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package ai.platon.pulsar.skeleton.context
import ai.platon.pulsar.common.CheckState
import ai.platon.pulsar.common.collect.UrlPool
import ai.platon.pulsar.common.config.ImmutableConfig
import ai.platon.pulsar.common.urls.UrlAware
import ai.platon.pulsar.dom.FeaturedDocument
import ai.platon.pulsar.external.ModelResponse
import ai.platon.pulsar.persist.WebPage
import ai.platon.pulsar.persist.gora.generated.GWebPage
import ai.platon.pulsar.skeleton.common.options.LoadOptions
import ai.platon.pulsar.skeleton.common.urls.NormURL
import ai.platon.pulsar.skeleton.crawl.CrawlLoops
import ai.platon.pulsar.skeleton.crawl.common.GlobalCache
import ai.platon.pulsar.skeleton.crawl.filter.ChainedUrlNormalizer
import ai.platon.pulsar.skeleton.session.PulsarSession
import com.google.common.annotations.Beta
import org.springframework.beans.BeansException
import java.net.URL
import java.nio.ByteBuffer
import java.util.concurrent.CompletableFuture
import kotlin.reflect.KClass
/**
* [PulsarContext] consists of a set of highly customizable components that provide
* the core set of interfaces of the system and is used to create [PulsarSession].
*/
interface PulsarContext: AutoCloseable {
/**
* The context id
* */
val id: Int
/**
* Flag that indicates whether this context is currently active.
* */
val isActive: Boolean
/**
* An immutable config loaded from the config file at startup, and never changes
* */
val unmodifiedConfig: ImmutableConfig
/**
* The url normalizer
* */
val urlNormalizer: ChainedUrlNormalizer
/**
* The global cache
* */
val globalCache: GlobalCache
/**
* The url pool to fetch
* */
val crawlPool: UrlPool
/**
* The main loops
* */
val crawlLoops: CrawlLoops
/**
* Get a bean with the specified class, throws [BeansException] if the bean doesn't exist
* */
@Throws(BeansException::class)
fun getBean(requiredType: KClass): T
/**
* Get a bean with the specified class, returns null if the bean doesn't exist
* */
fun getBeanOrNull(requiredType: KClass): T?
/**
* Create a pulsar session
* */
fun createSession(): PulsarSession
/**
* Close a pulsar session
* */
fun closeSession(session: PulsarSession)
/**
* Register closable objects, the objects will be closed when the context closes.
* It's safe to register the same object multiple times, the object will be closed only once.
*
* @param closable The object to close
* @param priority The priority of the object, the higher the priority, the earlier the object is closed
* */
fun registerClosable(closable: AutoCloseable, priority: Int = 0)
/**
* Normalize an url, the url can be in one of the following forms:
* 1. a normal url
* 2. a configured url
* 3. a base64 encoded url
* 4. a base64 encoded configured url
*
* An url can be configured by appending arguments to the url, and it also can be used with a LoadOptions,
* If both tailing arguments and LoadOptions are present, the LoadOptions overrides the tailing arguments,
* but default values in LoadOptions are ignored.
*
* @param url The url to normalize
* @param options The LoadOptions applied to the url
* @param toItemOption If the LoadOptions is converted to item load options
* @return The normalized url or NIL if the input url is invalid
* */
fun normalize(url: String, options: LoadOptions, toItemOption: Boolean = false): NormURL
/**
* Normalize an url, the url can be in one of the following forms:
* 1. a normal url
* 2. a configured url
* 3. a base64 encoded url
* 4. a base64 encoded configured url
*
* An url can be configured by appending arguments to the url, and it also can be used with a LoadOptions,
* If both tailing arguments and LoadOptions are present, the LoadOptions overrides the tailing arguments,
* but default values in LoadOptions are ignored.
*
* @param url The url to normalize
* @param options The LoadOptions applied to the url
* @param toItemOption If the LoadOptions is converted to item load options
* @return The normalized url or null if the input url is invalid
* */
fun normalizeOrNull(url: String?, options: LoadOptions, toItemOption: Boolean = false): NormURL?
/**
* Normalize urls, remove invalid ones
*
* @param urls The urls to normalize
* @param options The LoadOptions applied to each url
* @param toItemOption If the LoadOptions is converted to item load options
* @return All normalized urls, all invalid input urls are removed
* */
fun normalize(urls: Iterable, options: LoadOptions, toItemOption: Boolean = false): List
/**
* Normalize an url.
*
* If both url arguments and LoadOptions are present, the LoadOptions overrides the tailing arguments,
* but default values in LoadOptions are ignored.
*
* @param url The url to normalize
* @param options The LoadOptions applied to the url
* @param toItemOption If the LoadOptions is converted to item load options
* @return The normalized url or NIL if the input url is invalid
* */
fun normalize(url: UrlAware, options: LoadOptions, toItemOption: Boolean = false): NormURL
/**
* Normalize an url, the url can be in one of the following forms:
* 1. a normal url
* 2. a configured url
* 3. a base64 encoded url
* 4. a base64 encoded configured url
*
* An url can be configured by appending arguments to the url, and it also can be used with a LoadOptions,
* If both tailing arguments and LoadOptions are present, the LoadOptions overrides the tailing arguments,
* but default values in LoadOptions are ignored.
*
* @param url The url to normalize
* @param options The LoadOptions applied to the url
* @param toItemOption If the LoadOptions is converted to item load options
* @return The normalized url or null if the input url is invalid
* */
fun normalizeOrNull(url: UrlAware?, options: LoadOptions, toItemOption: Boolean = false): NormURL?
/**
* Normalize urls, remove invalid ones
*
* @param urls The urls to normalize
* @param options The LoadOptions applied to each url
* @param toItemOption If the LoadOptions is converted to item load options
* @return All normalized urls, all invalid input urls are removed
* */
fun normalize(urls: Collection, options: LoadOptions, toItemOption: Boolean = false): List
/**
* Inject an url
*
* @param url The url followed by config options
* @return The web page created
*/
fun inject(url: String): WebPage
/**
* Inject an url
*
* @param url The url followed by config options
* @return The web page created
*/
fun inject(url: NormURL): WebPage
/**
* Get a webpage from the storage
*
* @param url The url of the page to retrieve
* @return The web page, if the page doesn't exist, a NIL page is return
*/
fun get(url: String): WebPage
/**
* Get a page from storage.
*
* @param url The url
* @param fields The fields to load from local storage
* @return The webpage in storage if exists, otherwise returns a NIL page
*/
fun get(url: String, vararg fields: String): WebPage
/**
* Get a webpage from the storage
*
* @param url The url of the page to retrieve
* @return The web page or null
*/
fun getOrNull(url: String): WebPage?
/**
* Get a page from storage.
*
* @param url The url
* @param fields The fields to load from local storage
* @return The page in storage if exists, otherwise returns null
*/
fun getOrNull(url: String, vararg fields: String): WebPage?
/**
* Get the content of the page from the storage
*
* @param url The url of the page to retrieve
* @return The page content or null
*/
fun getContent(url: String): ByteBuffer?
/**
* Get the content of the page from the storage
*
* @param url The url of the page to retrieve
* @return The page content in string format or null
*/
@Beta
fun getContentAsString(url: String): String?
/**
* Get a webpage from the storage
*
* @param url The url of the page to check
* @return True if the page exists in the storage
*/
fun exists(url: String): Boolean
/**
* Check the fetch state of a webpage
*
* @param page The webpage to check
* @return The fetch state of the webpage
*/
fun fetchState(page: WebPage, options: LoadOptions): CheckState
/**
* Scan webpages in the storage whose url start with [urlPrefix]
*
* @param urlPrefix The url prefix
* @return The iterator of the webpages whose url start with [urlPrefix]
*/
fun scan(urlPrefix: String): Iterator
fun scan(urlPrefix: String, fields: Iterable): Iterator
fun scan(urlPrefix: String, fields: Array): Iterator
/**
* Load a url with specified options, see [LoadOptions] for all options
*
* @param url The url followed by options
* @param options The options
* @return The WebPage. If there is no web page at local storage nor remote location, [WebPage.NIL] is returned
*/
fun load(url: String, options: LoadOptions): WebPage
/**
* Load a url with specified options, see [LoadOptions] for all options
*
* @param url The url followed by options
* @param options The options
* @return The WebPage. If there is no web page at local storage nor remote location, [WebPage.NIL] is returned
*/
fun load(url: URL, options: LoadOptions): WebPage
/**
* Load a url, options can be specified following the url, see [LoadOptions] for all options
*
* @param url The url followed by options
* @return The WebPage. If there is no web page at local storage nor remote location, [WebPage.NIL] is returned
*/
fun load(url: NormURL): WebPage
/**
* Load a url, options can be specified following the url, see [LoadOptions] for all options
*
* @param url The url followed by options
* @return The WebPage. If there is no web page at local storage nor remote location, [WebPage.NIL] is returned
*/
suspend fun loadDeferred(url: NormURL): WebPage
/**
* Load a batch of urls with the specified options.
*
* If the option indicates prefer parallel, urls are fetched in a parallel manner whenever applicable.
* If the batch is too large, only a random part of the urls is fetched immediately, all the rest urls are put into
* a pending fetch list and will be fetched in background later.
*
* If a page exists neither in local storage nor at the given remote location, [WebPage.NIL] is returned
*
* @param urls The urls to load
* @param options The options
* @return Pages for all urls.
*/
fun loadAll(urls: Iterable, options: LoadOptions): Collection
/**
* Load a batch of urls with the specified options.
*
* If the option indicates prefer parallel, urls are fetched in a parallel manner whenever applicable.
* If the batch is too large, only a random part of the urls is fetched immediately, all the rest urls are put into
* a pending fetch list and will be fetched in background later.
*
* If a page exists neither in local storage nor at the given remote location, [WebPage.NIL] is returned
*
* @param urls The urls to load
* @return Pages for all urls.
*/
fun loadAll(urls: Iterable): Collection
/**
* Load a url asynchronously, the url is added to the task queue, and will be executed asynchronously
* */
fun loadAsync(url: NormURL): CompletableFuture
/**
* Load a batch of urls asynchronously, the urls are added to the task queue, and will be executed asynchronously
* */
fun loadAllAsync(urls: Iterable): List>
/**
* Submit a url, the url will be added to the task queue, and will be executed asynchronously.
*
* The url should be standard or degenerate, otherwise it will be discarded.
*
* @param url The url to submit, which will be added to the task queue
* @return The [PulsarContext] itself to enabled chained operations
* */
fun submit(url: UrlAware): PulsarContext
/**
* Submit a batch of urls, the urls are added to the task queue, and will be executed asynchronously.
*
* The urls should be standard or degenerate, otherwise they will be discarded.
*
* @param urls The urls to submit, which will be added to the task queue
* @return The [PulsarContext] itself to enabled chained operations
* */
fun submitAll(urls: Iterable): PulsarContext
/**
* Parse the WebPage using ParseComponent
*/
fun parse(page: WebPage): FeaturedDocument?
/**
* Chat with the AI model.
*
* @param prompt The prompt to chat
* @param model The model to chat
* @param apiKey The api key to chat
*/
fun chat(prompt: String, model: String, apiKey: String): ModelResponse
/**
* Persist the webpage into the storage immediately.
* By default, the backend storage is the local file system, if mongodb is detected,
* the mongodb will be used as the backend storage.
*/
fun persist(page: WebPage)
/**
* Delete the webpage from the backend storage
*/
fun delete(url: String)
/**
* Delete the webpage from the backend storage
*/
fun delete(page: WebPage)
/**
* Flush the backend storage
*/
fun flush()
/**
* Wait until all tasks are done.
* */
@Throws(InterruptedException::class)
fun await()
/**
* Register shutdown hook
* */
fun registerShutdownHook()
}
