import { describe, expect, it } from "vitest";
import { activeSequence, createCommand, mediaToTimelineItem } from "../../../packages/editor-core/src";
import { normalizeMediaAsset } from "../../../packages/media-engine/src";
import { createInitialEditorState, editorReducer } from "./store";

const media = normalizeMediaAsset({
  id: "m1",
  name: "clip.mov",
  kind: "video",
  sourcePath: "/tmp/clip.mov",
  fingerprint: "clip",
  duration: 5,
  width: 1920,
  height: 1080,
  hasAudio: true,
  missing: false,
});

describe("editor history v2", () => {
  it("never lets a stale autosave overwrite newer edits", () => {
    let state = createInitialEditorState();
    state = editorReducer(state, { type: "IMPORT_MEDIA", media: [media] });
    const staleSnapshot = state.project;
    const item = mediaToTimelineItem(media, activeSequence(state.project));
    state = editorReducer(state, { type: "APPLY_COMMAND", command: createCommand(state.project, "append", { item }) });
    const latestRevision = state.project.revision;
    state = editorReducer(state, { type: "PROJECT_SAVED", project: staleSnapshot, projectPath: "mobile-project" });
    expect(state.project.revision).toBe(latestRevision);
    expect(activeSequence(state.project).items).toHaveLength(1);
    expect(state.dirty).toBe(true);
  });

  it("undoes and redoes committed edits without recording playhead movement", () => {
    let state = createInitialEditorState();
    state = editorReducer(state, { type: "IMPORT_MEDIA", media: [media] });
    const item = mediaToTimelineItem(media, activeSequence(state.project));
    state = editorReducer(state, { type: "APPLY_COMMAND", command: createCommand(state.project, "append", { item }) });
    const historyLength = state.history.length;
    state = editorReducer(state, { type: "SET_PLAYHEAD", frame: 60 });
    expect(state.history).toHaveLength(historyLength);
    state = editorReducer(state, { type: "UNDO" });
    expect(activeSequence(state.project).items).toHaveLength(0);
    state = editorReducer(state, { type: "REDO" });
    expect(activeSequence(state.project).items).toHaveLength(1);
  });

  it("treats a continuous slider gesture as one undoable edit", () => {
    let state = createInitialEditorState();
    state = editorReducer(state, { type: "IMPORT_MEDIA", media: [media] });
    const item = mediaToTimelineItem(media, activeSequence(state.project));
    state = editorReducer(state, { type: "APPLY_COMMAND", command: createCommand(state.project, "append", { item }) });
    const historyLength = state.history.length;
    state = editorReducer(state, { type: "APPLY_COMMAND", command: createCommand(state.project, "set-item", { itemId: item.id, patch: { transform: { ...item.transform, scale: { ...item.transform.scale, value: 120 } } } }), coalesceKey: `${item.id}:transform:scale` });
    const changed = activeSequence(state.project).items[0];
    state = editorReducer(state, { type: "APPLY_COMMAND", command: createCommand(state.project, "set-item", { itemId: item.id, patch: { transform: { ...changed.transform, scale: { ...changed.transform.scale, value: 135 } } } }), coalesceKey: `${item.id}:transform:scale` });
    expect(state.history).toHaveLength(historyLength + 1);
    expect(activeSequence(state.project).items[0].transform.scale.value).toBe(135);
    state = editorReducer(state, { type: "UNDO" });
    expect(activeSequence(state.project).items[0].transform.scale.value).toBe(100);
  });
});