import { getNocoDbConfiguration } from '~/server/utils/nocodb';
import { createSessionManager } from '~/server/utils/session';

export default defineEventHandler(async (event) => {
  console.log('[api/admin/membership-status-fix] POST /api/admin/membership-status-fix');
  
  try {
    // Validate session and require admin privileges
    const sessionManager = createSessionManager();
    const cookieHeader = getCookie(event, 'monacousa-session') ? getHeader(event, 'cookie') : undefined;
    const session = sessionManager.getSession(cookieHeader);
    
    if (!session?.user) {
      throw createError({
        statusCode: 401,
        statusMessage: 'Authentication required'
      });
    }

    if (session.user.tier !== 'admin') {
      throw createError({
        statusCode: 403,
        statusMessage: 'Admin privileges required'
      });
    }

    console.log('[api/admin/membership-status-fix] Authorized admin:', session.user.email);

    const body = await readBody(event);
    const { action, tableId } = body;

    const config = getNocoDbConfiguration();
    
    if (action === 'check') {
      return await checkMembershipStatusField(config, tableId);
    } else if (action === 'fix') {
      return await fixMembershipStatusField(config, tableId);
    } else {
      throw createError({
        statusCode: 400,
        statusMessage: 'Invalid action. Use "check" or "fix"'
      });
    }

  } catch (error: any) {
    console.error('[api/admin/membership-status-fix] Error:', error);
    throw error;
  }
});

async function checkMembershipStatusField(config: any, tableId: string) {
  console.log('[checkMembershipStatusField] Checking membership status field configuration');
  
  try {
    // Get table schema to check the membership_status field configuration
    const tableSchema = await $fetch<any>(`${config.url}/api/v2/tables/${tableId}`, {
      headers: {
        "xc-token": config.token,
      }
    });

    console.log('[checkMembershipStatusField] Table schema fetched');

    // Find the membership_status field
    const membershipStatusField = tableSchema.columns?.find((col: any) => 
      col.column_name === 'membership_status' || col.title === 'Membership Status'
    );

    if (!membershipStatusField) {
      return {
        success: false,
        error: 'Membership Status field not found in table schema',
        tableSchema: tableSchema.columns?.map((col: any) => ({
          name: col.column_name,
          title: col.title,
          uidt: col.uidt
        })) || []
      };
    }

    console.log('[checkMembershipStatusField] Membership Status field found:', {
      column_name: membershipStatusField.column_name,
      title: membershipStatusField.title,
      uidt: membershipStatusField.uidt,
      dtxp: membershipStatusField.dtxp
    });

    // Check if it's a Single Select field and what options are available
    if (membershipStatusField.uidt === 'SingleSelect') {
      const options = membershipStatusField.colOptions?.options || [];
      const allowedValues = options.map((opt: any) => opt.title);
      
      const requiredValues = ['Active', 'Inactive', 'Pending', 'Expired'];
      const missingValues = requiredValues.filter(val => !allowedValues.includes(val));
      
      return {
        success: true,
        fieldType: 'SingleSelect',
        currentOptions: allowedValues,
        requiredOptions: requiredValues,
        missingOptions: missingValues,
        needsFix: missingValues.length > 0,
        fieldId: membershipStatusField.id,
        message: missingValues.length > 0 
          ? `Missing options: ${missingValues.join(', ')}`
          : 'All required options are present'
      };
    } else {
      return {
        success: true,
        fieldType: membershipStatusField.uidt,
        needsFix: false,
        message: `Field type is ${membershipStatusField.uidt}, not SingleSelect. This should work fine.`
      };
    }

  } catch (error: any) {
    console.error('[checkMembershipStatusField] Error:', error);
    return {
      success: false,
      error: error.message || 'Failed to check field configuration'
    };
  }
}

async function fixMembershipStatusField(config: any, tableId: string) {
  console.log('[fixMembershipStatusField] Fixing membership status field configuration');
  
  try {
    // First check the current state
    const checkResult = await checkMembershipStatusField(config, tableId);
    
    if (!checkResult.success) {
      throw new Error(checkResult.error || 'Failed to check field configuration');
    }

    if (!checkResult.needsFix) {
      return {
        success: true,
        message: 'No fix needed - all options are already present',
        currentOptions: checkResult.currentOptions
      };
    }

    if (checkResult.fieldType !== 'SingleSelect') {
      return {
        success: false,
        error: `Cannot fix field type ${checkResult.fieldType}. Only SingleSelect fields can be updated.`
      };
    }

    // Update the field to include all required options
    const fieldId = checkResult.fieldId;
    const currentOptions = checkResult.currentOptions || [];
    const requiredOptions = ['Active', 'Inactive', 'Pending', 'Expired'];
    
    // Create options array with all required values
    const optionsToSet = requiredOptions.map((option, index) => ({
      title: option,
      color: getStatusColor(option),
      order: index + 1
    }));

    console.log('[fixMembershipStatusField] Updating field with options:', optionsToSet);

    // Update the field via NocoDB API
    const updateResult = await $fetch(`${config.url}/api/v2/tables/${tableId}/columns/${fieldId}`, {
      method: 'PATCH',
      headers: {
        "xc-token": config.token,
        "Content-Type": "application/json"
      },
      body: {
        colOptions: {
          options: optionsToSet
        }
      }
    });

    console.log('[fixMembershipStatusField] Field updated successfully');

    return {
      success: true,
      message: 'Membership Status field updated successfully',
      addedOptions: checkResult.missingOptions,
      allOptions: requiredOptions
    };

  } catch (error: any) {
    console.error('[fixMembershipStatusField] Error:', error);
    return {
      success: false,
      error: error.message || 'Failed to fix field configuration'
    };
  }
}

function getStatusColor(status: string): string {
  const colors = {
    'Active': '#22c55e',    // Green
    'Inactive': '#6b7280',  // Gray  
    'Pending': '#f59e0b',   // Yellow
    'Expired': '#ef4444'    // Red
  };
  return colors[status as keyof typeof colors] || '#6b7280';
}