"""
Tests for the routing CLI flags (IB-WP-0020-T03).

Three levels:
- _adapter_for("routing") unit checks — missing config, happy path
- run_generation end-to-end through --provider routing with a stubbed
  OpenRouterAdapter.execute_prompt so no network is required
- CLI subprocess smoke that proves the new flags are wired
"""

from __future__ import annotations

import json
import os
import subprocess
import sys
import zipfile
from pathlib import Path

import pytest
import yaml

from infospace_bench.errors import InfospaceError
from infospace_bench.generator import (
    _adapter_for,
    init_generation_infospace,
    run_generation,
    status_generation,
)
from infospace_bench.routing import RoutingAssistedGenerationAdapter


FIXTURE_ROOT = Path(__file__).parent / "fixtures" / "lefevre"


def _build_fixture_epub(target: Path) -> Path:
    sources = FIXTURE_ROOT / "sources"
    layout: dict[str, str] = {
        "mimetype": "application/epub+zip",
        "META-INF/container.xml": (sources / "container.xml").read_text(encoding="utf-8"),
    }
    for source in sorted(sources.glob("*.xhtml")):
        layout[f"OEBPS/{source.name}"] = source.read_text(encoding="utf-8")
    layout["OEBPS/content.opf"] = (sources / "content.opf").read_text(encoding="utf-8")
    with zipfile.ZipFile(target, "w") as archive:
        for path_in_zip, contents in layout.items():
            archive.writestr(path_in_zip, contents)
    return target


def _write_routing_config(path: Path, *, ledger_relpath: str | None = None) -> None:
    """Minimal routing config that maps every fixture stage to one cheap candidate."""
    data: dict = {
        "schema_version": 1,
        "stage_to_task_type": {
            "summarize-source": "cheap",
            "extract-entities": "cheap",
            "extract-relations": "cheap",
            "evaluate-entity": "cheap",
            "synthesize-report": "cheap",
        },
        "task_types": {
            "cheap": {
                "candidates": [
                    {
                        "id": "openrouter:gpt-4o-mini",
                        "provider": "openrouter",
                        "model": "openai/gpt-4o-mini",
                        "api_key_env": "OPENROUTER_API_KEY",
                    },
                ],
            },
        },
    }
    if ledger_relpath is not None:
        data["ledger_path"] = ledger_relpath
    path.write_text(yaml.safe_dump(data, sort_keys=False), encoding="utf-8")


def test_adapter_for_routing_missing_config_raises() -> None:
    with pytest.raises(InfospaceError) as exc_info:
        _adapter_for("routing", model="", fixture_responses=None, routing_config=None)
    assert exc_info.value.code == "missing_routing_config"


def test_adapter_for_routing_returns_bridge(tmp_path: Path, monkeypatch) -> None:
    monkeypatch.setenv("OPENROUTER_API_KEY", "sk-fake-test-key")
    config_path = tmp_path / "routing.yaml"
    _write_routing_config(config_path)

    adapter = _adapter_for(
        "routing",
        model="",
        fixture_responses=None,
        routing_config=config_path,
        workspace=tmp_path,
    )

    assert isinstance(adapter, RoutingAssistedGenerationAdapter)
    assert adapter.stage_to_task_type["summarize-source"] == "cheap"


_FIXTURE_RESPONSES = {
    "summarize-source": "# Source Summary\n\nFixture summary content.\n",
    "extract-entities": (
        "# Stub Entity\n\n"
        "## Category\n\nstrategy\n\n"
        "## Definition\n\nA stub trading concept for the routing CLI smoke.\n"
    ),
    "extract-relations": (
        "# Stub Entity Practices Tape Reading\n\n"
        "## Subject\n\nStub Entity\n\n"
        "## Predicate\n\npractices\n\n"
        "## Object\n\nTape Reading\n\n"
        "## Relation Type\n\nstrategy_outcome\n\n"
        "## Evidence\n\nFixture evidence.\n"
    ),
    "evaluate-entity": (
        "---\n"
        "artifact_id: entity/stub-entity.md\n"
        "evaluator: fixture\n"
        "evaluated_at: '2026-05-18T00:00:00'\n"
        "scores:\n"
        "  - name: groundedness\n    value: 4.0\n    max_value: 5.0\n"
        "  - name: lesson_clarity\n    value: 4.0\n    max_value: 5.0\n"
        "  - name: historical_context\n    value: 4.0\n    max_value: 5.0\n"
        "  - name: overgeneralization_risk\n    value: 4.0\n    max_value: 5.0\n"
        "---\n\n"
        "# Evaluation: entity/stub-entity.md\n"
    ),
    "synthesize-report": "# Routed Report\n\nFixture report.\n",
}


def _stub_openrouter_execute(self, prompt, config):
    """Replacement for OpenRouterAdapter.execute_prompt that returns canned content.

    Identifies the stage from the rendered template's H1 line (templates
    start with ``# Extract Entities`` / ``# Extract Relations`` / ``# Evaluate
    ...`` / ``# Synthesize ...``; anything else is treated as the
    summarize-source stage).
    """
    from llm_connect.models import LLMResponse

    first_line = prompt.lstrip().splitlines()[0] if prompt.strip() else ""
    lower = first_line.lower()
    if lower.startswith("# extract") and "entit" in lower:
        content = _FIXTURE_RESPONSES["extract-entities"]
    elif lower.startswith("# extract") and "relation" in lower:
        content = _FIXTURE_RESPONSES["extract-relations"]
    elif lower.startswith("# evaluate"):
        content = _FIXTURE_RESPONSES["evaluate-entity"]
    elif lower.startswith("# synthesize"):
        content = _FIXTURE_RESPONSES["synthesize-report"]
    else:
        content = _FIXTURE_RESPONSES["summarize-source"]
    return LLMResponse(
        content=content,
        model=getattr(self, "_model", "openai/gpt-4o-mini"),
        usage={"prompt_tokens": len(prompt.split()), "completion_tokens": 40},
        finish_reason="stop",
        metadata={"request_id": "or-stub-1"},
    )


def test_run_generation_via_routing_provider_completes_end_to_end(
    tmp_path: Path, monkeypatch
) -> None:
    monkeypatch.setenv("OPENROUTER_API_KEY", "sk-fake-test-key")
    from llm_connect.openrouter import OpenRouterAdapter

    monkeypatch.setattr(
        OpenRouterAdapter, "execute_prompt", _stub_openrouter_execute, raising=True
    )

    book = _build_fixture_epub(tmp_path / "lefevre.epub")
    config_path = tmp_path / "routing.yaml"
    _write_routing_config(config_path)

    infospace = init_generation_infospace(
        tmp_path,
        book,
        "lefevre-routing-smoke",
        name="Lefevre Routing Smoke",
        profile="trading-literature",
        chapter_filter=["I"],
    )
    result = run_generation(
        infospace.root,
        provider="routing",
        routing_config=config_path,
    )
    status = status_generation(infospace.root)

    assert result.status == "completed"
    assert status["source_chunk_count"] == 1
    assert status["entity_count"] >= 1
    assert status["evaluation_count"] >= 1

    report = (infospace.root / "reports" / "generation-summary.md").read_text(encoding="utf-8")
    assert "## Per-stage adapter choices" in report
    assert "openai/gpt-4o-mini" in report  # adapter_id ends with the model

    # Budget usage rollup should bucket calls by the routed model.
    import yaml as _yaml

    usage = _yaml.safe_load((infospace.root / "output" / "budget" / "usage.yaml").read_text(encoding="utf-8"))
    bucket_models = {b["model"] for b in usage["runs"][0]["per_bucket"]}
    assert "openai/gpt-4o-mini" in bucket_models


def test_from_source_cli_provider_routing(tmp_path: Path, monkeypatch) -> None:
    book = _build_fixture_epub(tmp_path / "lefevre.epub")
    config_path = tmp_path / "routing.yaml"
    _write_routing_config(config_path)

    env = os.environ.copy()
    env["PYTHONPATH"] = "src:/home/worsch/markitect-tool/src:/home/worsch/llm-connect"

    # Missing API key → fast fail from the loader, no subprocess crash.
    env.pop("OPENROUTER_API_KEY", None)
    bad = subprocess.run(
        [
            sys.executable,
            "-m",
            "infospace_bench",
            "generate",
            "from-source",
            str(book),
            "--workspace",
            str(tmp_path),
            "--slug",
            "routing-cli-missing-key",
            "--name",
            "Routing CLI Missing Key",
            "--profile",
            "trading-literature",
            "--provider",
            "routing",
            "--routing-config",
            str(config_path),
            "--chapter",
            "I",
            "--apply",
        ],
        check=False,
        env=env,
        text=True,
        capture_output=True,
    )
    assert bad.returncode != 0
    assert "missing_routing_api_key" in (bad.stdout + bad.stderr)


def test_run_via_routing_resolves_workspace_relative_ledger(
    tmp_path: Path, monkeypatch
) -> None:
    monkeypatch.setenv("OPENROUTER_API_KEY", "sk-fake-test-key")
    from llm_connect.openrouter import OpenRouterAdapter

    monkeypatch.setattr(
        OpenRouterAdapter, "execute_prompt", _stub_openrouter_execute, raising=True
    )

    book = _build_fixture_epub(tmp_path / "lefevre.epub")
    config_path = tmp_path / "routing.yaml"
    _write_routing_config(config_path, ledger_relpath="output/routing/quality.jsonl")

    infospace = init_generation_infospace(
        tmp_path,
        book,
        "lefevre-routing-ledger",
        name="Lefevre Routing Ledger",
        profile="trading-literature",
        chapter_filter=["I"],
    )
    run_generation(
        infospace.root,
        provider="routing",
        routing_config=config_path,
        quality_floor=0.7,
    )

    # ledger_path is relative to the workspace (tmp_path), not the infospace root.
    ledger_path = tmp_path / "output" / "routing" / "quality.jsonl"
    assert ledger_path.parent.is_dir(), "loader must create the ledger parent dir"