import http.client
import shutil
import threading
from pathlib import Path
from urllib.parse import urlencode

import pytest
import yaml

from rtut import project as J, run as R, run2, ui

ROOT = Path(__file__).resolve().parent.parent


def write(path: Path, data):
    path.parent.mkdir(parents=True, exist_ok=True)
    path.write_text(yaml.safe_dump(data, sort_keys=False))


@pytest.fixture
def psrv(tmp_path):
    repo = tmp_path
    shutil.copy(ROOT / "runbooks/showcase-lighthouse/pack.yaml", repo / "runbooks/show/pack.yaml") if (repo / "runbooks/show").mkdir(parents=True) is None else None
    hello = yaml.safe_load((ROOT / "runbooks/example-hello/pack.yaml").read_text())
    hello["parameters"] = [{"id": "host", "label": "Host to ping", "type": "string", "pattern": "[a-zA-Z0-9.-]+"},
                           {"id": "count", "label": "Ping count", "type": "int", "default": 1}]
    write(repo / "runbooks/hello/pack.yaml", hello)
    v2 = yaml.safe_load((ROOT / "runbooks/showcase-lighthouse/pack.v0.2.yaml").read_text())
    v2["id"] = "rtut.showcase-lighthouse-v2"
    write(repo / "runbooks/lh2/pack.yaml", v2)
    for f in (ROOT / "attribute-sets").glob("*.yaml"):
        write(repo / "attribute-sets" / f.name, yaml.safe_load(f.read_text()))
    tpl = yaml.safe_load((ROOT / "project-templates/lighthouse-watch.yaml").read_text())
    tpl["runbooks"].append({"pack": "rtut.showcase-lighthouse-v2", "after": ["rtut.example-hello"]})
    write(repo / "project-templates/lighthouse-watch.yaml", tpl)
    s = ui.serve([repo], 0)
    threading.Thread(target=s.serve_forever, daemon=True).start()
    s.repo = repo
    yield s
    s.shutdown()


def req(s, method, path, form=None, host="127.0.0.1"):
    c = http.client.HTTPConnection("127.0.0.1", s.server_address[1])
    body = urlencode(form) if form is not None else None
    c.request(method, path, body, {"Host": host, "Content-Type": "application/x-www-form-urlencoded"})
    r = c.getresponse()
    return r.status, r.getheader("Location"), r.read().decode()


def make_project(s, pid="harbour", host=None):
    t = s.app.token
    form = {"_t": t, "project_id": pid, "environment": "rehearsal", "a_keeper": "Ada", "a_logdir": f"/tmp/rtut-ui-{pid}"}
    if host:
        form["a_host"] = host
    return req(s, "POST", "/template/lighthouse-watch/new", form)


def test_index_has_projects_templates_runbooks_and_maturity(psrv):
    _, _, body = req(psrv, "GET", "/")
    assert "<h1>Projects</h1>" in body and "Project templates" in body and "<h2>Runbooks</h2>" in body
    assert "/template/lighthouse-watch" in body
    assert ">draft<" in body                                    # maturity pill on every native runbook


def test_template_page_shows_attributes_with_requirement_and_notes(psrv):
    st, _, body = req(psrv, "GET", "/template/lighthouse-watch")
    assert st == 200 and "A watch at a lighthouse" in body
    assert "name='a_keeper'" in body and "Who keeps this light" in body and ">required<" in body
    assert "name='a_weather'" not in body                       # weather is set per target, so it is not a template question
    assert "Create project" in body and "<option>rehearsal</option>" in body and "<option>production</option>" in body
    assert req(psrv, "GET", "/template/nope")[0] == 404


def test_create_project_from_template_and_view_it(psrv):
    st, loc, _ = make_project(psrv)
    assert st == 303 and loc == "/project/harbour"
    made = yaml.safe_load((psrv.repo / "projects/harbour/project.yaml").read_text())
    assert made["template"] == "lighthouse-watch" and made["environment"] == "rehearsal" and made["attributes"]["keeper"] == "Ada"
    _, _, body = req(psrv, "GET", "/project/harbour")
    assert "A watch at a lighthouse" in body and "from template lighthouse-watch" in body
    assert ">planned<" in body and ">rehearsal<" in body
    assert "The night watch is played through" in body                # the goal
    assert "target:north-light" in body                                # provenance of the fog weather
    assert "Still needed" in body and "name='a_host'" in body         # hello needs a host
    assert "cannot be run in this UI yet" in body                     # the v0.2 member


def test_needed_attributes_can_be_filled_in_and_are_validated(psrv):
    make_project(psrv)
    t = psrv.app.token
    st, _, body = req(psrv, "POST", "/project/harbour/attributes", {"_t": t, "a_host": "bad host;rm"})
    assert st == 400 and "host" in body and "Still needed" in body
    assert req(psrv, "POST", "/project/harbour/attributes", {"_t": t, "a_host": "hvs.ABCDEFGHIJKLMN"})[0] == 400
    assert req(psrv, "POST", "/project/harbour/attributes", {"_t": t, "a_host": "example.org"})[0] == 303
    _, _, body = req(psrv, "GET", "/project/harbour")
    assert "Still needed" not in body and "example.org" in body


def test_start_a_run_from_a_project_uses_its_attributes_and_links_back(psrv):
    make_project(psrv, host="example.org")
    t = psrv.app.token
    _, _, body = req(psrv, "GET", "/project/harbour")
    assert "waiting for rtut.showcase-lighthouse" in body             # hello waits for the showcase
    assert body.count("Start run") == 1                                # only the member that may start
    st, loc, _ = req(psrv, "POST", "/project/harbour/run", {"_t": t, "pack": "rtut.showcase-lighthouse", "target": "north-light", "operator": "bernd"})
    assert st == 303 and loc.startswith("/run/") and loc.endswith("#current")
    _, _, run_page = req(psrv, "GET", loc.split("#")[0])
    assert "project <a href='/project/harbour'>harbour</a> @north-light · rehearsal" in run_page
    _, _, body = req(psrv, "GET", "/project/harbour")
    assert ">applying<" in body and "latest run" in body
    st, loc2, _ = req(psrv, "POST", "/project/harbour/run", {"_t": t, "pack": "rtut.showcase-lighthouse-v2", "operator": "bernd"})
    assert st == 303                                                    # the engine accepts it; the UI just cannot walk v0.2 runs yet
    assert "cannot walk v0.2 runs yet" in req(psrv, "GET", loc2.split("#")[0])[2]


def test_attribute_table_shows_state_source_modified_and_problems(psrv):
    make_project(psrv)
    reg_file = psrv.repo / "projects/harbour/project.yaml"
    d = yaml.safe_load(reg_file.read_text()); d["attributes"]["logdir"] = "/etc"
    reg_file.write_text(yaml.safe_dump(d, sort_keys=False))
    _, _, body = req(psrv, "GET", "/project/harbour")
    assert "<th>Source</th>" in body and "set:harbour-defaults" in body
    assert ">err<" in body and "/etc" in body                          # invalid value is shown as err, not hidden
    assert ">nil<" in body                                             # hello's host has no value yet


def test_review_form_records_a_review_and_raises_maturity(psrv):
    t = psrv.app.token
    i = psrv.app.pack_index("rtut.showcase-lighthouse")
    _, _, body = req(psrv, "GET", f"/pack/{i}")
    assert "Maturity" in body and "Reviewed: <b>no</b>" in body and "Record my review" in body
    st, loc, _ = req(psrv, "POST", f"/pack/{i}/review", {"_t": t, "by": "alice", "note": "read it"})
    assert st == 303 and loc.endswith("#maturity")
    _, _, body = req(psrv, "GET", f"/pack/{i}")
    assert "Reviewed: <b>yes</b>" in body and "alice" in body and "current revision" in body and ">reviewed<" in body
    st, _, body = req(psrv, "POST", f"/pack/{i}/review", {"_t": t, "by": "two words"})
    assert st == 400 and "one word" in body


def test_idempotency_shown_per_spec_version(psrv):
    i = psrv.app.pack_index("rtut.showcase-lighthouse")
    _, _, body = req(psrv, "GET", f"/pack/{i}")
    assert "Idempotency: <b>not declared (v0.1 packs cannot declare it)</b>" in body


def test_csrf_host_and_escaping(psrv):
    assert req(psrv, "POST", "/template/lighthouse-watch/new", {"project_id": "x", "environment": "rehearsal"})[0] == 403
    assert req(psrv, "POST", "/project/harbour/run", {"pack": "x"})[0] == 403
    assert req(psrv, "GET", "/project/harbour", host="evil.example")[0] == 403
    tpl = psrv.repo / "project-templates/lighthouse-watch.yaml"
    d = yaml.safe_load(tpl.read_text()); d["title"] = "<script>alert(1)</script> watch"
    tpl.write_text(yaml.safe_dump(d, sort_keys=False))
    _, _, body = req(psrv, "GET", "/")
    assert "<script>alert(1)" not in body and "&lt;script&gt;alert(1)" in body
    _, _, body = req(psrv, "GET", "/template/lighthouse-watch")
    assert "<script>alert(1)" not in body


def test_bad_project_id_and_duplicate_are_refused(psrv):
    t = psrv.app.token
    st, _, body = req(psrv, "POST", "/template/lighthouse-watch/new", {"_t": t, "project_id": "Bad Id!", "environment": "rehearsal"})
    assert st == 400 and "project id" in body
    assert make_project(psrv)[0] == 303
    st, _, body = req(psrv, "POST", "/template/lighthouse-watch/new", {"_t": t, "project_id": "harbour", "environment": "rehearsal"})
    assert st == 400 and "already exists" in body
    st, _, body = req(psrv, "POST", "/template/lighthouse-watch/new", {"_t": t, "project_id": "other", "environment": "prod"})
    assert st == 400 and "environment" in body


def test_v02_run_shows_a_guard_instead_of_crashing(psrv):
    reg = psrv.app.registry()
    pack = reg.packs["rtut.showcase-lighthouse-v2"]
    r = run2.create(pack, "bernd", {"logdir": "/tmp/rtut-ui-v2"})
    i = psrv.app.pack_index("rtut.showcase-lighthouse-v2")
    st, _, body = req(psrv, "GET", f"/run/{i}/{r.data['run_id']}")
    assert st == 200 and "cannot walk v0.2 runs yet" in body