"""Keep confirmed task heads and locally starred uploads; never retry deletion."""

import json
import time
from datetime import UTC, datetime


class CloudLibrary:
    def __init__(self, service):
        self.service = service
        self.db = service.db
        self.checked = 0.0

    def register(self, device_id, image_id, asset_id, operation_id):
        meta = self.service.assets.info(asset_id)
        self.db.execute(
            "INSERT INTO managed_cloud_uploads VALUES(?,?,?,?,?,?,NULL,NULL)",
            (
                device_id,
                image_id,
                asset_id,
                meta.get("job_id"),
                operation_id,
                datetime.now(UTC).isoformat(),
            ),
        )

    def confirm(self, operation_id):
        self.db.execute(
            "UPDATE managed_cloud_uploads SET confirmed_at=? WHERE operation_id=?",
            (datetime.now(UTC).isoformat(), operation_id),
        )
        self.checked = 0.0

    def retained(self, row):
        meta = self.db.one(
            "SELECT starred FROM asset_metadata WHERE asset_id=?", (row["asset_id"],)
        )
        if meta and meta["starred"]:
            head = self.db.one(
                "SELECT image_id FROM managed_cloud_uploads WHERE device_id=? AND asset_id=? AND confirmed_at IS NOT NULL ORDER BY uploaded_at DESC,image_id DESC LIMIT 1",
                (row["device_id"], row["asset_id"]),
            )
            if not head or head["image_id"] == row["image_id"]:
                return True
        if row["job_id"]:
            head = self.db.one(
                "SELECT image_id FROM managed_cloud_uploads WHERE device_id=? AND job_id=? AND confirmed_at IS NOT NULL ORDER BY uploaded_at DESC,image_id DESC LIMIT 1",
                (row["device_id"], row["job_id"]),
            )
            if head and head["image_id"] == row["image_id"]:
                return True
        return False

    def eligible(self, device_id, image_id):
        row = self.db.one(
            "SELECT * FROM managed_cloud_uploads WHERE device_id=? AND image_id=?",
            (device_id, image_id),
        )
        if not row or self.retained(row):
            return False
        # A confirmed replacement is mandatory; failed/unknown uploads cannot
        # evict the last known usable cloud image.
        newer = self.db.one(
            "SELECT image_id FROM managed_cloud_uploads WHERE device_id=? AND confirmed_at IS NOT NULL AND uploaded_at>? LIMIT 1",
            (device_id, row["uploaded_at"]),
        )
        if not newer:
            return False
        state = self.service.state(device_id)
        if state["base_image_id"] == image_id:
            return False
        if self.db.one(
            "SELECT id FROM overrides WHERE device_id=? AND image_id=?",
            (device_id, image_id),
        ):
            return False
        for r in self.db.all(
            "SELECT payload FROM playlists UNION ALL SELECT payload FROM jobs"
        ):
            data = json.loads(r["payload"])
            if data.get("device_id") == device_id and (
                image_id in data.get("image_ids", [])
                or data.get("source", {}).get("image_id") == image_id
            ):
                return False
        return True

    def sweep(self):
        if time.monotonic() - self.checked < 60:
            return
        self.checked = time.monotonic()
        with self.service.lock:
            if (
                not self.service.settings.mock
                and not self.service.settings.write_enabled
            ):
                return
            for row in self.db.all(
                "SELECT * FROM managed_cloud_uploads WHERE cleanup_operation IS NULL ORDER BY uploaded_at"
            ):
                device_id, image_id = row["device_id"], row["image_id"]
                if self.service.blocked(device_id) or not self.eligible(
                    device_id, image_id
                ):
                    continue
                device = self.service.registry.get(device_id).device(refresh=True)
                if (
                    device.status != "online"
                    or not device.current_content.synced
                    or device.current_content.id == image_id
                ):
                    continue
                id = self.service.submit(
                    "delete",
                    {
                        "image_id": image_id,
                        "confirm_current": False,
                        "cloud_cleanup": True,
                    },
                    device_id,
                    "cloud-library",
                    "cloud-cleanup-" + row["operation_id"],
                    "cloud-cleanup-"
                    + row["operation_id"]
                    + "-"
                    + datetime.now(UTC).strftime("%Y%m%d%H%M"),
                )
                self.db.execute(
                    "UPDATE managed_cloud_uploads SET cleanup_operation=? WHERE device_id=? AND image_id=?",
                    (id, device_id, image_id),
                )