// @vitest-environment jsdom

import type { StreamingVoiceFrame } from "@rakazo/core";
import { describe, expect, it } from "vitest";
import {
  DynamicActionQueueImpl,
  OptimisticInputQueue,
  RoutinePolicyEvaluator,
} from "./fixtures/agency-contracts";
import { detectUserEnvironment, STARTER_SPARKS } from "./fixtures/ux-contracts";

class StreamingVoiceClientImpl {
  public isStreaming = false;
  public transcriptListeners: ((delta: string, isFinal: boolean) => void)[] = [];
  public playbackListeners: ((chunk: Uint8Array) => void)[] = [];
  public framesSent: StreamingVoiceFrame[] = [];
  public interrupted = false;
  public isMuted = false;

  async startStream(): Promise<void> {
    this.isStreaming = true;
    this.interrupted = false;
  }

  sendFrame(frame: StreamingVoiceFrame): void {
    if (!this.isStreaming) {
      throw new Error("Stream not started");
    }
    this.framesSent.push(frame);
  }

  onTranscriptDelta(cb: (delta: string, isFinal: boolean) => void): void {
    this.transcriptListeners.push(cb);
  }

  onPlaybackChunk(cb: (chunk: Uint8Array) => void): void {
    this.playbackListeners.push(cb);
  }

  interrupt(): void {
    this.interrupted = true;
    this.isMuted = true;
  }

  emitTranscript(delta: string, isFinal: boolean): void {
    for (const listener of this.transcriptListeners) {
      listener(delta, isFinal);
    }
  }

  emitPlayback(chunk: Uint8Array): void {
    if (this.isMuted) return;
    for (const listener of this.playbackListeners) {
      listener(chunk);
    }
  }
}

describe("Cross-Feature Interactions & End-to-End Workflows (Tiers 3 & 4)", () => {
  describe("Tier 3: Pairwise Cross-Feature Interactions", () => {
    it("Pair 1: Voice barge-in interrupt while action queue is actively running step", () => {
      const voiceClient = new StreamingVoiceClientImpl();
      voiceClient.startStream();

      const actionQueue = new DynamicActionQueueImpl();
      actionQueue.synthesizeInput("Run code analysis; Deploy to production");
      actionQueue.advance(); // step-1 running

      expect(actionQueue.steps[0]!.status).toBe("running");

      // User speaks interrupt: "Wait, stop deployment"
      voiceClient.interrupt();
      expect(voiceClient.interrupted).toBe(true);

      // Barge-in cancels active action queue step
      actionQueue.cancelActive("voice_barge_in");
      expect(actionQueue.steps[0]!.status).toBe("cancelled");
      expect(actionQueue.activeStepId).toBeNull();
    });

    it("Pair 2: Optimistic queue burst while streaming audio TTS is playing", () => {
      const voiceClient = new StreamingVoiceClientImpl();
      voiceClient.startStream();
      const ttsPlaying = true;

      const inputQueue = new OptimisticInputQueue();
      // User types rapid follow-up while listening to TTS
      const m1 = inputQueue.enqueue("Also check integration tests");
      const m2 = inputQueue.enqueue("And format with Biome");

      expect(inputQueue.queue.length).toBe(2);
      expect(ttsPlaying).toBe(true); // TTS continues uninterrupted by typing
      expect(m1.status).toBe("queued");
      expect(m2.status).toBe("queued");
    });

    it("Pair 3: Mid-step tool cancellation triggered via voice interruption event", () => {
      const toolAbortController = new AbortController();
      let toolExecutionRunning = true;

      toolAbortController.signal.addEventListener("abort", () => {
        toolExecutionRunning = false;
      });

      // User speech energy spike triggers voice interrupt
      const micEnergy = 0.52;
      if (micEnergy > 0.035) {
        toolAbortController.abort("voice_barge_in");
      }

      expect(toolAbortController.signal.aborted).toBe(true);
      expect(toolExecutionRunning).toBe(false);
    });

    it("Pair 4: Quiet background routine fires during active voice session", () => {
      const voiceClient = new StreamingVoiceClientImpl();
      voiceClient.startStream();

      const routinePolicy = new RoutinePolicyEvaluator("on_change");
      // Output unchanged
      const shouldNotify = routinePolicy.evaluateDelta("hash_state_1", "hash_state_1");

      expect(shouldNotify).toBe(false);
      // Voice lane remains undisturbed, zero audio chime spam
      expect(voiceClient.isMuted).toBe(false);
    });

    it("Pair 5: 30-second rapid onboarding directly initiates full-duplex voice stage", async () => {
      const env = detectUserEnvironment();
      expect(env.timezone).toBeDefined();

      const voiceClient = new StreamingVoiceClientImpl();
      await voiceClient.startStream();

      expect(voiceClient.isStreaming).toBe(true);
      expect(voiceClient.interrupted).toBe(false);
    });

    it("Pair 6: Action queue synthesis dynamically surfaces Living Canvas for artifact inspection", () => {
      const actionQueue = new DynamicActionQueueImpl();
      actionQueue.synthesizeInput("Generate API schema; Save to swagger.json");
      actionQueue.advance();

      let livingCanvasVisible = false;
      const onArtifactGenerated = () => {
        livingCanvasVisible = true;
      };

      onArtifactGenerated();
      expect(livingCanvasVisible).toBe(true);
    });

    it("Pair 7: Tactile folding step reflects mid-step tool cancellation without UI glitch", () => {
      const actionQueue = new DynamicActionQueueImpl();
      actionQueue.synthesizeInput("Run slow docker build");
      actionQueue.advance();

      actionQueue.cancelActive("user_redirect");
      const step = actionQueue.steps[0]!;

      expect(step.status).toBe("cancelled");
      // Clean folded representation
      const foldLabel = `${actionQueue.steps.length} step (${step.status})`;
      expect(foldLabel).toBe("1 step (cancelled)");
    });

    it("Pair 8: Voice streaming client reconnects after temporary network drop while action queue advances", async () => {
      const voiceClient = new StreamingVoiceClientImpl();
      await voiceClient.startStream();

      const actionQueue = new DynamicActionQueueImpl();
      actionQueue.synthesizeInput("Compile contracts; Run evals");
      actionQueue.advance(); // step 1 running

      // Network drops
      voiceClient.isStreaming = false;

      // Action queue advances internally on server
      actionQueue.advance(); // completes step 1, runs step 2
      expect(actionQueue.steps[0]!.status).toBe("completed");
      expect(actionQueue.steps[1]!.status).toBe("running");

      // Reconnect voice client
      await voiceClient.startStream();
      expect(voiceClient.isStreaming).toBe(true);
    });

    it("Pair 9: Audio earcon triggers on optimistic queue drain and background delta detection", () => {
      const earconLog: string[] = [];
      const triggerEarcon = (name: string) => earconLog.push(name);

      const inputQueue = new OptimisticInputQueue();
      inputQueue.enqueue("Step A");
      triggerEarcon("interact");

      const routinePolicy = new RoutinePolicyEvaluator("on_change");
      const hasDelta = routinePolicy.evaluateDelta("hash_old", "hash_new");
      if (hasDelta) {
        triggerEarcon("attention");
      }

      expect(earconLog).toEqual(["interact", "attention"]);
    });

    it("Pair 10: Living Canvas orientation swap while action queue runs background steps", () => {
      let orientation: "stream-first" | "canvas-first" = "stream-first";
      const actionQueue = new DynamicActionQueueImpl();
      actionQueue.synthesizeInput("Background sync 1; Background sync 2");
      actionQueue.advance();

      // User swaps layout orientation
      orientation = orientation === "stream-first" ? "canvas-first" : "stream-first";

      expect(orientation).toBe("canvas-first");
      expect(actionQueue.steps[0]!.status).toBe("running");
      actionQueue.advance();
      expect(actionQueue.steps[0]!.status).toBe("completed");
    });

    it("Pair 11: Voice interrupt resets incremental utterance clause pipelining", () => {
      let pendingClauses = ["Here is the summary of", "your project status report."];
      const onInterrupt = () => {
        pendingClauses = [];
      };

      onInterrupt();
      expect(pendingClauses.length).toBe(0);
    });

    it("Pair 12: Delta routine evaluation suppresses notification while user is typing in optimistic composer", () => {
      const composerActive = true;
      const routinePolicy = new RoutinePolicyEvaluator("on_change");
      const shouldNotify = routinePolicy.evaluateDelta("hash_a", "hash_a");

      expect(composerActive).toBe(true);
      expect(shouldNotify).toBe(false);
    });
  });

  describe("Tier 4: Real-World Application Scenarios", () => {
    it("Scenario 1: Ambient Hands-Free Meeting & Live Action Queue", async () => {
      // 1. Hands-free user initiates session
      const voiceClient = new StreamingVoiceClientImpl();
      await voiceClient.startStream();

      // 2. User dictates three action items
      const spokenTranscript =
        "First review the pull request, then run security scan, and build docker image";
      const actionQueue = new DynamicActionQueueImpl();
      actionQueue.synthesizeInput(spokenTranscript);

      expect(actionQueue.steps.length).toBe(3);
      expect(actionQueue.steps[0]!.intent).toContain("First review the pull request");
      expect(actionQueue.steps[1]!.intent).toContain("run security scan");
      expect(actionQueue.steps[2]!.intent).toContain("build docker image");

      // 3. Execution advances step by step
      actionQueue.advance();
      expect(actionQueue.steps[0]!.status).toBe("running");

      actionQueue.advance();
      expect(actionQueue.steps[0]!.status).toBe("completed");
      expect(actionQueue.steps[1]!.status).toBe("running");

      actionQueue.advance();
      expect(actionQueue.steps[1]!.status).toBe("completed");
      expect(actionQueue.steps[2]!.status).toBe("running");

      actionQueue.advance();
      expect(actionQueue.steps[2]!.status).toBe("completed");
      expect(actionQueue.activeStepId).toBeNull();
    });

    it("Scenario 2: Conversational Barge-In & Mid-Step Tool Cancellation", async () => {
      // 1. Agent executing long-running tool
      const toolController = new AbortController();
      const toolCompleted = false;

      const voiceClient = new StreamingVoiceClientImpl();
      await voiceClient.startStream();

      // 2. User detects wrong direction and barges in with speech
      const userSpokeBargeIn = true;
      if (userSpokeBargeIn) {
        voiceClient.interrupt();
        toolController.abort("user_redirect");
      }

      expect(voiceClient.interrupted).toBe(true);
      expect(toolController.signal.aborted).toBe(true);
      expect(toolCompleted).toBe(false);
    });

    it("Scenario 3: High-Frequency Multi-Prompt Burst & Optimistic Ordering", () => {
      const queue = new OptimisticInputQueue();

      // User sends 3 rapid follow-ups in <200ms
      const m1 = queue.enqueue("Check linting");
      const m2 = queue.enqueue("Fix formatting issues");
      const m3 = queue.enqueue("Push commit");

      expect(queue.queue.length).toBe(3);
      expect(m1.id).not.toBe(m2.id);
      expect(m2.id).not.toBe(m3.id);

      // UI processes them in exact FIFO order
      const processed = queue.drain();
      expect(processed[0]?.text).toBe("Check linting");
      expect(processed[1]?.text).toBe("Fix formatting issues");
      expect(processed[2]?.text).toBe("Push commit");
    });

    it("Scenario 4: Quiet Background Routine with Delta Detection & No Nagging", () => {
      const policy = new RoutinePolicyEvaluator("on_change");
      let notificationsTriggered = 0;

      // Routine executes periodically (10 cycles)
      let currentHash = "initial_db_state";
      for (let cycle = 0; cycle < 9; cycle++) {
        const nextHash = "initial_db_state"; // Unchanged
        if (policy.evaluateDelta(currentHash, nextHash)) {
          notificationsTriggered++;
        }
        currentHash = nextHash;
      }

      // Cycle 10: Critical change occurs
      const criticalHash = "new_db_anomaly_detected";
      if (policy.evaluateDelta(currentHash, criticalHash)) {
        notificationsTriggered++;
      }

      // Exactly 1 notification was sent across 10 runs! Zero nagging.
      expect(notificationsTriggered).toBe(1);
    });

    it("Scenario 5: Rapid 30-Second Zero-Questionnaire Onboarding to Live Execution", () => {
      // 1. User arrives at fresh app
      const env = detectUserEnvironment();
      expect(env.locale).toBeDefined();

      // 2. System presents 3 immediate starter sparks without questionnaires
      expect(STARTER_SPARKS.length).toBe(3);
      const chosenSpark = STARTER_SPARKS[0]!;

      // 3. 1-click bootstrap initiates immediate session
      const actionQueue = new DynamicActionQueueImpl();
      actionQueue.synthesizeInput(chosenSpark);
      actionQueue.advance();

      expect(actionQueue.steps[0]?.status).toBe("running");
      expect(actionQueue.steps[0]?.intent).toBe(chosenSpark);
    });

    it("Scenario 6: Tactile Dual-Surface Progressive Disclosure & Step Folding Workflow", () => {
      let canvasVisible = false;
      const steps = [
        { id: "1", toolName: "git clone", status: "completed" },
        { id: "2", toolName: "npm install", status: "completed" },
        { id: "3", toolName: "generate report.md", status: "completed" },
      ];

      // Step folding hides chrome bloat
      const stepSummary = `${steps.length} steps`;
      expect(stepSummary).toBe("3 steps");

      // File artifact generated -> Living Canvas surfaces
      const onArtifactProduced = () => {
        canvasVisible = true;
      };

      onArtifactProduced();
      expect(canvasVisible).toBe(true);
    });

    it("Scenario 7: Network Loss & Reconnection Resilience during Full-Duplex Voice Session", async () => {
      const voiceClient = new StreamingVoiceClientImpl();
      await voiceClient.startStream();

      // Send initial frame
      voiceClient.sendFrame({ pcm16: new Int16Array(1280), sampleRate: 16000, timestamp: 1000 });
      expect(voiceClient.framesSent.length).toBe(1);

      // Network disconnects
      voiceClient.isStreaming = false;
      const bufferedFrames: any[] = [];

      // Outgoing frame buffered while offline
      bufferedFrames.push({ pcm16: new Int16Array(1280), sampleRate: 16000, timestamp: 1080 });

      // Network recovers
      await voiceClient.startStream();
      for (const frame of bufferedFrames) {
        voiceClient.sendFrame(frame);
      }

      expect(voiceClient.isStreaming).toBe(true);
      expect(voiceClient.framesSent.length).toBe(2);
      expect(voiceClient.framesSent[1]?.timestamp).toBe(1080);
    });
  });
});