import type { UseSuspenseQueryResult } from '@tanstack/react-query';

import { closeAllModals, openModal } from '@mantine/modals';
import { useCallback, useMemo, useState } from 'react';
import { useTranslation } from 'react-i18next';

import {
    PlaylistQueryBuilder,
    PlaylistQueryBuilderRef,
} from '/@/renderer/features/playlists/components/playlist-query-builder';
import { useUpdatePlaylist } from '/@/renderer/features/playlists/mutations/update-playlist-mutation';
import { convertQueryGroupToNDQuery } from '/@/renderer/features/playlists/utils';
import { JsonPreview } from '/@/renderer/features/shared/components/json-preview';
import { Box } from '/@/shared/components/box/box';
import { Button } from '/@/shared/components/button/button';
import { Flex } from '/@/shared/components/flex/flex';
import { Group } from '/@/shared/components/group/group';
import { Icon } from '/@/shared/components/icon/icon';
import { JsonInput } from '/@/shared/components/json-input/json-input';
import { ConfirmModal } from '/@/shared/components/modal/modal';
import { ScrollArea } from '/@/shared/components/scroll-area/scroll-area';
import { SegmentedControl } from '/@/shared/components/segmented-control/segmented-control';
import { Stack } from '/@/shared/components/stack/stack';
import { Text } from '/@/shared/components/text/text';
import { toast } from '/@/shared/components/toast/toast';
import { SongListSort } from '/@/shared/types/domain-types';

export interface PlaylistQueryEditorProps {
    detailQuery: UseSuspenseQueryResult<any, Error>;
    handleSave: (
        filter: Record<string, any>,
        extraFilters: {
            limit?: number;
            limitPercent?: number;
            sortBy?: string[];
            sortOrder?: string;
        },
    ) => void;
    handleSaveAs: (
        filter: Record<string, any>,
        extraFilters: {
            limit?: number;
            limitPercent?: number;
            sortBy?: string[];
            sortOrder?: string;
        },
    ) => void;
    isQueryBuilderExpanded: boolean;
    onToggleExpand: () => void;
    playlistId: string;
    queryBuilderRef: React.RefObject<null | PlaylistQueryBuilderRef>;
    updatePlaylistMutation: ReturnType<typeof useUpdatePlaylist>;
}

type AppliedJsonState = {
    limit?: number;
    limitPercent?: number;
    query: Record<string, any>;
    sort?: string;
};

type EditorMode = 'builder' | 'json';

const serializeFiltersToRulesJson = (filters: {
    extraFilters: { limit?: number; limitPercent?: number; sortBy?: string[] };
    filters: any;
}): Record<string, any> => {
    const queryValue = convertQueryGroupToNDQuery(filters.filters);
    const sortString = filters.extraFilters.sortBy?.[0];
    return {
        ...queryValue,
        ...(filters.extraFilters.limit != null && { limit: filters.extraFilters.limit }),
        ...(filters.extraFilters.limitPercent != null && {
            limitPercent: filters.extraFilters.limitPercent,
        }),
        ...(sortString && { sort: sortString }),
    };
};

const parseRulesJsonToSaveArgs = (
    parsed: Record<string, any>,
): {
    extraFilters: { limit?: number; limitPercent?: number; sortBy?: string[] };
    filter: Record<string, any>;
} => {
    const rootKey = parsed.all ? 'all' : 'any';
    const filter = rootKey in parsed ? { [rootKey]: parsed[rootKey] } : { all: [] };
    return {
        extraFilters: {
            ...(parsed.limit != null && { limit: parsed.limit }),
            ...(parsed.limitPercent != null && { limitPercent: parsed.limitPercent }),
            ...(parsed.sort != null && { sortBy: [parsed.sort] }),
        },
        filter,
    };
};

export const PlaylistQueryEditor = ({
    detailQuery,
    handleSave,
    handleSaveAs,
    isQueryBuilderExpanded,
    onToggleExpand,
    playlistId,
    queryBuilderRef,
    updatePlaylistMutation,
}: PlaylistQueryEditorProps) => {
    const { t } = useTranslation();

    const [editorMode, setEditorMode] = useState<EditorMode>('builder');
    const [jsonText, setJsonText] = useState('');
    const [appliedJsonState, setAppliedJsonState] = useState<AppliedJsonState | null>(null);

    const getFiltersForSave = useCallback((): null | {
        extraFilters: {
            limit?: number;
            limitPercent?: number;
            sortBy?: string[];
            sortOrder?: string;
        };
        filter: Record<string, any>;
    } => {
        if (editorMode === 'json') {
            try {
                const parsed = JSON.parse(jsonText) as Record<string, any>;
                const { extraFilters, filter } = parseRulesJsonToSaveArgs(parsed);
                return { extraFilters, filter };
            } catch {
                return null;
            }
        }
        const filters = queryBuilderRef.current?.getFilters();
        if (!filters) return null;
        return {
            extraFilters: filters.extraFilters,
            filter: convertQueryGroupToNDQuery(filters.filters),
        };
    }, [editorMode, jsonText, queryBuilderRef]);

    const openPreviewModal = useCallback(() => {
        const payload = getFiltersForSave();
        if (!payload) {
            if (editorMode === 'json') {
                toast.error({ message: t('error.invalidJson') });
            }
            return;
        }
        const previewValue = {
            ...payload.filter,
            ...(payload.extraFilters.limit != null && { limit: payload.extraFilters.limit }),
            ...(payload.extraFilters.limitPercent != null && {
                limitPercent: payload.extraFilters.limitPercent,
            }),
            ...(payload.extraFilters.sortBy?.[0] && { sort: payload.extraFilters.sortBy[0] }),
        };
        openModal({
            children: <JsonPreview value={previewValue} />,
            size: 'xl',
            title: t('common.preview'),
        });
    }, [editorMode, getFiltersForSave, t]);

    const openSaveAndReplaceModal = useCallback(() => {
        if (!isQueryBuilderExpanded) return;
        const payload = getFiltersForSave();
        if (!payload) {
            if (editorMode === 'json') {
                toast.error({ message: t('error.invalidJson') });
            }
            return;
        }
        openModal({
            children: (
                <ConfirmModal
                    onConfirm={() => {
                        handleSave(payload.filter, payload.extraFilters);
                        closeAllModals();
                    }}
                >
                    <Text>{t('common.areYouSure')}</Text>
                </ConfirmModal>
            ),
            title: t('common.saveAndReplace'),
        });
    }, [editorMode, getFiltersForSave, handleSave, isQueryBuilderExpanded, t]);

    const parseSortBy = useCallback((): string[] => {
        const sort = detailQuery?.data?.rules?.sort;
        // Handle new syntax: comma-separated with +/- prefix
        // e.g., "+album,-year" -> return as single string in array
        if (typeof sort === 'string') {
            // Check if it's new syntax (has +/- prefix or commas)
            if (sort.includes(',') || sort.startsWith('+') || sort.startsWith('-')) {
                return [sort];
            }
            // Old syntax: single field, convert to new format with default order
            const order = detailQuery?.data?.rules?.order || 'asc';
            const prefix = order === 'desc' ? '-' : '+';
            return [`${prefix}${sort}`];
        }
        if (Array.isArray(sort)) {
            // If array, check if first item has +/- prefix
            if (
                sort.length > 0 &&
                typeof sort[0] === 'string' &&
                (sort[0].startsWith('+') || sort[0].startsWith('-'))
            ) {
                return sort;
            }
            // Old array format, convert to new format
            const order = detailQuery?.data?.rules?.order || 'asc';
            const prefix = order === 'desc' ? '-' : '+';
            return sort.map((s) => `${prefix}${s}`);
        }
        return ['+dateAdded'];
    }, [detailQuery?.data?.rules?.order, detailQuery?.data?.rules?.sort]);

    const parseSortOrder = useCallback((): 'asc' | 'desc' => {
        const sort = detailQuery?.data?.rules?.sort;
        if (typeof sort === 'string' && sort.startsWith('-')) {
            return 'desc';
        }
        // Fall back to old order field or default
        return detailQuery?.data?.rules?.order || 'asc';
    }, [detailQuery?.data?.rules?.order, detailQuery?.data?.rules?.sort]);

    const appliedQuery = appliedJsonState?.query;
    const detailQueryRules = detailQuery?.data?.rules;
    const effectiveQuery = useMemo(
        () =>
            appliedQuery ??
            (detailQueryRules?.all
                ? { all: detailQueryRules.all }
                : detailQueryRules?.any
                  ? { any: detailQueryRules.any }
                  : detailQueryRules),
        [appliedQuery, detailQueryRules],
    );
    const effectiveLimit = appliedJsonState?.limit ?? detailQuery?.data?.rules?.limit;
    const effectiveLimitPercent =
        appliedJsonState?.limitPercent ?? detailQuery?.data?.rules?.limitPercent;

    const appliedSort = appliedJsonState?.sort;
    const effectiveSortBy = useMemo(
        () => (appliedSort ? [appliedSort] : parseSortBy()) as SongListSort | SongListSort[],
        [appliedSort, parseSortBy],
    );
    const effectiveSortOrder = appliedJsonState?.sort
        ? appliedJsonState.sort.startsWith('-')
            ? 'desc'
            : 'asc'
        : parseSortOrder();

    const handleEditorModeChange = useCallback(
        (value: string) => {
            const nextMode = value as EditorMode;
            if (nextMode === 'json') {
                const filters = queryBuilderRef.current?.getFilters();
                if (filters) {
                    setJsonText(JSON.stringify(serializeFiltersToRulesJson(filters), null, 2));
                } else {
                    const fallback: Record<string, any> = effectiveQuery
                        ? { ...effectiveQuery }
                        : { all: [] };
                    if (effectiveLimit != null) fallback.limit = effectiveLimit;
                    if (effectiveLimitPercent != null)
                        fallback.limitPercent = effectiveLimitPercent;
                    if (effectiveSortBy?.[0]) fallback.sort = effectiveSortBy[0];
                    if (!fallback.sort) fallback.sort = '+dateAdded';
                    setJsonText(JSON.stringify(fallback, null, 2));
                }
                setEditorMode('json');
            } else {
                if (editorMode === 'json') {
                    try {
                        const parsed = JSON.parse(jsonText) as Record<string, any>;
                        const rootKey = parsed.all ? 'all' : 'any';
                        if (!parsed[rootKey] || !Array.isArray(parsed[rootKey])) {
                            throw new Error('Invalid rules structure');
                        }
                        setAppliedJsonState({
                            limit: parsed.limit,
                            limitPercent: parsed.limitPercent,
                            query: { [rootKey]: parsed[rootKey] },
                            sort: parsed.sort,
                        });
                    } catch {
                        toast.error({
                            message: t('error.invalidJson'),
                        });
                        return;
                    }
                }
                setEditorMode('builder');
            }
        },
        [
            editorMode,
            effectiveLimit,
            effectiveLimitPercent,
            effectiveQuery,
            effectiveSortBy,
            jsonText,
            queryBuilderRef,
            t,
        ],
    );

    return (
        <div
            className="query-editor-container"
            style={{ borderTop: '1px solid var(--theme-colors-border)' }}
        >
            <Stack gap={0} h="100%" mah="30dvh" p="sm" w="100%">
                <Group justify="space-between" wrap="nowrap">
                    <Group gap="sm" wrap="nowrap">
                        <Button
                            leftSection={
                                <Icon
                                    icon={isQueryBuilderExpanded ? 'arrowDownS' : 'arrowUpS'}
                                    size="lg"
                                />
                            }
                            onClick={onToggleExpand}
                            size="sm"
                            variant="subtle"
                        >
                            {t('form.queryEditor.title')}
                        </Button>
                        {isQueryBuilderExpanded && (
                            <SegmentedControl
                                data={[
                                    {
                                        label: (
                                            <Flex>
                                                <Icon icon="queryBuilder" />
                                            </Flex>
                                        ),
                                        value: 'builder',
                                    },
                                    {
                                        label: (
                                            <Flex>
                                                <Icon icon="json" />
                                            </Flex>
                                        ),
                                        value: 'json',
                                    },
                                ]}
                                onChange={handleEditorModeChange}
                                size="xs"
                                value={editorMode}
                            />
                        )}
                    </Group>
                    <Group gap="xs">
                        <Button onClick={openPreviewModal} size="sm" variant="subtle">
                            {t('common.preview')}
                        </Button>
                        <Button
                            disabled={!isQueryBuilderExpanded}
                            leftSection={<Icon icon="save" />}
                            loading={updatePlaylistMutation?.isPending}
                            onClick={() => {
                                if (!isQueryBuilderExpanded) return;
                                const payload = getFiltersForSave();
                                if (payload) {
                                    handleSaveAs(payload.filter, payload.extraFilters);
                                } else if (editorMode === 'json') {
                                    toast.error({
                                        message: t('error.invalidJson'),
                                    });
                                }
                            }}
                            size="sm"
                            variant="subtle"
                        >
                            {t('common.saveAs')}
                        </Button>
                        <Button
                            disabled={!isQueryBuilderExpanded}
                            leftSection={<Icon color="error" icon="save" />}
                            onClick={openSaveAndReplaceModal}
                            size="sm"
                            variant="subtle"
                        >
                            {t('common.saveAndReplace')}
                        </Button>
                    </Group>
                </Group>
                <Box
                    py="md"
                    style={{
                        display: isQueryBuilderExpanded ? 'flex' : 'none',
                        flex: 1,
                        minHeight: 0,
                        overflow: 'hidden',
                    }}
                >
                    {editorMode === 'builder' ? (
                        <PlaylistQueryBuilder
                            key={JSON.stringify(appliedJsonState ?? detailQuery?.data?.rules)}
                            limit={effectiveLimit}
                            limitPercent={effectiveLimitPercent}
                            playlistId={playlistId}
                            query={effectiveQuery}
                            ref={queryBuilderRef}
                            sortBy={effectiveSortBy}
                            sortOrder={effectiveSortOrder}
                        />
                    ) : (
                        <ScrollArea style={{ flex: 1, minHeight: 0 }}>
                            <JsonInput
                                autosize
                                minRows={8}
                                onChange={(value) => setJsonText(value)}
                                placeholder='{ "all": [], "limit": 100, "sort": "+dateAdded" }'
                                size="lg"
                                spellCheck={false}
                                style={{
                                    flex: 1,
                                    minHeight: 0,
                                }}
                                value={jsonText}
                            />
                        </ScrollArea>
                    )}
                </Box>
            </Stack>
        </div>
    );
};