package handler

import (
	"bugulma/backend/internal/domain"
	"bugulma/backend/internal/service"
	"net/http"
	"strconv"

	"github.com/gin-gonic/gin"
)

// TrustHandler handles trust metrics and data quality endpoints
type TrustHandler struct {
	trustService *service.TrustService
}

// NewTrustHandler creates a new trust handler
func NewTrustHandler(trustService *service.TrustService) *TrustHandler {
	return &TrustHandler{
		trustService: trustService,
	}
}

// GetTrustScore retrieves trust score for an organization
func (h *TrustHandler) GetTrustScore(c *gin.Context) {
	orgID := c.Param("organizationId")

	trustScore, err := h.trustService.CalculateTrustScore(c.Request.Context(), orgID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, trustScore)
}

// GetDataQualityProfile retrieves data quality profile for an organization
func (h *TrustHandler) GetDataQualityProfile(c *gin.Context) {
	orgID := c.Param("organizationId")

	profile, err := h.trustService.AssessDataQuality(c.Request.Context(), orgID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, profile)
}

// UpdateTrustMetrics updates trust metrics for an organization
func (h *TrustHandler) UpdateTrustMetrics(c *gin.Context) {
	orgID := c.Param("organizationId")

	var metrics []*domain.TrustMetrics
	if err := c.ShouldBindJSON(&metrics); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	if err := h.trustService.UpdateTrustMetrics(c.Request.Context(), orgID, metrics); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "Trust metrics updated successfully"})
}

// SubmitForVerification submits data for verification
func (h *TrustHandler) SubmitForVerification(c *gin.Context) {
	var verifiedData domain.VerifiedData
	if err := c.ShouldBindJSON(&verifiedData); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	if err := h.trustService.SubmitForVerification(c.Request.Context(), &verifiedData); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusCreated, gin.H{"message": "Data submitted for verification"})
}

// VerifyData verifies data element
func (h *TrustHandler) VerifyData(c *gin.Context) {
	dataID := c.Param("dataId")

	var req struct {
		VerifiedBy string `json:"verified_by" binding:"required"`
		Notes      string `json:"notes"`
	}

	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	if err := h.trustService.VerifyData(c.Request.Context(), dataID, req.VerifiedBy, req.Notes); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "Data verified successfully"})
}

// RecordHistoricalSuccess records historical success metrics
func (h *TrustHandler) RecordHistoricalSuccess(c *gin.Context) {
	var success domain.HistoricalSuccess
	if err := c.ShouldBindJSON(&success); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	if err := h.trustService.RecordHistoricalSuccess(c.Request.Context(), &success); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusCreated, gin.H{"message": "Historical success recorded"})
}

// GetTrustDashboard retrieves comprehensive trust dashboard
func (h *TrustHandler) GetTrustDashboard(c *gin.Context) {
	orgID := c.Param("organizationId")

	dashboard, err := h.trustService.GetTrustDashboard(c.Request.Context(), orgID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, dashboard)
}

// GetTrustMetrics retrieves trust metrics with pagination
func (h *TrustHandler) GetTrustMetrics(c *gin.Context) {
	orgID := c.Param("organizationId")
	metricType := c.Query("type")

	limitStr := c.DefaultQuery("limit", "50")
	limit, err := strconv.Atoi(limitStr)
	if err != nil || limit < 1 {
		limit = 50
	}

	var metrics []*domain.TrustMetrics
	if metricType != "" {
		metrics, err = h.trustService.GetTrustRepository().GetByType(c.Request.Context(), orgID, metricType)
	} else {
		metrics, err = h.trustService.GetTrustRepository().GetByOrganization(c.Request.Context(), orgID)
	}

	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	// Apply limit
	if len(metrics) > limit {
		metrics = metrics[:limit]
	}

	c.JSON(http.StatusOK, gin.H{
		"organization_id": orgID,
		"metrics":         metrics,
		"count":           len(metrics),
		"limit":           limit,
	})
}