package news

import (
	"fmt"
	"time"

	"dk/internal/database"

	"zombiezen.com/go/sqlite"
)

// Builder provides a fluent interface for creating news posts
type Builder struct {
	news *News
	db   *database.DB
}

// NewBuilder creates a new news builder
func NewBuilder(db *database.DB) *Builder {
	return &Builder{
		news: &News{
			db:     db,
			Posted: time.Now().Unix(), // Default to current time
		},
		db: db,
	}
}

// WithAuthor sets the author ID
func (b *Builder) WithAuthor(authorID int) *Builder {
	b.news.Author = authorID
	return b
}

// WithContent sets the news content
func (b *Builder) WithContent(content string) *Builder {
	b.news.Content = content
	return b
}

// WithPosted sets the posted timestamp
func (b *Builder) WithPosted(posted int64) *Builder {
	b.news.Posted = posted
	return b
}

// WithPostedTime sets the posted timestamp from a time.Time
func (b *Builder) WithPostedTime(t time.Time) *Builder {
	b.news.Posted = t.Unix()
	return b
}

// Create saves the news post to the database and returns the created news with ID
func (b *Builder) Create() (*News, error) {
	// Use a transaction to ensure we can get the ID
	var news *News
	err := b.db.Transaction(func(tx *database.Tx) error {
		query := `INSERT INTO news (author, posted, content) 
		          VALUES (?, ?, ?)`
		
		if err := tx.Exec(query, b.news.Author, b.news.Posted, b.news.Content); err != nil {
			return fmt.Errorf("failed to insert news: %w", err)
		}

		// Get the last insert ID
		var id int
		err := tx.Query("SELECT last_insert_rowid()", func(stmt *sqlite.Stmt) error {
			id = stmt.ColumnInt(0)
			return nil
		})
		if err != nil {
			return fmt.Errorf("failed to get insert ID: %w", err)
		}

		b.news.ID = id
		news = b.news
		return nil
	})
	
	if err != nil {
		return nil, err
	}
	
	return news, nil
}