package sql

import (
	"context"

	"emperror.dev/errors"
	"git.sleepycat.moe/sam/mercury/internal/database"
	"github.com/jackc/pgx/v5"
	"github.com/keegancsmith/sqlf"
	"github.com/oklog/ulid/v2"
)

// PostStore is the interface to posts in the database.
type PostStore struct {
	q Querier
}

// NewPostStore creates a new PostStore instance.
func NewPostStore(q Querier) *PostStore {
	return &PostStore{q: q}
}

// ByID gets a post by its ID.
func (s *PostStore) ByID(ctx context.Context, id ulid.ULID) (p database.Post, err error) {
	q := sqlf.Sprintf("SELECT * FROM posts WHERE id = %s", id)

	p, err = Get[database.Post](ctx, s.q, q)
	if err != nil {
		if errors.Cause(err) == pgx.ErrNoRows {
			return p, ErrNotFound
		}
		return p, errors.Wrap(err, "getting post")
	}
	return p, nil
}

func (s *PostStore) Create(ctx context.Context, blog database.Blog, content string) (p database.Post, err error) {
	q := sqlf.Sprintf(
		"INSERT INTO posts (id, blog_id, content, remote) VALUES (%s, %s, %s, %v) RETURNING *",
		makeULID(), blog.ID, content, blog.Remote())

	p, err = Get[database.Post](ctx, s.q, q)
	if err != nil {
		return p, errors.Wrap(err, "creating post")
	}
	return p, nil
}

func (s *PostStore) LocalCount(ctx context.Context) (count int64, err error) {
	q := sqlf.Sprintf("SELECT count(*) FROM posts WHERE remote = false")

	err = s.q.QueryRow(ctx, q.Query(sqlf.PostgresBindVar)).Scan(&count)
	if err != nil {
		return count, errors.Wrap(err, "getting count")
	}
	return count, nil
}