id}_${user_id}_${status}_${Date.now()}`;

  // Check for duplicate within 24h window
  const { data: existingLog, error: logCheckError } = await supabase
    .from('notification_logs')
    .select('id')
    .eq('user_id', user_id)
    .eq('idempotency_key', idempotencyKey)
    .gte('created_at', new Date(Date.now() - 24 * 60 * 60 * 1000).toISOString())
    .maybeSingle();

  if (existingLog) {
    // Duplicate detected - log and skip
    await supabase.from('notification_logs').update({
      is_duplicate: true
    }).eq('id', existingLog.id);

    addSpanEvent(span, 'duplicate_notification_prevented', { 
      idempotencyKey,
      submissionId: submission_id
    });

    return {
      success: true,
      message: 'Duplicate notification prevented',
      idempotencyKey,
    };
  }

  addSpanEvent(span, 'sending_notification', { 
    workflowId, 
    entityName,
    idempotencyKey
  });

  // Call trigger-notification function
  const { data: notificationResult, error: notificationError } = await supabase.functions.invoke(
    'trigger-notification',
    {
      body: {
        workflowId,
        subscriberId: user_id,
        payload,
      },
    }
  );

  if (notificationError) {
    throw new Error(`Failed to trigger notification: ${notificationError.message}`);
  }

  // Log notification in notification_logs with idempotency key
  await supabase.from('notification_logs').insert({
    user_id,
    notification_type: `submission_${status}`,
    idempotency_key: idempotencyKey,
    is_duplicate: false,
    metadata: {
      submission_id,
      submission_type,
      transaction_id: notificationResult?.transactionId
    }
  });

  addSpanEvent(span, 'notification_sent', { 
    transactionId: notificationResult?.transactionId 
  });

  return {
    success: true,
    transactionId: notificationResult?.transactionId,
  };
};

serve(createEdgeFunction({
  name: 'notify-user-submission-status',
  requireAuth: false,
  useServiceRole: true,
  corsHeaders,
  enableTracing: true,
  logRequests: true,
}, handler));