package graph

// This file will be automatically regenerated based on the schema, any resolver
// implementations
// will be copied through when generating and any unknown code will be moved to the end.
// Code generated by github.com/99designs/gqlgen version v0.17.88

import (
	"context"
	"fmt"

	"adam-french.co.uk/backend/graph/model"
	"adam-french.co.uk/backend/models"
)

// CreatePost is the resolver for the createPost field.
func (r *mutationResolver) CreatePost(ctx context.Context, input model.CreatePostInput) (*models.Post, error) {
	if !IsAdminFromCtx(ctx) {
		return nil, fmt.Errorf("admin access required")
	}

	userID, ok := UserIDFromCtx(ctx)
	if !ok {
		return nil, fmt.Errorf("unauthorized")
	}

	post := models.Post{Title: input.Title, Content: input.Content, AuthorID: userID}
	if err := r.Store.DB.Create(&post).Error; err != nil {
		return nil, err
	}

	return &post, nil
}

// UpdatePost is the resolver for the updatePost field.
func (r *mutationResolver) UpdatePost(ctx context.Context, id int, input model.UpdatePostInput) (*models.Post, error) {
	if !IsAdminFromCtx(ctx) {
		return nil, fmt.Errorf("admin access required")
	}

	userID, ok := UserIDFromCtx(ctx)
	if !ok {
		return nil, fmt.Errorf("unauthorized")
	}

	var post models.Post
	if err := r.Store.DB.First(&post, id).Error; err != nil {
		return nil, fmt.Errorf("post not found")
	}

	if post.AuthorID != userID {
		return nil, fmt.Errorf("you can only update your own posts")
	}

	post.Title = input.Title
	post.Content = input.Content
	if err := r.Store.DB.Save(&post).Error; err != nil {
		return nil, err
	}

	return &post, nil
}

// DeletePost is the resolver for the deletePost field.
func (r *mutationResolver) DeletePost(ctx context.Context, id int) (*models.Post, error) {
	if !IsAdminFromCtx(ctx) {
		return nil, fmt.Errorf("admin access required")
	}

	userID, ok := UserIDFromCtx(ctx)
	if !ok {
		return nil, fmt.Errorf("unauthorized")
	}

	var post models.Post
	if err := r.Store.DB.First(&post, id).Error; err != nil {
		return nil, fmt.Errorf("post not found")
	}

	if post.AuthorID != userID {
		return nil, fmt.Errorf("you can only delete your own posts")
	}

	r.Store.DB.Delete(&post)
	return &post, nil
}

// ID is the resolver for the id field.
func (r *postResolver) ID(ctx context.Context, obj *models.Post) (int, error) {
	return int(obj.ID), nil
}

// Posts is the resolver for the posts field.
func (r *queryResolver) Posts(ctx context.Context) ([]*models.Post, error) {
	var posts []models.Post
	if err := r.Store.DB.Preload("Author").Order("created_at DESC").Find(&posts).Error; err != nil {
		return nil, err
	}
	result := make([]*models.Post, len(posts))
	for i := range posts {
		result[i] = &posts[i]
	}
	return result, nil
}

// Post is the resolver for the post field.
func (r *queryResolver) Post(ctx context.Context, id int) (*models.Post, error) {
	var post models.Post
	if err := r.Store.DB.Preload("Author").First(&post, id).Error; err != nil {
		return nil, fmt.Errorf("post not found")
	}
	return &post, nil
}

// Post returns PostResolver implementation.
func (r *Resolver) Post() PostResolver { return &postResolver{r} }

type postResolver struct{ *Resolver }