// Canonical SysML metamodel types — adapted from phase-0/src/types.ts
// (the Phase 0 validation that ran 10/10 against the corpus).
//
// See docs/sysml-modeling.md §6 for the design rationale and §3 for what we
// deliberately don't model.

export type BlockKind = "block" | "actor" | "constraint" | "system";

export type PropertyType =
  | { kind: "string" }
  | { kind: "number" }
  | { kind: "boolean" }
  | { kind: "enum"; values: string[] };

export type Multiplicity = "0..1" | "1" | "0..*" | "1..*";

export interface Property {
  id: string;
  name: string;
  type: PropertyType;
  multiplicity: Multiplicity;
  description?: string;
}

export interface Block {
  id: string;
  label: string;
  kind: BlockKind;
  stereotypes: string[];
  properties: Property[];
  description?: string;
}

export type AssociationKind =
  | "association"
  | "composition"
  | "aggregation"
  | "generalization"
  | "constraintApplies";

export interface Association {
  id: string;
  fromBlockId: string;
  toBlockId: string;
  label: string;
  kind: AssociationKind;
  multiplicity?: { from: Multiplicity; to: Multiplicity };
}

export interface Constraint {
  id: string;
  label: string;
  expression: string;
  appliesTo: string[];
}

export type RequirementRelation =
  | { kind: "satisfy"; blockId: string }
  | { kind: "derive"; fromReqId: string }
  | { kind: "verify"; experimentId: string };

export interface Requirement {
  id: string;
  tag: string;
  text: string;
  relations: RequirementRelation[];
}

export interface SysMLModel {
  systemOfInterestId?: string;
  blocks: Block[];
  associations: Association[];
  constraints: Constraint[];
  requirements: Requirement[];
}