"""Dashboard lifecycle contract tests using Streamlit AppTest when available.

All data is synthetic; renders must not mutate/create state or databases.  This
suite deliberately asserts the Issue 15 lifecycle UI is present before it exists.
"""
from __future__ import annotations

from pathlib import Path

import pytest


VIEW = Path(__file__).parents[1] / "dashboard" / "page_views" / "settlement_drafts.py"


def _app_wrapper(tmp_path: Path) -> Path:
    wrapper = tmp_path / "settlement_panel_app.py"
    wrapper.write_text(
        "import os\nfrom dashboard.page_views.settlement_drafts import render_settlement_drafts\n"
        "render_settlement_drafts(db_path=os.environ.get(\"JARCA_LEDGER_DB_PATH\"))\n",
        encoding="utf-8",
    )
    return wrapper


def test_reusable_settlement_draft_panel_exists_and_is_importable(tmp_path):
    assert VIEW.is_file(), "shared Dashboard settlement draft panel is missing"
    from streamlit.testing.v1 import AppTest
    app = AppTest.from_file(str(_app_wrapper(tmp_path))).run()
    assert not app.exception


def test_monthly_and_assets_pages_invoke_shared_panel():
    root = VIEW.parents[1]
    pages = [p for p in root.rglob("*.py") if p.name in ("monthly_settlement.py", "assets.py")]
    assert len(pages) == 2
    for page in pages:
        assert "render_settlement_drafts" in page.read_text(encoding="utf-8")


def test_streamlit_panel_renders_lifecycle_without_writing_or_creating_db(monkeypatch, tmp_path):
    pytest.importorskip("streamlit.testing.v1")
    from streamlit.testing.v1 import AppTest
    db_path = tmp_path / "dashboard-missing.sqlite3"
    # Explicit synthetic DB path and no authenticated actor: render only.
    monkeypatch.setenv("JARCA_LEDGER_DB_PATH", str(db_path))
    app = AppTest.from_file(str(_app_wrapper(tmp_path))).run()
    assert not app.exception
    page = "\n".join([e.value for e in app.markdown] + [e.value for e in app.caption] + [e.value for e in app.info] + [e.label for e in app.button])
    for expected in ("초안", "검토", "승인", "최종", "취소", "정정", "평가자료", "제외 사유"):
        assert expected in page
    assert not db_path.exists(), "render-only Dashboard created a database"


def test_panel_actions_are_explicit_and_selection_state_bound_to_draft_version():
    source = VIEW.read_text(encoding="utf-8")
    for action in ("create_settlement_draft", "update_settlement_draft", "cancel_settlement_draft",
                   "refresh_settlement_draft_targets", "set_settlement_draft_item", "review_settlement_draft",
                   "approve_settlement_draft", "finalize_settlement_draft", "register_account_valuation",
                   "list_account_valuations", "correct_account_valuation"):
        assert action in source, f"missing explicit action {action}"
    assert "session_state" in source
    assert "review_fingerprint" in source
    assert "expected_version" in source or "version, actor" in source
    assert "transaction" in source.lower() and "거래" in source


def test_closed_draft_view_exposes_immutable_evidence_and_correction_creation():
    source = VIEW.read_text(encoding="utf-8")
    for immutable in ("draft_version", "review_fingerprint", "final_run_id", "correction_of_run_id",
                      "basis_date", "created_by", "created_at", "updated_at", "memo"):
        assert immutable in source, f"closed view omits {immutable}"
    assert "correction_reason" in source
    assert "completion" in source or "completed" in source


def test_render_path_contains_no_implicit_lifecycle_mutations():
    source = VIEW.read_text(encoding="utf-8")
    # All lifecycle mutations must be behind explicit submit/button branches;
    # import/render must never invoke them unconditionally.
    assert "if st.button" in source or "form_submit_button" in source
    assert "render_settlement_drafts" in source


def test_app_test_create_review_approve_finalize_roundtrip(tmp_path, monkeypatch):
    from streamlit.testing.v1 import AppTest
    from jarca_ledger_mcp.db import init_db
    from jarca_ledger_mcp.application.assets_service import create_manual_asset
    db_path = tmp_path / "lifecycle.sqlite3"
    init_db(str(db_path))
    seeded = create_manual_asset("Synthetic asset", 125, "2026-09-30", "other", source_note="fixture", db_path=str(db_path))
    assert seeded.get("success"), seeded
    monkeypatch.setenv("JARCA_LEDGER_DB_PATH", str(db_path))
    app = AppTest.from_file(str(_app_wrapper(tmp_path))).run()
    assert not app.exception
    app.button[0].click().run()
    assert not app.exception
    assert app.button[0].label == "초안 생성 / 정정 초안"
    assert len(app.selectbox[0].options) == 1
    assert "active" in " ".join(item.value for item in app.caption)
    # Exercise read-only review through the rendered explicit button.
    review = next(button for button in app.button if button.label == "검토 / 새로고침 대상")
    review.click().run(timeout=10)
    assert not app.exception
    assert any("review_fingerprint" in item.value for item in app.caption)
    assert not app.exception