/**
 * agentSSEDispatch.test.ts — MX16-ABORT regression suite
 *
 * Verifica abort_reason enum "user_stop" vs "system":
 *   R1: user_stop → toast.success "✓ Task fermato" (non toast.info)
 *   R2: user_stop → eventRuntime.emit NON chiamato
 *   R3: system abort → toast.info + eventRuntime.emit chiamato
 *   R4: abort_reason assente → default user_stop (no eventRuntime)
 *   R5: store.updateStatus("CANCELLED") chiamato sempre
 *
 * Pattern mock: vi.mock() + vi.stubGlobal — identico a backendSchedulerHealth.test.ts
 */
import { describe, it, expect, vi, beforeEach } from "vitest";

// ─── Mock dipendenze PRIMA degli import ──────────────────────────────────────
vi.mock("sonner", () => ({
  toast: Object.assign(vi.fn(), {
    success: vi.fn(),
    info:    vi.fn(),
    error:   vi.fn(),
  }),
}));

vi.mock("@/core/events", () => ({
  eventRuntime: { emit: vi.fn() },
}));

vi.mock("@/lib/streamManager", () => ({
  streamManager: { cancel: vi.fn(), init: vi.fn() },
}));

vi.mock("@/lib/checkpointManager", () => ({
  onTaskEnd:  vi.fn(),
  onStepDone: vi.fn(),
}));

vi.mock("@/lib/buildFailureHandler", () => ({
  handleBuildFailure: vi.fn(),
}));

vi.mock("@/lib/sseActionInferer", () => ({
  inferActionType:   vi.fn(() => "tool_call"),
  inferActionLabel:  vi.fn(() => "Tool"),
  inferActionDetail: vi.fn(() => undefined),
}));

vi.mock("@/lib/agentTelegram", () => ({
  tgNotify: { taskStart: vi.fn(), taskComplete: vi.fn(), taskError: vi.fn() },
}));

// agentSSEState: Maps vuote — _abGoal sarà "" → no auto-retry setTimeout
vi.mock("@/lib/agentSSEState", () => ({
  _taskParams:       new Map(),
  _taskStarted:      new Map(),
  _connectAt:        new Map(),
  _thinkingTimers:   new Map(),
  _taskTimers:       new Map(),
  _streamingBuffer:  new Map(),
  _bufferTimestamps: new Map(),
}));

// useTaskStore: mock singleton per le chiamate interne a handleEvent
vi.mock("@/store/taskStore", () => ({
  useTaskStore: {
    getState: vi.fn(() => ({
      tasks:        [],
      updateStatus: vi.fn(),
      addLog:       vi.fn(),
      addAction:    vi.fn(),
      updateStep:   vi.fn(),
    })),
  },
}));

// ─── Import dopo i mock ──────────────────────────────────────────────────────
import { handleEvent }   from "@/lib/agentSSEDispatch";
import { eventRuntime }  from "@/core/events";
import { toast }         from "sonner";
import type { SSEEvent } from "@/lib/agentSSETypes";

// ─── Helpers ─────────────────────────────────────────────────────────────────
function makeStore(extra: Record<string, unknown> = {}) {
  return {
    updateStatus: vi.fn(),
    addLog:       vi.fn(),
    addAction:    vi.fn(),
    updateStep:   vi.fn(),
    tasks:        [],
    ...extra,
  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  } as any;
}

/** Costruisce un SSEEvent task_aborted con abort_reason opzionale */
function abortEv(abort_reason?: string): SSEEvent {
  return {
    event:  "task_aborted",
    taskId: TASK_ID,
    ...(abort_reason !== undefined && { abort_reason }),
  } as unknown as SSEEvent;
}

const TASK_ID = "test-task-mx16";
const _toast  = toast as unknown as Record<string, ReturnType<typeof vi.fn>>;
const _er     = eventRuntime as unknown as { emit: ReturnType<typeof vi.fn> };

// ─── Suite ────────────────────────────────────────────────────────────────────
describe("agentSSEDispatch — task_aborted MX16-ABORT", () => {
  beforeEach(() => {
    vi.clearAllMocks();
    // reset window.dispatchEvent per verificare no auto-retry
    vi.stubGlobal("dispatchEvent", vi.fn());
  });

  // R1: user_stop → toast.success (non toast.info)
  it("R1: user_stop → toast.success '✓ Task fermato'", () => {
    handleEvent(abortEv("user_stop"), TASK_ID, makeStore());
    expect(_toast.success).toHaveBeenCalledWith(
      "✓ Task fermato",
      expect.objectContaining({ id: "task-aborted-toast" }),
    );
    expect(_toast.info).not.toHaveBeenCalled();
  });

  // R2: user_stop → eventRuntime.emit NON chiamato (stop intenzionale ≠ errore)
  it("R2: user_stop → eventRuntime.emit NON chiamato", () => {
    handleEvent(abortEv("user_stop"), TASK_ID, makeStore());
    expect(_er.emit).not.toHaveBeenCalled();
  });

  // R3: abort_reason:"system" → toast.info + eventRuntime.emit({kind:"task_error"})
  it("R3: system → toast.info + eventRuntime task_error emesso", () => {
    handleEvent(abortEv("system"), TASK_ID, makeStore());
    expect(_toast.info).toHaveBeenCalledWith(
      "Task interrotto — riavvio automatico in corso…",
      expect.objectContaining({ id: "task-aborted-toast" }),
    );
    expect(_er.emit).toHaveBeenCalledWith(
      expect.objectContaining({ kind: "task_error" }),
    );
    expect(_toast.success).not.toHaveBeenCalled();
  });

  // R4: abort_reason assente → default user_stop (no eventRuntime, toast.success)
  it("R4: abort_reason assente → default user_stop (no eventRuntime)", () => {
    handleEvent(abortEv(undefined), TASK_ID, makeStore());
    expect(_er.emit).not.toHaveBeenCalled();
    expect(_toast.success).toHaveBeenCalled();
  });

  // R5: store.updateStatus("CANCELLED") chiamato in entrambi i casi
  it("R5: updateStatus CANCELLED — user_stop", () => {
    const store = makeStore();
    handleEvent(abortEv("user_stop"), TASK_ID, store);
    expect(store.updateStatus).toHaveBeenCalledWith(TASK_ID, "CANCELLED");
  });

  it("R5b: updateStatus CANCELLED — system", () => {
    const store = makeStore();
    handleEvent(abortEv("system"), TASK_ID, store);
    expect(store.updateStatus).toHaveBeenCalledWith(TASK_ID, "CANCELLED");
  });
});