package handlers

import (
	"log"
	"net/http"
	"time"

	"github.com/Fimeg/RedFlag/aggregator-server/internal/database/queries"
	"github.com/Fimeg/RedFlag/aggregator-server/internal/models"
	"github.com/gin-gonic/gin"
	"github.com/google/uuid"
)

// StorageMetricsHandler handles storage metrics endpoints
type StorageMetricsHandler struct {
	queries *queries.StorageMetricsQueries
}

// NewStorageMetricsHandler creates a new storage metrics handler
func NewStorageMetricsHandler(queries *queries.StorageMetricsQueries) *StorageMetricsHandler {
	return &StorageMetricsHandler{
		queries: queries,
	}
}

// ReportStorageMetrics handles POST /api/v1/agents/:id/storage-metrics
func (h *StorageMetricsHandler) ReportStorageMetrics(c *gin.Context) {
	// Get agent ID from context (set by middleware)
	agentID := c.MustGet("agent_id").(uuid.UUID)

	// Parse request body
	var req models.StorageMetricRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request body"})
		return
	}

	// Validate agent ID matches
	if req.AgentID != agentID {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Agent ID mismatch"})
		return
	}

	// Insert storage metrics with error isolation
	for _, metric := range req.Metrics {
		dbMetric := models.StorageMetric{
			ID:             uuid.New(),
			AgentID:        req.AgentID,
			Mountpoint:     metric.Mountpoint,
			Device:         metric.Device,
			DiskType:       metric.DiskType,
			Filesystem:     metric.Filesystem,
			TotalBytes:     metric.TotalBytes,
			UsedBytes:      metric.UsedBytes,
			AvailableBytes: metric.AvailableBytes,
			UsedPercent:    metric.UsedPercent,
			Severity:       metric.Severity,
			Metadata:       metric.Metadata,
			CreatedAt:      time.Now(),
		}

		if err := h.queries.InsertStorageMetric(c.Request.Context(), dbMetric); err != nil {
			log.Printf("[ERROR] Failed to insert storage metric for agent %s: %v\n", agentID, err)
			c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to insert storage metric"})
			return
		}
	}

	c.JSON(http.StatusOK, gin.H{
		"status":  "success",
		"message": "Storage metrics reported successfully",
	})
}

// GetStorageMetrics handles GET /api/v1/agents/:id/storage-metrics
func (h *StorageMetricsHandler) GetStorageMetrics(c *gin.Context) {
	// Get agent ID from context (set by middleware)
	agentID := c.MustGet("agent_id").(uuid.UUID)

	// Get storage metrics
	metrics, err := h.queries.GetStorageMetricsByAgentID(c.Request.Context(), agentID, 100, 0)
	if err != nil {
		log.Printf("[ERROR] Failed to retrieve storage metrics for agent %s: %v\n", agentID, err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to retrieve storage metrics"})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"metrics": metrics,
		"total":   len(metrics),
	})
}