"""Tests for T03 — style listing across CLI, REST, MCP (FR-907)."""

from __future__ import annotations

import json

import pytest
from fastapi.testclient import TestClient

import markidocx.mcp_server as mcp_module
from markidocx.rest import create_app


@pytest.fixture()
def rest_client() -> TestClient:
    return TestClient(create_app())


class TestListStylesFunction:
    def test_returns_non_empty_list(self) -> None:
        from markidocx.templates import list_styles

        entries = list_styles()
        assert len(entries) > 0

    def test_standard_heading_styles_present(self) -> None:
        from markidocx.templates import list_styles

        entries = list_styles(family="article")
        names = {e.name for e in entries}
        # Standard Word styles that python-docx always creates
        assert any("Heading" in n or "Normal" in n for n in names)

    def test_family_field_matches_requested(self) -> None:
        from markidocx.templates import list_styles

        for family in ("article", "book", "website"):
            entries = list_styles(family=family)
            assert all(e.family == family for e in entries)

    def test_sorted_by_type_then_name(self) -> None:
        from markidocx.templates import list_styles

        entries = list_styles()
        pairs = [(e.type, e.name) for e in entries]
        assert pairs == sorted(pairs)

    def test_style_entry_fields(self) -> None:
        from markidocx.templates import list_styles

        entries = list_styles()
        for e in entries:
            assert isinstance(e.name, str) and e.name
            assert isinstance(e.style_id, str) and e.style_id
            assert e.type in ("paragraph", "character", "table", "numbering")
            assert isinstance(e.built_in, bool)

    def test_each_built_in_family_has_styles(self) -> None:
        from markidocx.templates import list_styles

        for family in ("article", "book", "website"):
            entries = list_styles(family=family)
            assert len(entries) > 0, f"No styles for family {family!r}"


class TestRestStylesEndpoint:
    def test_get_styles_returns_list(self, rest_client: TestClient) -> None:
        resp = rest_client.get("/styles")
        assert resp.status_code == 200
        data = resp.json()
        assert data["status"] == "ok"
        assert isinstance(data["outputs"], list)
        assert len(data["outputs"]) > 0

    def test_get_styles_with_family(self, rest_client: TestClient) -> None:
        resp = rest_client.get("/styles?family=book")
        assert resp.status_code == 200
        data = resp.json()
        assert all(e["family"] == "book" for e in data["outputs"])

    def test_get_styles_has_required_fields(self, rest_client: TestClient) -> None:
        resp = rest_client.get("/styles")
        data = resp.json()
        for entry in data["outputs"]:
            assert "name" in entry
            assert "style_id" in entry
            assert "type" in entry
            assert "family" in entry
            assert "built_in" in entry


class TestMcpListStyles:
    def test_list_styles_returns_non_empty(self) -> None:
        result = mcp_module.list_styles()
        assert isinstance(result, list)
        assert len(result) > 0

    def test_list_styles_with_family(self) -> None:
        result = mcp_module.list_styles(family="website")
        assert all(e["family"] == "website" for e in result)


class TestCliTemplateStyles:
    def test_template_styles_command(self) -> None:
        from typer.testing import CliRunner

        from markidocx.cli import app

        runner = CliRunner()
        result = runner.invoke(app, ["template", "styles"])
        assert result.exit_code == 0

    def test_template_styles_json(self) -> None:
        from typer.testing import CliRunner

        from markidocx.cli import app

        runner = CliRunner()
        result = runner.invoke(app, ["template", "styles", "--json"])
        assert result.exit_code == 0
        data = json.loads(result.output.strip())
        assert isinstance(data, list)
        assert len(data) > 0
        assert "name" in data[0]

    def test_template_styles_family_filter(self) -> None:
        from typer.testing import CliRunner

        from markidocx.cli import app

        runner = CliRunner()
        result = runner.invoke(app, ["template", "styles", "--family", "book", "--json"])
        assert result.exit_code == 0
        data = json.loads(result.output.strip())
        assert all(e["family"] == "book" for e in data)


class TestStylesParityAcrossInterfaces:
    def test_rest_mcp_same_count_for_article(self, rest_client: TestClient) -> None:
        rest_entries = rest_client.get("/styles?family=article").json()["outputs"]
        mcp_entries = mcp_module.list_styles(family="article")
        assert len(rest_entries) == len(mcp_entries)

    def test_rest_mcp_same_names_for_article(self, rest_client: TestClient) -> None:
        rest_names = {e["name"] for e in rest_client.get("/styles?family=article").json()["outputs"]}
        mcp_names = {e["name"] for e in mcp_module.list_styles(family="article")}
        assert rest_names == mcp_names