// internal/utils/matching.go
package utils

import (
	"strings"
)

// CalculateMatchScore calculates match score between two items
func CalculateMatchScore(item1, item2 map[string]interface{}) float64 {
	totalScore := 0.0
	maxScore := 0.0

	// Name matching (30%)
	maxScore += 30
	if name1, ok1 := item1["name"].(string); ok1 {
		if name2, ok2 := item2["name"].(string); ok2 {
			similarity := CalculateStringSimilarity(name1, name2)
			totalScore += similarity * 30
		}
	}

	// Category matching (20%)
	maxScore += 20
	if cat1, ok1 := item1["category"].(string); ok1 {
		if cat2, ok2 := item2["category"].(string); ok2 {
			if strings.EqualFold(cat1, cat2) {
				totalScore += 20
			}
		}
	}

	// Color matching (15%)
	if color1, ok1 := item1["color"].(string); ok1 {
		if color1 != "" {
			maxScore += 15
			if color2, ok2 := item2["color"].(string); ok2 {
				if strings.Contains(strings.ToLower(color2), strings.ToLower(color1)) {
					totalScore += 15
				}
			}
		}
	}

	// Location matching (20%)
	if loc1, ok1 := item1["location"].(string); ok1 {
		if loc1 != "" {
			maxScore += 20
			if loc2, ok2 := item2["location"].(string); ok2 {
				similarity := CalculateStringSimilarity(loc1, loc2)
				totalScore += similarity * 20
			}
		}
	}

	// Description matching (15%)
	maxScore += 15
	if desc1, ok1 := item1["description"].(string); ok1 {
		if desc2, ok2 := item2["description"].(string); ok2 {
			similarity := CalculateStringSimilarity(desc1, desc2)
			totalScore += similarity * 15
		}
	}

	if maxScore == 0 {
		return 0
	}

	return (totalScore / maxScore) * 100
}

// MatchItems matches items based on criteria
func MatchItems(lostItem, foundItems []map[string]interface{}, threshold float64) []map[string]interface{} {
	var matches []map[string]interface{}

	if len(lostItem) == 0 || len(foundItems) == 0 {
		return matches
	}

	lost := lostItem[0]

	for _, found := range foundItems {
		score := CalculateMatchScore(lost, found)
		if score >= threshold {
			match := make(map[string]interface{})
			match["item"] = found
			match["score"] = score
			match["level"] = getMatchLevel(score)
			matches = append(matches, match)
		}
	}

	return matches
}

// getMatchLevel returns match level based on score
func getMatchLevel(score float64) string {
	if score >= 70 {
		return "high"
	} else if score >= 50 {
		return "medium"
	}
	return "low"
}