package config

import (
	"fmt"

	"sneak.berlin/go/vaultik/internal/exclude"
)

// validateExcludes refuses an exclude pattern, global or in a snapshot,
// that does not compile, naming the setting and quoting the pattern.
func (c *Config) validateExcludes() error {
	err := validateExcludeList("exclude", c.Exclude)
	if err != nil {
		return err
	}

	for _, name := range c.SnapshotNames() {
		err = validateExcludeList("snapshots."+name+".exclude",
			c.Snapshots[name].Exclude)
		if err != nil {
			return err
		}
	}

	return nil
}

// validateExcludeList refuses the first pattern in patterns that does not
// compile. setting is the name of the list, as in "exclude".
func validateExcludeList(setting string, patterns []string) error {
	for i, pattern := range patterns {
		_, _, err := exclude.Compile(pattern)
		if err != nil {
			return fmt.Errorf("%s[%d]: %w", setting, i, err)
		}
	}

	return nil
}