/**
 * TypeScript types for the hiring/recruitment module.
 * Internal hiring tracker — tracks open positions and applicant pipeline.
 * NOT a public job board.
 */

export type EmploymentType = "full_time" | "part_time" | "casual" | "contractor";
export type PositionStatus = "draft" | "open" | "closed";
export type ApplicantStage = "applied" | "screening" | "interview" | "offer" | "hired" | "rejected";

export interface Position {
  id: string;
  organisation_id: string;
  title: string;
  department_id: string | null;
  description: string | null;
  employment_type: EmploymentType;
  status: PositionStatus;
  created_by: string;
  created_at: string;
}

export interface PositionWithRelations extends Position {
  department: { name: string } | null;
  applicant_count: number;
}

export interface Applicant {
  id: string;
  organisation_id: string;
  job_posting_id: string;
  first_name: string;
  last_name: string;
  email: string;
  phone: string | null;
  resume_url: string | null;
  stage: ApplicantStage;
  notes: string | null;
  created_at: string;
}

export interface CreatePositionInput {
  title: string;
  department_id?: string;
  description?: string;
  employment_type: EmploymentType;
  status: PositionStatus;
}

export interface UpdatePositionInput {
  title?: string;
  department_id?: string | null;
  description?: string | null;
  employment_type?: EmploymentType;
  status?: PositionStatus;
}

export interface CreateApplicantInput {
  job_posting_id: string;
  first_name: string;
  last_name: string;
  email: string;
  phone?: string;
  resume_url?: string;
}

export const EMPLOYMENT_TYPE_LABELS: Record<EmploymentType, string> = {
  full_time: "Full time",
  part_time: "Part time",
  casual: "Casual",
  contractor: "Contractor",
};

export const POSITION_STATUS_LABELS: Record<PositionStatus, string> = {
  draft: "Draft",
  open: "Open",
  closed: "Closed",
};

export const STAGE_LABELS: Record<ApplicantStage, string> = {
  applied: "Applied",
  screening: "Screening",
  interview: "Interview",
  offer: "Offer",
  hired: "Hired",
  rejected: "Rejected",
};

export const STAGE_COLORS: Record<ApplicantStage, string> = {
  applied: "bg-blue-50 text-blue-700 border-blue-200",
  screening: "bg-amber-50 text-amber-700 border-amber-200",
  interview: "bg-purple-50 text-purple-700 border-purple-200",
  offer: "bg-indigo-50 text-indigo-700 border-indigo-200",
  hired: "bg-emerald-50 text-emerald-700 border-emerald-200",
  rejected: "bg-red-50 text-red-700 border-red-200",
};

export const POSITION_STATUS_COLORS: Record<PositionStatus, string> = {
  draft: "bg-gray-100 text-gray-600 border-gray-200",
  open: "bg-teal-50 text-teal-700 border-teal-200",
  closed: "bg-red-50 text-red-700 border-red-200",
};

export function getInitials(first: string, last: string): string {
  return `${first.charAt(0)}${last.charAt(0)}`.toUpperCase();
}