"""Legacy UI compatibility routes backed by v2 generation."""

from __future__ import annotations

import io
import zipfile
from pathlib import Path

import pytest
from docx import Document
from fastapi.testclient import TestClient

from backend.config import settings
from backend.core import ingest, template_discoverer
from backend.main import app


@pytest.fixture
def client():
    return TestClient(app)


def _seed_tenant(tmp_path: Path, monkeypatch, tenant: str = "legacy-ui") -> None:
    monkeypatch.setattr(settings, "data_dir", str(tmp_path / "data"))
    monkeypatch.setattr(settings, "openai_api_key", "")

    tpl = tmp_path / "template.docx"
    doc = Document()
    doc.add_paragraph("D2 Roof coverings")
    doc.add_paragraph("D1 Chimney stacks")
    doc.save(str(tpl))

    past = tmp_path / "past.docx"
    doc2 = Document()
    doc2.add_paragraph("D2 Roof coverings")
    doc2.add_paragraph(
        "The roof is covered with concrete interlocking tiles laid to pitched timber rafters."
    )
    doc2.add_paragraph("D1 Chimney stacks")
    doc2.add_paragraph("Chimney pots appear serviceable from ground level.")
    doc2.save(str(past))

    ingest.ingest_report_template(tenant, tpl)
    ingest.ingest_reference(tenant, past)


def test_legacy_auth_passphrase_and_catalog(tmp_path, monkeypatch, client):
    tenant = "legacy-auth"
    _seed_tenant(tmp_path, monkeypatch, tenant)

    r = client.post("/auth/register", json={"tenant_id": tenant, "passphrase": "secret123"})
    assert r.status_code == 201
    body = r.json()
    assert body["access_token"]
    assert body["tenant_id"] == tenant
    token = body["access_token"]

    r = client.get("/auth/me", headers={"Authorization": f"Bearer {token}"})
    assert r.status_code == 200

    r = client.get("/templates/catalog?survey_level=3", headers={"Authorization": f"Bearer {token}"})
    assert r.status_code == 200
    cat = r.json()
    assert any(s["code"] == "D2" for s in cat["sections"])


def test_legacy_upload_to_export_flow(tmp_path, monkeypatch, client):
    tenant = "legacy-flow"
    _seed_tenant(tmp_path, monkeypatch, tenant)

    r = client.post("/auth/register", json={"tenant_id": tenant, "passphrase": "secret123"})
    token = r.json()["access_token"]
    headers = {"Authorization": f"Bearer {token}"}

    past = tmp_path / "ref.docx"
    doc = Document()
    doc.add_paragraph("D2 Roof coverings")
    doc.add_paragraph("The roof comprises slate tiles to pitched rafters.")
    doc.save(str(past))

    with past.open("rb") as fh:
        r = client.post(
            "/upload/batch",
            headers=headers,
            files=[("files", ("ref.docx", fh, "application/vnd.openxmlformats-officedocument.wordprocessingml.document"))],
        )
    assert r.status_code == 201
    up = r.json()
    assert up["accepted"] == 1
    doc_id = up["items"][0]["document_id"]

    r = client.post("/documents/batch-status", headers=headers, json={"document_ids": [doc_id]})
    assert r.json()["complete"] == 1

    r = client.get("/documents/tenant-chunk-summary", headers=headers)
    assert r.json()["indexed_chunk_count"] > 0

    r = client.post(f"/reports?document_id={doc_id}&survey_level=3", headers=headers)
    assert r.status_code == 200
    report_id = r.json()["report_id"]

    r = client.get(f"/reports/{report_id}/photo-policy", headers=headers)
    assert r.status_code == 200

    r = client.post(
        f"/reports/{report_id}/generate",
        headers=headers,
        json={
            "template_id": "D2",
            "bullets": ["slate tile slipped south slope"],
            "mode": "generate",
            "interference_level": "minimum",
        },
    )
    assert r.status_code == 200

    for _ in range(60):
        st = client.get(f"/reports/{report_id}/status", headers=headers).json()
        if st["status"] in ("complete", "partial", "failed"):
            break
        import time
        time.sleep(0.1)
    assert st["status"] == "complete"

    r = client.get(f"/reports/{report_id}/sections", headers=headers)
    sections = r.json()["sections"]
    assert "D2" in sections
    assert sections["D2"]["text"]
    assert sections["D2"]["provenance"]

    r = client.get(f"/reports/{report_id}/export?format=docx", headers=headers)
    assert r.status_code == 200
    with zipfile.ZipFile(io.BytesIO(r.content)) as zf:
        xml = zf.read("word/document.xml").decode("utf-8")
    assert "slate" in xml.lower() or "roof" in xml.lower()
    prov = sections["D2"]["provenance"]
    source_name = prov[0].get("filename") or prov[0].get("doc_id") or ""
    if source_name.startswith("reference:"):
        source_name = source_name.split(":", 1)[-1]
    assert source_name in xml
    assert "Source:" in xml


def test_serves_legacy_index_html(client):
    r = client.get("/")
    assert r.status_code == 200
    assert "Report Genius" in r.text


def test_extract_notes_txt(client):
    r = client.post(
        "/extract-notes",
        files=[("file", ("notes.txt", b"E2: slate tile slipped\nD1: chimney pots ok", "text/plain"))],
    )
    assert r.status_code == 200
    body = r.json()
    assert body["line_count"] >= 2
    assert any("slate" in ln.lower() for ln in body["lines"])


def test_route_notes_screenshot_cases(client):
    r = client.post(
        "/route-notes",
        json={
            "lines": [
                "Main roof: Pitched valley-style roof with imitation slate covering. "
                "Some tiles have slipped. Valley gutters appear to be in good condition.",
                "Rainwater fittings: UPVC gutters and gullies present. Rainwater downpipe discharges below ground.",
            ]
        },
    )
    assert r.status_code == 200
    body = r.json()
    assert body["routed_line_count"] == 2
    assert any("Main roof" in ln for ln in body["routed"].get("D2", []))
    assert any("Rainwater fittings" in ln for ln in body["routed"].get("D3", []))
    assert "D4" not in body["routed"]


def test_document_delete_and_similarity(tmp_path, monkeypatch, client):
    tenant = "legacy-docs"
    _seed_tenant(tmp_path, monkeypatch, tenant)

    r = client.post("/auth/register", json={"tenant_id": tenant, "passphrase": "secret123"})
    token = r.json()["access_token"]
    headers = {"Authorization": f"Bearer {token}"}

    past = tmp_path / "ref2.docx"
    doc = Document()
    doc.add_paragraph("D2 Roof coverings")
    doc.add_paragraph("Concrete tile roof in fair condition with minor moss.")
    doc.save(str(past))

    with past.open("rb") as fh:
        r = client.post(
            "/upload/batch",
            headers=headers,
            files=[("files", ("ref2.docx", fh, "application/vnd.openxmlformats-officedocument.wordprocessingml.document"))],
        )
    doc_id = r.json()["items"][0]["document_id"]

    r = client.post(
        "/content/similar",
        headers=headers,
        json={
            "text": "concrete tile roof moss growth south elevation",
            "section_code": "D2",
            "peer_sections": {},
            "limit": 5,
            "min_relevance_percent": 10,
        },
    )
    assert r.status_code == 200
    sim = r.json()
    assert "library_matches" in sim

    r = client.delete(f"/documents/{doc_id}", headers=headers)
    assert r.status_code == 200
    assert r.json()["deleted"] is True

    r = client.get("/documents", headers=headers)
    ids = [d["document_id"] for d in r.json()["documents"]]
    assert doc_id not in ids


def test_proofread_mode(tmp_path, monkeypatch, client):
    tenant = "legacy-proof"
    _seed_tenant(tmp_path, monkeypatch, tenant)

    r = client.post("/auth/register", json={"tenant_id": tenant, "passphrase": "secret123"})
    token = r.json()["access_token"]
    headers = {"Authorization": f"Bearer {token}"}

    past = tmp_path / "past.docx"
    doc = Document()
    doc.add_paragraph("D2 Roof coverings")
    doc.add_paragraph("The roof comprises slate tiles to pitched rafters.")
    doc.save(str(past))

    with past.open("rb") as fh:
        up = client.post(
            "/upload/batch",
            headers=headers,
            files=[("files", ("past.docx", fh, "application/vnd.openxmlformats-officedocument.wordprocessingml.document"))],
        )
    doc_id = up.json()["items"][0]["document_id"]

    r = client.post(f"/reports?document_id={doc_id}&survey_level=3", headers=headers)
    report_id = r.json()["report_id"]

    draft = "The roof comprise slate tiles to pitched rafters."
    r = client.post(
        f"/reports/{report_id}/generate",
        headers=headers,
        json={
            "template_id": "D2",
            "bullets": ["slate tiles"],
            "mode": "proofread",
            "draft_paragraph": draft,
        },
    )
    assert r.status_code == 200

    import time
    for _ in range(60):
        st = client.get(f"/reports/{report_id}/status", headers=headers).json()
        if st["status"] in ("complete", "failed"):
            break
        time.sleep(0.1)
    assert st["status"] == "complete"

    sections = client.get(f"/reports/{report_id}/sections", headers=headers).json()["sections"]
    assert sections["D2"]["mode"] == "proofread"
    assert sections["D2"]["text"]
    assert sections["D2"].get("style_profile") is not None