"""Tool-using playbook loop — the read-only MVP.

Run from nexus-core/ with the Promethean venv active:  pytest -q

Hermetic: a fake manager stands in for Ollama, so no network/model is needed.
Guards the two pieces that would silently break the feature: the allowlist
filter and the tool-call loop's terminate-on-content behaviour.
"""
import asyncio
import json

from synapse import tools
from synapse.chat import _run_tool_loop


def test_schemas_for_drops_unknown_names():
    schemas = tools.schemas_for(["search_memory", "not_a_tool"])
    names = [s["function"]["name"] for s in schemas]
    assert names == ["search_memory"]
    assert tools.schemas_for([]) == []


async def _drain(gen):
    return [s async for s in gen]


def test_remember_writes_a_memory_fact(tmp_path, monkeypatch):
    # The `remember` action tool persists a fact through the store.
    import synapse.memory.store as store_mod
    from synapse.memory.store import PersistentMemoryStore
    fresh = PersistentMemoryStore(tmp_path / "m.db")
    monkeypatch.setattr(tools, "store", fresh)
    out = asyncio.run(tools.dispatch("remember", {"text": "user likes tea", "section": "Prefs"}))
    assert "user likes tea" in out
    assert any(it.text == "user likes tea" for it in fresh.all())


def test_action_tools_registered():
    for name in ("web_search", "fetch_url", "remember"):
        assert name in tools.REGISTRY
    names = [s["function"]["name"] for s in tools.schemas_for(["web_search", "remember", "nope"])]
    assert names == ["web_search", "remember"]


class _ActionManager:
    """Returns a `remember` (action) tool_call once, then plain content."""
    def __init__(self):
        self.n = 0

    async def chat(self, **_):
        self.n += 1
        if self.n == 1:
            return {"role": "assistant",
                    "tool_calls": [{"function": {"name": "remember", "arguments": {"text": "x"}}}]}
        return {"role": "assistant", "content": "done"}


def _drive_with_decision(decision, monkeypatch):
    from synapse import chat as chatmod

    async def fake_dispatch(name, args):
        return "saved-ok"
    monkeypatch.setattr(tools, "dispatch", fake_dispatch)

    async def run():
        messages = [{"role": "user", "content": "remember x"}]
        schemas = tools.schemas_for(["remember"])
        gen = chatmod._run_tool_loop(_ActionManager(), messages, "m", schemas, None, None,
                                     conversation_id="conv", policy="ask")
        statuses = []
        async for s in gen:
            statuses.append(s)
            if s.startswith("__approve__"):
                w = chatmod.pending_approvals["conv"]
                w["decisions"] = {"remember": decision}
                w["event"].set()
        return statuses, messages

    return asyncio.run(run())


def test_ask_policy_pauses_then_runs_on_approve(monkeypatch):
    statuses, messages = _drive_with_decision(True, monkeypatch)
    assert any(s.startswith("__approve__") for s in statuses)   # paused for approval
    assert "__status__remember" in statuses                     # approved -> ran
    assert any(m["role"] == "tool" and "saved-ok" in m["content"] for m in messages)


def test_ask_policy_skips_on_deny(monkeypatch):
    statuses, messages = _drive_with_decision(False, monkeypatch)
    assert any(s.startswith("__approve__") for s in statuses)
    assert "__status__remember" not in statuses                 # denied -> never ran
    assert any(m["role"] == "tool" and "declined" in m["content"] for m in messages)


class _ContentJsonActionManager:
    """Small-model shape: dumps the action call into `content`, no native
    `tool_calls` field — the lower-confidence path the "allow" bypass must
    not trust."""
    def __init__(self):
        self.n = 0

    async def chat(self, **_):
        self.n += 1
        if self.n == 1:
            return {"role": "assistant",
                    "content": json.dumps({"name": "remember", "arguments": {"text": "x"}})}
        return {"role": "assistant", "content": "done"}


def test_content_json_action_call_asks_even_under_allow_policy(monkeypatch):
    """A call recovered by guessing at `content` is weaker evidence than the
    API's own structured tool_calls field — a model can land on JSON shaped
    like a call while only meaning to describe one. It must still go through
    approval even when action_tool_policy is "allow", the default that lets a
    *native* tool_calls field run unattended."""
    from synapse import chat as chatmod

    async def fake_dispatch(name, args):
        return "saved-ok"
    monkeypatch.setattr(tools, "dispatch", fake_dispatch)

    async def run():
        messages = [{"role": "user", "content": "remember x"}]
        schemas = tools.schemas_for(["remember"])
        gen = chatmod._run_tool_loop(_ContentJsonActionManager(), messages, "m", schemas, None, None,
                                     conversation_id="conv", policy="allow")
        statuses = []
        async for s in gen:
            statuses.append(s)
            if s.startswith("__approve__"):
                w = chatmod.pending_approvals["conv"]
                w["decisions"] = {"remember": True}
                w["event"].set()
        return statuses

    statuses = asyncio.run(run())
    assert any(s.startswith("__approve__") for s in statuses)
    assert "__status__remember" in statuses


def test_action_tools_gated_by_consent():
    allow = ["search_memory", "web_search", "remember", "fetch_url"]
    on = [s["function"]["name"] for s in tools.schemas_for(allow, allow_actions=True)]
    off = [s["function"]["name"] for s in tools.schemas_for(allow, allow_actions=False)]
    assert set(on) == set(allow)          # all pass when actions allowed
    assert off == ["search_memory"]       # action tools withheld when not
    assert tools.is_action("remember") and not tools.is_action("search_memory")


class _FakeManager:
    """Returns a tool_call on the first chat() call, plain content after."""
    def __init__(self):
        self.calls = 0

    async def chat(self, **_):
        self.calls += 1
        if self.calls == 1:
            return {
                "role": "assistant",
                "tool_calls": [
                    {"function": {"name": "search_memory", "arguments": {"query": "gpu"}}}
                ],
            }
        return {"role": "assistant", "content": "here is the answer"}


def test_tool_loop_runs_tool_then_stops(monkeypatch):
    async def fake_dispatch(name, args):
        assert name == "search_memory"
        assert args == {"query": "gpu"}
        return '[{"section": "GPU", "text": "Vega 20 4GB"}]'

    monkeypatch.setattr(tools, "dispatch", fake_dispatch)

    messages = [{"role": "user", "content": "what gpu do i have?"}]
    schemas = tools.schemas_for(["search_memory"])
    statuses = asyncio.run(_drain(
        _run_tool_loop(_FakeManager(), messages, "m", schemas, None, None)
    ))

    # heartbeat + one status sentinel per tool run
    assert statuses == ["__status__tools", "__status__search_memory"]
    # messages mutated in place: user -> assistant(tool_calls) -> tool(result);
    # the final content turn is NOT appended (the streaming turn regenerates it).
    assert [m["role"] for m in messages] == ["user", "assistant", "tool"]
    assert "Vega 20" in messages[-1]["content"]


def test_tool_loop_degrades_when_model_returns_no_dict():
    class _NoToolManager:
        async def chat(self, **_):
            return None  # model can't do tools / errored

    messages = [{"role": "user", "content": "hi"}]
    before = list(messages)
    statuses = asyncio.run(_drain(_run_tool_loop(_NoToolManager(), messages, "m", [{}], None, None)))
    assert statuses == ["__status__tools"]  # heartbeat only; no tool ran
    assert messages == before      # untouched -> falls back to a plain stream


def test_read_file_stays_inside_the_repo():
    """The repo-file tools are the fix for the model inventing paths like
    `nexus/nlp.py`; the deny-list is what keeps them from reading secrets."""
    import json

    def read(p):
        return asyncio.run(tools._read_file(p))

    assert "escapes" in read("../../etc/passwd")
    # a leading slash is treated as repo-relative, so it lands nowhere real
    assert "root:" not in read("/etc/passwd")
    assert "required" in read("")
    # private data and heavy trees are refused even though they're in-repo
    for denied in ("synapse/memory/memory.db", ".git/config", "Promethean/pyvenv.cfg"):
        assert "not readable" in read(denied), denied
    assert "does not exist" in read("nexus/nlp.py")
    assert "PROJECT_ROOT" in json.loads(read("synapse/nexus_config.py"))["content"]


def test_list_files_globs_the_repo_without_leaking_denied_paths():
    import json

    hits = json.loads(asyncio.run(tools._list_files("synapse/**/*")))
    assert "synapse/main.py" in hits
    assert not [h for h in hits if h.endswith(".db") or "__pycache__" in h], hits


def test_routed_reference_playbook_contributes_its_tools(tmp_path, monkeypatch):
    """A reference playbook routed into the prompt must bring its tools with it.
    Without this the model reads instructions like "you can read the codebase"
    while being advertised zero tools — and narrates tool calls it never made."""
    from synapse.main import _route_playbooks
    from synapse.playbooks.store import PlaybookFileStore, PlaybookItem

    # Own store, not data/playbooks: the live set is the operator's, and a
    # published clone ships different playbooks - this asserted on data that
    # travels with one machine.
    store = PlaybookFileStore(tmp_path)
    store.add_playbook(PlaybookItem(id="main", title="Main", goal="g",
                                    instructions="i", order=0))
    store.add_playbook(PlaybookItem(id="dev", title="NexusOS Developer", goal="g",
                                    instructions="You can read the codebase.", order=1,
                                    tags=["synapse", "backend"],
                                    tools=["read_file", "list_files"]))
    monkeypatch.setattr("synapse.playbook_manager.playbook_store", store)
    import synapse.playbook_manager as pm

    routed = _route_playbooks("why is the memory endpoint in synapse returning 500", pm.get_context_playbooks())
    names = {pb.title for pb in routed}
    assert "NexusOS Developer" in names, names

    granted = {t for pb in routed for t in (pb.tools or [])}
    assert {"read_file", "list_files"} <= granted, granted
    # none of them are action tools, so they survive the default policy (off)
    assert tools.schemas_for(sorted(granted), allow_actions=False)


def test_standing_schemas_include_render_preview():
    names = [s["function"]["name"] for s in tools.standing_schemas()]
    assert names == ["render_preview"]
    assert "render_preview" in tools.STANDING_TOOLS
    assert not tools.is_action("render_preview")
    assert tools.wants_render_preview("visualize Collatz with a chart")
    assert not tools.wants_render_preview("what's the weather vibe today")


def test_render_preview_packages_markup_without_grading_its_quality():
    markup = """<!DOCTYPE html><html><body>
<canvas id="c" width="40" height="40"></canvas>
<script>c.width = c.width;</script>
</body></html>"""
    out = json.loads(asyncio.run(tools.dispatch("render_preview", {
        "lang": "html", "title": "Demo", "markup": markup,
    })))
    assert out["ok"] is True
    assert markup in out["fence"]
    assert "issues" not in out
    assert "scaffold" not in out


def test_render_preview_accepts_canvas_that_plots():
    good = """<!DOCTYPE html><html><body>
<canvas id="c" width="480" height="240"></canvas>
<input id="n" type="number" value="27">
<button onclick="go()">Go</button>
<script>
const c = document.getElementById('c');
const ctx = c.getContext('2d');
function go() {
  let n = +document.getElementById('n').value, seq = [];
  while (n !== 1 && seq.length < 500) { seq.push(n); n = n % 2 === 0 ? n/2 : 3*n+1; }
  seq.push(1);
  const max = Math.max(...seq);
  ctx.clearRect(0,0,c.width,c.height);
  ctx.beginPath();
  seq.forEach((v,i) => {
    const x = i * (c.width / Math.max(1, seq.length-1));
    const y = c.height - (v / max) * (c.height - 8);
    if (i === 0) ctx.moveTo(x,y); else ctx.lineTo(x,y);
  });
  ctx.stroke();
}
go();
</script></body></html>"""
    out = json.loads(asyncio.run(tools.dispatch("render_preview", {
        "lang": "html", "markup": good, "purpose": "line plot of an iterative sequence",
    })))
    assert out["ok"] is True
    assert out["fence"].startswith("```html\n")
    assert "getContext" in out["fence"]
    assert out.get("repaired") is not True


def test_code_that_throws_is_left_to_the_previews_own_error_channel():
    """This markup is broken twice over: getContext() is assigned to `canvas`
    but drawn with `ctx`, and collatz() is called as coll(). Both used to be
    rejected here by regex. Both now reach the browser, which reports them
    precisely — verified against the real preview:

        "Uncaught ReferenceError: ctx is not defined  (line 4)"
        "Uncaught ReferenceError: coll is not defined  (line 5)"

    Static guessing at runtime failures only ever caught the spellings someone
    anticipated; the error channel catches every one of them and carries a line
    number."""
    broken_at_runtime = """<!DOCTYPE html><html><body>
<canvas id="c" width="480" height="280"></canvas>
<script>
const canvas = document.getElementById('c').getContext('2d');
function collatz(n) {
  const s = [];
  while (n !== 1 && s.length < 500) {
    s.push(n);
    n = n % 2 === 0 ? n / 2 : n * 3 + 1;
  }
  s.push(1);
  return s;
}
function plot() {
  const seq = coll(document.getElementById('n').value);
  const max = Math.max(...seq), w = canvas.width, h = canvas.height;
  ctx.clearRect(0, 0, w, h);
  ctx.beginPath();
  seq.forEach((v, i) => {
    const x = i * (w / Math.max(1, seq.length - 1));
    const y = h - (v / max) * h;
    if (i === 0) ctx.moveTo(x, y); else ctx.lineTo(x, y);
  });
  ctx.stroke();
}
</script></body></html>"""
    out = json.loads(asyncio.run(tools.dispatch("render_preview", {
        "lang": "html",
        "purpose": "interactive sequence plot",
        "markup": broken_at_runtime,
    })))
    assert out["ok"] is True, out.get("issues")


def test_no_sequence_render_seed_helper():
    assert not hasattr(tools, "sequence_render_seed")


_FRONTEND_REGISTRY = ("interface", "web", "src", "preview", "languages.js")


def _frontend_preview_langs() -> list[str]:
    """Top-level keys of PREVIEW_LANGS in the frontend's preview registry."""
    import re
    from pathlib import Path
    src = Path(__file__).resolve().parents[1].joinpath(*_FRONTEND_REGISTRY)
    text = src.read_text(encoding="utf-8")
    body = re.search(r"^export const PREVIEW_LANGS = \{\n(.*?)^\};", text, re.S | re.M)
    assert body, f"could not find a PREVIEW_LANGS object literal in {src}"
    return re.findall(r"^  (\w+):", body.group(1), re.M)


def test_preview_langs_match_the_frontend_registry():
    """The render window is two registries — synapse/tools.py validates a
    language, interface/web/src/Markdown.jsx renders it — and a language present
    in only one degrades silently: the model emits a fence the UI shows as a
    plain code block, or the UI offers a preview the tool refuses to produce.
    Nothing at runtime couples them, so this is what keeps them in step."""
    # Plain ASCII in the message: this is read off a Windows console, where
    # pytest's output encoding mangles non-ASCII into replacement characters.
    assert _frontend_preview_langs() == list(tools.PREVIEW_LANGS), (
        "PREVIEW_LANGS differs between synapse/tools.py and "
        "interface/web/src/Markdown.jsx - add the language to both."
    )


def test_preview_lang_enum_is_derived_not_repeated():
    schema, _ = tools.REGISTRY["render_preview"]
    enum = schema["function"]["parameters"]["properties"]["lang"]["enum"]
    assert enum == list(tools.PREVIEW_LANGS)


def test_render_preview_rejects_unknown_lang():
    out = json.loads(asyncio.run(tools.dispatch("render_preview", {
        "lang": "python", "markup": "print('hi')" * 5,
    })))
    assert out["ok"] is False
    assert "lang must be" in out["error"]


def test_render_preview_accepts_a_jsx_component():
    good = """export default function Counter() {
  const [n, setN] = useState(0);
  return (
    <div>
      <button onClick={() => setN(n + 1)}>count {n}</button>
    </div>
  );
}"""
    out = json.loads(asyncio.run(tools.dispatch("render_preview", {
        "lang": "jsx", "markup": good, "purpose": "interactive counter",
    })))
    assert out["ok"] is True, out.get("issues")
    assert out["fence"].startswith("```jsx\n")


def test_render_preview_does_not_grade_jsx_against_its_purpose():
    component = """export default function Form() {
  const [name, setName] = useState("");
  return <label>Name <input value={name} onInput={(e) => setName(e.target.value)} /></label>;
}"""
    out = json.loads(asyncio.run(tools.dispatch("render_preview", {
        "lang": "jsx", "markup": component, "purpose": "a chart of the results",
    })))
    assert out["ok"] is True
    assert "issues" not in out


def test_asking_for_a_preview_language_or_pointer_interaction_offers_the_tool():
    """Each of these is a real prompt from a transcript where the render window
    should have been reachable. The first one was not: no hint matched
    'mouse-over sensitive ... jsx', so the tool was never advertised and the
    model answered about Euler's formula instead."""
    for prompt in (
        "Create a mouse-over sensitive Euler fluid field as a jsx or tsx",
        "write me a small tsx component",
        "make the particles react to hover",
        "a real-time simulation I can drag",
    ):
        assert tools.wants_render_preview(prompt), prompt

    # Still narrow: ordinary chat must not pay for a tool turn.
    for prompt in (
        "what's the weather vibe today",
        "summarise this email thread",
        "write a concise paragraph about caching",
    ):
        assert not tools.wants_render_preview(prompt), prompt

    assert tools.wants_render_preview("compare these graphs")


def test_external_preview_resources_are_packaged_for_the_csp_to_block():
    markup = '<img src="https://example.com/chart.png" alt="chart">'
    out = json.loads(asyncio.run(tools.dispatch("render_preview", {
        "lang": "html", "markup": markup,
    })))
    assert out["ok"] is True
    assert markup in out["fence"]
    assert "issues" not in out


def test_every_preview_language_hints_for_itself():
    for lang in tools.PREVIEW_LANGS:
        assert lang in tools._RENDER_HINTS, lang


def test_normal_tool_results_reach_streaming_turn():
    """Flatten Ollama's tool roles without discarding the retrieved data."""
    from synapse.chat import _strip_internal_turns
    request = {"role": "user", "content": "what GPU do I have?"}
    kept = _strip_internal_turns([
        request,
        {"role": "assistant", "content": "", "tool_calls": [{
            "function": {"name": "search_memory", "arguments": {"query": "GPU"}},
        }]},
        {"role": "tool", "content": '[{"text":"Vega 20 4GB"}]'},
    ])
    assert kept[-1] == request
    assert "Vega 20 4GB" in kept[-2]["content"]
    assert all(m.get("role") != "tool" and not m.get("tool_calls") for m in kept)


def test_render_preview_leaves_jsx_runtime_judgment_to_the_browser():
    sources = (
        "const x = 1;\nconsole.log(x);\n// nothing to mount",
        'import { motion } from "framer-motion"; export default () => <motion.div />;',
        "export default () => <div style={{width: 40}}>tiny</div>;",
    )
    for source in sources:
        out = json.loads(asyncio.run(tools.dispatch("render_preview", {
            "lang": "jsx", "markup": source,
        })))
        assert out["ok"] is True
        assert source in out["fence"]
        assert "issues" not in out


def test_render_preview_allows_react_imports_in_jsx():
    src = """import { useState } from "react";
export default function App() {
  const [n] = useState(0);
  return <p>count is {n} right now</p>;
}"""
    out = json.loads(asyncio.run(tools.dispatch("render_preview", {
        "lang": "jsx", "markup": src,
    })))
    assert out["ok"] is True, out.get("issues")


def test_render_preview_still_rejects_missing_markup():
    out = json.loads(asyncio.run(tools.dispatch("render_preview", {
        "lang": "tsx", "markup": "",
    })))
    assert out["ok"] is False
    assert "markup is required" in out["error"]
    assert "scaffold" not in out


def test_coerce_tool_calls_from_content_json():
    from synapse.chat import _coerce_tool_calls
    # Structured field wins.
    structured = {"role": "assistant", "tool_calls": [
        {"function": {"name": "get_time", "arguments": {}}}
    ]}
    assert _coerce_tool_calls(structured)[0]["function"]["name"] == "get_time"
    # Small models dump a complete call into content.
    content_call = {
        "role": "assistant",
        "content": '{"name":"render_preview","arguments":{"lang":"svg","markup":"<svg/>"}}',
    }
    calls = _coerce_tool_calls(content_call, {"render_preview"})
    assert len(calls) == 1
    assert calls[0]["function"]["name"] == "render_preview"
    assert calls[0]["function"]["arguments"]["lang"] == "svg"

    # JSON quoted as part of an explanation is output, not an instruction to
    # execute a tool (especially important for action tools such as remember).
    embedded = {
        "role": "assistant",
        "content": (
            'For example: {"name":"remember","arguments":{"text":"do not save"}} '
            "is the tool-call shape."
        ),
    }
    assert _coerce_tool_calls(embedded, {"remember"}) == []

    # Even a whole JSON object cannot call a tool that was not advertised.
    assert _coerce_tool_calls(content_call, {"search_memory"}) == []


def test_tool_loop_runs_content_json_tool_call(monkeypatch):
    """qwen-style: first turn returns content-JSON tool call, second returns text."""
    from synapse import chat as chatmod

    class _ContentJsonManager:
        def __init__(self):
            self.n = 0

        async def chat(self, **_):
            self.n += 1
            if self.n == 1:
                return {
                    "role": "assistant",
                    "content": json.dumps({
                        "name": "render_preview",
                        "arguments": {
                            "lang": "svg",
                            "markup": (
                                '<svg xmlns="http://www.w3.org/2000/svg" width="320" height="200">'
                                '<circle cx="160" cy="100" r="60" fill="red"/></svg>'
                            ),
                        },
                    }),
                }
            return {"role": "assistant", "content": "done"}

    statuses, messages = asyncio.run(_drain_with_messages(
        _ContentJsonManager(), "m", tools.standing_schemas(),
        user="draw a circle",
    ))
    assert any(s == "__status__render_preview" for s in statuses)
    tool_msgs = [m for m in messages if m.get("role") == "tool"]
    assert tool_msgs
    assert json.loads(tool_msgs[0]["content"])["ok"] is True


def test_tool_loop_does_not_inject_a_render_preview_nudge():
    class _SkipThenCall:
        def __init__(self):
            self.n = 0

        async def chat(self, **_):
            self.n += 1
            if self.n == 1:
                return {"role": "assistant", "content": "Sure, here is a chart in prose."}
            if self.n == 2:
                return {
                    "role": "assistant",
                    "tool_calls": [{
                        "function": {
                            "name": "render_preview",
                            "arguments": {
                                "lang": "svg",
                                "markup": (
                                    '<svg xmlns="http://www.w3.org/2000/svg" width="480" height="280">'
                                    '<rect width="480" height="280" fill="#111"/>'
                                    '<text x="24" y="150" fill="#eee" font-size="24">hi</text></svg>'
                                ),
                            },
                        }
                    }],
                }
            return {"role": "assistant", "content": "done"}

    statuses, messages = asyncio.run(_drain_with_messages(
        _SkipThenCall(), "m", tools.standing_schemas(),
        user="Visualize the Collatz conjecture with an interactive chart",
    ))
    assert statuses == ["__status__tools"]
    assert len(messages) == 1
    assert messages[0]["content"].startswith("Visualize")


async def _drain_with_messages(manager, model, schemas, user="draw a circle"):
    messages = [{"role": "user", "content": user}]
    statuses = await _drain(
        _run_tool_loop(manager, messages, model, schemas, None, None)
    )
    return statuses, messages