import json
import subprocess
from html.parser import HTMLParser
from pathlib import Path
from urllib.parse import urljoin


FRONTEND = Path(__file__).parents[1] / "frontend"
COMMANDS = FRONTEND / "commands.js"


class ScriptSourceParser(HTMLParser):
    def __init__(self):
        super().__init__()
        self.sources = []

    def handle_starttag(self, tag, attrs):
        if tag == "script":
            source = dict(attrs).get("src")
            if source:
                self.sources.append(source)


def test_filtered_command_runs_the_matching_action():
    script = f"""
const filterCommands = require({json.dumps(str(COMMANDS))});
let action = '';
const commands = [
  {{ name: 'Open whiteboard', run: () => {{ action = 'whiteboard'; }} }},
  {{ name: 'Refresh now', run: () => {{ action = 'refresh'; }} }},
];
const matches = filterCommands(commands, 'refresh');
if (matches.length !== 1) throw new Error(`expected one match, got ${{matches.length}}`);
matches[0].run();
if (action !== 'refresh') throw new Error(`expected refresh, got ${{action}}`);
"""

    subprocess.run(["node", "-e", script], check=True, capture_output=True, text=True)


def test_command_script_resolves_inside_dashboard_subpath():
    parser = ScriptSourceParser()
    parser.feed((FRONTEND / "index.html").read_text())
    command_source = next(source for source in parser.sources if source.endswith("commands.js"))

    assert urljoin(
        "https://forge.alexanderwhitestone.com/dashboard/", command_source
    ) == "https://forge.alexanderwhitestone.com/dashboard/static/commands.js"


def test_remote_command_search_ignores_stale_responses():
    script = f"""
const filterCommands = require({json.dumps(str(COMMANDS))});
(async () => {{
const pending = new Map();
const states = [];
const controller = filterCommands.createGlobalSearchController({{
  delay: 0,
  search: query => new Promise(resolve => pending.set(query, resolve)),
  onState: state => states.push(state),
}});
controller.setQuery('mobile');
await new Promise(resolve => setTimeout(resolve, 0));
controller.setQuery('release');
await new Promise(resolve => setTimeout(resolve, 0));
pending.get('release')([{{ title: 'Current result' }}]);
await new Promise(resolve => setTimeout(resolve, 0));
pending.get('mobile')([{{ title: 'Stale result' }}]);
await new Promise(resolve => setTimeout(resolve, 0));
const ready = states.filter(state => state.status === 'ready');
if (ready.length !== 1) throw new Error(`expected one ready state, got ${{ready.length}}`);
if (ready[0].query !== 'release' || ready[0].items[0].title !== 'Current result') {{
  throw new Error(`stale response replaced current state: ${{JSON.stringify(ready)}}`);
}}
}})().catch(error => {{ console.error(error); process.exit(1); }});
"""

    subprocess.run(
        ["node", "-e", script],
        check=True, capture_output=True, text=True,
    )


def test_command_selection_wraps_for_arrow_keys():
    script = f"""
const commands = require({json.dumps(str(COMMANDS))});
if (commands.nextSelection(-1, 'ArrowDown', 3) !== 0) throw new Error('should select first');
if (commands.nextSelection(2, 'ArrowDown', 3) !== 0) throw new Error('should wrap down');
if (commands.nextSelection(0, 'ArrowUp', 3) !== 2) throw new Error('should wrap up');
if (commands.nextSelection(1, 'Enter', 3) !== 1) throw new Error('other keys should not move');
"""

    subprocess.run(["node", "-e", script], check=True, capture_output=True, text=True)


def test_palette_exposes_accessible_global_work_search_under_dashboard_subpath():
    html = (FRONTEND / "index.html").read_text()

    assert 'role="combobox"' in html
    assert 'aria-controls="cmd-results"' in html
    assert 'role="listbox"' in html
    assert "fetch('api/v1/search?q='" in html
    assert urljoin(
        "https://forge.alexanderwhitestone.com/dashboard/",
        "api/v1/search?q=mobile",
    ) == "https://forge.alexanderwhitestone.com/dashboard/api/v1/search?q=mobile"