import { isObject } from "./isObject"
import { normalizeKeyPath } from "./normalizeKeyPath"

/**
 * 根据键名路径给对象赋值，成功返回 true
 * 当设置 overwrite = true 时当路径不存在或路径中存在不可赋值项时自动创建对象
 *
 * @param object 对象
 * @param path 键名路径
 * @param value 值
 * @param overwrite 覆盖，当路径不存在或路径中存在不可赋值项时自动创建对象
 *
 * @example
 * let obj = {a:{b:1}}
 * setObjectValue(a,"a.b",3) // obj => {a:{b:3}}
 * setObjectValue(a,"a.b.d.e",5, true) // obj => {a:{b:{c:{d:5}}}}
 * @return {any}
 */
export function setObjectValue(object: object, path: string | string[], value: any, overwrite = false) {
    let keyPath = normalizeKeyPath(path)
    let cursor: any = object

    // keyPath 为空数组直接返回 false
    if (keyPath.length <= 0) return false

    for (let i = 0, len = keyPath.length; i < len; i++) {
        let key = keyPath[i]

        // 最后一个key
        if (i == len - 1) {
            cursor[key] = value
            return true
        } else {
            // 路径不存在的情况
            if (!isObject(cursor[key])) {
                if (overwrite) {
                    cursor[key] = {}
                } else {
                    return false
                }
            }
            cursor = cursor[key]
        }
    }

    return false
}