package items

import (
	"dk/internal/database"
	"fmt"

	"zombiezen.com/go/sqlite"
)

// Builder provides a fluent interface for creating items
type Builder struct {
	item *Item
	db   *database.DB
}

// NewBuilder creates a new item builder
func NewBuilder(db *database.DB) *Builder {
	return &Builder{
		item: &Item{db: db},
		db:   db,
	}
}

// WithType sets the item type
func (b *Builder) WithType(itemType int) *Builder {
	b.item.Type = itemType
	return b
}

// WithName sets the item name
func (b *Builder) WithName(name string) *Builder {
	b.item.Name = name
	return b
}

// WithValue sets the item value
func (b *Builder) WithValue(value int) *Builder {
	b.item.Value = value
	return b
}

// WithAtt sets the item attack/defense value
func (b *Builder) WithAtt(att int) *Builder {
	b.item.Att = att
	return b
}

// WithSpecial sets the item special attributes
func (b *Builder) WithSpecial(special string) *Builder {
	b.item.Special = special
	return b
}

// Create saves the item to the database and returns it
func (b *Builder) Create() (*Item, error) {
	// Use a transaction to ensure we can get the ID
	var item *Item
	err := b.db.Transaction(func(tx *database.Tx) error {
		query := `INSERT INTO items (type, name, value, att, special) 
		          VALUES (?, ?, ?, ?, ?)`

		if err := tx.Exec(query, b.item.Type, b.item.Name, b.item.Value, b.item.Att, b.item.Special); err != nil {
			return fmt.Errorf("failed to insert item: %w", err)
		}

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

		// Create the item with the ID
		item = &Item{
			ID:      lastID,
			Type:    b.item.Type,
			Name:    b.item.Name,
			Value:   b.item.Value,
			Att:     b.item.Att,
			Special: b.item.Special,
			db:      b.db,
		}

		return nil
	})

	if err != nil {
		return nil, fmt.Errorf("failed to create item: %w", err)
	}

	return item, nil
}