from datetime import date
from io import BytesIO

from PIL import Image
from starlette.datastructures import Headers, UploadFile

from app.schemas.journal import JournalCategoryCreate, JournalEntryCreate
from app.services import journal_service


def _make_category(db_session, user_id, name="일상"):
    return journal_service.create_category(db_session, user_id, JournalCategoryCreate(name=name))


def _make_entry(db_session, user_id, category_id, entry_date=None, content="기록"):
    data = JournalEntryCreate(category_id=category_id, entry_date=entry_date or date.today(), content=content)
    return journal_service.create_entry(db_session, user_id, data)


def _png_file():
    buf = BytesIO()
    Image.new("RGB", (400, 300), "green").save(buf, format="PNG")
    buf.seek(0)
    return buf


def test_journal_page_requires_login(client):
    response = client.get("/journal", follow_redirects=False)
    assert response.status_code == 303
    assert response.headers["location"] == "/login"


def test_journal_page_creates_default_category_and_renders(auth_client):
    response = auth_client.get("/journal")
    assert response.status_code == 200
    assert journal_service.DEFAULT_CATEGORY_NAME in response.text


def test_create_entry_via_multipart_form(auth_client, db_session, test_user, tmp_path, monkeypatch):
    monkeypatch.setattr(journal_service.settings, "journal_media_root", str(tmp_path))
    category = _make_category(db_session, test_user.id, name="투자")
    today = date.today()

    response = auth_client.post(
        "/journal/new",
        data={
            "category_id": str(category.id),
            "entry_date": today.isoformat(),
            "title": "첫 기록",
            "content": "오늘의 투자 회고",
            "moods": "happy,tired",
            "tags": "투자, 회고",
        },
        files={"files": ("photo.png", _png_file(), "image/png")},
        follow_redirects=False,
    )
    assert response.status_code == 200
    assert response.headers["hx-redirect"] == f"/journal?year={today.year}&month={today.month}"

    entries = journal_service.list_entries(db_session, test_user.id)
    assert len(entries) == 1
    assert entries[0].title == "첫 기록"
    assert {t.name for t in entries[0].tags} == {"투자", "회고"}
    assert {m.mood.value for m in entries[0].moods} == {"happy", "tired"}
    assert len(entries[0].attachments) == 1


def test_create_entry_rejects_blank_content(auth_client, db_session, test_user):
    category = _make_category(db_session, test_user.id)
    response = auth_client.post(
        "/journal/new",
        data={"category_id": str(category.id), "entry_date": date.today().isoformat(), "content": "   "},
    )
    assert response.status_code == 200
    assert "내용을 입력해주세요" in response.text
    assert journal_service.list_entries(db_session, test_user.id) == []


def test_journal_day_detail_shows_entry(auth_client, db_session, test_user):
    category = _make_category(db_session, test_user.id)
    today = date.today()
    _make_entry(db_session, test_user.id, category.id, entry_date=today, content="오늘의 기록")

    response = auth_client.get(f"/journal/day/{today.isoformat()}")
    assert response.status_code == 200
    assert "오늘의 기록" in response.text


def test_journal_day_detail_requires_login(client):
    response = client.get(f"/journal/day/{date.today().isoformat()}", follow_redirects=False)
    assert response.status_code == 303
    assert response.headers["location"] == "/login"


def test_edit_entry_updates_content(auth_client, db_session, test_user):
    category = _make_category(db_session, test_user.id)
    entry = _make_entry(db_session, test_user.id, category.id, content="원래 내용")

    response = auth_client.post(
        f"/journal/{entry.id}/edit",
        data={
            "category_id": str(category.id),
            "entry_date": entry.entry_date.isoformat(),
            "content": "수정된 내용",
            "tags": "",
        },
    )
    assert response.status_code == 200
    assert "수정된 내용" in response.text

    db_session.refresh(entry)
    assert entry.content == "수정된 내용"


def test_edit_entry_blank_content_keeps_form_open_with_error(auth_client, db_session, test_user):
    category = _make_category(db_session, test_user.id)
    entry = _make_entry(db_session, test_user.id, category.id, content="원래 내용")

    response = auth_client.post(
        f"/journal/{entry.id}/edit",
        data={"category_id": str(category.id), "entry_date": entry.entry_date.isoformat(), "content": "  "},
    )
    assert response.status_code == 200
    assert "내용을 입력해주세요" in response.text

    db_session.refresh(entry)
    assert entry.content == "원래 내용"


def test_edit_other_users_entry_returns_404(auth_client, db_session, other_user):
    category = _make_category(db_session, other_user.id)
    entry = _make_entry(db_session, other_user.id, category.id)

    response = auth_client.post(
        f"/journal/{entry.id}/edit",
        data={"category_id": str(category.id), "entry_date": entry.entry_date.isoformat(), "content": "해킹 시도"},
    )
    assert response.status_code == 404


def test_delete_entry_removes_it(auth_client, db_session, test_user):
    category = _make_category(db_session, test_user.id)
    entry = _make_entry(db_session, test_user.id, category.id, content="지울 기록")

    response = auth_client.post(f"/journal/{entry.id}/delete")
    assert response.status_code == 200
    assert "지울 기록" not in response.text
    assert journal_service.get_entry(db_session, entry.id, test_user.id) is None


def test_delete_other_users_entry_returns_404(auth_client, db_session, other_user):
    category = _make_category(db_session, other_user.id)
    entry = _make_entry(db_session, other_user.id, category.id)

    response = auth_client.post(f"/journal/{entry.id}/delete")
    assert response.status_code == 404
    assert journal_service.get_entry(db_session, entry.id, other_user.id) is not None


def test_delete_attachment_removes_it(auth_client, db_session, test_user, tmp_path, monkeypatch):
    monkeypatch.setattr(journal_service.settings, "journal_media_root", str(tmp_path))
    category = _make_category(db_session, test_user.id)
    entry = _make_entry(db_session, test_user.id, category.id)
    upload = UploadFile(file=_png_file(), filename="a.png", headers=Headers({"content-type": "image/png"}))
    attachment = journal_service.save_attachment(db_session, entry, upload)

    response = auth_client.post(f"/journal/{entry.id}/attachments/{attachment.id}/delete")
    assert response.status_code == 200
    assert journal_service.get_attachment(db_session, attachment.id, test_user.id) is None


def test_create_category_and_reject_duplicate(auth_client):
    response = auth_client.post("/journal/categories/new", data={"name": "투자"}, follow_redirects=False)
    assert response.status_code == 200
    assert response.headers["hx-redirect"] == "/journal?tab=manage"

    dup_response = auth_client.post("/journal/categories/new", data={"name": "투자"})
    assert dup_response.status_code == 200
    assert "이미 같은 이름" in dup_response.text


def test_journal_page_manage_tab_shows_delete_button_for_categories(auth_client, db_session, test_user):
    _make_category(db_session, test_user.id, name="투자")

    response = auth_client.get("/journal?tab=manage")
    assert response.status_code == 200
    assert "/journal/categories/" in response.text
    assert "/delete" in response.text


def test_journal_page_default_tab_hides_category_management(auth_client, db_session, test_user):
    _make_category(db_session, test_user.id, name="투자")

    response = auth_client.get("/journal")
    assert response.status_code == 200
    assert "/journal/categories/" not in response.text


def test_delete_category_removes_it_and_its_entries(auth_client, db_session, test_user):
    category = _make_category(db_session, test_user.id, name="지울 카테고리")
    entry = _make_entry(db_session, test_user.id, category.id, content="딸려서 지워질 기록")

    response = auth_client.post(f"/journal/categories/{category.id}/delete", follow_redirects=False)
    assert response.status_code == 200
    assert response.headers["hx-redirect"] == "/journal?tab=manage"

    assert journal_service.get_category(db_session, category.id, test_user.id) is None
    assert journal_service.get_entry(db_session, entry.id, test_user.id) is None


def test_delete_other_users_category_returns_404(auth_client, db_session, other_user):
    category = _make_category(db_session, other_user.id, name="남의 카테고리")

    response = auth_client.post(f"/journal/categories/{category.id}/delete")
    assert response.status_code == 404
    assert journal_service.get_category(db_session, category.id, other_user.id) is not None


def test_edit_category_updates_name_and_color(auth_client, db_session, test_user):
    category = _make_category(db_session, test_user.id, name="원래 이름")

    response = auth_client.post(
        f"/journal/categories/{category.id}/edit",
        data={"name": "바뀐 이름", "color": "#123456"},
        follow_redirects=False,
    )
    assert response.status_code == 200
    assert response.headers["hx-redirect"] == "/journal?tab=manage"

    db_session.refresh(category)
    assert category.name == "바뀐 이름"
    assert category.color == "#123456"


def test_edit_category_rejects_duplicate_name(auth_client, db_session, test_user):
    _make_category(db_session, test_user.id, name="투자")
    category = _make_category(db_session, test_user.id, name="일기")

    response = auth_client.post(f"/journal/categories/{category.id}/edit", data={"name": "투자"})
    assert response.status_code == 200
    assert "이미 같은 이름" in response.text


def test_edit_other_users_category_returns_404(auth_client, db_session, other_user):
    category = _make_category(db_session, other_user.id, name="남의 카테고리")

    response = auth_client.post(f"/journal/categories/{category.id}/edit", data={"name": "가로채기"})
    assert response.status_code == 404


def test_manage_tab_shows_entry_count_per_category(auth_client, db_session, test_user):
    category = _make_category(db_session, test_user.id, name="투자")
    _make_entry(db_session, test_user.id, category.id, content="1")
    _make_entry(db_session, test_user.id, category.id, content="2")

    response = auth_client.get("/journal?tab=manage")
    assert "기록 2개" in response.text