// ─── Pipeline Stages ─────────────────────────────────────────────────────────

export const PIPELINE_STAGES = [
  'open',
  'details_sent',
  'in_communication',
  'eoi_sent',
  'eoi_signed',
  'deposit_10pct',
  'contract_sent',
  'contract_signed',
  'completed',
] as const;

export type PipelineStage = (typeof PIPELINE_STAGES)[number];

export const STAGE_LABELS: Record<PipelineStage, string> = {
  open: 'Open',
  details_sent: 'Details Sent',
  in_communication: 'In Comms',
  eoi_sent: 'EOI Sent',
  eoi_signed: 'EOI Signed',
  deposit_10pct: 'Deposit 10%',
  contract_sent: 'Contract Sent',
  contract_signed: 'Contract Signed',
  completed: 'Completed',
};

export const STAGE_BADGE: Record<PipelineStage, string> = {
  open: 'bg-slate-100 text-slate-700',
  details_sent: 'bg-blue-100 text-blue-700',
  in_communication: 'bg-sky-100 text-sky-700',
  eoi_sent: 'bg-indigo-100 text-indigo-700',
  eoi_signed: 'bg-amber-100 text-amber-700',
  deposit_10pct: 'bg-orange-100 text-orange-700',
  contract_sent: 'bg-yellow-100 text-yellow-700',
  contract_signed: 'bg-green-100 text-green-700',
  completed: 'bg-emerald-100 text-emerald-700',
};

export const STAGE_DOT: Record<PipelineStage, string> = {
  open: 'bg-slate-400',
  details_sent: 'bg-blue-500',
  in_communication: 'bg-sky-500',
  eoi_sent: 'bg-indigo-500',
  eoi_signed: 'bg-amber-500',
  deposit_10pct: 'bg-orange-500',
  contract_sent: 'bg-yellow-500',
  contract_signed: 'bg-green-500',
  completed: 'bg-emerald-500',
};

// Default revenue-forecast probability weights per stage (0–1).
// Editable per port via settings (`pipeline_weights`); these are the fallbacks.
export const STAGE_WEIGHTS: Record<PipelineStage, number> = {
  open: 0.05,
  details_sent: 0.1,
  in_communication: 0.2,
  eoi_sent: 0.4,
  eoi_signed: 0.6,
  deposit_10pct: 0.75,
  contract_sent: 0.85,
  contract_signed: 0.95,
  completed: 1.0,
};

// Allowed transitions out of each stage. Used by changeInterestStage to guard
// against accidental skips (e.g. dragging a card from Completed back to Open,
// or jumping Open straight to Completed). Forward moves of 1-2 stages are
// permitted; backward moves are limited to the immediate predecessor unless
// the lifecycle (EOI/contract chain) needs an explicit rewind.
export const STAGE_TRANSITIONS: Record<PipelineStage, readonly PipelineStage[]> = {
  open: ['details_sent', 'in_communication', 'eoi_sent', 'eoi_signed'],
  details_sent: ['open', 'in_communication', 'eoi_sent', 'eoi_signed'],
  in_communication: ['open', 'details_sent', 'eoi_sent', 'eoi_signed'],
  eoi_sent: ['in_communication', 'eoi_signed', 'deposit_10pct'],
  eoi_signed: ['eoi_sent', 'deposit_10pct', 'contract_sent', 'contract_signed'],
  deposit_10pct: ['eoi_signed', 'contract_sent', 'contract_signed'],
  contract_sent: ['eoi_signed', 'deposit_10pct', 'contract_signed'],
  contract_signed: ['contract_sent', 'deposit_10pct', 'completed'],
  completed: ['contract_signed'],
};

export function canTransitionStage(from: string, to: string): boolean {
  if (from === to) return true;
  const fromStage = safeStage(from);
  const toStage = safeStage(to);
  return STAGE_TRANSITIONS[fromStage].includes(toStage);
}

export function safeStage(value: string | null | undefined): PipelineStage {
  return PIPELINE_STAGES.includes(value as PipelineStage) ? (value as PipelineStage) : 'open';
}

export function stageLabel(stage: string | null | undefined): string {
  return STAGE_LABELS[safeStage(stage)];
}

export function stageBadgeClass(stage: string | null | undefined): string {
  return STAGE_BADGE[safeStage(stage)];
}

export function stageDotClass(stage: string | null | undefined): string {
  return STAGE_DOT[safeStage(stage)];
}

// ─── Berth Statuses ──────────────────────────────────────────────────────────

export const BERTH_STATUSES = ['available', 'under_offer', 'sold'] as const;

export type BerthStatus = (typeof BERTH_STATUSES)[number];

// ─── Lead Categories ─────────────────────────────────────────────────────────

export const LEAD_CATEGORIES = ['general_interest', 'specific_qualified', 'hot_lead'] as const;

export type LeadCategory = (typeof LEAD_CATEGORIES)[number];

// ─── Document Types ──────────────────────────────────────────────────────────

export const DOCUMENT_TYPES = ['eoi', 'contract', 'nda', 'reservation_agreement', 'other'] as const;

export type DocumentType = (typeof DOCUMENT_TYPES)[number];

// ─── Document Statuses ───────────────────────────────────────────────────────

export const DOCUMENT_STATUSES = [
  'draft',
  'sent',
  'partially_signed',
  'completed',
  'expired',
  'cancelled',
] as const;

export type DocumentStatus = (typeof DOCUMENT_STATUSES)[number];

// ─── Expense Categories ──────────────────────────────────────────────────────

export const EXPENSE_CATEGORIES = [
  'fuel',
  'maintenance',
  'cleaning',
  'docking',
  'insurance',
  'utilities',
  'marina_fees',
  'repairs',
  'equipment',
  'crew',
  'administration',
  'marketing',
  'travel',
  'entertainment',
  'other',
] as const;

export type ExpenseCategory = (typeof EXPENSE_CATEGORIES)[number];

// ─── Payment Methods ─────────────────────────────────────────────────────────

export const PAYMENT_METHODS = [
  'bank_transfer',
  'credit_card',
  'debit_card',
  'cash',
  'cheque',
  'crypto',
  'other',
] as const;

export type PaymentMethod = (typeof PAYMENT_METHODS)[number];

// ─── Notification Types ──────────────────────────────────────────────────────

export const NOTIFICATION_TYPES = [
  // Interest / pipeline
  'interest_stage_changed',
  'interest_created',
  'interest_assigned',
  // Documents
  'document_sent',
  'document_signed',
  'document_completed',
  'document_expired',
  'document_reminder',
  // Reminders
  'reminder_due',
  'reminder_overdue',
  'reminder_assigned',
  // Financial
  'invoice_sent',
  'invoice_paid',
  'invoice_overdue',
  // Notes
  'mention',
  // Email
  'email_received',
  // System
  'system_alert',
  'job_failed',
  'bulk_operation_complete',
  'export_ready',
  // Berths
  'berth_status_changed',
  'berth_waiting_list_update',
] as const;

export type NotificationType = (typeof NOTIFICATION_TYPES)[number];