/**
 * Update Ticket Step — writes field_changes back to Autotask.
 * Config: {
 *   use_field_changes: boolean  // use context.field_changes
 * }
 */

import { registerWorkflowStepExecutor } from '../ticket-workflow-engine';
import { AutotaskClient } from '../autotask-client';
import { postgresClient } from '../postgres-client';
import { TicketWorkflowStep, WorkflowStepContext, WorkflowStepResult } from '../../types/ticket-workflow';

async function executeUpdateTicket(
  step: TicketWorkflowStep,
  context: WorkflowStepContext,
  _executionId: number
): Promise<WorkflowStepResult> {
  const fieldChanges = context.field_changes || {};
  const changeKeys = Object.keys(fieldChanges);

  if (changeKeys.length === 0) {
    return {
      success: true,
      output: {
        skipped: true,
        reason: 'No field changes to apply'
      }
    };
  }

  // Build Autotask update payload
  const updatePayload: any = {};

  for (const [field, change] of Object.entries(fieldChanges)) {
    updatePayload[field] = change.after;
  }

  // Update in Autotask
  try {
    const autotaskClient = new AutotaskClient({
      apiUrl: process.env.AUTOTASK_API_URL || '',
      username: process.env.AUTOTASK_USERNAME || '',
      password: process.env.AUTOTASK_SECRET || '',
      apiIntegrationCode: process.env.AUTOTASK_API_INTEGRATION_CODE || '',
    });

    await autotaskClient.updateTicket(context.ticket.id, updatePayload);

    // Update local DB copy
    const setClause = Object.keys(fieldChanges)
      .map((field, idx) => `${field} = $${idx + 2}`)
      .join(', ');
    const values = [
      context.ticket.id,
      ...Object.values(fieldChanges).map(c => c.after)
    ];

    if (setClause) {
      await postgresClient.query(
        `UPDATE tickets SET ${setClause}, updated_at = NOW() WHERE id = $1`,
        values
      );
    }

    return {
      success: true,
      output: {
        updated_fields: changeKeys,
        field_changes: fieldChanges,
        autotask_updated: true,
        local_db_updated: true
      }
    };
  } catch (error) {
    console.error('[UPDATE-TICKET] Failed to update Autotask:', error);
    return {
      success: false,
      error: error instanceof Error ? error.message : String(error)
    };
  }
}

registerWorkflowStepExecutor('update_ticket', executeUpdateTicket);