package audit

import (
	"RenewCMS/internal/domain/article"
	"RenewCMS/internal/domain/image"
	"strconv"
	"unicode/utf8"
)

func TextChange(field string, before string, after string) Change {
	return Change{Field: field, Kind: ChangeText, Before: &before, After: &after}
}

func BodyChange(before string, after string) Change {
	delta := utf8.RuneCountInString(after) - utf8.RuneCountInString(before)
	return Change{Field: FieldBody, Kind: ChangeBody, Delta: &delta}
}

func ArticleChanges(before article.Article, after article.Article) []Change {
	changes := []Change{}
	if before.Title != after.Title {
		changes = append(changes, TextChange(FieldTitle, before.Title, after.Title))
	}
	if before.IsOnline != after.IsOnline {
		changes = append(changes, TextChange(FieldOnline, strconv.FormatBool(before.IsOnline), strconv.FormatBool(after.IsOnline)))
	}
	if before.Body != after.Body {
		changes = append(changes, BodyChange(before.Body, after.Body))
	}
	return changes
}

func VariantChanges(before image.VariantSettings, after image.VariantSettings) []Change {
	changes := []Change{}
	changes = appendChange(changes, FieldWidth, image.DimensionText(before.Width), image.DimensionText(after.Width))
	changes = appendChange(changes, FieldHeight, image.DimensionText(before.Height), image.DimensionText(after.Height))
	changes = appendChange(changes, FieldFit, string(before.Fit), string(after.Fit))
	changes = appendChange(changes, FieldFormat, string(before.Format), string(after.Format))
	changes = appendChange(changes, FieldQuality, image.QualityText(before.Quality), image.QualityText(after.Quality))
	return changes
}

func appendChange(changes []Change, field string, before string, after string) []Change {
	if before == after {
		return changes
	}
	return append(changes, TextChange(field, before, after))
}

func VariantParams(settings image.VariantSettings) map[string]any {
	params := map[string]any{ParamFit: string(settings.Fit), ParamFormat: string(settings.Format)}
	if settings.Width != nil {
		params[ParamWidth] = *settings.Width
	}
	if settings.Height != nil {
		params[ParamHeight] = *settings.Height
	}
	if settings.Quality != nil {
		params[ParamQuality] = *settings.Quality
	}
	return params
}