labFusion/services/api-gateway/src/main/java/com/labfusion/controller/SystemController.java

package com.labfusion.controller;

import com.labfusion.model.DeviceState;
import com.labfusion.model.Event;
import com.labfusion.repository.DeviceStateRepository;
import com.labfusion.repository.EventRepository;
import io.swagger.v3.oas.annotations.tags.Tag;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.List;

@RestController
@RequestMapping("/api/system")
@CrossOrigin(origins = "*")
@Tag(name = "System Data", description = "APIs for system events, device states, and metrics")
public class SystemController {
    
    @Autowired
    private EventRepository eventRepository;
    
    @Autowired
    private DeviceStateRepository deviceStateRepository;
    
    @GetMapping("/events")
    public ResponseEntity<List<Event>> getEvents(
            @RequestParam(required = false) String service,
            @RequestParam(required = false) String eventType,
            @RequestParam(required = false) Integer hours) {
        
        List<Event> events;
        
        if (service != null && hours != null) {
            LocalDateTime since = LocalDateTime.now().minusHours(hours);
            events = eventRepository.findRecentEventsByService(service, since);
        } else if (service != null) {
            events = eventRepository.findByService(service);
        } else if (eventType != null) {
            events = eventRepository.findByEventType(eventType);
        } else {
            events = eventRepository.findAll();
        }
        
        return ResponseEntity.ok(events);
    }
    
    @GetMapping("/device-states")
    public ResponseEntity<List<DeviceState>> getDeviceStates(
            @RequestParam(required = false) String entityId,
            @RequestParam(required = false) String service) {
        
        List<DeviceState> states;
        
        if (entityId != null) {
            states = deviceStateRepository.findByEntityId(entityId);
        } else if (service != null) {
            states = deviceStateRepository.findByService(service);
        } else {
            states = deviceStateRepository.findAll();
        }
        
        return ResponseEntity.ok(states);
    }
    
    @GetMapping("/metrics")
    public ResponseEntity<Object> getSystemMetrics() {
        // This would integrate with actual system monitoring
        // For now, return a placeholder response
        return ResponseEntity.ok().body("System metrics endpoint - to be implemented");
    }
}