package resolvers

import (
	"context"
	"errors"
	"strings"

	"git.aiterp.net/rpdata/api/graph2/graphcore"
	"git.aiterp.net/rpdata/api/internal/auth"
	"git.aiterp.net/rpdata/api/models"
	"git.aiterp.net/rpdata/api/models/changekeys"
	"git.aiterp.net/rpdata/api/models/changes"
	"git.aiterp.net/rpdata/api/models/characters"
	"git.aiterp.net/rpdata/api/models/logs"
)

// Queries

func (r *queryResolver) Character(ctx context.Context, id *string, nick *string) (*models.Character, error) {
	if id != nil {
		character, err := characters.FindID(*id)
		if err != nil {
			return nil, err
		}

		return &character, nil
	} else if nick != nil {
		character, err := characters.FindNick(*nick)
		if err != nil {
			return nil, err
		}

		return &character, nil
	} else {
		return nil, errors.New("You must specify either an ID or a nick")
	}
}

func (r *queryResolver) Characters(ctx context.Context, filter *characters.Filter) ([]*models.Character, error) {
	characters, err := characters.List(filter)
	if err != nil {
		return nil, err
	}

	characters2 := make([]*models.Character, len(characters))
	for i := range characters {
		characters2[i] = &characters[i]
	}

	return characters2, nil
}

// Mutations

func (r *mutationResolver) AddCharacter(ctx context.Context, input graphcore.CharacterAddInput) (*models.Character, error) {
	token := auth.TokenFromContext(ctx)
	if !token.Permitted("member", "character.add") {
		return nil, errors.New("You are not permitted to add characters")
	}
	if len(input.Name) < 2 || len(input.Nick) < 2 {
		return nil, errors.New("You need to provide a name and a nick (min length: 2)")
	}

	shortName := ""
	if input.ShortName != nil {
		shortName = *input.ShortName
	} else {
		shortName = strings.SplitN(input.Name, " ", 2)[0]
	}

	description := ""
	if input.Description != nil {
		description = *input.Description
	}

	author := token.UserID
	if input.Author != nil && *input.Author != author {
		if !token.Permitted("character.add") {
			return nil, errors.New("You are only permitted to add your own characters")
		}

		author = *input.Author
	}

	logs.ScheduleFullUpdate()

	character, err := characters.Add(input.Nick, input.Name, shortName, author, description)
	if err != nil {
		return nil, errors.New("Adding character failed: " + err.Error())
	}

	go changes.Submit("Character", "add", token.UserID, true, changekeys.Listed(character), character)

	return &character, nil
}

func (r *mutationResolver) AddCharacterNick(ctx context.Context, input graphcore.CharacterNickInput) (*models.Character, error) {
	character, err := characters.FindID(input.ID)
	if err != nil {
		return nil, errors.New("Character not found")
	}

	if len(input.Nick) < 2 {
		return nil, errors.New("You need to provide a valid nick (min length: 2)")
	}

	token := auth.TokenFromContext(ctx)
	if !token.PermittedUser(character.Author, "member", "character.edit") {
		return nil, errors.New("You are not permitted to edit this character")
	}

	logs.ScheduleFullUpdate()

	character, err = characters.AddNick(character, input.Nick)
	if err != nil {
		return nil, errors.New("Failed to add nick: " + err.Error())
	}

	go logs.ScheduleFullUpdate()
	go changes.Submit("Character", "edit", token.UserID, true, changekeys.Listed(character), character)

	return &character, nil
}

func (r *mutationResolver) RemoveCharacterNick(ctx context.Context, input graphcore.CharacterNickInput) (*models.Character, error) {
	character, err := characters.FindID(input.ID)
	if err != nil {
		return nil, errors.New("Character not found")
	}

	token := auth.TokenFromContext(ctx)
	if !token.PermittedUser(character.Author, "member", "character.edit") {
		return nil, errors.New("You are not permitted to edit this character")
	}

	character, err = characters.RemoveNick(character, input.Nick)
	if err != nil {
		return nil, errors.New("Failed to remove nick: " + err.Error())
	}

	go logs.ScheduleFullUpdate()
	go changes.Submit("Character", "edit", token.UserID, true, changekeys.Listed(character), character)

	return &character, nil
}

func (r *mutationResolver) EditCharacter(ctx context.Context, input graphcore.CharacterEditInput) (*models.Character, error) {
	character, err := characters.FindID(input.ID)
	if err != nil {
		return nil, errors.New("Character not found")
	}

	if input.Name != nil && len(*input.Name) < 2 {
		return nil, errors.New("You need to provide a valid name (min length: 2)")
	}
	if input.ShortName != nil && len(*input.ShortName) < 2 {
		return nil, errors.New("You need to provide a valid short name (min length: 2)")
	}

	token := auth.TokenFromContext(ctx)
	if !token.PermittedUser(character.Author, "member", "character.edit") {
		return nil, errors.New("You are not permitted to edit this character")
	}

	character, err = characters.Edit(character, input.Name, input.ShortName, input.Description)
	if err != nil {
		return nil, errors.New("Failed to edit character: " + err.Error())
	}

	go changes.Submit("Character", "edit", token.UserID, true, changekeys.Listed(character), character)

	return &character, nil
}

func (r *mutationResolver) RemoveCharacter(ctx context.Context, input graphcore.CharacterRemoveInput) (*models.Character, error) {
	character, err := characters.FindID(input.ID)
	if err != nil {
		return nil, errors.New("Character not found")
	}

	token := auth.TokenFromContext(ctx)
	if !token.PermittedUser(character.Author, "member", "character.remove") {
		return nil, errors.New("You are not permitted to remove this character")
	}

	character, err = characters.Remove(character)
	if err != nil {
		return nil, errors.New("Failed to remove character: " + err.Error())
	}

	go changes.Submit("Character", "remove", token.UserID, true, changekeys.Listed(character), character)

	return &character, nil
}