import pytest
from docx import Document
from pathlib import Path

from django.conf import settings
from review_agent.models import Conversation, RegulatoryInfoPackageBatch
from review_agent.regulatory_info_package.services.field_merge import merge_fields
from review_agent.regulatory_info_package.services.package_generate import generate_package_documents
from review_agent.regulatory_info_package.services.template_config import load_template_config


pytestmark = pytest.mark.django_db


def test_template_config_uses_clean_internal_templates():
    config = load_template_config()
    source_dir = Path(config["source_dir"])

    assert source_dir == settings.BASE_DIR / "review_agent" / "regulatory_info_package" / "templates" / "clean"
    assert source_dir.exists()
    assert len(config["templates"]) == 7
    assert all((source_dir / item["source_file"]).exists() for item in config["templates"])


def test_clean_templates_expose_stable_fill_placeholders():
    config = load_template_config()
    source_dir = Path(config["source_dir"])
    expected_by_code = {
        "ch1_2_directory": {"{{product_name}}", "{{applicant_name}}"},
        "ch1_4_application_form": {"{{product_name}}", "{{applicant_name}}"},
        "ch1_5_product_list": {"{{product_name}}", "{{package_specification}}"},
        "ch1_9_pre_submission": {"{{product_name}}", "{{applicant_name}}"},
        "ch1_11_1_standards": {"{{standard_no}}", "{{product_name}}"},
        "ch1_11_5_authenticity": {"{{product_name}}", "{{applicant_name}}"},
        "ch1_11_6_conformity": {"{{product_name}}", "{{applicant_name}}"},
    }

    for item in config["templates"]:
        document = Document(source_dir / item["source_file"])
        text = _document_text(document)
        for placeholder in expected_by_code[item["code"]]:
            assert placeholder in text


def test_generate_package_documents_creates_seven_results(django_user_model, tmp_path):
    user = django_user_model.objects.create_user(username="owner", password="pass")
    conversation = Conversation.objects.create(user=user, title="会话")
    batch = RegulatoryInfoPackageBatch.objects.create(
        conversation=conversation,
        user=user,
        batch_no="RIP-20260610154000-abcdef",
        work_dir=str(tmp_path),
    )
    merged, _summary = merge_fields({"product_name": {"value": "测试产品", "label": "产品名称"}}, {})

    results = generate_package_documents(batch, load_template_config(), merged)

    assert len(results) == 7
    assert all(result.status in {"success", "fallback_success"} for result in results), [
        (result.template_code, result.status, result.error_message) for result in results
    ]
    assert all(result.path for result in results)


def test_generated_docx_has_visible_prefill_block_near_top(django_user_model, tmp_path):
    user = django_user_model.objects.create_user(username="owner", password="pass")
    conversation = Conversation.objects.create(user=user, title="会话")
    batch = RegulatoryInfoPackageBatch.objects.create(
        conversation=conversation,
        user=user,
        batch_no="RIP-20260610154100-abcdef",
        work_dir=str(tmp_path),
    )
    merged, _summary = merge_fields({"product_name": {"value": "测试产品", "label": "产品名称"}}, {})

    results = generate_package_documents(batch, load_template_config(), merged)
    docx_result = next(result for result in results if result.template_code == "ch1_2_directory")
    document = Document(docx_result.path)
    first_text = "\n".join(paragraph.text for paragraph in document.paragraphs[:8])

    assert "预生成版" in first_text
    assert "测试产品" in first_text


def test_generated_docx_replaces_sample_case_content(django_user_model, tmp_path):
    user = django_user_model.objects.create_user(username="owner", password="pass")
    conversation = Conversation.objects.create(user=user, title="会话")
    batch = RegulatoryInfoPackageBatch.objects.create(
        conversation=conversation,
        user=user,
        batch_no="RIP-20260610154200-abcdef",
        work_dir=str(tmp_path),
    )
    merged, _summary = merge_fields(
        {
            "product_name": {"value": "测试产品", "label": "产品名称"},
            "package_specification": {"value": "24人份/盒；48人份/盒", "label": "包装规格"},
        },
        {},
    )

    results = generate_package_documents(batch, load_template_config(), merged)
    docx_results = [result for result in results if result.actual_format == "docx"]
    for result in docx_results:
        document = Document(result.path)
        text = "\n".join(paragraph.text for paragraph in document.paragraphs)
        for table in document.tables:
            for row in table.rows:
                text += "\n" + "\t".join(cell.text for cell in row.cells)
        assert "呼吸道合胞病毒、肺炎支原体核酸检测试剂盒" not in text
    product_list = next(result for result in results if result.template_code == "ch1_5_product_list")
    product_doc = Document(product_list.path)
    table = product_doc.tables[0]
    assert table.rows[1].cells[0].text == "24人份/盒"
    assert table.rows[1].cells[1].text == "/"
    assert "6018003102" not in "\n".join(cell.text for row in table.rows for cell in row.cells)


def test_generated_docs_fill_clean_template_body(django_user_model, tmp_path):
    user = django_user_model.objects.create_user(username="owner", password="pass")
    conversation = Conversation.objects.create(user=user, title="会话")
    batch = RegulatoryInfoPackageBatch.objects.create(
        conversation=conversation,
        user=user,
        batch_no="RIP-20260610154300-abcdef",
        work_dir=str(tmp_path),
    )
    merged, _summary = merge_fields(
        {
            "product_name": {"value": "甲型流感病毒核酸检测试剂盒", "label": "产品名称"},
            "applicant_name": {"value": "星河医疗科技有限公司", "label": "申请人名称"},
            "package_specification": {"value": "24人份/盒；48人份/盒", "label": "包装规格"},
            "standard_no": {"value": "GB/T 29791.1-2013", "label": "标准号"},
        },
        {},
    )

    results = generate_package_documents(batch, load_template_config(), merged)

    for code in ["ch1_2_directory", "ch1_4_application_form", "ch1_11_5_authenticity", "ch1_11_6_conformity"]:
        result = next(item for item in results if item.template_code == code)
        text = _document_text(Document(result.path))
        assert "甲型流感病毒核酸检测试剂盒" in text
        assert "星河医疗科技有限公司" in text
        assert "{{" not in text
        assert "}}" not in text

    standards = next(item for item in results if item.template_code == "ch1_11_1_standards")
    standards_text = _document_text(Document(standards.path))
    assert "GB/T 29791.1-2013" in standards_text

    product_list = next(item for item in results if item.template_code == "ch1_5_product_list")
    product_text = _document_text(Document(product_list.path))
    assert "24人份/盒" in product_text
    assert "48人份/盒" in product_text


def _document_text(document: Document) -> str:
    text = "\n".join(paragraph.text for paragraph in document.paragraphs)
    for table in document.tables:
        for row in table.rows:
            text += "\n" + "\t".join(cell.text for cell in row.cells)
    return text