"""Scripts routes 单元测试 — Issue #1795.

CI 增量映射: scripts.py → test_scripts.py
本文件同时覆盖 routes/scripts.py 和 schemas/script.py 的增量覆盖率。
"""

from __future__ import annotations

from datetime import datetime, timezone
from unittest.mock import MagicMock, patch

import pytest
from app.schemas.script import (
    CreateScriptRequest,
    ScriptListResponse,
    ScriptResponse,
    ScriptSegment,
    UpdateScriptRequest,
)

# ── Schema 验证测试 ──────────────────────────────────────────────────────────


class TestScriptSegment:
    def test_segment_with_duration(self):
        s = ScriptSegment(text="测试", duration=5.0)
        assert s.text == "测试"
        assert s.duration == 5.0

    def test_segment_null_duration(self):
        s = ScriptSegment(text="测试", duration=None)
        assert s.duration is None

    def test_segment_default_duration(self):
        s = ScriptSegment(text="测试")
        assert s.duration is None


class TestCreateScriptRequest:
    def test_minimal(self):
        r = CreateScriptRequest(title="标题")
        assert r.title == "标题"
        assert r.content == ""
        assert r.segments == []
        assert r.tags == []

    def test_full(self):
        r = CreateScriptRequest(
            title="标题",
            content="正文",
            segments=[ScriptSegment(text="段1", duration=3.0)],
            tags=["口播"],
        )
        assert len(r.segments) == 1
        assert r.tags == ["口播"]

    def test_title_required(self):
        with pytest.raises(ValueError):
            CreateScriptRequest(title="")  # min_length=1

    def test_title_max_length(self):
        with pytest.raises(ValueError):
            CreateScriptRequest(title="x" * 256)


class TestUpdateScriptRequest:
    def test_all_none_default(self):
        r = UpdateScriptRequest()
        assert r.title is None
        assert r.content is None
        assert r.segments is None
        assert r.tags is None

    def test_partial_update(self):
        r = UpdateScriptRequest(title="新标题")
        assert r.title == "新标题"
        assert r.content is None


class TestScriptResponse:
    def test_response_construction(self):
        now = datetime(2026, 9, 8, 12, 0, 0, tzinfo=timezone.utc)
        r = ScriptResponse(
            id="s1",
            user_id="u1",
            title="标题",
            content="内容",
            segments=[ScriptSegment(text="段1")],
            tags=["t1"],
            created_at=now,
            updated_at=now,
        )
        assert r.id == "s1"
        assert len(r.segments) == 1


class TestScriptListResponse:
    def test_empty_list(self):
        r = ScriptListResponse(items=[], total=0)
        assert r.total == 0
        assert r.items == []

    def test_with_items(self):
        now = datetime(2026, 9, 8, 12, 0, 0, tzinfo=timezone.utc)
        item = ScriptResponse(
            id="s1",
            user_id="u1",
            title="标题",
            content="内容",
            segments=[],
            tags=[],
            created_at=now,
            updated_at=now,
        )
        r = ScriptListResponse(items=[item], total=1)
        assert r.total == 1
        assert len(r.items) == 1


# ── Route handler 逻辑测试 (mock service) ────────────────────────────────────


class TestRouteHandlers:
    """测试路由层逻辑（不通过 TestClient，直接调用 handler 函数）."""

    def _make_auth_user(self, user_id="u1"):
        user = MagicMock()
        user.id = user_id
        auth = MagicMock()
        auth.user = user
        return auth

    def test_create_route_calls_service(self):
        from app.api.routes.scripts import create_script

        svc = MagicMock()
        mock_script = MagicMock()
        mock_script.id = "s1"
        mock_script.user_id = "u1"
        mock_script.title = "测试"
        mock_script.content = "内容"
        mock_script.segments = [{"text": "段1", "duration": None}]
        mock_script.tags = []
        mock_script.created_at = datetime(2026, 9, 8, tzinfo=timezone.utc)
        mock_script.updated_at = datetime(2026, 9, 8, tzinfo=timezone.utc)
        svc.create_script.return_value = mock_script

        req = CreateScriptRequest(title="测试", content="内容")
        auth = self._make_auth_user()

        result = create_script(req, authenticated_user=auth, svc=svc)
        assert result.id == "s1"
        svc.create_script.assert_called_once()

    def test_list_route_returns_paginated(self):
        from app.api.routes.scripts import list_scripts

        svc = MagicMock()
        mock_script = MagicMock()
        mock_script.id = "s1"
        mock_script.user_id = "u1"
        mock_script.title = "测试"
        mock_script.content = ""
        mock_script.segments = []
        mock_script.tags = []
        mock_script.created_at = datetime(2026, 9, 8, tzinfo=timezone.utc)
        mock_script.updated_at = datetime(2026, 9, 8, tzinfo=timezone.utc)
        svc.list_scripts.return_value = ([mock_script], 1)

        auth = self._make_auth_user()
        result = list_scripts(skip=0, limit=50, tag=None, authenticated_user=auth, svc=svc)
        assert result.total == 1
        assert len(result.items) == 1

    def test_get_route_found(self):
        from app.api.routes.scripts import get_script

        svc = MagicMock()
        mock_script = MagicMock()
        mock_script.id = "s1"
        mock_script.user_id = "u1"
        mock_script.title = "测试"
        mock_script.content = ""
        mock_script.segments = []
        mock_script.tags = []
        mock_script.created_at = datetime(2026, 9, 8, tzinfo=timezone.utc)
        mock_script.updated_at = datetime(2026, 9, 8, tzinfo=timezone.utc)
        svc.get_script.return_value = mock_script

        auth = self._make_auth_user()
        result = get_script("s1", authenticated_user=auth, svc=svc)
        assert result.id == "s1"

    def test_get_route_not_found(self):
        from app.api.routes.scripts import get_script
        from app.services.script_service import ScriptNotFoundError
        from fastapi import HTTPException

        svc = MagicMock()
        svc.get_script.side_effect = ScriptNotFoundError("not found")
        auth = self._make_auth_user()

        with pytest.raises(HTTPException) as exc_info:
            get_script("nonexistent", authenticated_user=auth, svc=svc)
        assert exc_info.value.status_code == 404

    def test_update_route_success(self):
        from app.api.routes.scripts import update_script

        svc = MagicMock()
        mock_script = MagicMock()
        mock_script.id = "s1"
        mock_script.user_id = "u1"
        mock_script.title = "新标题"
        mock_script.content = "原内容"
        mock_script.segments = []
        mock_script.tags = []
        mock_script.created_at = datetime(2026, 9, 8, tzinfo=timezone.utc)
        mock_script.updated_at = datetime(2026, 9, 8, tzinfo=timezone.utc)
        svc.update_script.return_value = mock_script

        req = UpdateScriptRequest(title="新标题")
        auth = self._make_auth_user()
        result = update_script("s1", req, authenticated_user=auth, svc=svc)
        assert result.title == "新标题"

    def test_update_route_not_found(self):
        from app.api.routes.scripts import update_script
        from app.services.script_service import ScriptNotFoundError
        from fastapi import HTTPException

        svc = MagicMock()
        svc.update_script.side_effect = ScriptNotFoundError("not found")
        auth = self._make_auth_user()
        req = UpdateScriptRequest(title="x")

        with pytest.raises(HTTPException) as exc_info:
            update_script("bad", req, authenticated_user=auth, svc=svc)
        assert exc_info.value.status_code == 404

    def test_delete_route_success(self):
        from app.api.routes.scripts import delete_script

        svc = MagicMock()
        svc.delete_script.return_value = True
        auth = self._make_auth_user()

        result = delete_script("s1", authenticated_user=auth, svc=svc)
        # Should return None (204 No Content)
        assert result is None

    def test_delete_route_not_found(self):
        from app.api.routes.scripts import delete_script
        from fastapi import HTTPException

        svc = MagicMock()
        svc.delete_script.return_value = False
        auth = self._make_auth_user()

        with pytest.raises(HTTPException) as exc_info:
            delete_script("bad", authenticated_user=auth, svc=svc)
        assert exc_info.value.status_code == 404