import * as fs from 'fs/promises';
import * as path from 'path';
import { SAFE_DESKTOP_PATH, listSafeFiles } from './FileSystemTools.js';

// Handlers
async function handleReadAgentMessages(args: any) {
    const agent = args?.agent || 'claude';
    const inboxPath = path.join(SAFE_DESKTOP_PATH, 'agents', agent, 'inbox');

    try {
        const files = await listSafeFiles(inboxPath, false);
        const messages: any[] = [];

        for (const file of files) {
            if (file.type === '.json') {
                try {
                    const content = await fs.readFile(
                        path.join(inboxPath, file.name), 
                        'utf-8'
                    );
                    messages.push(JSON.parse(content));
                } catch {
                    // Skip invalid JSON
                }
            }
        }

        return {
            content: [{
                type: 'text',
                text: JSON.stringify({
                    agent: agent,
                    inboxPath: inboxPath,
                    messageCount: messages.length,
                    messages: messages
                }, null, 2)
            }]
        };

    } catch (error: any) {
        return {
            content: [{
                type: 'text',
                text: JSON.stringify({
                    error: error.message,
                    hint: 'Agent inbox may not exist yet'
                }, null, 2)
            }]
        };
    }
}

async function handleSendAgentMessage(args: any) {
    const { to, type, subject, body, priority = 'normal' } = args;

    if (!to || !type || !subject || !body) {
        throw new Error('to, type, subject, and body are required');
    }

    const timestamp = new Date().toISOString();
    const messageId = `msg-${Date.now()}`;
    const filename = `${timestamp.replace(/[:.]/g, '-')}_claude_${to}_${type}.json`;

    const message = {
        id: messageId,
        timestamp: timestamp,
        from: 'claude',
        to: to,
        type: type,
        priority: priority,
        subject: subject,
        body: body,
        context: {
            session: 'neural-bridge',
            source: 'mcp-tool'
        },
        requires_response: type !== 'status' && type !== 'response'
    };

    // Write to own outbox
    const outboxPath = path.join(SAFE_DESKTOP_PATH, 'agents', 'claude', 'outbox', filename);
    await fs.writeFile(outboxPath, JSON.stringify(message, null, 2));

    // Copy to recipient's inbox
    if (to !== 'human') {
        const recipientInbox = path.join(SAFE_DESKTOP_PATH, 'agents', to, 'inbox', filename);
        await fs.writeFile(recipientInbox, JSON.stringify(message, null, 2));
    }

    return {
        content: [{
            type: 'text',
            text: JSON.stringify({
                success: true,
                messageId: messageId,
                sentTo: to,
                filename: filename,
                message: `Message sent to ${to}`
            }, null, 2)
        }]
    };
}

async function handleNeuralChatSend(args: any) {
    const { channel, body, from, priority, type } = args;

    const { neuralChatService } = await import('../../services/NeuralChat/index.js');

    const message = await neuralChatService.sendMessage({
        channel: channel || 'core-dev',
        body,
        from: from || 'claude',
        priority: priority || 'normal',
        type: type || 'chat'
    });

    return {
        content: [{
            type: 'text',
            text: JSON.stringify({
                success: true,
                message
            }, null, 2)
        }]
    };
}

async function handleNeuralChatRead(args: any) {
    const { channel, limit, since } = args;

    const { neuralChatService } = await import('../../services/NeuralChat/index.js');

    const messages = await neuralChatService.getMessages({
        channel,
        limit: limit || 20,
        since
    });

    return {
        content: [{
            type: 'text',
            text: JSON.stringify({
                channel: channel || 'all',
                count: messages.length,
                messages
            }, null, 2)
        }]
    };
}

async function handleNeuralChatChannels(args: any) {
    const { neuralChatService } = await import('../../services/NeuralChat/index.js');
    const channels = neuralChatService.getChannels();

    return {
        content: [{
            type: 'text',
            text: JSON.stringify({
                count: channels.length,
                channels
            }, null, 2)
        }]
    };
}

async function handleListAgentCapabilities(args: any) {
    const { agent } = args;
    const { capabilityBroker, AGENT_CAPABILITIES } = await import('../../services/NeuralChat/CapabilityBroker.js');

    if (agent) {
        const capabilities = capabilityBroker.getAgentCapabilities(agent);
        return {
            content: [{
                type: 'text',
                text: JSON.stringify({ agent, capabilities }, null, 2)
            }]
        };
    }

    return {
        content: [{
            type: 'text',
            text: JSON.stringify({
                agents: Object.keys(AGENT_CAPABILITIES),
                capabilities: AGENT_CAPABILITIES
            }, null, 2)
        }]
    };
}

async function handleRequestCapability(args: any) {
    const { toAgent, capability, params, priority } = args;
    const { capabilityBroker } = await import('../../services/NeuralChat/CapabilityBroker.js');

    const request = await capabilityBroker.requestCapability({
        fromAgent: 'claude',
        toAgent,
        capability,
        params: params || {},
        priority: priority || 'normal'
    });

    return {
        content: [{
            type: 'text',
            text: JSON.stringify({
                success: true,
                request,
                message: `Capability request sent to ${toAgent}`
            }, null, 2)
        }]
    };
}

async function handleGetPendingRequests(args: any) {
    const { agent } = args;
    const { capabilityBroker } = await import('../../services/NeuralChat/CapabilityBroker.js');

    const requests = await capabilityBroker.getPendingRequests(agent);

    return {
        content: [{
            type: 'text',
            text: JSON.stringify({
                agent,
                pending: requests.length,
                requests
            }, null, 2)
        }]
    };
}

async function handleSmartRouteTask(args: any) {
    const { task, context } = args;
    const { capabilityBroker } = await import('../../services/NeuralChat/CapabilityBroker.js');

    const result = await capabilityBroker.smartRoute({
        task,
        context,
        fromAgent: 'claude'
    });

    if (result) {
        return {
            content: [{
                type: 'text',
                text: JSON.stringify({
                    success: true,
                    recommendation: {
                        agent: result.agent,
                        capability: result.capability.name,
                        confidence: `${(result.confidence * 100).toFixed(0)}%`,
                        description: result.capability.description
                    },
                    message: `Best match: ${result.agent} for "${result.capability.name}"`
                }, null, 2)
            }]
        };
    }

    return {
        content: [{
            type: 'text',
            text: JSON.stringify({
                success: false,
                message: 'No suitable agent found for this task'
            }, null, 2)
        }]
    };
}

export const AGENT_TOOLS = [
    {
        name: 'read_agent_messages',
        description: 'Read messages from the agent communication inbox',
        inputSchema: {
            type: 'object',
            properties: {
                agent: {
                    type: 'string',
                    enum: ['claude', 'gemini'],
                    description: 'Which agent inbox to read'
                },
                unreadOnly: {
                    type: 'boolean',
                    description: 'Only show unread messages'
                }
            }
        },
        handler: handleReadAgentMessages
    },
    {
        name: 'send_agent_message',
        description: 'Send a message to another agent via the communication protocol',
        inputSchema: {
            type: 'object',
            properties: {
                to: {
                    type: 'string',
                    enum: ['gemini', 'claude', 'human'],
                    description: 'Recipient agent'
                },
                type: {
                    type: 'string',
                    enum: ['response', 'task', 'question', 'status', 'alert'],
                    description: 'Message type'
                },
                subject: {
                    type: 'string',
                    description: 'Message subject'
                },
                body: {
                    type: 'string',
                    description: 'Message body'
                },
                priority: {
                    type: 'string',
                    enum: ['low', 'normal', 'high', 'critical'],
                    description: 'Message priority'
                }
            },
            required: ['to', 'type', 'subject', 'body']
        },
        handler: handleSendAgentMessage
    },
    {
        name: 'neural_chat_send',
        description: 'Send a message to a Neural Chat channel for real-time agent communication',
        inputSchema: {
            type: 'object',
            properties: {
                channel: {
                    type: 'string',
                    description: 'Channel to send to (core-dev, standup, alerts)'
                },
                body: {
                    type: 'string',
                    description: 'Message content'
                },
                from: {
                    type: 'string',
                    enum: ['claude', 'gemini', 'deepseek', 'clak', 'system'],
                    description: 'Sender agent'
                },
                priority: {
                    type: 'string',
                    enum: ['low', 'normal', 'high', 'critical'],
                    description: 'Message priority'
                },
                type: {
                    type: 'string',
                    enum: ['chat', 'task', 'status', 'alert', 'handover', 'response'],
                    description: 'Message type'
                }
            },
            required: ['channel', 'body', 'from']
        },
        handler: handleNeuralChatSend
    },
    {
        name: 'neural_chat_read',
        description: 'Read messages from Neural Chat channels',
        inputSchema: {
            type: 'object',
            properties: {
                channel: {
                    type: 'string',
                    description: 'Channel to read from (optional, reads all if not specified)'
                },
                limit: {
                    type: 'number',
                    description: 'Max messages to return (default: 20)'
                },
                since: {
                    type: 'string',
                    description: 'ISO timestamp to read messages since'
                }
            }
        },
        handler: handleNeuralChatRead
    },
    {
        name: 'neural_chat_channels',
        description: 'List all Neural Chat channels',
        inputSchema: {
            type: 'object',
            properties: {}
        },
        handler: handleNeuralChatChannels
    },
    {
        name: 'list_agent_capabilities',
        description: 'List capabilities of agents (what each agent is good at)',
        inputSchema: {
            type: 'object',
            properties: {
                agent: {
                    type: 'string',
                    enum: ['claude', 'gemini', 'deepseek', 'clak'],
                    description: 'Specific agent to list capabilities for (optional)'
                }
            }
        },
        handler: handleListAgentCapabilities
    },
    {
        name: 'request_capability',
        description: 'Request another agent to perform a task based on their capabilities',
        inputSchema: {
            type: 'object',
            properties: {
                toAgent: {
                    type: 'string',
                    enum: ['claude', 'gemini', 'deepseek', 'clak'],
                    description: 'Agent to request capability from'
                },
                capability: {
                    type: 'string',
                    description: 'Capability ID or name to request'
                },
                params: {
                    type: 'object',
                    description: 'Parameters for the capability request'
                },
                priority: {
                    type: 'string',
                    enum: ['low', 'normal', 'high', 'critical'],
                    description: 'Request priority'
                }
            },
            required: ['toAgent', 'capability']
        },
        handler: handleRequestCapability
    },
    {
        name: 'get_pending_requests',
        description: 'Get pending capability requests assigned to an agent',
        inputSchema: {
            type: 'object',
            properties: {
                agent: {
                    type: 'string',
                    enum: ['claude', 'gemini', 'deepseek', 'clak'],
                    description: 'Agent to check pending requests for'
                }
            },
            required: ['agent']
        },
        handler: handleGetPendingRequests
    },
    {
        name: 'smart_route_task',
        description: 'Find the best agent for a task based on capability matching',
        inputSchema: {
            type: 'object',
            properties: {
                task: {
                    type: 'string',
                    description: 'Description of the task to route'
                },
                context: {
                    type: 'string',
                    description: 'Additional context for routing decision'
                }
            },
            required: ['task']
        },
        handler: handleSmartRouteTask
    }
];