//
//  Copyright (c) 2023 Touch Instinct
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the Software), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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//

open class BaseSingleValueStorage<ValueType, StorageType>: SingleValueStorage {
    public typealias HasValueClosure = (StorageType, StorageKey<ValueType>) -> Result<Bool, StorageError>
    public typealias GetValueClosure = (StorageType, StorageKey<ValueType>) -> Result<ValueType, StorageError>
    public typealias StoreValueClosure = (StorageType, ValueType, StorageKey<ValueType>) -> Result<Void, StorageError>
    public typealias DeleteValueClosure = (StorageType, StorageKey<ValueType>) -> Result<Void, StorageError>

    public let storage: StorageType
    public let storageKey: StorageKey<ValueType>
    public let hasValueClosure: HasValueClosure
    public let deleteValueClosure: DeleteValueClosure
    public let getValueClosure: GetValueClosure
    public let storeValueClosure: StoreValueClosure

    public init(storage: StorageType,
                storageKey: StorageKey<ValueType>,
                hasValueClosure: @escaping HasValueClosure,
                deleteValueClosure: @escaping DeleteValueClosure,
                getValueClosure: @escaping GetValueClosure,
                storeValueClosure: @escaping StoreValueClosure) {

        self.storage = storage
        self.storageKey = storageKey
        self.hasValueClosure = hasValueClosure
        self.deleteValueClosure = deleteValueClosure
        self.getValueClosure = getValueClosure
        self.storeValueClosure = storeValueClosure
    }

    // MARK: - SingleValueStorage

    open func hasStoredValue() -> Bool {
        (try? hasValueClosure(storage, storageKey).get()) ?? false
    }

    open func store(value: ValueType) -> Result<Void, StorageError> {
        storeValueClosure(storage, value, storageKey)
    }

    open func getValue() -> Result<ValueType, StorageError> {
        getValueClosure(storage, storageKey)
    }

    open func deleteValue() -> Result<Void, StorageError> {
        deleteValueClosure(storage, storageKey)
    }
}