package characterapi

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

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

// NewCharacter returns the character service implementation.
func NewCharacter(logger *log.Logger) character.Service {
	characterMap := make(map[string]*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.Name]
	if itemToGet == nil {
		s.logger.Printf("character with id '%s' not found", *p.Name)
		return nil, character.MakeNotFound(fmt.Errorf("character with id '%s' not found", *p.Name))
	}
	res = (*s.characters)[*p.Name]

	return
}

func (s *charactersrvc) ListCharacters(ctx context.Context) (res []*character.Character, err error) {
	for _, value := range *s.characters {
		res = append(res, value)
	}
	return
}

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

	existingCharacter := (*s.characters)[p.Name]
	if existingCharacter != nil {
		s.logger.Printf("character with name %s already exists", p.Name)
		return nil, character.MakeAlreadyExists(fmt.Errorf("character with name %s already exists", p.Name))
	}

	(*s.characters)[p.Name] = p
	res = (*s.characters)[p.Name]
	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.Name]
	if itemToUpdate == nil {
		s.logger.Printf("character with id '%s' not found", p.Name)
		return nil, character.MakeNotFound(fmt.Errorf("character with id '%s' not found", p.Name))
	}
	(*s.characters)[p.Name] = p
	res = (*s.characters)[p.Name]

	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.Name]
	if itemToDelete == nil {
		s.logger.Printf("character with id '%s' not found", *p.Name)
		return character.MakeNotFound(fmt.Errorf("character with id '%s' not found", *p.Name))
	}

	delete(*s.characters, *p.Name)

	return
}