package characterapi

import (
	"context"
	character "crossnokaye-interview-assignment/services/character/gen/character"
	"errors"
	"log"
)

// character service example implementation.
// The example methods log the requests and return zero values.
type charactersrvc struct {
	logger     *log.Logger
	characters map[int]*character.Character
}

// NewCharacter returns the character service implementation.
func NewCharacter(logger *log.Logger) character.Service {
	characterMap := make(map[int]*character.Character)
	return &charactersrvc{logger, characterMap}
}

// GetCharacter implements getCharacter.
func (s *charactersrvc) GetCharacter(ctx context.Context, p *character.GetCharacterPayload) (res *character.Character, err error) {
	s.logger.Print("character.getCharacter")

	itemToGet := s.characters[*p.ID]
	if itemToGet == nil {
		s.logger.Printf("character with id %d not found", &p.ID)
		return nil, errors.New("character not found")
	}
	res = s.characters[*p.ID]

	return
}

// CreateCharacter implements createCharacter.
func (s *charactersrvc) CreateCharacter(ctx context.Context, p *character.Character) (res *character.Character, err error) {
	s.logger.Print("character.createCharacter")
	id := -1

	// Using this method of assigning IDs means they will
	// potentially be non-sequential if ids are deleted
	if p.ID != nil {
		id = *p.ID
	} else {
		id = len(s.characters)
	}

	p.ID = &id
	s.characters[id] = p
	res = s.characters[id]
	return
}

// UpdateCharacter implements updateCharacter.
func (s *charactersrvc) UpdateCharacter(ctx context.Context, p *character.Character) (res *character.Character, err error) {
	s.logger.Print("character.updateCharacter")

	itemToUpdate := s.characters[*p.ID]
	if itemToUpdate == nil {
		s.logger.Printf("characters with id %d not found", &p.ID)
		return nil, errors.New("characters not found")
	}
	s.characters[*p.ID] = p
	res = s.characters[*p.ID]

	return
}

// DeleteCharacter implements deleteCharacter.
func (s *charactersrvc) DeleteCharacter(ctx context.Context, p *character.DeleteCharacterPayload) (err error) {
	s.logger.Print("character.deleteCharacter")

	itemToDelete := s.characters[*p.ID]
	if itemToDelete == nil {
		s.logger.Printf("characters with id %d not found", &p.ID)
		return errors.New("characters not found")
	}

	delete(s.characters, *p.ID)

	return
}