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

import {
  areClarificationAnswersComplete,
  buildPreflightClarificationQuestions,
  normalizeAgentLocale,
  normalizeAgentExecutionPlan,
  normalizeAgentBriefConstraints,
  normalizeAgentOutputDraft,
  type AgentClarificationAnswerMap,
  type AgentClarificationQuestion,
  type AgentBriefConstraints,
  type AgentExecutionPlan,
} from "@/lib/agent-run-contract";

describe("agent run contract helpers", () => {
  describe("areClarificationAnswersComplete", () => {
    it("returns true when every required question has a non-empty answer", () => {
      const questions: AgentClarificationQuestion[] = [
        { id: "goal", prompt: "What is the goal?", required: true },
        { id: "tone", prompt: "Preferred tone?", required: false },
        { id: "audience", prompt: "Who is the audience?", required: true },
      ];

      const answers: AgentClarificationAnswerMap = {
        goal: "Generate launch captions",
        audience: "SaaS founders",
      };

      expect(areClarificationAnswersComplete(questions, answers)).toBe(true);
    });

    it("returns false when a required question is missing", () => {
      const questions: AgentClarificationQuestion[] = [
        { id: "goal", prompt: "What is the goal?", required: true },
        { id: "audience", prompt: "Who is the audience?", required: true },
      ];

      const answers: AgentClarificationAnswerMap = {
        goal: "Generate launch captions",
      };

      expect(areClarificationAnswersComplete(questions, answers)).toBe(false);
    });

    it("returns false when required answers are blank after trimming", () => {
      const questions: AgentClarificationQuestion[] = [
        { id: "goal", prompt: "What is the goal?", required: true },
      ];

      const answers: AgentClarificationAnswerMap = {
        goal: "   ",
      };

      expect(areClarificationAnswersComplete(questions, answers)).toBe(false);
    });
  });

  describe("normalizeAgentOutputDraft", () => {
    it("trims draft fields and keeps non-empty values", () => {
      const normalized = normalizeAgentOutputDraft({
        title: "  Launch Caption Pack  ",
        channel: "  Instagram Feed  ",
        outputType: "  caption-package  ",
        body: "  3 variants with hook-first copy.  ",
      });

      expect(normalized).toEqual({
        title: "Launch Caption Pack",
        channel: "Instagram Feed",
        outputType: "caption-package",
        body: "3 variants with hook-first copy.",
      });
    });

    it("uses safe fallback values and guarantees body string", () => {
      const normalized = normalizeAgentOutputDraft({
        title: "   ",
        channel: "",
        outputType: "   ",
      });

      expect(normalized).toEqual({
        title: "Untitled",
        channel: "general",
        outputType: "text",
        body: "",
      });
    });

    it("coerces non-string body values to empty string", () => {
      const normalized = normalizeAgentOutputDraft({
        title: "Recap",
        channel: "Email",
        outputType: "summary",
        body: null as unknown as string,
      });

      expect(normalized.body).toBe("");
    });
  });

  describe("normalizeAgentExecutionPlan", () => {
    it("trims summary and step metadata while preserving valid values", () => {
      const normalized = normalizeAgentExecutionPlan({
        summary: "  Ship a launch kit  ",
        steps: [
          {
            id: "  STEP-1  ",
            title: "  Instagram captions  ",
            channel: "  Instagram  ",
            outputType: "  caption-pack  ",
          },
        ],
      });

      expect(normalized).toEqual<AgentExecutionPlan>({
        summary: "Ship a launch kit",
        steps: [
          {
            id: "step-1",
            title: "Instagram captions",
            channel: "Instagram",
            outputType: "caption-pack",
            artifactType: "caption-pack",
            goal: "Deliver channel-ready output.",
            requiredSections: [],
            qualityChecks: [],
          },
        ],
      });
    });

    it("falls back to safe defaults for invalid payloads", () => {
      const normalized = normalizeAgentExecutionPlan({
        summary: null,
        steps: [
          {
            id: "",
            title: "",
            channel: "   ",
            outputType: undefined,
          },
          null,
        ],
      });

      expect(normalized).toEqual<AgentExecutionPlan>({
        summary: "",
        steps: [
          {
            id: "step-1",
            title: "Untitled",
            channel: "general",
            outputType: "text",
            artifactType: "text",
            goal: "Deliver channel-ready output.",
            requiredSections: [],
            qualityChecks: [],
          },
        ],
      });
    });

    it("deduplicates step ids and creates deterministic fallback ids", () => {
      const normalized = normalizeAgentExecutionPlan({
        summary: "ready",
        steps: [
          {
            id: "step",
            title: "One",
            channel: "email",
            outputType: "copy",
          },
          {
            id: "step",
            title: "Two",
            channel: "x",
            outputType: "thread",
          },
          {
            id: "",
            title: "Three",
            channel: "linkedin",
            outputType: "post",
          },
        ],
      });

      expect(normalized.steps.map((step) => step.id)).toEqual(["step", "step-2", "step-3"]);
    });

    it("normalizes enriched execution-step fields with deterministic array handling", () => {
      const normalized = normalizeAgentExecutionPlan({
        summary: "ready",
        steps: [
          {
            id: "main",
            title: "Deliver",
            channel: "linkedin",
            outputType: "post",
            artifactType: " social-caption-pack ",
            goal: "  Explain launch value  ",
            requiredSections: ["Hook", "CTA", "Hook", "  "],
            qualityChecks: ["fits_tone", "fits_tone", "references_context", ""],
          },
        ],
      });

      expect(normalized.steps[0]).toEqual({
        id: "main",
        title: "Deliver",
        channel: "linkedin",
        outputType: "post",
        artifactType: "social-caption-pack",
        goal: "Explain launch value",
        requiredSections: ["Hook", "CTA"],
        qualityChecks: ["fits_tone", "references_context"],
      });
    });

    it("keeps compatibility by falling back artifactType to outputType", () => {
      const normalized = normalizeAgentExecutionPlan({
        summary: "ready",
        steps: [
          {
            id: "legacy",
            title: "Legacy step",
            channel: "email",
            outputType: "newsletter-copy",
          },
        ],
      });

      expect(normalized.steps[0]?.artifactType).toBe("newsletter-copy");
    });
  });

  describe("normalizeAgentBriefConstraints", () => {
    it("trims fields and normalizes target channels", () => {
      const normalized = normalizeAgentBriefConstraints({
        briefing: "  Build a launch sequence  ",
        audience: "  SaaS founders  ",
        tone: "  concise  ",
        targetChannels: ["  Email  ", "", "LinkedIn", "email", "   "],
        hardConstraints: [
          "  Do not mention pricing  ",
          "",
          "Keep under 120 words",
          "Keep under 120 words",
        ],
      });

      expect(normalized).toEqual<AgentBriefConstraints>({
        briefing: "Build a launch sequence",
        audience: "SaaS founders",
        tone: "concise",
        targetChannels: ["email", "linkedin"],
        hardConstraints: ["Do not mention pricing", "Keep under 120 words"],
      });
    });

    it("falls back to safe empty values for invalid payloads", () => {
      const normalized = normalizeAgentBriefConstraints({
        briefing: null,
        audience: undefined,
        tone: 3,
        targetChannels: ["   ", null, 1],
        hardConstraints: "must be array",
      });

      expect(normalized).toEqual<AgentBriefConstraints>({
        briefing: "",
        audience: "",
        tone: "",
        targetChannels: [],
        hardConstraints: [],
      });
    });
  });

  describe("buildPreflightClarificationQuestions", () => {
    it("builds deterministic required questions for missing preflight requirements", () => {
      const questions = buildPreflightClarificationQuestions({
        briefConstraints: {
          briefing: "",
          audience: "Founders",
          tone: "confident",
          targetChannels: [],
          hardConstraints: [],
        },
        incomingContextCount: 0,
      });

      expect(questions).toEqual<AgentClarificationQuestion[]>([
        {
          id: "briefing",
          prompt: "What should the agent produce? Provide the brief in one or two sentences.",
          required: true,
        },
        {
          id: "target-channels",
          prompt: "Which channels should this run target? List at least one channel.",
          required: true,
        },
        {
          id: "incoming-context",
          prompt: "No context was provided. What source context should the agent use?",
          required: true,
        },
      ]);
    });

    it("returns an empty list when all preflight requirements are satisfied", () => {
      const questions = buildPreflightClarificationQuestions({
        briefConstraints: {
          briefing: "Create 3 posts",
          audience: "Marketers",
          tone: "friendly",
          targetChannels: ["x"],
          hardConstraints: ["No emojis"],
        },
        incomingContextCount: 2,
      });

      expect(questions).toEqual([]);
    });
  });

  describe("normalizeAgentLocale", () => {
    it("returns supported locale values", () => {
      expect(normalizeAgentLocale("de")).toBe("de");
      expect(normalizeAgentLocale("en")).toBe("en");
    });

    it("falls back to de for unsupported values", () => {
      expect(normalizeAgentLocale("fr")).toBe("de");
      expect(normalizeAgentLocale(undefined)).toBe("de");
      expect(normalizeAgentLocale(null)).toBe("de");
    });
  });
});