import { useState, useEffect } from 'react';
import { Entity } from '@esengine/ecs-framework';
import { EntityStoreService, MessageHub } from '@esengine/editor-core';
import { PropertyInspector } from './PropertyInspector';
import { FileSearch, ChevronDown, ChevronRight, X, Settings } from 'lucide-react';
import '../styles/EntityInspector.css';

interface EntityInspectorProps {
  entityStore: EntityStoreService;
  messageHub: MessageHub;
}

export function EntityInspector({ entityStore: _entityStore, messageHub }: EntityInspectorProps) {
    const [selectedEntity, setSelectedEntity] = useState<Entity | null>(null);
    const [remoteEntity, setRemoteEntity] = useState<any | null>(null);
    const [remoteEntityDetails, setRemoteEntityDetails] = useState<any | null>(null);
    const [expandedComponents, setExpandedComponents] = useState<Set<number>>(new Set());
    const [componentVersion, setComponentVersion] = useState(0);

    useEffect(() => {
        const handleSelection = (data: { entity: Entity | null }) => {
            setSelectedEntity((prev) => {
                // Only reset version when selecting a different entity
                // 只在选择不同实体时重置版本
                if (prev?.id !== data.entity?.id) {
                    setComponentVersion(0);
                } else {
                    // Same entity re-selected, trigger refresh
                    // 同一实体重新选择，触发刷新
                    setComponentVersion((v) => v + 1);
                }
                return data.entity;
            });
            setRemoteEntity(null);
            setRemoteEntityDetails(null);
        };

        const handleRemoteSelection = (data: { entity: any }) => {
            setRemoteEntity(data.entity);
            setRemoteEntityDetails(null);
            setSelectedEntity(null);
        };

        const handleEntityDetails = (event: Event) => {
            const customEvent = event as CustomEvent;
            const details = customEvent.detail;
            setRemoteEntityDetails(details);
        };

        const handleComponentChange = () => {
            setComponentVersion((prev) => prev + 1);
        };

        const unsubSelect = messageHub.subscribe('entity:selected', handleSelection);
        const unsubRemoteSelect = messageHub.subscribe('remote-entity:selected', handleRemoteSelection);
        const unsubComponentAdded = messageHub.subscribe('component:added', handleComponentChange);
        const unsubComponentRemoved = messageHub.subscribe('component:removed', handleComponentChange);
        const unsubPropertyChanged = messageHub.subscribe('component:property:changed', handleComponentChange);

        window.addEventListener('profiler:entity-details', handleEntityDetails);

        return () => {
            unsubSelect();
            unsubRemoteSelect();
            unsubComponentAdded();
            unsubComponentRemoved();
            unsubPropertyChanged();
            window.removeEventListener('profiler:entity-details', handleEntityDetails);
        };
    }, [messageHub]);

    const handleRemoveComponent = (index: number) => {
        if (!selectedEntity) return;
        const component = selectedEntity.components[index];
        if (component) {
            selectedEntity.removeComponent(component);
            messageHub.publish('component:removed', { entity: selectedEntity, component });
        }
    };

    const toggleComponentExpanded = (index: number) => {
        setExpandedComponents((prev) => {
            const newSet = new Set(prev);
            if (newSet.has(index)) {
                newSet.delete(index);
            } else {
                newSet.add(index);
            }
            return newSet;
        });
    };

    const handlePropertyChange = (component: any, propertyName: string, value: any) => {
        if (!selectedEntity) return;

        // Actually update the component property
        // 实际更新组件属性
        component[propertyName] = value;

        messageHub.publish('component:property:changed', {
            entity: selectedEntity,
            component,
            propertyName,
            value
        });
    };

    const renderRemoteProperty = (key: string, value: any) => {
        if (value === null || value === undefined) {
            return (
                <div key={key} className="property-field">
                    <label className="property-label">{key}</label>
                    <span className="property-value-text">null</span>
                </div>
            );
        }

        if (Array.isArray(value)) {
            return (
                <div key={key} className="property-field">
                    <label className="property-label">{key}</label>
                    <div style={{ flex: 1, display: 'flex', flexWrap: 'wrap', gap: '4px' }}>
                        {value.length === 0 ? (
                            <span className="property-value-text" style={{ opacity: 0.5 }}>Empty Array</span>
                        ) : (
                            value.map((item, index) => (
                                <span
                                    key={index}
                                    style={{
                                        padding: '2px 6px',
                                        background: 'var(--color-bg-inset)',
                                        border: '1px solid var(--color-border-default)',
                                        borderRadius: '3px',
                                        fontSize: '10px',
                                        color: 'var(--color-text-primary)',
                                        fontFamily: 'var(--font-family-mono)'
                                    }}
                                >
                                    {typeof item === 'object' ? JSON.stringify(item) : String(item)}
                                </span>
                            ))
                        )}
                    </div>
                </div>
            );
        }

        const valueType = typeof value;

        if (valueType === 'boolean') {
            return (
                <div key={key} className="property-field property-field-boolean">
                    <label className="property-label">{key}</label>
                    <div className={`property-toggle ${value ? 'property-toggle-on' : 'property-toggle-off'} property-toggle-readonly`}>
                        <span className="property-toggle-thumb" />
                    </div>
                </div>
            );
        }

        if (valueType === 'number') {
            return (
                <div key={key} className="property-field">
                    <label className="property-label">{key}</label>
                    <input
                        type="number"
                        className="property-input property-input-number"
                        value={value}
                        disabled
                    />
                </div>
            );
        }

        if (valueType === 'string') {
            return (
                <div key={key} className="property-field">
                    <label className="property-label">{key}</label>
                    <input
                        type="text"
                        className="property-input property-input-text"
                        value={value}
                        disabled
                    />
                </div>
            );
        }

        if (valueType === 'object' && value.r !== undefined && value.g !== undefined && value.b !== undefined) {
            const r = Math.round(value.r * 255);
            const g = Math.round(value.g * 255);
            const b = Math.round(value.b * 255);
            const a = value.a !== undefined ? value.a : 1;
            const hexColor = `#${r.toString(16).padStart(2, '0')}${g.toString(16).padStart(2, '0')}${b.toString(16).padStart(2, '0')}`;

            return (
                <div key={key} className="property-field">
                    <label className="property-label">{key}</label>
                    <div className="property-color-wrapper">
                        <div className="property-color-preview" style={{ backgroundColor: hexColor, opacity: a }} />
                        <input
                            type="text"
                            className="property-input property-input-color-text"
                            value={`${hexColor.toUpperCase()} (${a.toFixed(2)})`}
                            disabled
                            style={{ flex: 1 }}
                        />
                    </div>
                </div>
            );
        }

        if (valueType === 'object' && value.minX !== undefined && value.maxX !== undefined && value.minY !== undefined && value.maxY !== undefined) {
            return (
                <div key={key} className="property-field" style={{ flexDirection: 'column', alignItems: 'stretch' }}>
                    <label className="property-label" style={{ flex: 'none', marginBottom: '4px' }}>{key}</label>
                    <div style={{ display: 'flex', flexDirection: 'column', gap: '4px' }}>
                        <div className="property-vector-compact">
                            <div className="property-vector-axis-compact">
                                <span className="property-vector-axis-label property-vector-axis-x">X</span>
                                <input
                                    type="number"
                                    className="property-input property-input-number-compact"
                                    value={value.minX}
                                    disabled
                                    placeholder="Min"
                                />
                            </div>
                            <div className="property-vector-axis-compact">
                                <span className="property-vector-axis-label property-vector-axis-x">X</span>
                                <input
                                    type="number"
                                    className="property-input property-input-number-compact"
                                    value={value.maxX}
                                    disabled
                                    placeholder="Max"
                                />
                            </div>
                        </div>
                        <div className="property-vector-compact">
                            <div className="property-vector-axis-compact">
                                <span className="property-vector-axis-label property-vector-axis-y">Y</span>
                                <input
                                    type="number"
                                    className="property-input property-input-number-compact"
                                    value={value.minY}
                                    disabled
                                    placeholder="Min"
                                />
                            </div>
                            <div className="property-vector-axis-compact">
                                <span className="property-vector-axis-label property-vector-axis-y">Y</span>
                                <input
                                    type="number"
                                    className="property-input property-input-number-compact"
                                    value={value.maxY}
                                    disabled
                                    placeholder="Max"
                                />
                            </div>
                        </div>
                    </div>
                </div>
            );
        }

        if (valueType === 'object' && value.x !== undefined && value.y !== undefined) {
            if (value.z !== undefined) {
                return (
                    <div key={key} className="property-field">
                        <label className="property-label">{key}</label>
                        <div className="property-vector-compact">
                            <div className="property-vector-axis-compact">
                                <span className="property-vector-axis-label property-vector-axis-x">X</span>
                                <input
                                    type="number"
                                    className="property-input property-input-number-compact"
                                    value={value.x}
                                    disabled
                                />
                            </div>
                            <div className="property-vector-axis-compact">
                                <span className="property-vector-axis-label property-vector-axis-y">Y</span>
                                <input
                                    type="number"
                                    className="property-input property-input-number-compact"
                                    value={value.y}
                                    disabled
                                />
                            </div>
                            <div className="property-vector-axis-compact">
                                <span className="property-vector-axis-label property-vector-axis-z">Z</span>
                                <input
                                    type="number"
                                    className="property-input property-input-number-compact"
                                    value={value.z}
                                    disabled
                                />
                            </div>
                        </div>
                    </div>
                );
            } else {
                return (
                    <div key={key} className="property-field">
                        <label className="property-label">{key}</label>
                        <div className="property-vector-compact">
                            <div className="property-vector-axis-compact">
                                <span className="property-vector-axis-label property-vector-axis-x">X</span>
                                <input
                                    type="number"
                                    className="property-input property-input-number-compact"
                                    value={value.x}
                                    disabled
                                />
                            </div>
                            <div className="property-vector-axis-compact">
                                <span className="property-vector-axis-label property-vector-axis-y">Y</span>
                                <input
                                    type="number"
                                    className="property-input property-input-number-compact"
                                    value={value.y}
                                    disabled
                                />
                            </div>
                        </div>
                    </div>
                );
            }
        }

        return (
            <div key={key} className="property-field">
                <label className="property-label">{key}</label>
                <span className="property-value-text">{JSON.stringify(value)}</span>
            </div>
        );
    };

    if (!selectedEntity && !remoteEntity) {
        return (
            <div className="entity-inspector">
                <div className="inspector-header">
                    <FileSearch size={16} className="inspector-header-icon" />
                    <h3>Inspector</h3>
                </div>
                <div className="inspector-content">
                    <div className="empty-state">
                        <FileSearch size={48} strokeWidth={1.5} className="empty-icon" />
                        <div className="empty-title">No entity selected</div>
                        <div className="empty-hint">Select an entity from the hierarchy</div>
                    </div>
                </div>
            </div>
        );
    }

    // 显示远程实体
    if (remoteEntity) {
        const displayData = remoteEntityDetails || remoteEntity;
        const hasDetailedComponents = remoteEntityDetails && remoteEntityDetails.components && remoteEntityDetails.components.length > 0;

        return (
            <div className="entity-inspector">
                <div className="inspector-header">
                    <FileSearch size={16} className="inspector-header-icon" />
                    <h3>Inspector</h3>
                </div>
                <div className="inspector-content scrollable">
                    <div className="inspector-section">
                        <div className="section-header">
                            <Settings size={12} className="section-icon" />
                            <span>Entity Info (Remote)</span>
                        </div>
                        <div className="section-content">
                            <div className="info-row">
                                <span className="info-label">ID:</span>
                                <span className="info-value">{displayData.id}</span>
                            </div>
                            <div className="info-row">
                                <span className="info-label">Name:</span>
                                <span className="info-value">{displayData.name}</span>
                            </div>
                            <div className="info-row">
                                <span className="info-label">Enabled:</span>
                                <span className="info-value">{displayData.enabled ? 'Yes' : 'No'}</span>
                            </div>
                            {displayData.scene && (
                                <div className="info-row">
                                    <span className="info-label">Scene:</span>
                                    <span className="info-value">{displayData.scene}</span>
                                </div>
                            )}
                        </div>
                    </div>

                    <div className="inspector-section">
                        <div className="section-header">
                            <Settings size={12} className="section-icon" />
                            <span>Components ({displayData.componentCount})</span>
                        </div>
                        <div className="section-content">
                            {hasDetailedComponents ? (
                                <ul className="component-list">
                                    {remoteEntityDetails!.components.map((component: any, index: number) => {
                                        const isExpanded = expandedComponents.has(index);
                                        return (
                                            <li key={index} className={`component-item ${isExpanded ? 'expanded' : ''}`}>
                                                <div className="component-header" onClick={() => toggleComponentExpanded(index)}>
                                                    <button
                                                        className="component-expand-btn"
                                                        title={isExpanded ? 'Collapse' : 'Expand'}
                                                    >
                                                        {isExpanded ? <ChevronDown size={14} /> : <ChevronRight size={14} />}
                                                    </button>
                                                    <Settings size={14} className="component-icon" />
                                                    <span className="component-name">{component.typeName}</span>
                                                </div>
                                                {isExpanded && (
                                                    <div className="component-properties animate-slideDown">
                                                        <div className="property-inspector">
                                                            {Object.entries(component.properties).map(([key, value]) =>
                                                                renderRemoteProperty(key, value)
                                                            )}
                                                        </div>
                                                    </div>
                                                )}
                                            </li>
                                        );
                                    })}
                                </ul>
                            ) : displayData.componentTypes && displayData.componentTypes.length > 0 ? (
                                <ul className="component-list">
                                    {displayData.componentTypes.map((componentType: string, index: number) => (
                                        <li key={index} className="component-item">
                                            <div className="component-header">
                                                <Settings size={14} className="component-icon" />
                                                <span className="component-name">{componentType}</span>
                                            </div>
                                        </li>
                                    ))}
                                </ul>
                            ) : (
                                <div className="empty-state-small">No components</div>
                            )}
                        </div>
                    </div>
                </div>
            </div>
        );
    }

    const components = selectedEntity!.components;

    return (
        <div className="entity-inspector">
            <div className="inspector-header">
                <FileSearch size={16} className="inspector-header-icon" />
                <h3>Inspector</h3>
            </div>
            <div className="inspector-content scrollable">
                <div className="inspector-section">
                    <div className="section-header">
                        <Settings size={12} className="section-icon" />
                        <span>Entity Info</span>
                    </div>
                    <div className="section-content">
                        <div className="info-row">
                            <span className="info-label">ID:</span>
                            <span className="info-value">{selectedEntity!.id}</span>
                        </div>
                        <div className="info-row">
                            <span className="info-label">Name:</span>
                            <span className="info-value">Entity {selectedEntity!.id}</span>
                        </div>
                        <div className="info-row">
                            <span className="info-label">Enabled:</span>
                            <span className="info-value">{selectedEntity!.enabled ? 'Yes' : 'No'}</span>
                        </div>
                    </div>
                </div>

                <div className="inspector-section">
                    <div className="section-header">
                        <Settings size={12} className="section-icon" />
                        <span>Components ({components.length})</span>
                    </div>
                    <div className="section-content">
                        {components.length === 0 ? (
                            <div className="empty-state-small">No components</div>
                        ) : (
                            <ul className="component-list" key={componentVersion}>
                                {components.map((component, index) => {
                                    const isExpanded = expandedComponents.has(index);
                                    return (
                                        <li key={index} className={`component-item ${isExpanded ? 'expanded' : ''}`}>
                                            <div className="component-header" onClick={() => toggleComponentExpanded(index)}>
                                                <button
                                                    className="component-expand-btn"
                                                    title={isExpanded ? 'Collapse' : 'Expand'}
                                                >
                                                    {isExpanded ? <ChevronDown size={14} /> : <ChevronRight size={14} />}
                                                </button>
                                                <Settings size={14} className="component-icon" />
                                                <span className="component-name">{component.constructor.name}</span>
                                                <button
                                                    className="remove-component-btn"
                                                    onClick={(e) => {
                                                        e.stopPropagation();
                                                        handleRemoveComponent(index);
                                                    }}
                                                    title="Remove Component"
                                                >
                                                    <X size={14} />
                                                </button>
                                            </div>
                                            {isExpanded && (
                                                <div className="component-properties animate-slideDown">
                                                    <PropertyInspector
                                                        key={`${index}-${componentVersion}`}
                                                        component={component}
                                                        onChange={(propertyName, value) => handlePropertyChange(component, propertyName, value)}
                                                    />
                                                </div>
                                            )}
                                        </li>
                                    );
                                })}
                            </ul>
                        )}
                    </div>
                </div>
            </div>
        </div>
    );
}