"""Render-smoke, XSS-probe, byte-identity, and autoescape tests for the
Host Agent console Jinja2 templates (Tasks 6.3-6.7)."""

from __future__ import annotations

from pathlib import Path
from typing import Any

import pytest

from host_agent.config import HostAgentConfig
from host_agent.web.auth import SessionState

from .conftest import (
    XSS_PROBE,
    _ESCAPED_PROBE,
    make_account_context,
    make_dashboard_context,
    make_devices_context,
    make_history_context,
    make_login_context,
    make_task_detail_context,
    make_tasks_list_context,
)

# ---------------------------------------------------------------------------
# 6.3  Render-smoke tests (one per template)
# ---------------------------------------------------------------------------


def test_login_renders(env) -> None:
    html = env.get_template("login.html").render(
        **make_login_context(account={"username": "operator"})
    )
    assert '<form method="post" action="/login">' in html


def test_dashboard_renders(env, sample_session) -> None:
    html = env.get_template("dashboard.html").render(
        **make_dashboard_context(sample_session)
    )
    assert 'id="last-heartbeat"' in html


def test_devices_renders(env, sample_session) -> None:
    html = env.get_template("devices.html").render(
        **make_devices_context(sample_session)
    )
    assert '<form method="post" action="/devices/save">' in html


def test_account_renders(env, sample_session) -> None:
    html = env.get_template("account.html").render(
        **make_account_context(sample_session)
    )
    assert '<form method="post" action="/account">' in html


def test_history_renders(env, sample_session) -> None:
    html = env.get_template("history.html").render(
        **make_history_context(sample_session)
    )
    assert "<table>" in html


def test_tasks_list_renders(env, sample_session) -> None:
    html = env.get_template("tasks_list.html").render(
        **make_tasks_list_context(sample_session)
    )
    assert "<h1>Tasks</h1>" in html


def test_task_detail_renders(env, sample_session) -> None:
    html = env.get_template("task_detail.html").render(
        **make_task_detail_context(sample_session)
    )
    assert "<h2>Timeline</h2>" in html


def test_task_detail_shows_cancel_button_for_non_terminal_task(
    env, sample_session
) -> None:
    html = env.get_template("task_detail.html").render(
        **make_task_detail_context(sample_session, can_cancel=True)
    )
    assert 'action="/tasks/task-001/cancel"' in html
    assert "Cancel task" in html


def test_task_detail_hides_cancel_button_for_terminal_task(
    env, sample_session
) -> None:
    html = env.get_template("task_detail.html").render(
        **make_task_detail_context(sample_session, can_cancel=False)
    )
    assert 'action="/tasks/task-001/cancel"' not in html


def test_task_detail_renders_cancel_notice_and_error(env, sample_session) -> None:
    html = env.get_template("task_detail.html").render(
        **make_task_detail_context(
            sample_session,
            cancel_notice="Cancellation requested. It may take a moment to take effect.",
        )
    )
    assert 'id="cancel-notice"' in html

    html = env.get_template("task_detail.html").render(
        **make_task_detail_context(
            sample_session,
            cancel_error="Failed to request cancellation. Try again.",
        )
    )
    assert 'id="cancel-error"' in html


# ---------------------------------------------------------------------------
# 6.4  XSS-probe tests (parametrised over templates with operator-influenced
#      string fields set to <script>alert(1)</script>)
# ---------------------------------------------------------------------------

_TEMPLATES_WITH_XSS = ["dashboard", "devices", "history", "tasks_list", "task_detail"]


def _xss_context(template: str, session: SessionState) -> dict[str, Any]:
    """Build a context where every operator-influenced string field is the
    XSS probe string."""
    if template == "dashboard":
        return make_dashboard_context(
            session,
            devices=[
                {
                    "id": XSS_PROBE,
                    "name": XSS_PROBE,
                    "driver_type": XSS_PROBE,
                    "display_status": XSS_PROBE,
                }
            ],
            heartbeat_text=XSS_PROBE,
            assignment_text=XSS_PROBE,
            progress_text=XSS_PROBE,
            policy_text=XSS_PROBE,
        )
    if template == "devices":
        return make_devices_context(
            session,
            devices=[
                {
                    "device_id": XSS_PROBE,
                    "name": XSS_PROBE,
                    "driver_type": XSS_PROBE,
                    "cloud_device_id": XSS_PROBE,
                    "connection_info": {},
                }
            ],
            edit_record={
                "device_id": XSS_PROBE,
                "name": XSS_PROBE,
                "driver_type": XSS_PROBE,
                "connection_info": {},
            },
            connection_info_json=XSS_PROBE,
            error=XSS_PROBE,
        )
    if template == "history":
        return make_history_context(
            session,
            entries=[
                {
                    "occurred_at": XSS_PROBE,
                    "kind": XSS_PROBE,
                    "summary": XSS_PROBE,
                }
            ],
        )
    if template == "tasks_list":
        return make_tasks_list_context(
            session,
            tasks=[
                {
                    "id": XSS_PROBE,
                    "status": XSS_PROBE,
                    "device_id": XSS_PROBE,
                    "created_at": XSS_PROBE,
                    "updated_at": XSS_PROBE,
                }
            ],
        )
    if template == "task_detail":
        return make_task_detail_context(
            session,
            task={
                "id": XSS_PROBE,
                "goal": XSS_PROBE,
                "device_id": XSS_PROBE,
                "status": XSS_PROBE,
                "created_at": XSS_PROBE,
                "updated_at": XSS_PROBE,
            },
            task_rows=[
                ("id", XSS_PROBE),
                ("goal", XSS_PROBE),
                ("status", XSS_PROBE),
            ],
            timeline_steps=[
                {
                    "index": 0,
                    "timestamp": XSS_PROBE,
                    "prompt": XSS_PROBE,
                    "tool_call": {"action": XSS_PROBE, "description": XSS_PROBE},
                    "result": {"ok": XSS_PROBE},
                    "before_screenshot_src": None,
                    "after_screenshot_src": None,
                    "ocr_results": [],
                    "ui_tree_nodes": [],
                }
            ],
        )
    raise ValueError(f"unknown template {template}")


@pytest.mark.parametrize("template", _TEMPLATES_WITH_XSS)
def test_xss_probe_is_escaped(env, sample_session, template: str) -> None:
    html = env.get_template(f"{template}.html").render(
        **_xss_context(template, sample_session)
    )
    assert _ESCAPED_PROBE in html, f"escaped probe missing from {template}"
    assert XSS_PROBE not in html, f"raw <script> leaked in {template}"


# ---------------------------------------------------------------------------
# 6.5  Byte-identity test for dashboard inline <script>
# ---------------------------------------------------------------------------


def test_dashboard_script_byte_identity(env, sample_session) -> None:
    config = HostAgentConfig(control_plane_url="http://localhost:8080")
    html = env.get_template("dashboard.html").render(
        title="Status",
        session=sample_session,
        identity=None,
        devices=[],
        config=config,
        heartbeat_text="never",
        assignment_text="none",
        progress_text="",
        policy_text="no Cloud policy cached",
    )
    start = html.index("<script>")
    end = html.index("</script>", start) + len("</script>")
    script_block = html[start:end]
    baseline = (
        (Path(__file__).parent / "__baseline__" / "dashboard_script.txt")
        .read_text(encoding="utf-8")
        .rstrip()
    )
    assert script_block.rstrip() == baseline


# ---------------------------------------------------------------------------
# 6.6  No-autoescape-bypass test
# ---------------------------------------------------------------------------


def test_no_autoescape_bypass_in_templates() -> None:
    templates_dir = (
        Path(__file__).resolve().parents[3] / "host_agent" / "web" / "templates"
    )
    forbidden = ["| safe", "{% autoescape false %}", "{% endautoescape %}"]
    for tpl_path in templates_dir.glob("*.html"):
        content = tpl_path.read_text(encoding="utf-8")
        for pattern in forbidden:
            assert pattern not in content, f"{pattern} found in {tpl_path.name}"


# ---------------------------------------------------------------------------
# 6.7  _ENV autoescape configuration test
# ---------------------------------------------------------------------------


def test_env_autoescape_enabled_for_html(env) -> None:
    """The Environment's autoescape policy must escape content rendered
    through .html templates."""
    # Verify the autoescape policy is active (truthy or callable).
    assert env.autoescape is True or callable(env.autoescape)

    # Render the XSS probe through a .html template that interpolates it
    # (login.html interpolates {{ error }}) and confirm it is escaped.
    result = env.get_template("login.html").render(
        title="Login",
        session=None,
        account={"username": "operator"},
        error="<script>alert(1)</script>",
    )
    assert "&lt;script&gt;alert(1)&lt;/script&gt;" in result
    assert "<script>alert(1)</script>" not in result