import unittest

from app.services.oa_related_approval import (
    extract_related_approval_links,
    flatten_form_fields_for_summary,
    merge_relation_targets,
)


class TestFlatten(unittest.TestCase):
    def test_skips_layout_and_summarizes_upload(self):
        schema = {
            "rule": [
                {"type": "html", "title": "说明"},
                {"type": "input", "field": "reason", "title": "事由"},
                {"type": "upload", "field": "files", "title": "附件"},
                {"type": "relatedApproval", "field": "prev", "title": "关联"},
                {"type": "textarea", "field": "long", "title": "详细说明"},
            ]
        }
        data = {
            "reason": "出差",
            "files": ["https://cdn.example.com/a.png", "https://cdn.example.com/b.png"],
            "prev": ["id1", "id2"],
            "long": "很长很长的说明文字" * 5,
        }
        fields = flatten_form_fields_for_summary(schema, data)
        labels = [f["label"] for f in fields]
        self.assertNotIn("说明", labels)
        self.assertEqual(fields[0], {"label": "事由", "value": "出差"})
        self.assertEqual(
            fields[1]["value"],
            "https://cdn.example.com/a.png、https://cdn.example.com/b.png",
        )
        self.assertTrue(fields[1].get("fullWidth"))
        self.assertEqual(fields[2]["value"], "已关联 2 条")
        self.assertEqual(fields[2].get("relatedIds"), ["id1", "id2"])
        self.assertTrue(fields[3].get("fullWidth"))

    def test_dept_formats_path_names(self):
        schema = {
            "rule": [
                {"type": "dept", "field": "dept", "title": "部门"},
                {
                    "type": "dept",
                    "field": "depts",
                    "title": "多部门",
                    "props": {"multiple": True},
                },
            ]
        }
        data = {
            "dept": {"id": "d1", "name": "中科兴皖 / 研发"},
            "depts": [
                {"id": "d1", "name": "中科兴皖 / 研发"},
                {"id": "d2", "name": "中科兴皖 / 质量"},
            ],
        }
        fields = flatten_form_fields_for_summary(schema, data)
        by_label = {f["label"]: f["value"] for f in fields}
        self.assertEqual(by_label["部门"], "中科兴皖 / 研发")
        self.assertEqual(by_label["多部门"], "中科兴皖 / 研发、中科兴皖 / 质量")

    def test_related_approval_field_includes_related_ids(self):
        schema = {
            "rule": [
                {"type": "input", "field": "reason", "title": "事由"},
                {"type": "relatedApproval", "field": "prev", "title": "关联审批单"},
            ]
        }
        data = {"reason": "拜访", "prev": ["id1", "", "id2", "id1"]}
        fields = flatten_form_fields_for_summary(schema, data)
        rel = next(f for f in fields if f["label"] == "关联审批单")
        self.assertEqual(rel["value"], "已关联 2 条")
        self.assertEqual(rel["relatedIds"], ["id1", "id2"])

    def test_related_approval_empty_ids(self):
        schema = {"rule": [{"type": "relatedApproval", "field": "prev", "title": "关联"}]}
        fields = flatten_form_fields_for_summary(schema, {"prev": []})
        self.assertEqual(fields[0]["value"], "已关联 0 条")
        self.assertEqual(fields[0]["relatedIds"], [])

    def test_upload_object_list_extracts_url(self):
        schema = {"rule": [{"type": "upload", "field": "files", "title": "附件"}]}
        data = {
            "files": [
                {"name": "a.pdf", "url": "https://cdn.example.com/a.pdf"},
                {"name": "b.pdf", "response": {"data": {"fileUrl": "/mini/b.pdf"}}},
            ]
        }
        fields = flatten_form_fields_for_summary(schema, data)
        self.assertEqual(
            fields[0]["value"],
            "https://cdn.example.com/a.pdf、/mini/b.pdf",
        )

    def test_extract_links_with_field_key_and_dedupe(self):
        schema = {
            "rule": [
                {"type": "relatedApproval", "field": "relA"},
                {
                    "type": "fcRow",
                    "children": [{"type": "relatedApproval", "field": "relB"}],
                },
            ]
        }
        data = {"relA": ["x", "x", ""], "relB": "solo"}
        links = extract_related_approval_links(schema, data)
        self.assertEqual(links, [("relA", "x"), ("relB", "solo")])


class TestValidateLinkable(unittest.TestCase):
    def test_rejects_non_completed(self):
        from app.services.oa_related_approval import assert_linkable_instance
        from app.services.oa_engine import OaEngineError
        from unittest.mock import MagicMock

        inst = MagicMock(status="running", initiator_user_id="u1", tenant_no="t", del_flag=0)
        with self.assertRaises(OaEngineError):
            assert_linkable_instance(inst, user_id="u1", tenant_no="t")


class TestMergeRelationTargets(unittest.TestCase):
    def test_merge_prefers_form_fields(self):
        schema = {"rule": [{"type": "relatedApproval", "field": "r1"}]}
        m = merge_relation_targets(schema, {"r1": ["a"]}, ["a", "b"])
        self.assertEqual(m, [("r1", "a"), (None, "b")])


if __name__ == "__main__":
    unittest.main()