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package com.itangcent.intellij.extend.guice

import com.google.inject.ConfigurationException
import com.google.inject.Injector
import com.google.inject.ProvisionException
import com.google.inject.Singleton
import com.google.inject.binder.LinkedBindingBuilder
import com.google.inject.binder.ScopedBindingBuilder
import kotlin.reflect.KClass

/**
 * Returns the appropriate instance for the given injection type; equivalent to {@code
 * getProvider(type).get()}. When feasible, avoid using this method, in favor of having Guice
 * inject your dependencies ahead of time.
 *
 * @throws ConfigurationException if this injector cannot find or create the provider.
 * @throws ProvisionException if there was a runtime failure while providing an instance.
 */
fun  Injector.instance(kClass: KClass): T {
    return this.getInstance(kClass.java)
}

/**
 * See the EDSL examples at [com.google.inject.Binder].
 *
 * @see com.google.inject.binder.ScopedBindingBuilder#in
 */
fun ScopedBindingBuilder.at(scopeAnnotation: KClass) {
    return this.`in`(scopeAnnotation.java)
}

/**
 * wrap [`in`(Singleton::class.java)]
 *
 * @see com.google.inject.binder.ScopedBindingBuilder#in
 */
fun ScopedBindingBuilder.singleton() {
    return this.`in`(Singleton::class.java)
}

/** See the EDSL examples at [com.google.inject.Binder].  */
fun  LinkedBindingBuilder.with(implementation: KClass): ScopedBindingBuilder {
    return this.to(implementation.java)
}

/** See the EDSL examples at [com.google.inject.Binder].  */
@Suppress("UNCHECKED_CAST")
fun  LinkedBindingBuilder.withUnsafe(implementation: KClass<*>): ScopedBindingBuilder {
    return this.to(implementation.java as Class)
}

/**
 * #todo:provider暂时无法完成PostConstruct
 */
inline fun  LinkedBindingBuilder.withProvider(noinline provider: () -> TE): ScopedBindingBuilder {
    return this.toProvider(com.google.inject.Provider { provider() })
}