import { FC, useEffect, useMemo, useState } from 'react';
import { LocalizeText, WiredFurniType } from '../../../../api';
import contextVariableIcon from '../../../../assets/images/wired/var/icon_source_context_clean.png';
import furniVariableIcon from '../../../../assets/images/wired/var/icon_source_furni.png';
import globalVariableIcon from '../../../../assets/images/wired/var/icon_source_global.png';
import userVariableIcon from '../../../../assets/images/wired/var/icon_source_user.png';
import { Text } from '../../../../common';
import { useWired, useWiredTools } from '../../../../hooks';
import { NitroInput } from '../../../../layout';
import { WiredFurniSelectionSourceRow } from '../WiredFurniSelectionSourceRow';
import { WiredVariablePicker } from '../WiredVariablePicker';
import { createFallbackVariableEntry, flattenWiredVariablePickerEntries, IWiredVariablePickerEntry, normalizeVariableTokenFromWire } from '../WiredVariablePickerData';
import { FURNI_SOURCES, sortWiredSourceOptions, USER_SOURCES, useAvailableUserSources, WiredSourceOption } from '../WiredSourcesSelector';
import { WiredConditionBaseView } from './WiredConditionBaseView';

type VariableTargetType = 'user' | 'furni' | 'global' | 'context';

interface IVariableDefinition
{
    availability: number;
    hasValue: boolean;
    itemId: number;
    name: string;
}

const TARGET_USER = 0;
const TARGET_FURNI = 1;
const TARGET_CONTEXT = 2;
const TARGET_GLOBAL = 3;
const COMPARE_VALUE_CREATED = 0;
const COMPARE_VALUE_UPDATED = 1;
const COMPARISON_LOWER_THAN = 0;
const COMPARISON_HIGHER_THAN = 2;
const SOURCE_TRIGGER = 0;
const SOURCE_SELECTED = 100;
const QUANTIFIER_ALL = 0;
const QUANTIFIER_ANY = 1;

const TARGET_BUTTONS: Array<{ key: VariableTargetType; icon: string; disabled?: boolean; }> = [
    { key: 'furni', icon: furniVariableIcon },
    { key: 'user', icon: userVariableIcon },
    { key: 'global', icon: globalVariableIcon },
    { key: 'context', icon: contextVariableIcon }
];

const GLOBAL_SOURCE_OPTIONS: WiredSourceOption[] = [ { value: SOURCE_TRIGGER, label: 'wiredfurni.params.sources.global' } ];
const CONTEXT_SOURCE_OPTIONS: WiredSourceOption[] = [ { value: SOURCE_TRIGGER, label: 'Current execution' } ];
const COMPARE_VALUE_OPTIONS = [ COMPARE_VALUE_CREATED, COMPARE_VALUE_UPDATED ];
const COMPARISON_OPTIONS = [ COMPARISON_LOWER_THAN, COMPARISON_HIGHER_THAN ];
const DURATION_UNITS = [ 0, 1, 2, 3, 4, 5, 6, 7 ];

const getTargetValue = (value: VariableTargetType) =>
{
    switch(value)
    {
        case 'furni': return TARGET_FURNI;
        case 'global': return TARGET_GLOBAL;
        case 'context': return TARGET_CONTEXT;
        default: return TARGET_USER;
    }
};

const normalizeTargetType = (value: number): VariableTargetType =>
{
    switch(value)
    {
        case TARGET_FURNI: return 'furni';
        case TARGET_GLOBAL: return 'global';
        case TARGET_CONTEXT: return 'context';
        default: return 'user';
    }
};

const getTargetDefinitions = (targetType: VariableTargetType, userDefinitions: IVariableDefinition[], furniDefinitions: IVariableDefinition[], roomDefinitions: IVariableDefinition[], contextDefinitions: IVariableDefinition[]) =>
{
    switch(targetType)
    {
        case 'furni': return furniDefinitions;
        case 'global': return roomDefinitions;
        case 'context': return contextDefinitions;
        default: return userDefinitions;
    }
};

const buildCustomVariableEntries = (target: VariableTargetType, definitions: IVariableDefinition[]): IWiredVariablePickerEntry[] =>
{
    return [ ...definitions ]
        .sort((left, right) => left.name.localeCompare(right.name, undefined, { sensitivity: 'base' }) || (left.itemId - right.itemId))
        .map(definition => ({
            id: `custom:${ definition.itemId }`,
            token: `custom:${ definition.itemId }`,
            label: definition.name,
            displayLabel: definition.name,
            searchableText: definition.name,
            selectable: true,
            hasValue: !!definition.hasValue,
            kind: 'custom',
            target
        }));
};

const getSourceTitle = () => LocalizeText('wiredfurni.params.sources.merged.title.variables');

export const WiredConditionVariableAgeMatchView: FC<{}> = () =>
{
    const { trigger = null, furniIds = [], setFurniIds = null, setIntParams = null, setStringParam = null } = useWired();
    const { userVariableDefinitions = [], furniVariableDefinitions = [], roomVariableDefinitions = [], contextVariableDefinitions = [] } = useWiredTools();
    const [ targetType, setTargetType ] = useState<VariableTargetType>('user');
    const [ variableToken, setVariableToken ] = useState('');
    const [ compareValue, setCompareValue ] = useState(COMPARE_VALUE_CREATED);
    const [ comparison, setComparison ] = useState(COMPARISON_LOWER_THAN);
    const [ durationInput, setDurationInput ] = useState('0');
    const [ durationUnit, setDurationUnit ] = useState(1);
    const [ userSource, setUserSource ] = useState(SOURCE_TRIGGER);
    const [ furniSource, setFurniSource ] = useState(SOURCE_TRIGGER);
    const [ quantifier, setQuantifier ] = useState(QUANTIFIER_ALL);

    const availableUserSources = useAvailableUserSources(trigger, USER_SOURCES);
    const orderedUserSources = useMemo(() => sortWiredSourceOptions(availableUserSources, 'users'), [ availableUserSources ]);
    const orderedFurniSources = useMemo(() => sortWiredSourceOptions(FURNI_SOURCES, 'furni'), []);
    const variableDefinitions = useMemo(() => getTargetDefinitions(targetType, userVariableDefinitions, furniVariableDefinitions, roomVariableDefinitions, contextVariableDefinitions), [ contextVariableDefinitions, furniVariableDefinitions, roomVariableDefinitions, targetType, userVariableDefinitions ]);
    const variableEntries = useMemo(() => buildCustomVariableEntries(targetType, variableDefinitions), [ targetType, variableDefinitions ]);
    const resolvedVariableEntries = useMemo(() =>
    {
        if(!variableToken) return variableEntries;
        if(flattenWiredVariablePickerEntries(variableEntries).some(entry => (entry.token === variableToken))) return variableEntries;

        const fallbackEntry = createFallbackVariableEntry(targetType, variableToken);
        return fallbackEntry ? [ fallbackEntry, ...variableEntries ] : variableEntries;
    }, [ targetType, variableEntries, variableToken ]);
    const sourceOptions = useMemo(() =>
    {
        switch(targetType)
        {
            case 'furni': return orderedFurniSources;
            case 'global': return GLOBAL_SOURCE_OPTIONS;
            case 'context': return CONTEXT_SOURCE_OPTIONS;
            default: return orderedUserSources;
        }
    }, [ orderedFurniSources, orderedUserSources, targetType ]);

    const sourceValue = (targetType === 'furni') ? furniSource : ((targetType === 'user') ? userSource : SOURCE_TRIGGER);
    const requiresFurni = ((targetType === 'furni') && (furniSource === SOURCE_SELECTED)) ? WiredFurniType.STUFF_SELECTION_OPTION_BY_ID : WiredFurniType.STUFF_SELECTION_OPTION_NONE;
    const selectionLimit = trigger?.maximumItemSelectionCount ?? 0;

    useEffect(() =>
    {
        if(!trigger) return;

        const intData = trigger.intData || [];
        const nextTargetType = normalizeTargetType((intData.length > 0) ? intData[0] : TARGET_USER);

        setTargetType(nextTargetType);
        setVariableToken(normalizeVariableTokenFromWire(trigger.stringData || ''));
        setCompareValue(((intData.length > 1) && (intData[1] === COMPARE_VALUE_UPDATED)) ? COMPARE_VALUE_UPDATED : COMPARE_VALUE_CREATED);
        setComparison(((intData.length > 2) && (intData[2] === COMPARISON_HIGHER_THAN)) ? COMPARISON_HIGHER_THAN : COMPARISON_LOWER_THAN);
        setDurationInput(String((intData.length > 3) ? intData[3] : 0));
        setDurationUnit((intData.length > 4) ? intData[4] : 1);
        setUserSource((intData.length > 5) ? intData[5] : SOURCE_TRIGGER);
        setFurniSource((intData.length > 6) ? intData[6] : (((trigger.selectedItems?.length ?? 0) > 0) ? SOURCE_SELECTED : SOURCE_TRIGGER));
        setQuantifier(((intData.length > 7) && (intData[7] === QUANTIFIER_ANY)) ? QUANTIFIER_ANY : QUANTIFIER_ALL);
    }, [ trigger ]);

    useEffect(() =>
    {
        if(targetType !== 'user') return;
        if(orderedUserSources.some(option => (option.value === userSource))) return;

        setUserSource(SOURCE_TRIGGER);
    }, [ orderedUserSources, targetType, userSource ]);

    useEffect(() =>
    {
        if(targetType !== 'global') return;
        if(compareValue === COMPARE_VALUE_UPDATED) return;

        setCompareValue(COMPARE_VALUE_UPDATED);
    }, [ targetType, compareValue ]);

    const save = () =>
    {
        const parsedDuration = parseInt(durationInput.trim(), 10);

        setStringParam(variableToken);
        setIntParams([
            getTargetValue(targetType),
            compareValue,
            comparison,
            Number.isFinite(parsedDuration) ? Math.max(0, parsedDuration) : 0,
            durationUnit,
            userSource,
            furniSource,
            quantifier
        ]);

        if(requiresFurni <= WiredFurniType.STUFF_SELECTION_OPTION_NONE) setFurniIds([]);
    };

    const validate = () =>
    {
        if(!variableToken.length) return false;
        if((targetType === 'global') && (compareValue !== COMPARE_VALUE_UPDATED)) return false;

        return true;
    };

    const handleTargetChange = (nextTargetType: VariableTargetType) =>
    {
        if(nextTargetType === targetType) return;

        setTargetType(nextTargetType);
        setVariableToken('');
    };

    return (
        <WiredConditionBaseView
            hasSpecialInput={ true }
            requiresFurni={ requiresFurni }
            save={ save }
            validate={ validate }
            cardStyle={ { width: 244 } }
            footerCollapsible={ false }
            footer={ (
                <div className="flex flex-col gap-2">
                    <div className="flex flex-col gap-1">
                        <Text bold>{ LocalizeText('wiredfurni.params.quantifier_selection') }</Text>
                        { [ QUANTIFIER_ALL, QUANTIFIER_ANY ].map(value => (
                            <label key={ value } className="flex items-center gap-1">
                                <input checked={ (quantifier === value) } className="form-check-input" name="wiredConditionVariableAgeQuantifier" type="radio" onChange={ () => setQuantifier(value) } />
                                <Text>{ LocalizeText(`wiredfurni.params.quantifier.variables.${ value }`) }</Text>
                            </label>
                        )) }
                    </div>
                    <WiredFurniSelectionSourceRow
                        title={ getSourceTitle() }
                        titleIsLiteral={ true }
                        options={ sourceOptions }
                        value={ sourceValue }
                        selectionKind="primary"
                        selectionActive={ requiresFurni > WiredFurniType.STUFF_SELECTION_OPTION_NONE }
                        selectionCount={ furniIds.length }
                        selectionLimit={ selectionLimit }
                        selectionEnabledValues={ [ SOURCE_SELECTED ] }
                        showSelectionToggle={ false }
                        onChange={ value =>
                        {
                            if(targetType === 'furni')
                            {
                                setFurniSource(value);
                                return;
                            }

                            if(targetType === 'user')
                            {
                                setUserSource(value);
                            }
                        } } />
                </div>
            ) }>
            <div className="nitro-wired__give-var">
                <div className="nitro-wired__give-var-heading">
                    <Text>{ LocalizeText('wiredfurni.params.variables.variable_selection') }</Text>
                    <div className="nitro-wired__give-var-targets">
                        { TARGET_BUTTONS.map(button => (
                            <button
                                key={ button.key }
                                type="button"
                                disabled={ button.disabled }
                                className={ `nitro-wired__give-var-target nitro-wired__give-var-target--${ button.key } ${ targetType === button.key ? 'is-active' : '' }` }
                                onClick={ () => handleTargetChange(button.key) }>
                                <img src={ button.icon } alt={ button.key } />
                            </button>
                        )) }
                    </div>
                </div>

                <WiredVariablePicker
                    entries={ resolvedVariableEntries }
                    recentScope="variable-conditions"
                    selectedToken={ variableToken }
                    onSelect={ entry => setVariableToken(entry.token) } />

                <div className="nitro-wired__divider" />

                <div className="nitro-wired__give-var-section">
                    <div className="nitro-wired__give-var-section-title">{ LocalizeText('wiredfurni.params.variables.compare_value') }</div>
                    { COMPARE_VALUE_OPTIONS.map(value => (
                        <label key={ value } className="flex items-center gap-1">
                            <input
                                checked={ compareValue === value }
                                className="form-check-input"
                                disabled={ (targetType === 'global') && (value === COMPARE_VALUE_CREATED) }
                                name="wiredConditionVariableAgeCompareValue"
                                type="radio"
                                onChange={ () => setCompareValue(value) } />
                            <Text>{ LocalizeText(`wiredfurni.params.variables.compare_value.${ value }`) }</Text>
                        </label>
                    )) }
                </div>

                <div className="nitro-wired__divider" />

                <div className="nitro-wired__give-var-section">
                    <div className="nitro-wired__give-var-section-title">{ LocalizeText('wiredfurni.params.choose_type') }</div>
                    { COMPARISON_OPTIONS.map(value => (
                        <label key={ value } className="flex items-center gap-1">
                            <input checked={ comparison === value } className="form-check-input" name="wiredConditionVariableAgeComparison" type="radio" onChange={ () => setComparison(value) } />
                            <Text>{ LocalizeText(`wiredfurni.params.comparison.${ value }`) }</Text>
                        </label>
                    )) }
                </div>

                <div className="nitro-wired__divider" />

                <div className="nitro-wired__give-var-section">
                    <div className="nitro-wired__give-var-section-title">{ LocalizeText('wiredfurni.params.variables.time_selection') }</div>
                    <div className="flex items-center gap-2">
                        <Text>{ LocalizeText('wiredfurni.params.variables.duration') }</Text>
                        <NitroInput className="nitro-wired__give-var-number" type="number" value={ durationInput } onChange={ event => setDurationInput(event.target.value) } />
                        <select
                            className="min-w-0 flex-1 rounded border border-[#b8b2a4] bg-white px-2 py-[3px] text-[12px]"
                            value={ durationUnit }
                            onChange={ event => setDurationUnit(Number(event.target.value)) }>
                            { DURATION_UNITS.map(unit => (
                                <option key={ unit } value={ unit }>
                                    { LocalizeText(`wiredfurni.params.variables.duration.${ unit }`) }
                                </option>
                            )) }
                        </select>
                    </div>
                </div>
            </div>
        </WiredConditionBaseView>
    );
};