import {isRef, reactive, ref, toRefs, unref, watch, watchEffect} from "vue";
import {getCookieForName, throttle} from "@/api/method";
import JSONBigInt from 'json-bigint';

const JSONBigIntStr = JSONBigInt({storeAsString: true});

export function useBoeApiPage(_url, params = {}, config = {
    init: true,
    result: res => res.result,
    totalPage: res => res.result.totalPage,
    total: res => res.result.totalElement
}) {

    const state = reactive({
        data: [],
        loading: false,
        page: 1,
        pageSize: 10,
        totalPage: 0,
        total: 0
    })

    if (isRef(params)) {
        watch(params.value, () => {
            fetch()
        })
    }

    if (isRef(_url)) {
        watchEffect(fetch)
    } else {
        fetch()
    }

    function fetch() {
        state.loading = true
        return boeRequest(unref(_url), unref(params)).then(r => {
            state.data = config.result(r)
            state.totalPage = config.totalPage(r)
            state.total = config.total(r)
            state.loading = false
            state.page = params.page
        })
    }

    function reset() {
        state.data = []
        state.loading = false
        state.page = 1
        state.totalPage = 0
        state.total = 0
    }

    config.init && fetch()
    return {
        ...toRefs(state),
        fetch,
        reset
    };
}

export function useBoeApi(_url, params = {}, config = {
    init: true,
    result: res => res.result,
}) {

    const state = reactive({
        data: [],
        loading: false,
    })
    watch(() => params, () => {
        fetch()
    })

    function fetch() {
        state.loading = true
        return boeRequest(_url, params).then(r => {
            state.data = config.result(r)
            state.loading = false
        })
    }

    config.init && fetch()
    return {
        ...toRefs(state),
        fetch,
    };
}

export function useBoeUserListPage(_url, params = {}, init = true) {

    const state = reactive({
        data: [],
        loading: false,
        total: 0,
        totalPage: 0,
        page: 1,
        ...params
    })

    watch(() => params.keyword, throttle(fetch, 600))
    watch(() => params.page, fetch)

    function fetch() {
        state.loading = true
        if (!params.keyword) {
            state.loading = false
            return
        }
        return boeRequest(_url, params).then(r => {
            state.data = params.page === 1 ? r.result.userInfoList : [...state.data, ...r.result.userInfoList]
            state.totalPage = r.result.totalPage
            state.total = r.result.totalElement
            state.loading = false
        })
    }

    init && fetch()
    return {
        ...toRefs(state),
        fetch,
    };
}

export function useRowsPage(_url, params, init = true) {

    const state = reactive({
        data: [],
        total: 1,
        current: 1,
        pages: 1,
        loading: false
    })

    if (isRef(params)) {
        watch(params.value, () => {
            fetch()
        })
    }

    if (isRef(_url)) {
        watchEffect(fetch)
    } else {
        init && fetch()
    }

    function reset() {
        state.data = []
        state.loading = false
    }

    function fetch() {
        state.loading = true
        return request(unref(_url), unref(params)).then(r => {
            state.data = r.data.rows
            state.current = r.data.current
            state.pages = r.data.pages
            state.total = r.data.total
            state.loading = false
        })
    }

    return {
        ...toRefs(state),
        fetch,
        reset,
    };
}

export function usePage(_url, params, init = true) {

    const state = reactive({
        data: [],
        total: 1,
        current: 1,
        pages: 1,
        loading: false
    })

    if (isRef(params)) {
        watch(params.value, () => {
            fetch()
        })
    }

    if (isRef(_url)) {
        watchEffect(fetch)
    } else {
        init && fetch()
    }

    function reset() {
        state.data = []
        state.loading = false
    }

    function fetch() {
        state.loading = true
        return request(unref(_url), unref(params)).then(r => {
            state.data = r.data.records
            state.current = r.data.current
            state.pages = r.data.pages
            state.total = r.data.total
            state.loading = false
        })
    }

    return {
        ...toRefs(state),
        fetch,
        reset,
    };
}

export function useRequest(_url, params = {}, init = true) {

    const data = ref({})
    const loading = ref(false)

    watch(params, () => {
        fetchData()
    })

    function fetchData() {
        loading.value = true
        request(_url, params).then(r => {
            data.value = r
            loading.value = false
        })
    }

    init && fetchData()
    return {
        data,
        loading,
        fetchData,
    };
}

export async function boeRequest(_url, params) {
    const s = _url.split(' ')
    let url = s[0]
    const method = s[1]?.toLowerCase() || 'get'
    if (method === 'get') {
        url.includes('?') ? (url.endsWith('&') || (url += '&')) : (url += '?')
        url += Object.keys(params).map(key => key + '=' + params[key]).join('&')
    }
    const body = method !== 'get' ? s[2] === 'formData' ? formatFormData(params) : params : {}
    url = process.env.NODE_ENV === 'development' ? url : window.location.protocol + process.env.VUE_APP_BOE_API_URL + url
    return fetch(url, {
        method,
        headers: {
            token: getCookieForName('token'),
            ...method !== 'get' && s[2] !== 'formData' ? {'Content-Type': 'application/json'} : {}
        },
        ...method !== 'get' ? {body: s[2] === 'formData' ? body : JSON.stringify(body)} : {}
    }).then(res => {
        return res.text()
    }).then(res => {
        return JSONBigIntStr.parse(res)
    })
}

function formatFormData(data) {
    const formData = new FormData();
    Object.keys(data).forEach(k => formData.append(k, data[k]))
    return formData
}

export async function request(_url, params) {
    const s = _url.split(' ')
    let url = s[0]
    const method = s[1]?.toLowerCase() || 'get'
    if (method === 'get') {
        let paramsArray = [];
        if (params) {
            Object.keys(params).forEach(key => paramsArray.push(key + '=' + params[key]))
            if (url.search(/\?/) === -1) {
                url += '?' + paramsArray.join('&')
            } else {
                url += '&' + paramsArray.join('&')
            }
        }
    }
    const body = method !== 'get' ? params || {} : {}
    return fetch(process.env.VUE_APP_BASE_API + url, {
        method,
        headers: {
            token: getCookieForName('token'),
            ...method !== 'get' ? {'Content-Type': 'application/json'} : {}
        },
        ...method !== 'get' ? {body: JSON.stringify(body)} : {}
    }).then(res => {
        return res.text()
    }).then(res => {
        return JSONBigIntStr.parse(res)
    })
}