import { Request, Response } from 'express';
import { ApiResponse } from '../types/index.js';
import {
  getAllGroups,
  getGroupByIdOrName,
  createGroup,
  updateGroup,
  updateGroupServers,
  deleteGroup,
  addServerToGroup,
  removeServerFromGroup,
  getServerConfigInGroup,
  getServerConfigsInGroup,
  updateServerToolsInGroup,
} from '../services/groupService.js';

// Get all groups
export const getGroups = (_: Request, res: Response): void => {
  try {
    const groups = getAllGroups();
    const response: ApiResponse = {
      success: true,
      data: groups,
    };
    res.json(response);
  } catch (error) {
    res.status(500).json({
      success: false,
      message: 'Failed to get groups information',
    });
  }
};

// Get a specific group by ID
export const getGroup = (req: Request, res: Response): void => {
  try {
    const { id } = req.params;
    if (!id) {
      res.status(400).json({
        success: false,
        message: 'Group ID is required',
      });
      return;
    }

    const group = getGroupByIdOrName(id);
    if (!group) {
      res.status(404).json({
        success: false,
        message: 'Group not found',
      });
      return;
    }

    const response: ApiResponse = {
      success: true,
      data: group,
    };
    res.json(response);
  } catch (error) {
    res.status(500).json({
      success: false,
      message: 'Failed to get group information',
    });
  }
};

// Create a new group
export const createNewGroup = (req: Request, res: Response): void => {
  try {
    const { name, description, servers } = req.body;
    if (!name) {
      res.status(400).json({
        success: false,
        message: 'Group name is required',
      });
      return;
    }

    const serverList = Array.isArray(servers) ? servers : [];

    // Set owner property - use current user's username, default to 'admin'
    const currentUser = (req as any).user;
    const owner = currentUser?.username || 'admin';

    const newGroup = createGroup(name, description, serverList, owner);
    if (!newGroup) {
      res.status(400).json({
        success: false,
        message: 'Failed to create group or group name already exists',
      });
      return;
    }

    const response: ApiResponse = {
      success: true,
      data: newGroup,
      message: 'Group created successfully',
    };
    res.status(201).json(response);
  } catch (error) {
    res.status(500).json({
      success: false,
      message: 'Internal server error',
    });
  }
};

// Update an existing group
export const updateExistingGroup = (req: Request, res: Response): void => {
  try {
    const { id } = req.params;
    const { name, description, servers } = req.body;
    if (!id) {
      res.status(400).json({
        success: false,
        message: 'Group ID is required',
      });
      return;
    }

    // Allow updating servers along with other fields
    const updateData: any = {};
    if (name !== undefined) updateData.name = name;
    if (description !== undefined) updateData.description = description;
    if (servers !== undefined) updateData.servers = servers;

    if (Object.keys(updateData).length === 0) {
      res.status(400).json({
        success: false,
        message: 'At least one field (name, description, or servers) is required to update',
      });
      return;
    }

    const updatedGroup = updateGroup(id, updateData);
    if (!updatedGroup) {
      res.status(404).json({
        success: false,
        message: 'Group not found or name already exists',
      });
      return;
    }

    const response: ApiResponse = {
      success: true,
      data: updatedGroup,
      message: 'Group updated successfully',
    };
    res.json(response);
  } catch (error) {
    res.status(500).json({
      success: false,
      message: 'Internal server error',
    });
  }
};

// Update servers in a group (batch update) - supports both string[] and server config format
export const updateGroupServersBatch = (req: Request, res: Response): void => {
  try {
    const { id } = req.params;
    const { servers } = req.body;

    if (!id) {
      res.status(400).json({
        success: false,
        message: 'Group ID is required',
      });
      return;
    }

    if (!Array.isArray(servers)) {
      res.status(400).json({
        success: false,
        message: 'Servers must be an array of server names or server configurations',
      });
      return;
    }

    // Validate server configurations if provided in new format
    for (const server of servers) {
      if (typeof server === 'object' && server !== null) {
        if (!server.name || typeof server.name !== 'string') {
          res.status(400).json({
            success: false,
            message: 'Each server configuration must have a valid name',
          });
          return;
        }
        if (
          server.tools &&
          server.tools !== 'all' &&
          (!Array.isArray(server.tools) ||
            !server.tools.every((tool: any) => typeof tool === 'string'))
        ) {
          res.status(400).json({
            success: false,
            message: 'Tools must be "all" or an array of strings',
          });
          return;
        }
      }
    }

    const updatedGroup = updateGroupServers(id, servers);
    if (!updatedGroup) {
      res.status(404).json({
        success: false,
        message: 'Group not found',
      });
      return;
    }

    const response: ApiResponse = {
      success: true,
      data: updatedGroup,
      message: 'Group servers updated successfully',
    };
    res.json(response);
  } catch (error) {
    res.status(500).json({
      success: false,
      message: 'Internal server error',
    });
  }
};

// Delete a group
export const deleteExistingGroup = (req: Request, res: Response): void => {
  try {
    const { id } = req.params;
    if (!id) {
      res.status(400).json({
        success: false,
        message: 'Group ID is required',
      });
      return;
    }

    const success = deleteGroup(id);
    if (!success) {
      res.status(404).json({
        success: false,
        message: 'Group not found or failed to delete',
      });
      return;
    }

    res.json({
      success: true,
      message: 'Group deleted successfully',
    });
  } catch (error) {
    res.status(500).json({
      success: false,
      message: 'Internal server error',
    });
  }
};

// Add server to a group
export const addServerToExistingGroup = (req: Request, res: Response): void => {
  try {
    const { id } = req.params;
    const { serverName } = req.body;
    if (!id) {
      res.status(400).json({
        success: false,
        message: 'Group ID is required',
      });
      return;
    }

    if (!serverName) {
      res.status(400).json({
        success: false,
        message: 'Server name is required',
      });
      return;
    }

    const updatedGroup = addServerToGroup(id, serverName);
    if (!updatedGroup) {
      res.status(404).json({
        success: false,
        message: 'Group or server not found',
      });
      return;
    }

    const response: ApiResponse = {
      success: true,
      data: updatedGroup,
      message: 'Server added to group successfully',
    };
    res.json(response);
  } catch (error) {
    res.status(500).json({
      success: false,
      message: 'Internal server error',
    });
  }
};

// Remove server from a group
export const removeServerFromExistingGroup = (req: Request, res: Response): void => {
  try {
    const { id, serverName } = req.params;
    if (!id || !serverName) {
      res.status(400).json({
        success: false,
        message: 'Group ID and server name are required',
      });
      return;
    }

    const updatedGroup = removeServerFromGroup(id, serverName);
    if (!updatedGroup) {
      res.status(404).json({
        success: false,
        message: 'Group not found',
      });
      return;
    }

    const response: ApiResponse = {
      success: true,
      data: updatedGroup,
      message: 'Server removed from group successfully',
    };
    res.json(response);
  } catch (error) {
    res.status(500).json({
      success: false,
      message: 'Internal server error',
    });
  }
};

// Get servers in a group
export const getGroupServers = (req: Request, res: Response): void => {
  try {
    const { id } = req.params;
    if (!id) {
      res.status(400).json({
        success: false,
        message: 'Group ID is required',
      });
      return;
    }

    const group = getGroupByIdOrName(id);
    if (!group) {
      res.status(404).json({
        success: false,
        message: 'Group not found',
      });
      return;
    }

    const response: ApiResponse = {
      success: true,
      data: group.servers,
    };
    res.json(response);
  } catch (error) {
    res.status(500).json({
      success: false,
      message: 'Failed to get group servers',
    });
  }
};

// Get server configurations in a group (including tool selections)
export const getGroupServerConfigs = (req: Request, res: Response): void => {
  try {
    const { id } = req.params;
    if (!id) {
      res.status(400).json({
        success: false,
        message: 'Group ID is required',
      });
      return;
    }

    const serverConfigs = getServerConfigsInGroup(id);
    const response: ApiResponse = {
      success: true,
      data: serverConfigs,
    };
    res.json(response);
  } catch (error) {
    res.status(500).json({
      success: false,
      message: 'Failed to get group server configurations',
    });
  }
};

// Get specific server configuration in a group
export const getGroupServerConfig = (req: Request, res: Response): void => {
  try {
    const { id, serverName } = req.params;
    if (!id || !serverName) {
      res.status(400).json({
        success: false,
        message: 'Group ID and server name are required',
      });
      return;
    }

    const serverConfig = getServerConfigInGroup(id, serverName);
    if (!serverConfig) {
      res.status(404).json({
        success: false,
        message: 'Server not found in group',
      });
      return;
    }

    const response: ApiResponse = {
      success: true,
      data: serverConfig,
    };
    res.json(response);
  } catch (error) {
    res.status(500).json({
      success: false,
      message: 'Failed to get server configuration',
    });
  }
};

// Update tools for a specific server in a group
export const updateGroupServerTools = (req: Request, res: Response): void => {
  try {
    const { id, serverName } = req.params;
    const { tools } = req.body;

    if (!id || !serverName) {
      res.status(400).json({
        success: false,
        message: 'Group ID and server name are required',
      });
      return;
    }

    // Validate tools parameter
    if (
      tools !== 'all' &&
      (!Array.isArray(tools) || !tools.every((tool) => typeof tool === 'string'))
    ) {
      res.status(400).json({
        success: false,
        message: 'Tools must be "all" or an array of strings',
      });
      return;
    }

    const updatedGroup = updateServerToolsInGroup(id, serverName, tools);
    if (!updatedGroup) {
      res.status(404).json({
        success: false,
        message: 'Group or server not found',
      });
      return;
    }

    const response: ApiResponse = {
      success: true,
      data: updatedGroup,
      message: 'Server tools updated successfully',
    };
    res.json(response);
  } catch (error) {
    res.status(500).json({
      success: false,
      message: 'Internal server error',
    });
  }
};