"""Browser validation for C1 (last-turn spotlight build health) + C2 (up-arrow recall).

No LLM needed. Asserts:

- C1 build health: the freshly-built component loads, the fixture renders into
  window.__cy, and the patch-apply path produces no console errors (the spotlight
  wiring lives in that path; its node-derivation logic is unit-tested in vitest).
- C2 up-arrow recall: typing + Enter records sent messages; ArrowUp/ArrowDown cycle
  them back into the (cleared) composer; the recalled text is what would be sent.

    .venv/Scripts/python.exe scripts/playwright_c1c2.py

Requires `uvicorn loosecanvas.main:app` on APP_PORT (default 8000), built from the
current frontend.
"""

from __future__ import annotations

import json
import os
import sys
from pathlib import Path

from playwright.sync_api import sync_playwright

BASE = f"http://127.0.0.1:{os.environ.get('APP_PORT', '8000')}/"
OUT = Path(__file__).resolve().parent.parent / ".playwright-out"
OUT.mkdir(exist_ok=True)
PLACEHOLDER = "Ask about the graph"


def main() -> int:
    console: list[str] = []
    report: dict[str, object] = {"base": BASE}
    failures: list[str] = []

    with sync_playwright() as p:
        browser = p.chromium.launch(headless=True)
        page = browser.new_page(viewport={"width": 1400, "height": 900})
        page.on("console", lambda m: console.append(f"{m.type}: {m.text}"))
        page.on("pageerror", lambda e: console.append(f"pageerror: {e}"))
        page.add_init_script("window.__PLAYWRIGHT_TEST = true;")

        page.goto(BASE, wait_until="domcontentloaded")
        page.wait_for_selector("#lc-canvas", timeout=30_000)
        box = page.get_by_placeholder(PLACEHOLDER)
        box.wait_for(timeout=15_000)

        # ── C1 build health: fixture renders into the freshly-built component ──
        page.get_by_role("button", name="Load graph").click()
        page.wait_for_function(
            "() => window.__cy && window.__cy.nodes().length > 0", timeout=20_000
        )
        node_count = page.evaluate("() => window.__cy.nodes().length")
        report["fixture_node_count"] = node_count
        # The spotlight's node-derivation logic is unit-tested (renderer.test.ts) and the
        # .flash rule it reuses is asserted in cytoscapeStyle there; here we confirm the
        # freshly-built component renders and the patch path stays console-clean.

        # ── C2 up-arrow recall ──
        box.click()
        page.keyboard.press("Control+A")
        page.keyboard.type("alpha question")
        page.keyboard.press("Enter")  # JS records "alpha question"
        page.wait_for_timeout(300)
        box.click()
        page.keyboard.press("Control+A")
        page.keyboard.type("beta question")
        page.keyboard.press("Enter")  # JS records "beta question"
        page.wait_for_timeout(300)
        # Clear the composer, then recall.
        box.click()
        page.keyboard.press("Control+A")
        page.keyboard.press("Delete")
        report["after_clear"] = box.input_value()
        page.keyboard.press("ArrowUp")  # → most recent: "beta question"
        page.wait_for_timeout(120)
        recall1 = box.input_value()
        report["recall_1"] = recall1
        page.keyboard.press("ArrowUp")  # → "alpha question"
        page.wait_for_timeout(120)
        recall2 = box.input_value()
        report["recall_2"] = recall2
        page.keyboard.press("ArrowDown")  # → back to "beta question"
        page.wait_for_timeout(120)
        down1 = box.input_value()
        report["arrowdown_1"] = down1
        page.screenshot(path=str(OUT / "c2_recall.png"))

        if recall1 != "beta question":
            failures.append(
                f"C2: first ArrowUp expected 'beta question', got {recall1!r}"
            )
        if recall2 != "alpha question":
            failures.append(
                f"C2: second ArrowUp expected 'alpha question', got {recall2!r}"
            )
        if down1 != "beta question":
            failures.append(f"C2: ArrowDown expected 'beta question', got {down1!r}")

        browser.close()

    errors = [c for c in console if c.startswith(("error:", "pageerror:"))]
    report["console_errors"] = errors
    if errors:
        failures.append(f"{len(errors)} console/page error(s): {errors[:3]}")
    report["failures"] = failures
    report["ok"] = not failures
    (OUT / "c1c2_report.json").write_text(
        json.dumps(report, indent=2), encoding="utf-8"
    )
    print(json.dumps(report, indent=2))
    return 0 if not failures else 1


if __name__ == "__main__":
    sys.exit(main())