package inspur

import (
	"bufio"
	"regexp"
	"strings"

	"git.mchus.pro/mchus/logpile/internal/models"
)

var (
	fruDeviceRegex = regexp.MustCompile(`^FRU Device Description\s*:\s*(.+)$`)
	fruFieldRegex  = regexp.MustCompile(`^\s+(.+?)\s*:\s*(.*)$`)
)

// ParseFRU parses BMC FRU (Field Replaceable Unit) output
func ParseFRU(content []byte) []models.FRUInfo {
	var fruList []models.FRUInfo
	var current *models.FRUInfo

	scanner := bufio.NewScanner(strings.NewReader(string(content)))
	for scanner.Scan() {
		line := scanner.Text()

		// Check for new FRU device
		if matches := fruDeviceRegex.FindStringSubmatch(line); matches != nil {
			if current != nil && current.Description != "" {
				fruList = append(fruList, *current)
			}
			current = &models.FRUInfo{
				Description: strings.TrimSpace(matches[1]),
			}
			continue
		}

		// Skip if no current FRU device
		if current == nil {
			continue
		}

		// Skip "Device not present" entries
		if strings.Contains(line, "Device not present") {
			current = nil
			continue
		}

		// Parse FRU fields
		if matches := fruFieldRegex.FindStringSubmatch(line); matches != nil {
			fieldName := strings.TrimSpace(matches[1])
			fieldValue := strings.TrimSpace(matches[2])

			switch fieldName {
			case "Chassis Type":
				current.ChassisType = fieldValue
			case "Chassis Part Number":
				if fieldValue != "0" {
					current.PartNumber = fieldValue
				}
			case "Chassis Serial":
				if fieldValue != "0" {
					current.SerialNumber = fieldValue
				}
			case "Board Mfg Date":
				current.MfgDate = fieldValue
			case "Board Mfg", "Product Manufacturer":
				if fieldValue != "NULL" {
					current.Manufacturer = fieldValue
				}
			case "Board Product", "Product Name":
				if fieldValue != "NULL" {
					current.ProductName = fieldValue
				}
			case "Board Serial", "Product Serial":
				current.SerialNumber = fieldValue
			case "Board Part Number", "Product Part Number":
				if fieldValue != "0" {
					current.PartNumber = fieldValue
				}
			case "Product Version":
				if fieldValue != "0" {
					current.Version = fieldValue
				}
			case "Product Asset Tag":
				if fieldValue != "NULL" {
					current.AssetTag = fieldValue
				}
			}
		}
	}

	// Don't forget the last one
	if current != nil && current.Description != "" {
		fruList = append(fruList, *current)
	}

	return fruList
}