import { describe, expect, it } from "vitest";

import { buildCopilotSystemPrompt } from "./system-prompt";

import type { DiagramType } from "./types";

describe("buildCopilotSystemPrompt", () => {
  it("should include the diagram type in uppercase", () => {
    const prompt = buildCopilotSystemPrompt("bpmn");
    expect(prompt).toContain("BPMN");
    expect(prompt).toContain("Type: BPMN");
  });

  it("should include diagram description for each type", () => {
    const types: DiagramType[] = [
      "bpmn",
      "er",
      "orgchart",
      "architecture",
      "sequence",
      "flowchart",
    ];

    for (const type of types) {
      const prompt = buildCopilotSystemPrompt(type);
      expect(prompt).toContain(`Type: ${type.toUpperCase()}`);
      expect(prompt).toContain("domaingraph AI copilot");
      expect(prompt).toContain("CHAT-ONLY mode");
    }
  });

  it("should mention chat-only constraint", () => {
    const prompt = buildCopilotSystemPrompt("er");
    expect(prompt).toContain("CHAT-ONLY mode");
    expect(prompt).toContain("cannot modify the diagram directly");
  });

  it("should include today's date", () => {
    const prompt = buildCopilotSystemPrompt("flowchart");
    const year = new Date().getFullYear().toString();
    expect(prompt).toContain(year);
  });

  it("should include ER-specific description", () => {
    const prompt = buildCopilotSystemPrompt("er");
    expect(prompt).toContain("Entity-Relationship");
    expect(prompt).toContain("entities");
  });

  it("should include architecture-specific description", () => {
    const prompt = buildCopilotSystemPrompt("architecture");
    expect(prompt).toContain("services");
    expect(prompt).toContain("databases");
  });
});