import { h, Transition, defineComponent, computed, provide, nextTick, ref, toRef } from 'vue';
import { throttle } from 'lodash-es';
import { useTheme, useHljs, useConfig } from '../../_mixins';
import { warn } from '../../_utils';
import { NScrollbar } from '../../_internal';
import { NCode } from '../../code';
import { logLight } from '../styles';
import NLogLoader from './LogLoader';
import NLogLine from './LogLine';
import style from './styles/index.cssr';
export const logInjectionKey = Symbol('log');
const logProps = Object.assign(Object.assign({}, useTheme.props), { loading: {
        type: Boolean,
        default: false
    }, trim: {
        type: Boolean,
        default: false
    }, log: String, fontSize: {
        type: Number,
        default: 14
    }, lines: {
        type: Array,
        default: () => []
    }, lineHeight: {
        type: Number,
        default: 1.25
    }, language: String, rows: {
        type: Number,
        default: 15
    }, offsetTop: {
        type: Number,
        default: 0
    }, offsetBottom: {
        type: Number,
        default: 0
    }, hljs: {
        type: Object,
        default: undefined
    }, onReachTop: Function, onReachBottom: Function, onRequireMore: Function });
export default defineComponent({
    name: 'Log',
    props: logProps,
    setup(props) {
        const { mergedClsPrefixRef } = useConfig(props);
        const slientRef = ref(false);
        const highlightRef = computed(() => {
            return props.language !== undefined;
        });
        const styleHeightRef = computed(() => {
            const lineHeight = Math.floor(props.fontSize * props.lineHeight);
            return `calc(${props.rows * lineHeight}px)`;
        });
        const mergedLinesRef = computed(() => {
            const { log } = props;
            if (log) {
                return log.split('\n');
            }
            return props.lines;
        });
        const scrollbarRef = ref(null);
        const themeRef = useTheme('Log', 'Log', style, logLight, props, mergedClsPrefixRef);
        function handleScroll(e) {
            const container = e.target;
            const content = container.firstElementChild;
            if (slientRef.value) {
                void nextTick(() => {
                    slientRef.value = false;
                });
                return;
            }
            const containerHeight = container.offsetHeight;
            const containerScrollTop = container.scrollTop;
            const contentHeight = content.offsetHeight;
            const scrollTop = containerScrollTop;
            const scrollBottom = contentHeight - containerScrollTop - containerHeight;
            if (scrollTop <= props.offsetTop) {
                const { onReachTop, onRequireMore } = props;
                if (onRequireMore)
                    onRequireMore('top');
                if (onReachTop)
                    onReachTop();
            }
            if (scrollBottom <= props.offsetBottom) {
                const { onReachBottom, onRequireMore } = props;
                if (onRequireMore)
                    onRequireMore('bottom');
                if (onReachBottom)
                    onReachBottom();
            }
        }
        const handleWheel = throttle(_handleWheel, 300);
        function _handleWheel(e) {
            if (slientRef.value) {
                void nextTick(() => {
                    slientRef.value = false;
                });
                return;
            }
            if (scrollbarRef.value) {
                const { containerRef, contentRef } = scrollbarRef.value;
                if (containerRef && contentRef) {
                    const containerHeight = containerRef.offsetHeight;
                    const containerScrollTop = containerRef.scrollTop;
                    const contentHeight = contentRef.offsetHeight;
                    const scrollTop = containerScrollTop;
                    const scrollBottom = contentHeight - containerScrollTop - containerHeight;
                    const deltaY = e.deltaY;
                    if (scrollTop === 0 && deltaY < 0) {
                        const { onRequireMore } = props;
                        if (onRequireMore)
                            onRequireMore('top');
                    }
                    if (scrollBottom <= 0 && deltaY > 0) {
                        const { onRequireMore } = props;
                        if (onRequireMore)
                            onRequireMore('bottom');
                    }
                }
            }
        }
        function scrollTo(options) {
            const { value: scrollbarInst } = scrollbarRef;
            if (!scrollbarInst)
                return;
            const { slient, top, position } = options;
            if (slient) {
                slientRef.value = true;
            }
            if (top !== undefined) {
                scrollbarInst.scrollTo({ left: 0, top });
            }
            else if (position === 'bottom' || position === 'top') {
                scrollbarInst.scrollTo({ position });
            }
        }
        // deprecated
        function scrollToTop(slient = false) {
            warn('log', "`scrollToTop` is deprecated, please use `scrollTo({ position: 'top'})` instead.");
            scrollTo({
                position: 'top',
                slient
            });
        }
        function scrollToBottom(slient = false) {
            warn('log', "`scrollToTop` is deprecated, please use `scrollTo({ position: 'bottom'})` instead.");
            scrollTo({
                position: 'bottom',
                slient
            });
        }
        provide(logInjectionKey, {
            languageRef: toRef(props, 'language'),
            mergedHljsRef: useHljs(props, highlightRef),
            trimRef: toRef(props, 'trim'),
            highlightRef
        });
        return {
            mergedClsPrefix: mergedClsPrefixRef,
            scrollbarRef,
            mergedTheme: themeRef,
            styleHeight: styleHeightRef,
            mergedLines: mergedLinesRef,
            scrollTo,
            scrollToTop,
            scrollToBottom,
            handleWheel,
            handleScroll,
            cssVars: computed(() => {
                const { self: { loaderFontSize, loaderTextColor, loaderColor, loaderBorder, loadingColor }, common: { cubicBezierEaseInOut } } = themeRef.value;
                return {
                    '--bezier': cubicBezierEaseInOut,
                    '--loader-font-size': loaderFontSize,
                    '--loader-border': loaderBorder,
                    '--loader-color': loaderColor,
                    '--loader-text-color': loaderTextColor,
                    '--loading-color': loadingColor
                };
            })
        };
    },
    render() {
        const { mergedClsPrefix, mergedTheme } = this;
        return h('div', {
            class: `${mergedClsPrefix}-log`,
            style: [
                {
                    lineHeight: this.lineHeight,
                    height: this.styleHeight
                },
                this.cssVars
            ],
            onWheelPassive: this.handleWheel
        }, [
            h(NScrollbar, { ref: "scrollbarRef", theme: mergedTheme.peers.Scrollbar, themeOverrides: mergedTheme.peerOverrides.Scrollbar, onScroll: this.handleScroll }, {
                default: () => (h(NCode, { internalNoHighlight: true, internalFontSize: this.fontSize, theme: mergedTheme.peers.Code, themeOverrides: mergedTheme.peerOverrides.Code }, {
                    default: () => this.mergedLines.map((line, index) => {
                        return h(NLogLine, { key: index, line: line });
                    })
                }))
            }),
            h(Transition, { name: "fade-in-scale-up-transition" }, {
                default: () => this.loading ? h(NLogLoader, { clsPrefix: mergedClsPrefix }) : null
            })
        ]);
    }
});
