package changes

import (
	"fmt"

	"gitea.maximumdirect.net/eric/weatherreporter/internal/briefing"
)

func CompareWeekend(previous briefing.Package, current briefing.Package, thresholds Thresholds) ([]Change, error) {
	if previous.Weekend == nil {
		return nil, fmt.Errorf("previous weekend briefing is required")
	}
	if current.Weekend == nil {
		return nil, fmt.Errorf("current weekend briefing is required")
	}
	previousOutlook := briefing.Package{ThreeDay: &briefing.ThreeDay{Days: previous.Weekend.Days}}
	currentOutlook := briefing.Package{ThreeDay: &briefing.ThreeDay{Days: current.Weekend.Days}}
	changes, err := CompareThreeDay(previousOutlook, currentOutlook, thresholds)
	if err != nil {
		return nil, err
	}
	for i := range changes {
		changes[i].Type = "weekend_" + changes[i].Type
	}
	return changes, nil
}