import { SDKState, CheckpointStatus } from './types'

// =============================================================================
// LOCAL CHECKPOINT VALIDATION
// =============================================================================

/**
 * Performs local (client-side) checkpoint validation against the current SDK state.
 * Returns a CheckpointStatus with errors/warnings populated.
 */
export function validateCheckpointLocally(
  checkpointId: string,
  state: SDKState
): CheckpointStatus {
  const status: CheckpointStatus = {
    checkpointId,
    passed: true,
    validatedAt: new Date(),
    validatedBy: 'SYSTEM',
    errors: [],
    warnings: [],
  }

  switch (checkpointId) {
    case 'CP-PROF':
      if (!state.companyProfile || !state.companyProfile.isComplete) {
        status.passed = false
        status.errors.push({
          ruleId: 'prof-complete',
          field: 'companyProfile',
          message: 'Unternehmensprofil muss vollständig ausgefüllt werden',
          severity: 'ERROR',
        })
      }
      break

    case 'CP-UC':
      if (state.useCases.length === 0) {
        status.passed = false
        status.errors.push({
          ruleId: 'uc-min-count',
          field: 'useCases',
          message: 'Mindestens ein Anwendungsfall muss erstellt werden',
          severity: 'ERROR',
        })
      }
      break

    case 'CP-SCAN':
      if (!state.screening || state.screening.status !== 'COMPLETED') {
        status.passed = false
        status.errors.push({
          ruleId: 'scan-complete',
          field: 'screening',
          message: 'Security Scan muss abgeschlossen sein',
          severity: 'ERROR',
        })
      }
      break

    case 'CP-MOD':
      if (state.modules.length === 0) {
        status.passed = false
        status.errors.push({
          ruleId: 'mod-min-count',
          field: 'modules',
          message: 'Mindestens ein Modul muss zugewiesen werden',
          severity: 'ERROR',
        })
      }
      break

    case 'CP-RISK': {
      const criticalRisks = state.risks.filter(
        r => r.severity === 'CRITICAL' || r.severity === 'HIGH'
      )
      const unmitigatedRisks = criticalRisks.filter(
        r => r.mitigation.length === 0
      )
      if (unmitigatedRisks.length > 0) {
        status.passed = false
        status.errors.push({
          ruleId: 'critical-risks-mitigated',
          field: 'risks',
          message: `${unmitigatedRisks.length} kritische Risiken ohne Mitigationsmaßnahmen`,
          severity: 'ERROR',
        })
      }
      break
    }
  }

  return status
}