package data

import (
	"fmt"
	"log"
	"os"
	"path"
	"recipe-manager/helpers"
	"recipe-manager/models"
	"recipe-manager/services/logger"
	"strconv"
	"strings"
	"time"

	"reflect"

	"go.uber.org/zap"
)

type RecipeWithTimeStamps struct {
	Recipe     models.Recipe
	TimeStamps int64
}

type Data struct {
	CurrentFile      string
	CurrentCountryID string
	AllRecipeFiles   map[string][]helpers.RecipePath
	currentRecipe    *models.Recipe
	recipeMap        map[string]RecipeWithTimeStamps
	Countries        []helpers.CountryName
	taoLogger        *logger.TaoLogger
}

var (
	countries = []helpers.CountryName{{
		CountryID:   "tha",
		CountryName: "Thailand",
	}, {
		CountryID:   "mys",
		CountryName: "Malaysia",
	}, {
		CountryID:   "aus",
		CountryName: "Australia",
	},
	}
)

func NewData(taoLogger *logger.TaoLogger) *Data {

	allRecipeFiles := helpers.ScanRecipeFiles(countries)

	defaultFile := "coffeethai02_600.json"
	defaultCountry := "tha"

	// TODO: read 'version' file
	versionPath := path.Join("cofffeemachineConfig", defaultCountry, "version")
	taoLogger.Log.Debug("version", zap.Any("version path", versionPath))

	// versionFile, err := os.Open(versionPath)
	content, err := os.ReadFile(versionPath)

	if err != nil {
		taoLogger.Log.Debug("Error when open version file", zap.Error(err))
	}

	initVersion := string(content)

	// read latest version
	// set latest to default version
	latest_version, err := strconv.Atoi(initVersion)

	if err != nil {
		latest_version = 600
	}

	for _, v := range allRecipeFiles[defaultCountry] {

		// extract filename as version
		current_version_iter, err := strconv.Atoi(strings.Split(strings.Split(v.Name, "_")[1], ".")[0])

		if err != nil {
			continue
		}

		if current_version_iter == latest_version {
			// taoLogger.Log.Debug("current_version_iter", zap.Any("current_version_iter", current_version_iter))
			// set latest
			latest_version = current_version_iter
			defaultFile = v.Name
			break
		}
	}

	taoLogger.Log.Debug("defaultFile", zap.Any("defaultFile", defaultFile), zap.Any("latest_version", latest_version))

	defaultRecipe, err := helpers.ReadRecipeFile(defaultCountry, defaultFile)

	if err != nil {
		log.Panic("Error when read default recipe file:", err)
	}

	return &Data{
		CurrentFile:      defaultFile,
		CurrentCountryID: defaultCountry,
		AllRecipeFiles:   allRecipeFiles,
		currentRecipe:    defaultRecipe,
		recipeMap: map[string]RecipeWithTimeStamps{
			defaultFile: {
				Recipe:     *defaultRecipe,
				TimeStamps: time.Now().Unix(),
			},
		},
		Countries: countries,
		taoLogger: taoLogger,
	}
}

func (d *Data) GetRecipe(countryID, filename string) *models.Recipe {

	if countryID == "" {
		return d.currentRecipe
	}

	if filename == "" || filename == d.CurrentFile {
		return d.currentRecipe
	}

	if recipe, ok := d.recipeMap[filename]; ok {
		d.CurrentFile = filename
		d.CurrentCountryID = countryID
		return &recipe.Recipe
	}

	// change current version and read new recipe
	d.CurrentFile = filename
	d.taoLogger.Log.Debug("GetRecipe", zap.String("filename", filename), zap.String("countryID", countryID))
	d.CurrentCountryID = countryID
	recipe, err := helpers.ReadRecipeFile(countryID, filename)

	if err != nil {
		d.taoLogger.Log.Error("Error when read recipe file, Return default recipe", zap.Error(err))
		return d.currentRecipe
	}

	d.currentRecipe = recipe

	// save to map
	if len(d.recipeMap) > 5 { // limit keep in memory 5 version
		// remove oldest version
		var oldestVersion string
		var oldestTime int64
		for k, v := range d.recipeMap {
			if oldestTime == 0 || v.TimeStamps < oldestTime {
				oldestTime = v.TimeStamps
				oldestVersion = k
			}
		}
		delete(d.recipeMap, oldestVersion)
	}

	d.recipeMap[filename] = RecipeWithTimeStamps{
		Recipe:     *d.currentRecipe,
		TimeStamps: time.Now().Unix(),
	}

	return d.currentRecipe
}

func (d *Data) GetRecipe01() []models.Recipe01 {
	return d.currentRecipe.Recipe01
}

func (d *Data) GetCurrentRecipe() *models.Recipe {
	return d.currentRecipe
}

func (d *Data) GetRecipe01ByProductCode(filename, countryID, productCode string) (models.Recipe01, error) {

	if !strings.Contains(filename, "tmp") {
		if filename == "" || filename == d.CurrentFile {
			fmt.Println("GetRecipe01ByProductCode.ReadCurrent", filename, d.CurrentFile)
			for _, v := range d.currentRecipe.Recipe01 {
				if v.ProductCode == productCode {
					return v, nil
				}
			}
		} else if recipe, ok := d.recipeMap[filename]; ok {
			fmt.Println("GetRecipe01ByProductCode.ReadMap", filename, d.CurrentFile)
			for _, v := range recipe.Recipe.Recipe01 {
				if v.ProductCode == productCode {
					return v, nil
				}
			}
		}
	}

	d.CurrentFile = filename
	d.CurrentCountryID = countryID

	for _, v := range countries {
		if v.CountryName == countryID {
			d.CurrentCountryID = v.CountryID
			countryID = v.CountryID
			break
		}
	}

	recipe, err := helpers.ReadRecipeFile(countryID, filename)

	if err != nil {
		d.taoLogger.Log.Error("Error when read recipe file, Return default recipe", zap.Error(err))
		for _, v := range d.currentRecipe.Recipe01 {
			if v.ProductCode == productCode {
				return v, nil
			}
		}
	}

	d.taoLogger.Log.Debug("GetRecipe01ByProductCode", zap.Any("productCode", productCode), zap.Any("version", recipe.MachineSetting.ConfigNumber))

	d.currentRecipe = recipe

	// save to map
	if len(d.recipeMap) > 5 { // limit keep in memory 5 version
		// remove oldest version
		var oldestVersion string
		var oldestTime int64
		for k, v := range d.recipeMap {
			if oldestTime == 0 || v.TimeStamps < oldestTime {
				oldestTime = v.TimeStamps
				oldestVersion = k
			}
		}
		delete(d.recipeMap, oldestVersion)
	}

	d.recipeMap[filename] = RecipeWithTimeStamps{
		Recipe:     *d.currentRecipe,
		TimeStamps: time.Now().Unix(),
	}

	for _, v := range d.currentRecipe.Recipe01 {
		if v.ProductCode == productCode {
			// d.taoLogger.Log.Debug("GetRecipe01ByProductCode", zap.Any("productCode", productCode), zap.Any("result", v))
			return v, nil
		}
	}

	return models.Recipe01{}, fmt.Errorf("product code: %s not found", productCode)
}

func (d *Data) SetValuesToRecipe(base_recipe []models.Recipe01, recipe models.Recipe01) {
	not_found := false
	global_idx := 0
	for index, v := range base_recipe {
		if v.ProductCode == recipe.ProductCode {
			// Log.Debug("SetValuesToRecipe", zap.Any("old", v), zap.Any("new", recipe))
			// v = recipe
			// TODO: change only changed values

			// transform to map
			base_recipe01_Map := v.ToMap()

			recipe01_Map := recipe.ToMap()

			for k, v := range recipe01_Map {
				if !reflect.DeepEqual(base_recipe01_Map[k], v) {
					d.taoLogger.Log.Debug("SetValuesToRecipe", zap.Any("key", k))
					base_recipe01_Map[k] = v
				}
			}

			base_recipe[index] = base_recipe[index].FromMap(base_recipe01_Map)

			not_found = false
			break
		} else {
			not_found = true
			global_idx = index
		}
	}

	if not_found {
		base_recipe[global_idx+1] = recipe
	}
}

func (d *Data) GetMaterialSetting(countryID, filename string) []models.MaterialSetting {
	result := make([]models.MaterialSetting, 0)

	if countryID == "" {
		copy(result, d.currentRecipe.MaterialSetting)
		return result
	}

	if !strings.Contains(filename, "tmp") {
		if filename == "" || filename == d.CurrentFile {
			copy(result, d.currentRecipe.MaterialSetting)
			d.taoLogger.Log.Debug("GetMaterialSetting", zap.Any("result", result))
			return d.currentRecipe.MaterialSetting
		}

		if recipe, ok := d.recipeMap[filename]; ok {
			copy(result, recipe.Recipe.MaterialSetting)
			d.CurrentFile = filename
			d.CurrentCountryID = countryID
			return d.currentRecipe.MaterialSetting
		}
	}

	d.CurrentFile = filename
	d.CurrentCountryID = countryID
	recipe, err := helpers.ReadRecipeFile(countryID, filename)

	if err != nil {
		d.taoLogger.Log.Error("Error when read recipe file, Return default recipe", zap.Error(err))
		copy(result, d.currentRecipe.MaterialSetting)
		return d.currentRecipe.MaterialSetting
	}

	d.taoLogger.Log.Debug("GetMaterialSetting", zap.Any("recipe", recipe.MaterialSetting))

	d.currentRecipe = recipe

	// save to map
	if len(d.recipeMap) > 5 { // limit keep in memory 5 version
		// remove oldest version
		var oldestVersion string
		var oldestTime int64
		for k, v := range d.recipeMap {
			if oldestTime == 0 || v.TimeStamps < oldestTime {
				oldestTime = v.TimeStamps
				oldestVersion = k
			}
		}
		delete(d.recipeMap, oldestVersion)
	}

	d.recipeMap[filename] = RecipeWithTimeStamps{
		Recipe:     *d.currentRecipe,
		TimeStamps: time.Now().Unix(),
	}

	// copy(result, recipe.MaterialSetting)
	return recipe.MaterialSetting
}

func (d *Data) GetMaterialCode(ids []uint64, countryID, filename string) []models.MaterialCode {
	var result []models.MaterialCode

	if filename == "" || filename == d.CurrentFile {
		result = d.currentRecipe.MaterialCode
	} else if recipe, ok := d.recipeMap[filename]; ok {
		d.CurrentFile = filename
		return recipe.Recipe.MaterialCode
	} else {
		d.CurrentFile = filename
		d.CurrentCountryID = countryID
		recipe, err := helpers.ReadRecipeFile(countryID, filename)

		if err != nil {
			d.taoLogger.Log.Error("Error when read recipe file, Return default recipe", zap.Error(err))
			return d.currentRecipe.MaterialCode
		}

		d.currentRecipe = recipe

		// save to map
		if len(d.recipeMap) > 5 { // limit keep in memory 5 version
			// remove oldest version
			var oldestVersion string
			var oldestTime int64
			for k, v := range d.recipeMap {
				if oldestTime == 0 || v.TimeStamps < oldestTime {
					oldestTime = v.TimeStamps
					oldestVersion = k
				}
			}
			delete(d.recipeMap, oldestVersion)
		}

		d.recipeMap[filename] = RecipeWithTimeStamps{
			Recipe:     *d.currentRecipe,
			TimeStamps: time.Now().Unix(),
		}

		result = d.currentRecipe.MaterialCode
	}

	if len(ids) == 0 {
		return result
	}

	resultFilter := make([]models.MaterialCode, len(ids))
	for _, id := range ids {
		if id == 0 {
			continue
		}

		for _, m := range result {
			if m.MaterialID == id {
				resultFilter = append(resultFilter, m)
				break
			}
		}
	}

	return resultFilter
}

func (d *Data) GetToppings(countryID, filename string) models.Topping {

	if filename == "" || filename == d.CurrentFile {
		return d.currentRecipe.Topping
	} else if recipe, ok := d.recipeMap[filename]; ok {
		d.CurrentFile = filename
		return recipe.Recipe.Topping
	}
	d.CurrentFile = filename
	d.CurrentCountryID = countryID
	recipe, err := helpers.ReadRecipeFile(countryID, filename)

	if err != nil {
		d.taoLogger.Log.Error("Error when read recipe file, Return default recipe", zap.Error(err))
		return d.currentRecipe.Topping
	}

	d.currentRecipe = recipe

	return recipe.Topping
}

func (d *Data) GetToppingsOfRecipe(countryID, filename string, productCode string) ([]models.ToppingSet, error) {
	recipe, err := d.GetRecipe01ByProductCode(filename, countryID, productCode)

	if err != nil {
		d.taoLogger.Log.Error("Error when read recipe file, Return default recipe", zap.Error(err))
		return []models.ToppingSet{}, err
	}

	return recipe.ToppingSet, nil
}

func (d *Data) GetSubmenusOfRecipe(countryID, filename, productCode string) ([]models.Recipe01, error) {
	recipe, err := d.GetRecipe01ByProductCode(filename, countryID, productCode)

	if err != nil {
		d.taoLogger.Log.Error("Error when read recipe file, Return default recipe", zap.Error(err))
		return []models.Recipe01{}, err
	}

	submenu := recipe.SubMenu

	if submenu == nil {
		return []models.Recipe01{}, fmt.Errorf("no submenu")
	}

	return submenu, nil

}

func (d *Data) GetCountryNameByID(countryID string) (string, error) {
	for _, country := range d.Countries {
		if country.CountryID == countryID {
			return country.CountryName, nil
		}
	}
	return "", fmt.Errorf("country ID: %s not found", countryID)
}

func (d *Data) GetCountryIDByName(countryName string) (string, error) {
	for _, country := range d.Countries {
		if country.CountryName == countryName {
			return country.CountryID, nil
		}
	}
	return "", fmt.Errorf("country name: %s not found", countryName)
}