import { expect, type Page } from "@playwright/test";
import { buildHostWorkspaceRoute } from "@/utils/host-routes";
import { gotoAppShell } from "./app";
import { openCommandCenter } from "./command-center";
import { openGlobalNewWorkspaceComposer } from "./new-workspace";
import { getServerId } from "./server-id";
import { expectMobileAgentSidebarVisible, openMobileAgentSidebar } from "./sidebar";

const rowTestId = (id: string) => `import-session-session-claude-${id}`;
const rowFolderTestId = (id: string) => `import-session-row-folder-claude-${id}`;

export class ImportSessionFlow {
  constructor(private readonly page: Page) {}
  async openWorkspace(workspaceId: string, viewport: { width: number; height: number }) {
    await this.page.setViewportSize(viewport);
    await gotoAppShell(this.page);
    await this.page.goto(buildHostWorkspaceRoute(getServerId(), workspaceId));
    await expect(this.page.getByRole("button", { name: "Workspace actions" })).toBeVisible({
      timeout: 30_000,
    });
  }
  /** The new workspace screen's Import session button, reached from the sidebar. */
  async revealNewWorkspaceEntryPoint() {
    const compact = (this.page.viewportSize()?.width ?? 0) < 768;
    if (compact) {
      await openMobileAgentSidebar(this.page);
      await expectMobileAgentSidebarVisible(this.page);
    }
    await openGlobalNewWorkspaceComposer(this.page);
    const button = this.page.getByTestId("new-workspace-import-session").filter({ visible: true });
    await expect(button).toHaveAccessibleName("Import session");
    await expect(button).toBeInViewport();
  }
  async openGlobally() {
    await this.revealNewWorkspaceEntryPoint();
    await this.openFromNewWorkspace();
  }
  async openFromNewWorkspace() {
    await this.page.getByTestId("new-workspace-import-session").filter({ visible: true }).click();
    await this.expectSheetReady();
  }
  async openFromWorkspaceHeader() {
    await this.page.getByRole("button", { name: "Workspace actions" }).click();
    await this.page.getByTestId("workspace-header-import-agent").click();
    await this.expectScope("This workspace");
    await expect(this.page.getByTestId("import-session-show-all")).toBeVisible();
    await expect(this.page.getByText("Workspace actions", { exact: true })).not.toBeVisible();
  }
  async expectScope(text: string, exact = true) {
    const scope = this.page.getByTestId("import-session-scope");
    if (exact) await expect(scope).toHaveText(text);
    else await expect(scope).toContainText(text);
    await expect(scope).toBeVisible();
  }
  async expectRows(input: {
    first?: string[];
    before?: [string, string];
    folders?: Array<[string, string]>;
  }) {
    for (const id of input.first ?? input.before ?? []) {
      await expect(this.page.getByTestId(rowTestId(id))).toHaveCount(1);
    }
    const ids = await this.rowIds();
    if (input.first) expect(ids.slice(0, input.first.length)).toEqual(input.first.map(rowTestId));
    if (input.before) {
      expect(ids.indexOf(rowTestId(input.before[0]))).toBeGreaterThanOrEqual(0);
      expect(ids.indexOf(rowTestId(input.before[0]))).toBeLessThan(
        ids.indexOf(rowTestId(input.before[1])),
      );
    }
    for (const [id, folder] of input.folders ?? []) {
      await expect(this.page.getByTestId(rowFolderTestId(id))).toHaveText(folder);
    }
  }
  async expectProviderError(label: string) {
    await expect(this.page.getByTestId("import-session-provider-errors")).toContainText(
      `Could not load ${label} sessions`,
    );
  }
  async expectProviderFilterFits(width: number) {
    await expect(this.page.getByTestId("import-session-scope")).toBeInViewport();
    const filter = this.page.getByRole("button", { name: "Filter: All" });
    await expect(filter).toBeInViewport();
    const bounds = await filter.boundingBox();
    expect(bounds?.x ?? width).toBeGreaterThanOrEqual(0);
    expect((bounds?.x ?? width) + (bounds?.width ?? 1)).toBeLessThanOrEqual(width);
  }
  async revealSession(id: string) {
    const target = this.page.getByTestId(rowTestId(id));
    if ((await target.count()) === 0) {
      await this.scrollList(false);
      await expect(async () => {
        if ((await target.count()) === 0) await this.scrollList(true);
        await expect(target).toHaveCount(1, { timeout: 100 });
      }).toPass({ timeout: 10_000 });
    }
    await target.scrollIntoViewIfNeeded();
    await expect(target).toBeInViewport();
  }
  private async scrollList(forward: boolean) {
    await this.page
      .locator('[data-testid^="import-session-session-"]')
      .first()
      .evaluate((row, advance) => {
        let element = row.parentElement;
        while (element && !["auto", "scroll"].includes(getComputedStyle(element).overflowY))
          element = element.parentElement;
        if (!element) throw new Error("Import list has no scroll owner");
        element.scrollTop = advance ? element.scrollTop + element.clientHeight * 0.8 : 0;
        element.dispatchEvent(new Event("scroll"));
      }, forward);
  }
  async search(query: string) {
    await this.page.getByTestId("import-session-search").fill(query);
    await expect(this.page.getByText("Invoice migration plan", { exact: true })).toBeVisible();
    await expect(this.page.getByText("Root session 01", { exact: true })).toHaveCount(0);
    await expect(this.page.getByTestId("import-session-load-more")).toHaveCount(0);
  }
  async resetSearch() {
    await this.page.getByTestId("import-session-search").fill("");
    await expect(this.page.getByTestId("import-session-load-more")).toBeVisible();
  }
  async loadMore() {
    await this.page.getByTestId("import-session-load-more").click();
    await this.revealSession("fixture-root-20");
    await expect(this.page.getByText("Root session 20", { exact: true })).toBeInViewport();
    await expect(this.page.getByTestId("import-session-load-more")).toHaveCount(0);
  }
  async retryProvider(provider: string, label: string) {
    await this.expectProviderError(label);
    await this.page.getByTestId(`import-session-retry-${provider}`).click();
    await expect(this.page.getByTestId(`import-session-retry-${provider}`)).toBeEnabled();
    await this.expectProviderError(label);
    await expect(this.page.getByRole("progressbar")).toHaveCount(0);
  }
  async importSession(id: string) {
    await this.revealSession(id);
    await this.page.getByTestId(rowTestId(id)).click();
    await expect(this.page.getByTestId("import-session-sheet")).toHaveCount(0, {
      timeout: 30_000,
    });
  }
  async expectTranscript(userText: string, assistantText: string) {
    await expect(this.page.getByTestId("user-message").filter({ visible: true })).toContainText(
      userText,
    );
    await expect(
      this.page.getByTestId("assistant-message").filter({ visible: true }),
    ).toContainText(assistantText);
  }
  async showAll() {
    await this.page.getByTestId("import-session-show-all").click();
    await expect(this.page.getByTestId("import-session-scope")).toContainText("Sessions on");
  }
  async expectImportedIntoWorkspace(workspaceId: string, userText: string) {
    await expect(this.page).toHaveURL(buildHostWorkspaceRoute(getServerId(), workspaceId), {
      timeout: 30_000,
    });
    const workspace = this.page.getByTestId(`workspace-deck-entry-${getServerId()}:${workspaceId}`);
    await expect(workspace.getByTestId("user-message").filter({ visible: true })).toContainText(
      userText,
    );
  }
  async close() {
    await this.page.getByRole("button", { name: "Close", exact: true }).last().click();
    await expect(this.page.getByTestId("import-session-sheet")).toHaveCount(0);
  }
  async expectCommandCenterMatch() {
    const panel = await openCommandCenter(this.page);
    await panel.getByTestId("command-center-input").fill("import");
    await expect(panel.getByText("Import session", { exact: true })).toBeVisible();
    await expect(panel.getByText("Home", { exact: true })).toHaveCount(0);
  }
  private async expectSheetReady() {
    const sheet = this.page.getByTestId("import-session-sheet");
    await expect(sheet).toBeVisible({ timeout: 30_000 });
    await expect(sheet.getByText("Loading sessions...", { exact: true })).toHaveCount(0, {
      timeout: 30_000,
    });
  }
  private async rowIds() {
    return await this.page
      .locator('[data-testid^="import-session-session-claude-"]')
      .evaluateAll((nodes) => nodes.map((node) => node.getAttribute("data-testid")));
  }
}