# retoor <retoor@molodetz.nl>

import os
import tempfile
from pathlib import Path

from devplacepy.services.backup import store


def _make_backup(target, *, offloaded, missing_local=False, schedule_uid=""):
    job_uid = f"job-{store.generate_uid()}"
    uid = store.create_backup(
        target=target, created_by="test", job_uid=job_uid, schedule_uid=schedule_uid
    )
    path = Path(tempfile.gettempdir()) / f"backup-store-test-{uid}.tar.gz"
    if not missing_local:
        path.write_bytes(b"x" * 10)
    store.finalize_backup(
        uid,
        filename=path.name,
        local_path=str(path),
        stats={"bytes_out": 10, "bytes_in": 10, "file_count": 1, "dir_count": 0, "sha256": "abc"},
    )
    if offloaded:
        store.mark_remote_uploaded(uid, f"remote:{target}/{path.name}")
    return uid, path


def test_prune_orphans_spares_offloaded_backups_with_purged_local_copies(local_db):
    offloaded_uid, _ = _make_backup("database", offloaded=True)
    store.mark_local_purged(offloaded_uid)
    orphan_uid, _ = _make_backup("database", offloaded=False, missing_local=True)

    try:
        removed = store.prune_orphans()

        remaining = {row["uid"] for row in store.list_backups(limit=1000)}
        assert offloaded_uid in remaining
        assert orphan_uid not in remaining
        assert removed >= 1
    finally:
        store.delete_backup(offloaded_uid)


def test_rotate_schedule_never_removes_a_backup_without_a_confirmed_remote_copy(local_db):
    schedule_uid = store.create_schedule(
        name="test-rotate",
        target="database",
        kind="interval",
        every_seconds=86400,
        cron="",
        keep_last=1,
        created_by="test",
        next_run_at="2026-01-01T00:00:00",
    )
    older_uid, _ = _make_backup("database", offloaded=False, schedule_uid=schedule_uid)
    newer_uid, _ = _make_backup("database", offloaded=True, schedule_uid=schedule_uid)

    try:
        removed = store.rotate_schedule(schedule_uid, keep_last=1)

        remaining = {row["uid"] for row in store.list_backups(limit=1000)}
        assert removed == 0
        assert older_uid in remaining
        assert newer_uid in remaining
    finally:
        store.delete_backup(older_uid)
        store.delete_backup(newer_uid)


def _point_storage_at(monkeypatch, root: Path):
    uploads = root / "uploads"
    attachments = uploads / "attachments"
    project_files = uploads / "project_files"
    keys = root / "keys"
    zips = root / "zips"
    deepsearch = root / "deepsearch"
    workspaces = root / "container_workspaces"
    backups = root / "backups"
    for path in (
        attachments,
        project_files,
        keys,
        zips,
        deepsearch,
        workspaces,
        backups,
    ):
        path.mkdir(parents=True, exist_ok=True)
    db_file = root / "devplace.db"
    db_file.write_bytes(b"db")
    tasks = root / "devii_tasks.db"
    tasks.write_bytes(b"t")
    lessons = root / "devii_lessons.db"
    lessons.write_bytes(b"l")
    (project_files / "a.bin").write_bytes(b"x" * 10)
    (attachments / "b.bin").write_bytes(b"y" * 5)
    monkeypatch.setattr(store.config, "DATA_DIR", root)
    monkeypatch.setattr(store.config, "UPLOADS_DIR", uploads)
    monkeypatch.setattr(store.config, "ATTACHMENTS_DIR", attachments)
    monkeypatch.setattr(store.config, "PROJECT_FILES_DIR", project_files)
    monkeypatch.setattr(store.config, "KEYS_DIR", keys)
    monkeypatch.setattr(store.config, "ZIPS_DIR", zips)
    monkeypatch.setattr(store.config, "DEEPSEARCH_DIR", deepsearch)
    monkeypatch.setattr(store.config, "CONTAINER_WORKSPACES_DIR", workspaces)
    monkeypatch.setattr(store.config, "BACKUPS_DIR", backups)
    monkeypatch.setattr(store.config, "DEVII_TASKS_DB", tasks)
    monkeypatch.setattr(store.config, "DEVII_LESSONS_DB", lessons)
    monkeypatch.setattr(store.config, "DATABASE_URL", f"sqlite:///{db_file}")
    store.clear_storage_stats_cache()
    return {
        "uploads": uploads,
        "attachments": attachments,
        "project_files": project_files,
        "db_file": db_file,
    }


def test_disk_usage_does_not_walk(monkeypatch, tmp_path):
    monkeypatch.setattr(store.config, "DATA_DIR", tmp_path)
    store.clear_storage_stats_cache()

    def boom(*_args, **_kwargs):
        raise AssertionError("disk_usage must not walk the data tree")

    monkeypatch.setattr(store.os, "walk", boom)
    disk = store.disk_usage()
    assert disk["total_bytes"] > 0
    assert "used_percent" in disk


def test_compute_storage_stats_walks_data_dir_once(local_db, monkeypatch, tmp_path):
    root = tmp_path / "data"
    _point_storage_at(monkeypatch, root)
    walks = []
    real_walk = os.walk

    def counting_walk(path, *args, **kwargs):
        walks.append(os.path.realpath(path))
        return real_walk(path, *args, **kwargs)

    monkeypatch.setattr(store.os, "walk", counting_walk)
    stats = store.compute_storage_stats()
    assert walks == [os.path.realpath(root)]
    by_key = {row["key"]: row for row in stats["paths"]}
    assert by_key["project_files"]["file_count"] == 1
    assert by_key["project_files"]["size_bytes"] == 10
    assert by_key["attachments"]["file_count"] == 1
    assert by_key["uploads"]["file_count"] >= 2
    assert by_key["database"]["file_count"] == 1
    assert stats["data_dir"]["file_count"] >= 3
    walks.clear()
    again = store.compute_storage_stats()
    assert walks == []
    assert again["data_dir"]["file_count"] == stats["data_dir"]["file_count"]