Scoring Methodology

const transitionStrategyScoring = {
  // Does the entity have a published transition plan?
  hasPublishedPlan: {
    maxPoints: 8,
    criteria: [
      { condition: 'Publicly disclosed plan', points: 8 },
      { condition: 'Internal plan only', points: 4 },
      { condition: 'No documented plan', points: 0 }
    ]
  },

  // Is the plan aligned with Paris Agreement?
  parisAlignment: {
    maxPoints: 7,
    criteria: [
      { condition: '1.5°C aligned with SBTi', points: 7 },
      { condition: 'Well-below 2°C', points: 5 },
      { condition: 'NDC aligned only', points: 3 },
      { condition: 'No alignment stated', points: 0 }
    ]
  },

  // Does it cover the entire entity?
  entityWideScope: {
    maxPoints: 5,
    criteria: [
      { condition: 'Entity-wide scope', points: 5 },
      { condition: 'Division/project only', points: 2 },
      { condition: 'Unclear scope', points: 0 }
    ]
  }
};

// Greenwashing penalty calculation (DNSH is separate)
// Rule-based risk score → Penalty mapping
function calculatePenaltyFromRiskScore(riskScore: number): number {
  if (riskScore >= 70) return 20;  // High risk
  if (riskScore >= 40) return 10;  // Medium risk
  if (riskScore >= 20) return 5;   // Low-medium risk
  return 0;                        // Low risk
}

// Final LMA Score = LMA Base Score - Greenwashing Penalty
// DNSH Score is displayed separately (not subtracted from LMA)
function calculateFinalLMAScore(
  lmaBaseScore: number,           // 0-100 from 5 components
  greenwashingPenalty: number     // 0-60 from red flags
): number {
  return Math.max(0, lmaBaseScore - greenwashingPenalty);
}

interface AssessmentScores {
  // LMA Component Scores (0-20 each, 0-100 total)
  lmaBaseScore: number;
  components: {
    transitionStrategy: number;     // 0-20
    useOfProceeds: number;          // 0-20
    projectSelection: number;       // 0-20
    managementOfProceeds: number;   // 0-20
    reporting: number;              // 0-20
  };

  // Greenwashing Assessment
  greenwashingPenalty: number;      // 0-60 points deducted
  greenwashingRisk: 'low' | 'medium' | 'high';

  // DNSH Assessment
  dnshScore: number;                // 0-100
  dnshStatus: 'compliant' | 'partial' | 'non_compliant';

  // Final Score
  overallScore: number;             // lmaBaseScore - greenwashingPenalty
  eligibilityStatus: 'eligible' | 'partial' | 'ineligible';
}

function calculateFinalScore(
  lmaBaseScore: number,
  greenwashingPenalty: number,
  greenwashingRisk: 'low' | 'medium' | 'high'
): { overallScore: number; eligibilityStatus: string } {
  const overallScore = Math.max(0, lmaBaseScore - greenwashingPenalty);

  let eligibilityStatus: string;
  // High greenwashing risk with score >=80 = automatic ineligible
  if (greenwashingRisk === 'high' && overallScore < 80) {
    eligibilityStatus = 'ineligible';
  } else if (overallScore >= 60 && greenwashingRisk !== 'high') {
    eligibilityStatus = 'eligible';
  } else if (overallScore >= 30) {
    eligibilityStatus = 'partial';
  } else {
    eligibilityStatus = 'ineligible';
  }

  return { overallScore, eligibilityStatus };
}