/**
 * CLI Settings Routes Module
 * Handles Claude CLI settings file management API endpoints
 */

import type { RouteContext } from './types.js';
import {
  saveEndpointSettings,
  loadEndpointSettings,
  deleteEndpointSettings,
  listAllSettings,
  toggleEndpointEnabled,
  getSettingsFilePath,
  ensureSettingsDir,
  sanitizeEndpointId
} from '../../config/cli-settings-manager.js';
import type { SaveEndpointRequest } from '../../types/cli-settings.js';
import { validateSettings } from '../../types/cli-settings.js';
import { syncBuiltinToolsAvailability, getBuiltinToolsSyncReport } from '../../tools/claude-cli-tools.js';

/**
 * Handle CLI Settings routes
 * @returns true if route was handled, false otherwise
 */
export async function handleCliSettingsRoutes(ctx: RouteContext): Promise<boolean> {
  const { pathname, req, res, handlePostRequest, broadcastToClients } = ctx;

  // Ensure settings directory exists
  ensureSettingsDir();

  // ========== LIST ALL SETTINGS ==========
  // GET /api/cli/settings
  if (pathname === '/api/cli/settings' && req.method === 'GET') {
    try {
      const result = listAllSettings();
      res.writeHead(200, { 'Content-Type': 'application/json' });
      res.end(JSON.stringify(result));
    } catch (err) {
      res.writeHead(500, { 'Content-Type': 'application/json' });
      res.end(JSON.stringify({ error: (err as Error).message }));
    }
    return true;
  }

  // ========== CREATE/UPDATE SETTINGS ==========
  // POST /api/cli/settings
  if (pathname === '/api/cli/settings' && req.method === 'POST') {
    handlePostRequest(req, res, async (body: unknown) => {
      try {
        const request = body as SaveEndpointRequest;

        // Validate required fields
        if (!request.name) {
          return { error: 'name is required', status: 400 };
        }
        if (!request.settings || !request.settings.env) {
          return { error: 'settings.env is required', status: 400 };
        }
        // Deep validation of settings object
        if (!validateSettings(request.settings)) {
          return { error: 'Invalid settings object format', status: 400 };
        }

        const result = saveEndpointSettings(request);

        if (result.success) {
          // Broadcast settings created/updated event
          broadcastToClients({
            type: 'CLI_SETTINGS_UPDATED',
            payload: {
              endpoint: result.endpoint,
              filePath: result.filePath,
              timestamp: new Date().toISOString()
            }
          });
          return result;
        } else {
          return { error: result.message, status: 500 };
        }
      } catch (err) {
        return { error: (err as Error).message, status: 500 };
      }
    });
    return true;
  }

  // ========== GET SINGLE SETTINGS ==========
  // GET /api/cli/settings/:id
  const getMatch = pathname.match(/^\/api\/cli\/settings\/([^/]+)$/);
  if (getMatch && req.method === 'GET') {
    const endpointId = sanitizeEndpointId(getMatch[1]);
    try {
      const endpoint = loadEndpointSettings(endpointId);

      if (!endpoint) {
        res.writeHead(404, { 'Content-Type': 'application/json' });
        res.end(JSON.stringify({ error: 'Endpoint not found' }));
        return true;
      }

      res.writeHead(200, { 'Content-Type': 'application/json' });
      res.end(JSON.stringify({
        endpoint,
        filePath: getSettingsFilePath(endpointId)
      }));
    } catch (err) {
      res.writeHead(500, { 'Content-Type': 'application/json' });
      res.end(JSON.stringify({ error: (err as Error).message }));
    }
    return true;
  }

  // ========== UPDATE SETTINGS ==========
  // PUT /api/cli/settings/:id
  const putMatch = pathname.match(/^\/api\/cli\/settings\/([^/]+)$/);
  if (putMatch && req.method === 'PUT') {
    const endpointId = sanitizeEndpointId(putMatch[1]);
    handlePostRequest(req, res, async (body: unknown) => {
      try {
        const request = body as Partial<SaveEndpointRequest>;

        // Check if just toggling enabled status
        if (Object.keys(request).length === 1 && 'enabled' in request) {
          const result = toggleEndpointEnabled(endpointId, request.enabled as boolean);

          if (result.success) {
            broadcastToClients({
              type: 'CLI_SETTINGS_TOGGLED',
              payload: {
                endpointId,
                enabled: request.enabled,
                timestamp: new Date().toISOString()
              }
            });
          }
          return result;
        }

        // Full update
        const existing = loadEndpointSettings(endpointId);
        if (!existing) {
          return { error: 'Endpoint not found', status: 404 };
        }

        const updateRequest: SaveEndpointRequest = {
          id: endpointId,
          name: request.name || existing.name,
          description: request.description ?? existing.description,
          settings: request.settings || existing.settings,
          enabled: request.enabled ?? existing.enabled
        };

        const result = saveEndpointSettings(updateRequest);

        if (result.success) {
          broadcastToClients({
            type: 'CLI_SETTINGS_UPDATED',
            payload: {
              endpoint: result.endpoint,
              filePath: result.filePath,
              timestamp: new Date().toISOString()
            }
          });
        }

        return result;
      } catch (err) {
        return { error: (err as Error).message, status: 500 };
      }
    });
    return true;
  }

  // ========== DELETE SETTINGS ==========
  // DELETE /api/cli/settings/:id
  const deleteMatch = pathname.match(/^\/api\/cli\/settings\/([^/]+)$/);
  if (deleteMatch && req.method === 'DELETE') {
    const endpointId = sanitizeEndpointId(deleteMatch[1]);
    try {
      const result = deleteEndpointSettings(endpointId);

      if (result.success) {
        broadcastToClients({
          type: 'CLI_SETTINGS_DELETED',
          payload: {
            endpointId,
            timestamp: new Date().toISOString()
          }
        });

        res.writeHead(200, { 'Content-Type': 'application/json' });
        res.end(JSON.stringify(result));
      } else {
        res.writeHead(404, { 'Content-Type': 'application/json' });
        res.end(JSON.stringify(result));
      }
    } catch (err) {
      res.writeHead(500, { 'Content-Type': 'application/json' });
      res.end(JSON.stringify({ error: (err as Error).message }));
    }
    return true;
  }

  // ========== GET SETTINGS FILE PATH ==========
  // GET /api/cli/settings/:id/path
  const pathMatch = pathname.match(/^\/api\/cli\/settings\/([^/]+)\/path$/);
  if (pathMatch && req.method === 'GET') {
    const endpointId = sanitizeEndpointId(pathMatch[1]);
    try {
      const endpoint = loadEndpointSettings(endpointId);

      if (!endpoint) {
        res.writeHead(404, { 'Content-Type': 'application/json' });
        res.end(JSON.stringify({ error: 'Endpoint not found' }));
        return true;
      }

      const filePath = getSettingsFilePath(endpointId);
      res.writeHead(200, { 'Content-Type': 'application/json' });
      res.end(JSON.stringify({
        endpointId,
        filePath,
        enabled: endpoint.enabled
      }));
    } catch (err) {
      res.writeHead(500, { 'Content-Type': 'application/json' });
      res.end(JSON.stringify({ error: (err as Error).message }));
    }
    return true;
  }

  // ========== SYNC BUILTIN TOOLS AVAILABILITY ==========
  // POST /api/cli/settings/sync-tools
  if (pathname === '/api/cli/settings/sync-tools' && req.method === 'POST') {
    handlePostRequest(req, res, async (body: any) => {
      const { initialPath } = ctx;
      try {
        const result = await syncBuiltinToolsAvailability(initialPath);

        // Broadcast update event
        broadcastToClients({
          type: 'CLI_TOOLS_CONFIG_UPDATED',
          payload: {
            tools: result.config,
            timestamp: new Date().toISOString()
          }
        });

        res.writeHead(200, { 'Content-Type': 'application/json' });
        res.end(JSON.stringify({
          success: true,
          changes: result.changes,
          config: result.config
        }));
      } catch (err) {
        res.writeHead(500, { 'Content-Type': 'application/json' });
        res.end(JSON.stringify({ error: (err as Error).message }));
      }
    });
    return true;
  }

  // GET /api/cli/settings/sync-report
  if (pathname === '/api/cli/settings/sync-report' && req.method === 'GET') {
    try {
      const { initialPath } = ctx;
      const report = await getBuiltinToolsSyncReport(initialPath);

      res.writeHead(200, { 'Content-Type': 'application/json' });
      res.end(JSON.stringify(report));
    } catch (err) {
      res.writeHead(500, { 'Content-Type': 'application/json' });
      res.end(JSON.stringify({ error: (err as Error).message }));
    }
    return true;
  }

  return false;
}