//! 资产领域模型。
//!
//! 本层只保留资产对象、实体绑定、访问策略、版本和业务归属等纯领域事实。
//! OSS 对象探测、HTTP DTO 映射和 SpacetimeDB row 写入都属于外层 adapter。

use serde::{Deserialize, Serialize};
#[cfg(feature = "spacetime-types")]
use spacetimedb::SpacetimeType;

pub const ASSET_OBJECT_ID_PREFIX: &str = "assetobj_";
pub const ASSET_BINDING_ID_PREFIX: &str = "assetbind_";
pub const INITIAL_ASSET_OBJECT_VERSION: u32 = 1;

// 资产对象访问策略先冻结为枚举，避免 reducer、HTTP DTO 和脚本里散落字符串字面量。
#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub enum AssetObjectAccessPolicy {
    Private,
    PublicRead,
}

impl AssetObjectAccessPolicy {
    pub fn as_str(&self) -> &'static str {
        match self {
            Self::Private => "private",
            Self::PublicRead => "public_read",
        }
    }
}

/// SpacetimeDB 写入前的资产对象快照。
#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub struct AssetObjectUpsertSnapshot {
    pub asset_object_id: String,
    pub bucket: String,
    pub object_key: String,
    pub access_policy: AssetObjectAccessPolicy,
    pub content_type: Option<String>,
    pub content_length: u64,
    pub content_hash: Option<String>,
    pub version: u32,
    pub source_job_id: Option<String>,
    pub owner_user_id: Option<String>,
    pub profile_id: Option<String>,
    pub entity_id: Option<String>,
    pub asset_kind: String,
    pub created_at_micros: i64,
    pub updated_at_micros: i64,
}

/// 资产历史列表的领域快照。
#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub struct AssetHistoryEntrySnapshot {
    pub asset_object_id: String,
    pub asset_kind: String,
    pub image_src: String,
    pub owner_user_id: Option<String>,
    pub profile_id: Option<String>,
    pub entity_id: Option<String>,
    pub created_at_micros: i64,
    pub updated_at_micros: i64,
}

/// 业务实体与资产对象的绑定快照。
#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub struct AssetEntityBindingSnapshot {
    pub binding_id: String,
    pub asset_object_id: String,
    pub entity_kind: String,
    pub entity_id: String,
    pub slot: String,
    pub asset_kind: String,
    pub owner_user_id: Option<String>,
    pub profile_id: Option<String>,
    pub created_at_micros: i64,
    pub updated_at_micros: i64,
}

/// 面向 API 与前端展示的资产对象记录。
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct AssetObjectRecord {
    pub asset_object_id: String,
    pub bucket: String,
    pub object_key: String,
    pub access_policy: AssetObjectAccessPolicy,
    pub content_type: Option<String>,
    pub content_length: u64,
    pub content_hash: Option<String>,
    pub version: u32,
    pub source_job_id: Option<String>,
    pub owner_user_id: Option<String>,
    pub profile_id: Option<String>,
    pub entity_id: Option<String>,
    pub asset_kind: String,
    pub created_at: String,
    pub updated_at: String,
}

/// 面向 API 与前端展示的资产历史记录。
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct AssetHistoryEntryRecord {
    pub asset_object_id: String,
    pub asset_kind: String,
    pub image_src: String,
    pub owner_user_id: Option<String>,
    pub profile_id: Option<String>,
    pub entity_id: Option<String>,
    pub created_at: String,
    pub updated_at: String,
}

/// 面向 API 与前端展示的实体绑定记录。
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct AssetEntityBindingRecord {
    pub binding_id: String,
    pub asset_object_id: String,
    pub entity_kind: String,
    pub entity_id: String,
    pub slot: String,
    pub asset_kind: String,
    pub owner_user_id: Option<String>,
    pub profile_id: Option<String>,
    pub created_at: String,
    pub updated_at: String,
}