import {DiagramEntity, DiagramEntityType, DiagramTemplates} from "../../diagram/types/diagramEntity";
import {
    ClearDiagramParams,
    COLOR_NAME_TO_HEX,
    ConnectEntitiesParams,
    CreateEntityParams,
    ModifyEntityParams,
    RemoveEntityParams,
    SHAPE_TO_TEMPLATE,
    ToolResult
} from "../types/chatTypes";
import {v4 as uuidv4} from 'uuid';
import log from 'loglevel';

const logger = log.getLogger('entityBridge');
logger.setLevel('debug');

function resolveColor(color?: string): string {
    if (!color) return '#0000ff';
    const lower = color.toLowerCase();
    if (COLOR_NAME_TO_HEX[lower]) {
        return COLOR_NAME_TO_HEX[lower];
    }
    if (color.startsWith('#')) {
        return color;
    }
    return '#0000ff';
}

interface ResolvedEntity {
    id: string | null;
    label: string | null;
}

/**
 * Resolve an entity label or ID to actual entity ID and label
 */
function resolveEntity(target: string): Promise<ResolvedEntity> {
    logger.debug('[resolveEntity] Resolving:', target);
    return new Promise((resolve) => {
        const requestId = 'req-' + Date.now() + '-' + Math.random();

        const responseHandler = (e: CustomEvent) => {
            if (e.detail.requestId !== requestId) return;
            logger.debug('[resolveEntity] Got response:', e.detail);
            document.removeEventListener('chatResolveEntityResponse', responseHandler as EventListener);
            resolve({
                id: e.detail.entityId,
                label: e.detail.entityLabel
            });
        };

        document.addEventListener('chatResolveEntityResponse', responseHandler as EventListener);

        const event = new CustomEvent('chatResolveEntity', {
            detail: {target, requestId},
            bubbles: true
        });
        document.dispatchEvent(event);

        setTimeout(() => {
            logger.warn('[resolveEntity] Timeout resolving:', target);
            document.removeEventListener('chatResolveEntityResponse', responseHandler as EventListener);
            resolve({id: null, label: null});
        }, 5000);
    });
}

export function createEntity(params: CreateEntityParams): ToolResult {
    logger.debug('[createEntity] Creating entity:', params);
    const id = 'id' + uuidv4();
    const template = SHAPE_TO_TEMPLATE[params.shape];
    const color = resolveColor(params.color);
    const position = params.position || {x: 0, y: 1.5, z: 2};

    const entity: DiagramEntity = {
        id,
        template,
        type: DiagramEntityType.ENTITY,
        color,
        text: params.label || '',
        position,
        rotation: {x: 0, y: Math.PI, z: 0},
        scale: {x: 0.1, y: 0.1, z: 0.1},
    };

    logger.debug('[createEntity] Dispatching chatCreateEntity event:', entity);
    const event = new CustomEvent('chatCreateEntity', {
        detail: {entity},
        bubbles: true
    });
    document.dispatchEvent(event);

    const result = {
        toolName: 'create_entity',
        success: true,
        message: `Created ${params.shape}${params.label ? ` labeled "${params.label}"` : ''} at position (${position.x.toFixed(1)}, ${position.y.toFixed(1)}, ${position.z.toFixed(1)})`,
        entityId: id
    };
    logger.debug('[createEntity] Done:', result);
    return result;
}

export async function connectEntities(params: ConnectEntitiesParams): Promise<ToolResult> {
    logger.debug('[connectEntities] Connecting:', params);
    // Resolve labels to actual entity IDs and get their labels
    const fromEntity = await resolveEntity(params.from);
    const toEntity = await resolveEntity(params.to);
    logger.debug('[connectEntities] Resolved from:', fromEntity, 'to:', toEntity);

    if (!fromEntity.id) {
        return {
            toolName: 'connect_entities',
            success: false,
            message: `Could not find entity "${params.from}"`
        };
    }

    if (!toEntity.id) {
        return {
            toolName: 'connect_entities',
            success: false,
            message: `Could not find entity "${params.to}"`
        };
    }

    const id = 'id' + uuidv4();
    const color = resolveColor(params.color);

    // Generate default label from entity labels: "{from label} to {to label}"
    const fromLabel = fromEntity.label || params.from;
    const toLabel = toEntity.label || params.to;
    const connectionLabel = `${fromLabel} to ${toLabel}`;

    const entity: DiagramEntity = {
        id,
        template: DiagramTemplates.CONNECTION,
        type: DiagramEntityType.ENTITY,
        color,
        text: connectionLabel,
        from: fromEntity.id,
        to: toEntity.id,
    };

    const event = new CustomEvent('chatCreateEntity', {
        detail: {entity},
        bubbles: true
    });
    document.dispatchEvent(event);

    return {
        toolName: 'connect_entities',
        success: true,
        message: `Connected "${fromLabel}" to "${toLabel}"`,
        entityId: id
    };
}

export function removeEntity(params: RemoveEntityParams): ToolResult {
    const event = new CustomEvent('chatRemoveEntity', {
        detail: {target: params.target},
        bubbles: true
    });
    document.dispatchEvent(event);

    return {
        toolName: 'remove_entity',
        success: true,
        message: `Removed entity "${params.target}"`
    };
}

export function modifyEntity(params: ModifyEntityParams): ToolResult {
    const updates: Partial<DiagramEntity> = {};

    if (params.color) {
        updates.color = resolveColor(params.color);
    }
    if (params.label !== undefined) {
        updates.text = params.label;
    }
    if (params.position) {
        updates.position = params.position;
    }

    const event = new CustomEvent('chatModifyEntity', {
        detail: {target: params.target, updates},
        bubbles: true
    });
    document.dispatchEvent(event);

    return {
        toolName: 'modify_entity',
        success: true,
        message: `Modified entity "${params.target}"`
    };
}

export function listEntities(): Promise<ToolResult> {
    logger.debug('[listEntities] Listing entities...');
    return new Promise((resolve) => {
        const responseHandler = (e: CustomEvent) => {
            document.removeEventListener('chatListEntitiesResponse', responseHandler as EventListener);
            const entities = e.detail.entities as Array<{
                id: string;
                template: string;
                text: string;
                position: { x: number; y: number; z: number }
            }>;
            logger.debug('[listEntities] Got response, entities:', entities.length);

            if (entities.length === 0) {
                resolve({
                    toolName: 'list_entities',
                    success: true,
                    message: 'The diagram is empty.'
                });
                return;
            }

            const list = entities.map(e => {
                const shape = e.template.replace('#', '').replace('-template', '');
                return `- ${e.text || '(no label)'} (${shape}) at (${e.position?.x?.toFixed(1) || 0}, ${e.position?.y?.toFixed(1) || 0}, ${e.position?.z?.toFixed(1) || 0}) [id: ${e.id}]`;
            }).join('\n');

            resolve({
                toolName: 'list_entities',
                success: true,
                message: `Current entities in the diagram:\n${list}`
            });
        };

        document.addEventListener('chatListEntitiesResponse', responseHandler as EventListener);

        const event = new CustomEvent('chatListEntities', {bubbles: true});
        document.dispatchEvent(event);

        setTimeout(() => {
            logger.warn('[listEntities] Timeout waiting for response');
            document.removeEventListener('chatListEntitiesResponse', responseHandler as EventListener);
            resolve({
                toolName: 'list_entities',
                success: false,
                message: 'Failed to list entities (timeout)'
            });
        }, 5000);
    });
}

/**
 * Get all entities for session syncing (returns raw entity data)
 */
export function getEntitiesForSync(): Promise<Array<{
    id: string;
    template: string;
    text?: string;
    color?: string;
    position?: { x: number; y: number; z: number };
}>> {
    return new Promise((resolve) => {
        const responseHandler = (e: CustomEvent) => {
            document.removeEventListener('chatListEntitiesResponse', responseHandler as EventListener);
            resolve(e.detail.entities || []);
        };

        document.addEventListener('chatListEntitiesResponse', responseHandler as EventListener);

        const event = new CustomEvent('chatListEntities', {bubbles: true});
        document.dispatchEvent(event);

        setTimeout(() => {
            document.removeEventListener('chatListEntitiesResponse', responseHandler as EventListener);
            resolve([]);
        }, 5000);
    });
}

/**
 * Clear all entities from the diagram
 */
export async function clearDiagram(params: ClearDiagramParams): Promise<ToolResult> {
    if (!params.confirmed) {
        return {
            toolName: 'clear_diagram',
            success: false,
            message: 'Clearing the diagram requires confirmation. Please ask the user to confirm before proceeding.'
        };
    }

    // Get all entities first
    const entities = await getEntitiesForSync();

    if (entities.length === 0) {
        return {
            toolName: 'clear_diagram',
            success: true,
            message: 'The diagram is already empty.'
        };
    }

    // Dispatch clear event to remove all entities at once
    const event = new CustomEvent('chatClearDiagram', {
        bubbles: true
    });
    document.dispatchEvent(event);

    return {
        toolName: 'clear_diagram',
        success: true,
        message: `Cleared ${entities.length} entities from the diagram.`
    };
}

/**
 * Get the current camera position and orientation
 */
export function getCameraPosition(): Promise<ToolResult> {
    logger.debug('[getCameraPosition] Getting camera position...');
    return new Promise((resolve) => {
        const responseHandler = (e: CustomEvent) => {
            document.removeEventListener('chatGetCameraResponse', responseHandler as EventListener);
            const {position, forward, up} = e.detail;
            logger.debug('[getCameraPosition] Got response:', e.detail);

            const message = `Camera position: (${position.x.toFixed(2)}, ${position.y.toFixed(2)}, ${position.z.toFixed(2)})
Forward direction: (${forward.x.toFixed(2)}, ${forward.y.toFixed(2)}, ${forward.z.toFixed(2)})
Up direction: (${up.x.toFixed(2)}, ${up.y.toFixed(2)}, ${up.z.toFixed(2)})

To place an entity in front of the camera, add the forward direction scaled by desired distance to the camera position.
Example: For an entity 2 units in front: position = (${(position.x + forward.x * 2).toFixed(2)}, ${(position.y + forward.y * 2).toFixed(2)}, ${(position.z + forward.z * 2).toFixed(2)})`;

            resolve({
                toolName: 'get_camera_position',
                success: true,
                message
            });
        };

        document.addEventListener('chatGetCameraResponse', responseHandler as EventListener);

        const event = new CustomEvent('chatGetCamera', {bubbles: true});
        document.dispatchEvent(event);

        setTimeout(() => {
            logger.warn('[getCameraPosition] Timeout waiting for response');
            document.removeEventListener('chatGetCameraResponse', responseHandler as EventListener);
            resolve({
                toolName: 'get_camera_position',
                success: false,
                message: 'Failed to get camera position (timeout)'
            });
        }, 5000);
    });
}