// src/data/lifecycle.js
// The project lifecycle state machine (Master §9). Pure constants + helpers; no React.

// Ordered linear stages. 'Rework In Progress' is an off-line regression state (entered on a failed
// final inspection), so it is NOT in the linear order array — handle it explicitly.
export const LIFECYCLE_STAGES = [
  'Lead',
  'Damage Inspection Scheduled',
  'Damage Verified',
  'Scope Approved',
  'Contract Signed',
  'Work In Progress',
  'Work Complete — Awaiting Inspection',
  'Final Inspection Scheduled',
  'Final Inspection In Progress',
  'Project Completed',
  'Final Payment Received — Closed',
];

export const REWORK_STAGE = 'Rework In Progress';

// Stage → canonical progress %. Advancing to a stage sets the project's completionPercentage to this.
export const STAGE_PROGRESS = {
  'Lead': 5,
  'Damage Inspection Scheduled': 10,
  'Damage Verified': 20,
  'Scope Approved': 30,
  'Contract Signed': 40,
  'Work In Progress': 55,
  'Work Complete — Awaiting Inspection': 80,
  'Final Inspection Scheduled': 85,
  'Final Inspection In Progress': 90,
  'Rework In Progress': 75,
  'Project Completed': 95,
  'Final Payment Received — Closed': 100,
};

export const stageToPct = (stage) => STAGE_PROGRESS[stage] ?? 0;

export const nextStage = (stage) => {
  if (stage === REWORK_STAGE) return 'Final Inspection Scheduled'; // rework re-enters inspection
  const i = LIFECYCLE_STAGES.indexOf(stage);
  return i >= 0 && i < LIFECYCLE_STAGES.length - 1 ? LIFECYCLE_STAGES[i + 1] : stage;
};

export const prevStage = (stage) => {
  const i = LIFECYCLE_STAGES.indexOf(stage);
  return i > 0 ? LIFECYCLE_STAGES[i - 1] : stage;
};

// Is this stage at/after a reference stage? (for gating UI like "can schedule final inspection")
export const isAtOrAfter = (stage, ref) =>
  LIFECYCLE_STAGES.indexOf(stage) >= LIFECYCLE_STAGES.indexOf(ref);