//! `mapobjects_store` — H3-indexed on-device map of detected objects.
//!
//! Real implementation lands in:
//! - AZ-665 `mapobjects_store_h3_classify`
//! - AZ-666 `mapobjects_store_ignored_and_pass_sweep`
//! - AZ-667 `mapobjects_store_hydrate_and_pending`
//! - AZ-668 `mapobjects_store_persistence`

use serde::{Deserialize, Serialize};

use shared::error::{AutopilotError, Result};
use shared::health::ComponentHealth;
use shared::models::detection::Detection;
use shared::models::mapobject::MapObjectsBundle;
use shared::models::poi::Poi;

const NAME: &str = "mapobjects_store";

#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
#[serde(rename_all = "SCREAMING_SNAKE_CASE")]
pub enum Classification {
    New,
    Moved,
    Existing,
    RemovedCandidate,
    Ignored,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
#[serde(rename_all = "snake_case")]
pub enum SyncState {
    /// Bundle pulled centrally and applied.
    Hydrated,
    /// Local-observed records exist but have not been pushed.
    Pending,
    /// Push acknowledged centrally.
    PushedOk,
    /// Push failed; will retry from `pending_pushes/`.
    PushDeferred,
}

pub struct MapObjectsStore;

impl MapObjectsStore {
    pub fn new() -> Self {
        Self
    }

    pub fn handle(&self) -> MapObjectsStoreHandle {
        MapObjectsStoreHandle
    }
}

impl Default for MapObjectsStore {
    fn default() -> Self {
        Self::new()
    }
}

#[derive(Clone, Copy)]
pub struct MapObjectsStoreHandle;

impl MapObjectsStoreHandle {
    pub async fn classify(&self, _detection: Detection) -> Result<Classification> {
        Err(AutopilotError::NotImplemented(
            "mapobjects_store::classify (AZ-665)",
        ))
    }

    pub async fn apply_decline(&self, _poi: Poi) -> Result<()> {
        Err(AutopilotError::NotImplemented(
            "mapobjects_store::apply_decline (AZ-666)",
        ))
    }

    pub async fn dump_pending(&self) -> Result<MapObjectsBundle> {
        Err(AutopilotError::NotImplemented(
            "mapobjects_store::dump_pending (AZ-667)",
        ))
    }

    pub async fn hydrate(&self, _bundle: MapObjectsBundle) -> Result<()> {
        Err(AutopilotError::NotImplemented(
            "mapobjects_store::hydrate (AZ-667)",
        ))
    }

    pub async fn set_sync_state(&self, _state: SyncState) -> Result<()> {
        Err(AutopilotError::NotImplemented(
            "mapobjects_store::set_sync_state (AZ-667)",
        ))
    }

    pub fn health(&self) -> ComponentHealth {
        ComponentHealth::disabled(NAME)
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn it_compiles() {
        let h = MapObjectsStore::new().handle();
        assert_eq!(h.health().level, shared::health::HealthLevel::Disabled);
    }
}
