import { useState, useMemo, useRef, useEffect } from "react"
import { VoiceChangerServerSetting, ServerInfo, Framework, OnnxExecutionProvider, DefaultVoiceChangerServerSetting, ServerSettingKey } from "../const"
import { VoiceChangerClient } from "../VoiceChangerClient"


export type FileUploadSetting = {
    pyTorchModel: File | null
    configFile: File | null
    onnxModel: File | null
}
const InitialFileUploadSetting: FileUploadSetting = {
    pyTorchModel: null,
    configFile: null,
    onnxModel: null,
}
export type UseServerSettingProps = {
    voiceChangerClient: VoiceChangerClient | null
}

export type ServerSettingState = {
    setting: VoiceChangerServerSetting;
    serverInfo: ServerInfo | undefined;
    fileUploadSetting: FileUploadSetting
    setFramework: (framework: Framework) => Promise<boolean>;
    setOnnxExecutionProvider: (provider: OnnxExecutionProvider) => Promise<boolean>;
    setSrcId: (num: number) => Promise<boolean>;
    setDstId: (num: number) => Promise<boolean>;
    setConvertChunkNum: (num: number) => Promise<boolean>;
    setMinConvertSize: (num: number) => Promise<boolean>
    setGpu: (num: number) => Promise<boolean>;
    setCrossFadeOffsetRate: (num: number) => Promise<boolean>;
    setCrossFadeEndRate: (num: number) => Promise<boolean>;
    setCrossFadeOverlapRate: (num: number) => Promise<boolean>;
    reloadServerInfo: () => Promise<void>;
    setFileUploadSetting: (val: FileUploadSetting) => void
    loadModel: () => Promise<void>
    uploadProgress: number
    isUploading: boolean
}

export const useServerSetting = (props: UseServerSettingProps): ServerSettingState => {
    const settingRef = useRef<VoiceChangerServerSetting>(DefaultVoiceChangerServerSetting)
    const [setting, _setSetting] = useState<VoiceChangerServerSetting>(settingRef.current)
    const [serverInfo, _setServerInfo] = useState<ServerInfo>()
    const [fileUploadSetting, setFileUploadSetting] = useState<FileUploadSetting>(InitialFileUploadSetting)

    //////////////
    // 設定
    /////////////
    //// サーバに設定後、反映された情報と照合して値が一致していることを確認。一致していない場合はalert
    const _set_and_store = async (key: ServerSettingKey, newVal: string) => {
        if (!props.voiceChangerClient) return false

        const res = await props.voiceChangerClient.updateServerSettings(key, "" + newVal)

        _setServerInfo(res)
        if (newVal == res[key]) {
            _setSetting({
                ...settingRef.current,
                convertChunkNum: res.convertChunkNum,
                minConvertSize: res.minConvertSize,
                srcId: res.srcId,
                dstId: res.dstId,
                gpu: res.gpu,
                crossFadeOffsetRate: res.crossFadeOffsetRate,
                crossFadeEndRate: res.crossFadeEndRate,
                crossFadeOverlapRate: res.crossFadeOverlapRate,
                framework: res.framework,
                onnxExecutionProvider: (!!res.onnxExecutionProvider && res.onnxExecutionProvider.length > 0) ? res.onnxExecutionProvider[0] as OnnxExecutionProvider : DefaultVoiceChangerServerSetting.onnxExecutionProvider
            })
            return true
        } else {
            alert(`[ServerSetting] 設定が反映されていません([key:${key}, new:${newVal}, res:${res[key]}])。モデルの切り替えの場合、処理が非同期で行われるため反映されていないように見える場合があります。サーバコントロールのリロードボタンを押すとGUIに反映されるます。`)
            return false
        }

    }

    const setFramework = useMemo(() => {
        return async (framework: Framework) => {
            return await _set_and_store(ServerSettingKey.framework, "" + framework)
        }
    }, [props.voiceChangerClient])

    const setOnnxExecutionProvider = useMemo(() => {
        return async (provider: OnnxExecutionProvider) => {
            return await _set_and_store(ServerSettingKey.onnxExecutionProvider, "" + provider)
        }
    }, [props.voiceChangerClient])

    const setSrcId = useMemo(() => {
        return async (num: number) => {
            return await _set_and_store(ServerSettingKey.srcId, "" + num)
        }
    }, [props.voiceChangerClient])

    const setDstId = useMemo(() => {
        return async (num: number) => {
            return await _set_and_store(ServerSettingKey.dstId, "" + num)
        }
    }, [props.voiceChangerClient])

    const setConvertChunkNum = useMemo(() => {
        return async (num: number) => {
            return await _set_and_store(ServerSettingKey.convertChunkNum, "" + num)
        }
    }, [props.voiceChangerClient])

    const setMinConvertSize = useMemo(() => {
        return async (num: number) => {
            return await _set_and_store(ServerSettingKey.minConvertSize, "" + num)
        }
    }, [props.voiceChangerClient])


    const setGpu = useMemo(() => {
        return async (num: number) => {
            return await _set_and_store(ServerSettingKey.gpu, "" + num)
        }
    }, [props.voiceChangerClient])

    const setCrossFadeOffsetRate = useMemo(() => {
        return async (num: number) => {
            return await _set_and_store(ServerSettingKey.crossFadeOffsetRate, "" + num)
        }
    }, [props.voiceChangerClient])
    const setCrossFadeEndRate = useMemo(() => {
        return async (num: number) => {
            return await _set_and_store(ServerSettingKey.crossFadeEndRate, "" + num)
        }
    }, [props.voiceChangerClient])
    const setCrossFadeOverlapRate = useMemo(() => {
        return async (num: number) => {
            return await _set_and_store(ServerSettingKey.crossFadeOverlapRate, "" + num)
        }
    }, [props.voiceChangerClient])



    //////////////
    // 操作
    /////////////
    const [uploadProgress, setUploadProgress] = useState<number>(0)
    const [isUploading, setIsUploading] = useState<boolean>(false)

    // (e) モデルアップロード
    const _uploadFile = useMemo(() => {
        return async (file: File, onprogress: (progress: number, end: boolean) => void) => {
            if (!props.voiceChangerClient) return
            const num = await props.voiceChangerClient.uploadFile(file, onprogress)
            const res = await props.voiceChangerClient.concatUploadedFile(file, num)
            console.log("uploaded", num, res)
        }
    }, [props.voiceChangerClient])
    const loadModel = useMemo(() => {
        return async () => {
            if (!fileUploadSetting.pyTorchModel && !fileUploadSetting.onnxModel) {
                alert("PyTorchモデルとONNXモデルのどちらか一つ以上指定する必要があります。")
                return
            }
            if (!fileUploadSetting.configFile) {
                alert("Configファイルを指定する必要があります。")
                return
            }
            if (!props.voiceChangerClient) return
            setUploadProgress(0)
            setIsUploading(true)
            const models = [fileUploadSetting.pyTorchModel, fileUploadSetting.onnxModel].filter(x => { return x != null }) as File[]
            for (let i = 0; i < models.length; i++) {
                const progRate = 1 / models.length
                const progOffset = 100 * i * progRate
                await _uploadFile(models[i], (progress: number, _end: boolean) => {
                    // console.log(progress * progRate + progOffset, end, progRate,)
                    setUploadProgress(progress * progRate + progOffset)
                })
            }

            await _uploadFile(fileUploadSetting.configFile, (progress: number, end: boolean) => {
                console.log(progress, end)
            })

            await props.voiceChangerClient.loadModel(fileUploadSetting.configFile, fileUploadSetting.pyTorchModel, fileUploadSetting.onnxModel)
            setUploadProgress(0)
            setIsUploading(false)
            reloadServerInfo()
        }
    }, [fileUploadSetting, props.voiceChangerClient])

    const reloadServerInfo = useMemo(() => {
        return async () => {
            if (!props.voiceChangerClient) return
            const res = await props.voiceChangerClient.getServerSettings()
            _setServerInfo(res)
            _setSetting({
                ...settingRef.current,
                convertChunkNum: res.convertChunkNum,
                srcId: res.srcId,
                dstId: res.dstId,
                gpu: res.gpu,
                crossFadeOffsetRate: res.crossFadeOffsetRate,
                crossFadeEndRate: res.crossFadeEndRate,
                crossFadeOverlapRate: res.crossFadeOverlapRate,
                framework: res.framework,
                onnxExecutionProvider: (!!res.onnxExecutionProvider && res.onnxExecutionProvider.length > 0) ? res.onnxExecutionProvider[0] as OnnxExecutionProvider : DefaultVoiceChangerServerSetting.onnxExecutionProvider
            })
        }
    }, [props.voiceChangerClient])


    //////////////
    // デフォルト設定
    /////////////
    useEffect(() => {
        const params = new URLSearchParams(location.search);
        const colab = params.get("colab")
        if (colab == "true") {
        } else {
        }
    }, [props.voiceChangerClient])



    return {
        setting,
        serverInfo,
        fileUploadSetting,
        setFramework,
        setOnnxExecutionProvider,
        setSrcId,
        setDstId,
        setConvertChunkNum,
        setMinConvertSize,
        setGpu,
        setCrossFadeOffsetRate,
        setCrossFadeEndRate,
        setCrossFadeOverlapRate,
        reloadServerInfo,
        setFileUploadSetting,
        loadModel,
        uploadProgress,
        isUploading,
    }
}