package storage

import (
	"encoding/json"
	"errors"
	"fmt"
	"github.com/eslider/superherohub/pkg/deesee"
	"os"
	"strings"
)

type DeeSee []*deesee.Superhero

// New DeeSee storage.
func New(path string) (d *DeeSee, err error) {
	d = &DeeSee{}
	err = d.Load(path)
	return
}

// Load superheroes from json file
func (s *DeeSee) Load(path string) (err error) {
	// Read and unmarshal s from  json f path
	f, err := os.OpenFile(path, os.O_RDONLY, 0644)
	if err != nil {
		return fmt.Errorf("unable to read f: %w", err)
	}

	return json.NewDecoder(f).Decode(s)
}

// Store superhero
func (s *DeeSee) Store(hero *deesee.Superhero) (err error) {
	// Check if superhero superpower is acceptable
	if !hero.IsAcceptable() {
		return errors.New(fmt.Sprintf("Hero power is not acceptable: %s", hero.Name))
	}

	// Prevent to store duplicate superheroes
	if deesee.FindByName(*s, strings.TrimSpace(hero.Name)) != nil {
		return errors.New(fmt.Sprintf("Hero already exists: %s", hero.Name))
	}

	*s = append(*s, hero)
	return
}