"""Regression test for #3429 — getModelLabel() mangles URI-scheme model IDs.

PR #3366 (fix for #3360) changed getModelLabel() to strip only the first
``/``-segment instead of ``split('/').pop()``. That fixed multi-slash proxy IDs
but regressed URI-scheme IDs (e.g. Yandex ``gpt://${FOLDER}/deepseek-v4-flash/latest``)
because ``indexOf('/')`` lands inside the ``://`` and leaves ``/${FOLDER}/...``
path junk in the composer model chip.

The fix detects a ``scheme://`` id and takes the last meaningful path segment
(skipping ``${...}`` env-var placeholders and bare version tails like ``latest``),
while NOT touching the #3360 multi-slash behavior for non-URI ids.

Runs the live getModelLabel() via Node so drift between the test and the real
code is caught immediately.
"""
import shutil
import subprocess
from pathlib import Path

import pytest

REPO_ROOT = Path(__file__).parent.parent.resolve()
UI_JS_PATH = REPO_ROOT / "static" / "ui.js"
NODE = shutil.which("node")

pytestmark = pytest.mark.skipif(NODE is None, reason="node not on PATH")

_DRIVER = r"""
const fs = require('fs');
const ui = fs.readFileSync(process.argv[1], 'utf8');
// Slice getModelLabel() by function boundaries (regex literals inside it defeat
// a naive brace counter, so bound it by the next top-level function instead).
const start = ui.indexOf('function getModelLabel(');
if (start < 0) throw new Error('getModelLabel not found');
const after = ui.indexOf('\nfunction _gatewayProviderName(', start);
if (after < 0) throw new Error('getModelLabel end boundary not found');
const fnSrc = ui.slice(start, after);
const _dynamicModelLabels = {};
function _fmtOllamaLabel(s){ return s; }
// getModelLabel() calls the dotted Bedrock/Vertex prefix normalizer, which lives
// just above it with two Sets it closes over. Pull all three in, or the eval'd
// function ReferenceErrors on the first dotted id.
const _stripStart = ui.indexOf('const _BEDROCK_REGION_PREFIXES');
const _stripEnd = ui.indexOf('function getModelLabel(');
if (_stripStart < 0 || _stripStart > _stripEnd) throw new Error('_stripDottedModelPrefix block not found');
eval(ui.slice(_stripStart, _stripEnd));
eval(fnSrc);
const out = {};
for (const m of JSON.parse(process.argv[2])) out[m] = getModelLabel(m);
process.stdout.write(JSON.stringify(out));
"""


def _labels(model_ids):
    import json
    proc = subprocess.run(
        [NODE, "-e", _DRIVER, str(UI_JS_PATH), json.dumps(model_ids)],
        capture_output=True, text=True, timeout=30,
    )
    assert proc.returncode == 0, f"node driver failed: {proc.stderr}"
    return json.loads(proc.stdout)


def test_uri_scheme_model_id_label_is_model_name_not_path_junk():
    """#3429: a gpt://.../model/latest id must label as the model name."""
    out = _labels([
        "gpt://${YANDEX_FOLDER_ID}/deepseek-v4-flash/latest",
        "gpt://folder123/deepseek-v4-flash/latest",
        "openrouter://acct/qwen-3-coder",
        "gpt://${F}/qwen-3-coder",
    ])
    assert out["gpt://${YANDEX_FOLDER_ID}/deepseek-v4-flash/latest"] == "deepseek-v4-flash"
    assert out["gpt://folder123/deepseek-v4-flash/latest"] == "deepseek-v4-flash"
    assert out["openrouter://acct/qwen-3-coder"] == "qwen-3-coder"
    assert out["gpt://${F}/qwen-3-coder"] == "qwen-3-coder"
    # The env-var placeholder must never leak into the label.
    for label in out.values():
        assert "${" not in label, f"env-var placeholder leaked into label: {label!r}"


def test_uri_label_edge_cases_never_return_authority_or_drop_digit_models():
    """#3429 follow-up (Codex gate): a single path segment is kept even when it
    looks version-like, a digit-leading model name (2026-model) is NOT mistaken
    for a version tail, and the authority/folder is never returned as the label."""
    out = _labels([
        "gpt://folder123/v4",            # single path seg — keep it, don't fall back to authority
        "gpt://folder123/latest",        # single path seg — keep it
        "gpt://folder123/2026-model/latest",  # digit-leading real model name
    ])
    assert out["gpt://folder123/v4"] == "v4"
    assert out["gpt://folder123/latest"] == "latest"
    assert out["gpt://folder123/2026-model/latest"] == "2026-model"
    # The authority/folder must never be promoted to the label.
    for label in out.values():
        assert label != "folder123", "authority/folder leaked into label"


def test_uri_degenerate_ids_fall_back_to_raw_not_authority_or_placeholder():
    """#3429 follow-up 2 (Codex gate): a URI with no usable model segment must
    fall back to the raw id — never the authority/folder, never a ${...} env-var."""
    out = _labels([
        "gpt://folder123",              # authority only, no path
        "gpt://folder123/${MODEL}",     # path is only an env-var placeholder
    ])
    assert out["gpt://folder123"] == "gpt://folder123"
    assert out["gpt://folder123/${MODEL}"] == "gpt://folder123/${MODEL}"
    for label in out.values():
        assert label != "folder123", "authority leaked into label"
        assert label not in ("${MODEL}",), "env-var placeholder leaked into label"


def test_uri_fix_does_not_regress_multi_slash_or_bare_ids():
    """#3360 multi-slash hierarchy + single-slash/bare ids stay correct."""
    out = _labels([
        "vendor_a/deepseek/deepseek-v4-pro",  # #3360: keep vendor hierarchy
        "claude-sonnet-4-6",                  # bare id unchanged
    ])
    # Non-URI multi-slash id keeps everything after the first segment (#3360).
    assert out["vendor_a/deepseek/deepseek-v4-pro"] == "deepseek/deepseek-v4-pro"
    assert out["claude-sonnet-4-6"] == "claude-sonnet-4-6"