package repository

import (
	"errors"
	"strconv"
	"time"
)

var (
	ErrNoConfigEntry       = errors.New("no config entry for the given key")
	ErrMultipleConfigEntry = errors.New("multiple config entry for the given key")
)

// Config represent the common function interacting with the repository config storage
type Config interface {
	ConfigRead
	ConfigWrite
}

type ConfigRead interface {
	// ReadAll reads all key/value pair matching the key prefix
	ReadAll(keyPrefix string) (map[string]string, error)

	// ReadBool read a single boolean value from the config
	// Return ErrNoConfigEntry or ErrMultipleConfigEntry if
	// there is zero or more than one entry for this key
	ReadBool(key string) (bool, error)

	// ReadBool read a single string value from the config
	// Return ErrNoConfigEntry or ErrMultipleConfigEntry if
	// there is zero or more than one entry for this key
	ReadString(key string) (string, error)

	// ReadTimestamp read a single timestamp value from the config
	// Return ErrNoConfigEntry or ErrMultipleConfigEntry if
	// there is zero or more than one entry for this key
	ReadTimestamp(key string) (time.Time, error)
}

type ConfigWrite interface {
	// Store writes a single key/value pair in the config
	StoreString(key, value string) error

	// Store writes a key and timestamp value to the config
	StoreTimestamp(key string, value time.Time) error

	// Store writes a key and boolean value to the config
	StoreBool(key string, value bool) error

	// RemoveAll removes all key/value pair matching the key prefix
	RemoveAll(keyPrefix string) error
}

func ParseTimestamp(s string) (time.Time, error) {
	timestamp, err := strconv.Atoi(s)
	if err != nil {
		return time.Time{}, err
	}

	return time.Unix(int64(timestamp), 0), nil
}