/**
 * @file Sagi.test.tsx
 * @description Render tests for the Sagi companion component — mounting, mood rendering, the ⌘B panel toggle, and accessibility attributes.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

import { describe, it, expect, beforeEach, afterEach, vi } from "vitest";
import {
  render,
  renderHook,
  screen,
  fireEvent,
  act,
  cleanup,
  within,
} from "@testing-library/react";
import { useSagiPosition } from "../useSagiPosition";
import { MemoryRouter } from "react-router-dom";
import { Sagi } from "../Sagi";
import { eventBus } from "../../../lib/eventBus";
import type { WSMessage, Session } from "../../../lib/types";

function renderSagi() {
  return render(
    <MemoryRouter>
      <Sagi />
    </MemoryRouter>
  );
}

const sessionMsg = (id: string, status: Session["status"]): WSMessage => ({
  type: "session_updated",
  data: { id, status } as Session,
  timestamp: "t",
});

beforeEach(() => {
  localStorage.clear();
  eventBus.setConnected(true);
  // Freeze timers so the brain's 1s heartbeat tick can't fire a state update
  // outside act() mid-assertion. We never advance them in these tests.
  vi.useFakeTimers();
});

afterEach(() => {
  cleanup();
  vi.useRealTimers();
});

describe("Sagi widget", () => {
  it("renders the avatar button by default", () => {
    renderSagi();
    expect(screen.getByRole("button", { name: /open sagi companion/i })).toBeInTheDocument();
    expect(screen.getByRole("img", { name: /sagi/i })).toBeInTheDocument();
  });

  it("opens the panel on click and answers a local status question", () => {
    renderSagi();
    fireEvent.click(screen.getByRole("button", { name: /open sagi companion/i }));
    const panel = screen.getByRole("dialog", { name: /sagi companion/i });
    expect(panel).toBeInTheDocument();

    const input = within(panel).getByLabelText(/ask sagi/i);
    fireEvent.change(input, { target: { value: "status" } });
    fireEvent.submit(input.closest("form")!);
    expect(within(panel).getByText(/live ·/i)).toBeInTheDocument();
  });

  it("toggles open/closed with Cmd/Ctrl+B and closes with Esc", () => {
    renderSagi();
    expect(screen.queryByRole("dialog")).not.toBeInTheDocument();
    act(() => {
      fireEvent.keyDown(window, { key: "b", metaKey: true });
    });
    expect(screen.getByRole("dialog")).toBeInTheDocument();
    act(() => {
      fireEvent.keyDown(window, { key: "Escape" });
    });
    expect(screen.queryByRole("dialog")).not.toBeInTheDocument();
  });

  it("shows an error badge when a session errors", () => {
    renderSagi();
    act(() => {
      eventBus.publish(sessionMsg("a", "error"));
    });
    const btn = screen.getByRole("button", { name: /open sagi companion/i });
    expect(within(btn).getByText("1")).toBeInTheDocument();
  });

  it("names the errored session in its bubble and in the panel", () => {
    renderSagi();
    act(() => {
      eventBus.publish({
        type: "session_updated",
        data: { id: "a", status: "error", name: "Fix login", cwd: "/w/app", lane_id: 3 } as Session,
        timestamp: "t",
      });
    });
    const bubble = screen.getByRole("status");
    expect(within(bubble).getByText("Fix login")).toBeInTheDocument();
    expect(within(bubble).getByRole("button", { name: "Open" })).toBeInTheDocument();
    fireEvent.click(screen.getByRole("button", { name: /open sagi companion/i }));
    const panel = screen.getByRole("dialog", { name: /sagi companion/i });
    expect(within(panel).getByText("Needs you")).toBeInTheDocument();
    expect(within(panel).getByRole("button", { name: /Fix login/ })).toBeInTheDocument();
  });

  it("stays quiet about a cleared error when that session updates again", () => {
    renderSagi();
    act(() => {
      eventBus.publish(sessionMsg("a", "error"));
    });
    fireEvent.click(screen.getByRole("button", { name: /open sagi companion/i }));
    fireEvent.click(screen.getByRole("button", { name: "Clear alerts" }));
    act(() => {
      eventBus.publish(sessionMsg("a", "error"));
    });
    const btn = screen.getByRole("button", { name: /close sagi/i, expanded: true });
    expect(within(btn).queryByText("1")).not.toBeInTheDocument();
    expect(JSON.parse(localStorage.getItem("agenthub.pet.dismissedErrors")!)).toEqual(["a"]);
  });

  it("renames the pet from the panel header", () => {
    renderSagi();
    fireEvent.click(screen.getByRole("button", { name: /open sagi companion/i }));
    fireEvent.click(screen.getByRole("button", { name: /rename sagi/i }));
    const input = screen.getByLabelText("Pet name");
    fireEvent.change(input, { target: { value: "Mochi" } });
    fireEvent.keyDown(input, { key: "Enter" });
    expect(screen.getByRole("dialog", { name: /mochi companion/i })).toBeInTheDocument();
    expect(screen.getByLabelText(/ask mochi/i)).toBeInTheDocument();
  });

  it("hands a question it cannot answer to the chat window", () => {
    localStorage.setItem("agenthub.defaultTool", "claude");
    renderSagi();
    fireEvent.click(screen.getByRole("button", { name: /open sagi companion/i }));
    const input = screen.getByLabelText(/ask sagi/i);
    fireEvent.change(input, { target: { value: "write me a haiku" } });
    fireEvent.submit(input.closest("form")!);
    const chat = screen.getByRole("dialog", { name: /chat with sagi/i });
    expect(within(chat).getByText("write me a haiku")).toBeInTheDocument();
    expect(screen.queryByRole("dialog", { name: /sagi companion/i })).not.toBeInTheDocument();
  });

  it("has no Chat button — Ask opens the chat — and Back returns to the panel", () => {
    localStorage.setItem("agenthub.defaultTool", "claude");
    renderSagi();
    fireEvent.click(screen.getByRole("button", { name: /open sagi companion/i }));
    expect(screen.queryByRole("button", { name: /chat with sagi/i })).not.toBeInTheDocument();
    const input = screen.getByLabelText(/ask sagi/i);
    fireEvent.change(input, { target: { value: "write me a haiku" } });
    fireEvent.submit(input.closest("form")!);
    expect(screen.getByRole("dialog", { name: /chat with sagi/i })).toBeInTheDocument();
    fireEvent.click(screen.getByRole("button", { name: "Back" }));
    expect(screen.getByRole("dialog", { name: /sagi companion/i })).toBeInTheDocument();
  });

  it("a pat shows its reaction on the pet even while the panel is open", () => {
    renderSagi();
    fireEvent.click(screen.getByRole("button", { name: /open sagi companion/i }));
    fireEvent.click(screen.getByRole("button", { name: /pat sagi/i }));
    const pet = screen.getByRole("button", { name: /close sagi/i, expanded: true });
    expect(pet.querySelector(".sagi-reaction-text")?.textContent).toBeTruthy();
  });

  it("stroking the pet back and forth pats it", () => {
    renderSagi();
    const pet = screen.getByRole("button", { name: /open sagi companion/i });
    const xs = [100, 130, 100, 130, 100, 130, 100];
    act(() => {
      for (const x of xs) fireEvent.pointerMove(pet, { clientX: x, clientY: 50, buttons: 0 });
    });
    expect(pet.querySelector(".sagi-reaction-text")).not.toBeNull();
  });

  it("reflects the live count in the panel status", () => {
    renderSagi();
    act(() => {
      eventBus.publish(sessionMsg("a", "active"));
      eventBus.publish(sessionMsg("b", "active"));
    });
    fireEvent.click(screen.getByRole("button", { name: /open sagi companion/i }));
    const panel = screen.getByRole("dialog", { name: /sagi companion/i });
    // The "live" stat chip shows value 2 next to its label.
    const liveChip = within(panel).getByText("live").closest("div")!;
    expect(within(liveChip).getByText("2")).toBeInTheDocument();
  });

  it("respects the enabled preference", () => {
    localStorage.setItem("agent-dashboard-sagi-enabled", "false");
    renderSagi();
    expect(screen.queryByRole("button", { name: /open sagi companion/i })).not.toBeInTheDocument();
  });

  it("a tap (no movement) still opens the panel", () => {
    renderSagi();
    const btn = screen.getByRole("button", { name: /open sagi companion/i });
    act(() => {
      fireEvent.pointerDown(btn, { clientX: 990, clientY: 700, button: 0 });
      fireEvent.pointerUp(btn, { clientX: 990, clientY: 700 });
    });
    fireEvent.click(btn);
    expect(screen.getByRole("dialog", { name: /sagi companion/i })).toBeInTheDocument();
  });

  it("dragging snaps to an edge, persists position, and does not open the panel", () => {
    renderSagi();
    const btn = screen.getByRole("button", { name: /open sagi companion/i });
    // Default dock is bottom-right. Drag far to the left past the threshold.
    act(() => {
      fireEvent.pointerDown(btn, { clientX: 990, clientY: 700, button: 0 });
      fireEvent.pointerMove(btn, { clientX: 80, clientY: 300 });
      fireEvent.pointerUp(btn, { clientX: 80, clientY: 300 });
    });
    // The synthetic click that follows a drag must be swallowed.
    fireEvent.click(btn);
    expect(screen.queryByRole("dialog")).not.toBeInTheDocument();
    const saved = JSON.parse(localStorage.getItem("agent-dashboard-sagi-pos") || "{}");
    expect(saved.side).toBe("left");
    expect(typeof saved.y).toBe("number");
  });

  it("a sub-threshold pointer move is treated as a tap, not a drag", () => {
    renderSagi();
    const btn = screen.getByRole("button", { name: /open sagi companion/i });
    act(() => {
      fireEvent.pointerDown(btn, { clientX: 990, clientY: 700, button: 0 });
      fireEvent.pointerMove(btn, { clientX: 992, clientY: 701 }); // < 5px threshold
      fireEvent.pointerUp(btn, { clientX: 992, clientY: 701 });
    });
    fireEvent.click(btn);
    expect(screen.getByRole("dialog", { name: /sagi companion/i })).toBeInTheDocument();
    // No position was persisted because no real drag happened.
    expect(localStorage.getItem("agent-dashboard-sagi-pos")).toBeNull();
  });

  it("restores a persisted left-edge position on mount", () => {
    localStorage.setItem("agent-dashboard-sagi-pos", JSON.stringify({ side: "left", y: 0.2 }));
    renderSagi();
    const btn = screen.getByRole("button", { name: /open sagi companion/i }) as HTMLElement;
    // Left-docked → inline left equals the edge margin (16px).
    expect(btn.style.left).toBe("16px");
  });

  it("Ctrl/Cmd+B is ignored while typing in a field", () => {
    renderSagi();
    const ta = document.createElement("textarea");
    document.body.appendChild(ta);
    ta.focus();
    act(() => {
      fireEvent.keyDown(ta, { key: "b", ctrlKey: true });
    });
    expect(screen.queryByRole("dialog")).not.toBeInTheDocument();
    ta.remove();
  });

  it("Ctrl/Cmd+B is left to the browser while the mascot is hidden", () => {
    localStorage.setItem("agent-dashboard-sagi-enabled", "false");
    renderSagi();
    const ev = new KeyboardEvent("keydown", { key: "b", ctrlKey: true, cancelable: true });
    window.dispatchEvent(ev);
    expect(ev.defaultPrevented).toBe(false);
  });

  it("docks bottom-right above the status bar by default", () => {
    renderSagi();
    const btn = screen.getByRole("button", { name: /open sagi companion/i }) as HTMLElement;
    const top = parseFloat(btn.style.top);
    const size = parseFloat(btn.style.width);
    // Bottom edge sits above the 24px status bar plus the edge margin.
    expect(top + size).toBe(window.innerHeight - 16 - 24);
  });

  it("arrow keys move the focused avatar and persist it", () => {
    renderSagi();
    const btn = screen.getByRole("button", { name: /open sagi companion/i }) as HTMLElement;
    const before = parseFloat(btn.style.top);
    act(() => {
      fireEvent.keyDown(btn, { key: "ArrowUp" });
    });
    expect(parseFloat(btn.style.top)).toBeLessThan(before);
    act(() => {
      fireEvent.keyDown(btn, { key: "ArrowLeft" });
    });
    expect(btn.style.left).toBe("16px");
    expect(JSON.parse(localStorage.getItem("agent-dashboard-sagi-pos") || "{}").side).toBe("left");
  });
});

describe("useSagiPosition moving", () => {
  beforeEach(() => vi.useFakeTimers());
  afterEach(() => vi.useRealTimers());

  it("names the drag's direction and settles once the pointer rests", () => {
    const { result } = renderHook(() => useSagiPosition(68));
    const target = { setPointerCapture() {}, releasePointerCapture() {} };
    const ev = (x: number) =>
      ({ button: 0, pointerId: 1, clientX: x, clientY: 300, currentTarget: target }) as never;
    act(() => result.current.onPointerDown(ev(500)));
    act(() => result.current.onPointerMove(ev(480)));
    expect(result.current.moving).toBe("left");
    act(() => result.current.onPointerMove(ev(520)));
    expect(result.current.moving).toBe("right");
    act(() => vi.advanceTimersByTime(400));
    expect(result.current.moving).toBeNull();
  });
});