/**
 * Scenario: database-view-kanban-drag
 *
 * Verifies that dragging a kanban card from one column to another:
 * 1. Triggers the useUpdateRow mutation (PATCH to bridge).
 * 2. The card appears in the target column.
 * 3. A page reload confirms the new column assignment persists (Baserow updated).
 *
 * @dnd-kit drag simulation: Playwright cannot simulate native HTML5 drag-drop.
 * @dnd-kit uses PointerSensor (pointer events). We simulate this by:
 *   1. pointerdown on the card.
 *   2. pointermove to the target column center (5px+ to activate the sensor).
 *   3. pointerup to drop.
 *
 * The activation constraint in KanbanRenderer is `distance: 5` — so we move
 * at least 10px before releasing.
 */

import { test, expect } from "@playwright/test";
import * as fs from "fs";
import * as path from "path";
import type { BaserowSeed } from "../fixtures/baserow";
import { updateRowViaBaserowApi } from "../fixtures/baserow";

const BASE_URL = process.env.E2E_DOCMOST_URL ?? "http://localhost:5173";
const SEED_FILE = path.resolve(__dirname, "../.auth/baserow-seed.json");

test.describe("database-view kanban drag", () => {
  let seed: BaserowSeed;

  test.beforeAll(() => {
    if (!fs.existsSync(SEED_FILE)) {
      throw new Error(`Seed file not found at ${SEED_FILE}.`);
    }
    seed = JSON.parse(fs.readFileSync(SEED_FILE, "utf-8")) as BaserowSeed;
  });

  test(
    "drag card from Todo column to Done column persists after reload",
    async ({ page, request }) => {
      await page.goto(BASE_URL);

      // Look for the kanban board — it may require navigating to a page that has
      // a kanban database-view node. Depends on insert spec or a pre-created page.
      const kanbanBoard = page
        .getByTestId("kanban-board")
        .or(page.locator("[data-node-type='database-view'] [class*='board']"))
        .first();

      const boardVisible = await kanbanBoard.isVisible({ timeout: 5_000 }).catch(() => false);

      if (!boardVisible) {
        test.skip(
          true,
          "No kanban database-view page found. Create one with viewType=kanban first.",
        );
        return;
      }

      // Locate the "Todo" column and the "Done" column.
      const todoColumn = page
        .getByTestId("kanban-column-Todo")
        .or(page.locator("[class*='column']").filter({ hasText: "Todo" }))
        .first();

      const doneColumn = page
        .getByTestId("kanban-column-Done")
        .or(page.locator("[class*='column']").filter({ hasText: "Done" }))
        .first();

      await todoColumn.waitFor({ state: "visible", timeout: 10_000 });
      await doneColumn.waitFor({ state: "visible", timeout: 10_000 });

      // Find the card for "Task Alpha" (Status: Todo) in the Todo column.
      const card = todoColumn
        .getByTestId(`kanban-card-${seed.rowIds[0]}`)
        .or(todoColumn.getByText("Task Alpha"))
        .first();

      await card.waitFor({ state: "visible", timeout: 10_000 });

      // Perform pointer-based drag to "Done" column.
      const cardBox = await card.boundingBox();
      const doneBox = await doneColumn.boundingBox();

      if (!cardBox || !doneBox) {
        throw new Error("Could not get bounding boxes for drag simulation.");
      }

      const startX = cardBox.x + cardBox.width / 2;
      const startY = cardBox.y + cardBox.height / 2;
      const endX = doneBox.x + doneBox.width / 2;
      const endY = doneBox.y + doneBox.height / 2;

      // Simulate @dnd-kit PointerSensor drag.
      await page.mouse.move(startX, startY);
      await page.mouse.down();

      // Move gradually to exceed the 5px activation threshold.
      const steps = 20;
      for (let i = 1; i <= steps; i++) {
        await page.mouse.move(
          startX + ((endX - startX) * i) / steps,
          startY + ((endY - startY) * i) / steps,
        );
        // Small delay between moves to let the pointer sensor detect.
        await page.waitForTimeout(20);
      }

      await page.mouse.up();

      // The card must now appear in the "Done" column.
      await expect(doneColumn.getByText("Task Alpha")).toBeVisible({
        timeout: 15_000,
      });

      // The "Todo" column must no longer contain "Task Alpha".
      await expect(todoColumn.getByText("Task Alpha")).toBeHidden({
        timeout: 5_000,
      });

      // Reload to confirm persistence.
      await page.reload();

      // Wait for kanban board to re-render.
      await kanbanBoard.waitFor({ state: "visible", timeout: 20_000 });

      // "Task Alpha" must still be in "Done" after reload.
      const doneColumnAfterReload = page
        .getByTestId("kanban-column-Done")
        .or(page.locator("[class*='column']").filter({ hasText: "Done" }))
        .first();

      await expect(doneColumnAfterReload.getByText("Task Alpha")).toBeVisible({
        timeout: 15_000,
      });
    },
  );

  test.afterAll(async ({ request }) => {
    // Restore Task Alpha to "Todo" status.
    if (!seed?.rowIds[0]) return;

    await updateRowViaBaserowApi(request, seed.token, seed.tableId, seed.rowIds[0], {
      [seed.singleSelectFieldName]: "Todo",
    });
  });
});