"""SLICE-4 — git-aware sidecar read/write helpers.

Uses the FakeGitea from the propose-vertical fixtures (no network).
"""
from __future__ import annotations

import asyncio

import yaml

from app import gitea as gitea_mod, metadata
from app.config import load_config

from test_propose_vertical import app_with_fake_gitea, tmp_env  # noqa: F401

LEGACY = """---
slug: alpha
title: Alpha
state: active
owners:
- ben.stull
tags:
- one
priority: P1
---

Alpha body.
"""

MIGRATED_MD = "Alpha body.\n"
MIGRATED_SIDECAR = """slug: alpha
title: Alpha
state: active
owners:
- ben.stull
tags:
- one
priority: P1
"""


def _gitea():
    return gitea_mod.Gitea(load_config())


def test_read_entry_from_git_legacy(app_with_fake_gitea):
    _app, fake = app_with_fake_gitea
    fake.files[("wiggleverse", "meta", "main", "rfcs/alpha.md")] = {
        "content": LEGACY, "sha": "s1"}
    st = asyncio.run(metadata.read_entry_from_git(
        _gitea(), "wiggleverse", "meta", "rfcs/alpha.md"))
    assert st is not None
    assert st.entry.slug == "alpha"
    assert st.entry.extra["priority"] == "P1"
    assert st.sidecar_sha is None          # no sidecar yet
    assert st.malformed is False


def test_read_entry_from_git_migrated(app_with_fake_gitea):
    _app, fake = app_with_fake_gitea
    fake.files[("wiggleverse", "meta", "main", "rfcs/alpha.md")] = {
        "content": MIGRATED_MD, "sha": "s1"}
    fake.files[("wiggleverse", "meta", "main", "rfcs/alpha.meta.yaml")] = {
        "content": MIGRATED_SIDECAR, "sha": "s2"}
    st = asyncio.run(metadata.read_entry_from_git(
        _gitea(), "wiggleverse", "meta", "rfcs/alpha.md"))
    assert st.entry.extra["priority"] == "P1"   # from sidecar
    assert st.entry.body == "Alpha body.\n"
    assert st.sidecar_sha == "s2"


def test_read_entry_from_git_missing(app_with_fake_gitea):
    st = asyncio.run(metadata.read_entry_from_git(
        _gitea(), "wiggleverse", "meta", "rfcs/nope.md"))
    assert st is None


def test_write_entry_files_lazy_migrates_legacy(app_with_fake_gitea):
    _app, fake = app_with_fake_gitea
    fake.files[("wiggleverse", "meta", "main", "rfcs/alpha.md")] = {
        "content": LEGACY, "sha": "s1"}
    st = asyncio.run(metadata.read_entry_from_git(
        _gitea(), "wiggleverse", "meta", "rfcs/alpha.md"))
    e2 = metadata.apply_values(st.entry, {"priority": "P0"})
    ops = metadata.write_entry_files("rfcs/alpha.md", e2, st)
    paths = {o["path"]: o for o in ops}
    # sidecar created, .md rewritten body-only
    assert "rfcs/alpha.meta.yaml" in paths
    assert paths["rfcs/alpha.meta.yaml"]["operation"] == "create"
    assert paths["rfcs/alpha.md"]["operation"] == "update"
    assert "---" not in paths["rfcs/alpha.md"]["content"]   # INV-2 clean body
    assert yaml.safe_load(paths["rfcs/alpha.meta.yaml"]["content"])["priority"] == "P0"


def test_write_entry_files_already_migrated_touches_sidecar_only(app_with_fake_gitea):
    _app, fake = app_with_fake_gitea
    fake.files[("wiggleverse", "meta", "main", "rfcs/alpha.md")] = {
        "content": MIGRATED_MD, "sha": "s1"}
    fake.files[("wiggleverse", "meta", "main", "rfcs/alpha.meta.yaml")] = {
        "content": MIGRATED_SIDECAR, "sha": "s2"}
    st = asyncio.run(metadata.read_entry_from_git(
        _gitea(), "wiggleverse", "meta", "rfcs/alpha.md"))
    e2 = metadata.apply_values(st.entry, {"priority": "P0"})
    ops = metadata.write_entry_files("rfcs/alpha.md", e2, st)
    paths = {o["path"]: o for o in ops}
    assert set(paths) == {"rfcs/alpha.meta.yaml"}          # .md untouched
    assert paths["rfcs/alpha.meta.yaml"]["operation"] == "update"
    assert paths["rfcs/alpha.meta.yaml"]["sha"] == "s2"