wedb_embed 0.1.1

use sonic_rs::Value;
use std::borrow::Cow;

/// 数组切片索引
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum SliceIndex {
    Index(isize),
    Slice {
        start: Option<isize>,
        stop: Option<isize>,
        step: Option<isize>,
    },
}

/// JSONPath 过滤操作符
#[derive(Debug, Clone, PartialEq)]
pub enum FilterOp {
    Exists,
    NotExists,
    Eq(Value),
    Ne(Value),
    Lt(f64),
    Le(f64),
    Gt(f64),
    Ge(f64),
}

/// JSONPath 过滤表达式 (如 `@.price < 30`, `@.name == 'Alice'`, `@.active`, `!@.active`)
#[derive(Debug, Clone, PartialEq)]
pub struct FilterExpr<'a> {
    pub path: Vec<Cow<'a, str>>,
    pub op: FilterOp,
}

/// JSONPath 语法片段（基于 Cow<'a, str> 零堆分配借用路径）
#[derive(Debug, Clone, PartialEq)]
pub enum PathSegment<'a> {
    Root,
    Field(Cow<'a, str>),
    MultiField(Vec<Cow<'a, str>>),
    Index(isize),
    MultiIndex(Vec<SliceIndex>),
    Wildcard,
    Filter(FilterExpr<'a>),
    Recursive(Box<PathSegment<'a>>),
}