"""End-to-end Playwright tests for the files-overlay file manager.

The files_overlay_server fixture (conftest.py) seeds user "alice"/"secret",
a files-type Overlay owned by alice, and an overlay root pre-populated
with one editable text file, one binary file, and one nested folder.
Each test logs in, opens /overlays/<id>, drives the UI through real
clicks + HTMX swaps, and asserts on DOM + filesystem state.

Running locally: `uv run pytest -m e2e l4d2web/tests/e2e/test_files_overlay.py`.
Requires `uv run playwright install chromium` once.

Pattern model: test_editor.py (CM6 controller flow) + the handoff doc at
docs/superpowers/plans/2026-05-17-files-overlay-e2e-handoff.md.
"""
from __future__ import annotations

import pytest
from playwright.sync_api import Page, expect

from .conftest import login

pytestmark = pytest.mark.e2e


def _open_overlay(page: Page, base_url: str, overlay_id: int) -> None:
    login(page, base_url)
    page.goto(f"{base_url}/overlays/{overlay_id}")


def _wait_for_routed_editor(page: Page) -> None:
    """Wait until the routed modal's CM6 surface is mounted.

    The textarea itself is `display:none` (editor.css pre-hides + CM6's
    mount sets `style.display = "none"`), so we cannot assert visibility
    on it directly. The `.cm-content` element appearing under
    `#files-editor-fragment` is the canonical "editor is ready, the
    `window.__filesEditor` controller is wired" signal.
    """
    expect(page.locator("#files-editor-fragment")).to_be_visible(timeout=5000)
    expect(page.locator("#files-editor-fragment .cm-content")).to_be_visible(timeout=5000)


def test_edit_text_file_save_round_trip(page: Page, files_overlay_server) -> None:
    """Open server.cfg via the file-row name button, drive the CM6
    controller to a new doc, save, and assert the disk reflects it.
    Exercises the full edit path: row click → openRouted → htmx swap →
    CM6 mount → save POST → modal close. Failure modes guarded against:
      * /overlays/<id>/files/edit returns the wrong fragment (textarea
        gets the wrong data-rel-path, or none).
      * editor.js's htmx:afterSwap re-init doesn't fire / fails — then
        window.__filesEditor stays unset and the save reads the stale
        textarea.value instead of the user's edits.
      * routedSaveClicked stops short of closeRouted() — modal stays
        open and the test's hidden-assertion catches it.
      * The POST /files/save endpoint doesn't actually write — covered
        by reading the file back from disk.
    """
    base = files_overlay_server["base_url"]
    overlay_id = files_overlay_server["overlay_id"]
    overlay_root = files_overlay_server["overlay_root"]
    _open_overlay(page, base, overlay_id)

    page.click('button.file-tree-name-button[data-target-path="server.cfg"]')
    _wait_for_routed_editor(page)
    # Sanity: the modal opened for the file we asked for, not some other.
    assert page.locator('textarea[data-rel-path="server.cfg"]').count() == 1

    new_content = 'hostname "edited by e2e"\nmp_gamemode coop\n'
    page.evaluate("(text) => window.__filesEditor.setContent(text)", new_content)

    page.click(".files-editor-save")

    # Modal close is async (await postJson then closeRouted()).
    expect(page.locator("#modal-container")).to_be_hidden(timeout=5000)
    assert (overlay_root / "server.cfg").read_text() == new_content


def test_create_new_file_routed(page: Page, files_overlay_server) -> None:
    """Click `+ new file` at the overlay root, fill the routed
    new-file editor, click Create, and assert the file lands on disk
    AND the row appears in the tree.

    The routed new-file modal is the SAME template as the edit modal
    (overlay_file_editor.html with is_new=True). The differences this
    test exercises:
      * textarea has data-rel-path="" — routedSaveClicked branches on
        the empty value into the "compose fullPath from filename"
        path, not the rename-on-save path.
      * Save button reads "Create", not "Save".
      * scheduleRefresh(parentOf(fullPath)) fires after POST — for a
        root-level file that's refreshFolder("") which re-fetches the
        whole root listing; the new row should appear without a page
        reload.
    """
    base = files_overlay_server["base_url"]
    overlay_id = files_overlay_server["overlay_id"]
    overlay_root = files_overlay_server["overlay_root"]
    _open_overlay(page, base, overlay_id)

    page.click('button[data-action="new-file"][data-target-path=""]')
    _wait_for_routed_editor(page)
    # Confirm the fragment opened in is_new mode (empty rel-path).
    assert page.locator('textarea[data-rel-path=""]').count() == 1

    new_filename = "new-file.cfg"
    new_content = 'sv_cheats 1\nmp_gamemode versus\n'
    page.fill('input[data-editor-filename]', new_filename)
    page.evaluate("(text) => window.__filesEditor.setContent(text)", new_content)

    page.click(".files-editor-save")

    expect(page.locator("#modal-container")).to_be_hidden(timeout=5000)
    assert (overlay_root / new_filename).read_text() == new_content
    # Tree refresh is debounced 50ms then HTMX-fetched — wait for the
    # new row to appear rather than asserting synchronously.
    expect(
        page.locator(f'.file-tree-row-file[data-target-path="{new_filename}"]')
    ).to_be_visible(timeout=5000)