package db

import (
	"database/sql"
	"spend-sparrow/log"
	"spend-sparrow/types"

	"github.com/google/uuid"
	"github.com/jmoiron/sqlx"
)

// While it may be duplicated to check for userId in the database access, it serves as a security layer
type TreasureChest interface {
	Insert(userId uuid.UUID, treasureChest *types.TreasureChest) error
	Update(userId uuid.UUID, treasureChest *types.TreasureChest) error
	GetAll(userId uuid.UUID) ([]*types.TreasureChest, error)
	GetAllByParentId(userId uuid.UUID, parentId uuid.UUID) ([]*types.TreasureChest, error)
	Get(userId uuid.UUID, id uuid.UUID) (*types.TreasureChest, error)
	Delete(userId uuid.UUID, id uuid.UUID) error
}

type TreasureChestSqlite struct {
	db *sqlx.DB
}

func NewTreasureChestSqlite(db *sqlx.DB) *TreasureChestSqlite {
	return &TreasureChestSqlite{db: db}
}

func (db TreasureChestSqlite) Insert(userId uuid.UUID, treasureChest *types.TreasureChest) error {

	_, err := db.db.Exec(`
		INSERT INTO treasure_chest (id, parent_id, user_id, name, current_balance, created_at, created_by) 
		VALUES (?,?,?,?,?,?,?)`, treasureChest.Id, treasureChest.ParentId, userId, treasureChest.Name, 0, treasureChest.CreatedAt, treasureChest.CreatedBy)
	if err != nil {
		log.Error("treasureChest Insert: %v", err)
		return types.ErrInternal
	}

	return nil
}

func (db TreasureChestSqlite) Update(userId uuid.UUID, treasureChest *types.TreasureChest) error {

	r, err := db.db.Exec(`
		UPDATE treasure_chest 
		SET
			parent_id = ?,
			name = ?,
			current_balance = ?,
			updated_at = ?,
			updated_by = ?
		WHERE id = ?
		  AND user_id = ?`, treasureChest.ParentId, treasureChest.Name, treasureChest.CurrentBalance, treasureChest.UpdatedAt, treasureChest.UpdatedBy, treasureChest.Id, userId)
	if err != nil {
		log.Error("treasureChest Update: %v", err)
		return types.ErrInternal
	}
	rows, err := r.RowsAffected()
	if err != nil {
		log.Error("treasureChest Update: %v", err)
		return types.ErrInternal
	}

	if rows == 0 {
		log.Info("treasureChest Update: not found")
		return ErrNotFound
	}

	return nil
}

func (db TreasureChestSqlite) GetAll(userId uuid.UUID) ([]*types.TreasureChest, error) {

	treasureChests := make([]*types.TreasureChest, 0)
	err := db.db.Select(&treasureChests, `
		SELECT 
			id, parent_id,	user_id, name, current_balance, 
			created_at, created_by, updated_at, updated_by
			FROM treasure_chest 
			WHERE user_id = ? 
			ORDER BY name`, userId)
	if err != nil {
		log.Error("treasureChest GetAll: %v", err)
		return nil, types.ErrInternal
	}

	return treasureChests, nil
}

func (db TreasureChestSqlite) GetAllByParentId(userId uuid.UUID, parentId uuid.UUID) ([]*types.TreasureChest, error) {

	treasureChests := make([]*types.TreasureChest, 0)
	err := db.db.Select(&treasureChests, `
		SELECT 
			id, parent_id,	user_id, name, current_balance, 
			created_at, created_by, updated_at, updated_by
			FROM treasure_chest 
			WHERE user_id = ? 
				AND parent_id = ?
			ORDER BY name`, userId, parentId)
	if err != nil {
		log.Error("treasureChest GetAll: %v", err)
		return nil, types.ErrInternal
	}

	return treasureChests, nil
}

func (db TreasureChestSqlite) Get(userId uuid.UUID, id uuid.UUID) (*types.TreasureChest, error) {

	treasureChest := &types.TreasureChest{}
	err := db.db.Get(treasureChest, `
		SELECT 
			id,	parent_id, user_id, name, current_balance,
			created_at, created_by, updated_at, updated_by
			FROM treasure_chest 
			WHERE user_id = ? 
				AND id = ?`, userId, id)
	if err != nil {
		if err == sql.ErrNoRows {
			return nil, ErrNotFound
		}
		log.Error("treasureChest Get: %v", err)
		return nil, types.ErrInternal
	}

	return treasureChest, nil
}

func (db TreasureChestSqlite) Delete(userId uuid.UUID, id uuid.UUID) error {

	res, err := db.db.Exec("DELETE FROM treasure_chest WHERE id = ? and user_id = ?", id, userId)
	if err != nil {
		log.Error("treasureChest Delete: %v", err)
		return types.ErrInternal
	}

	rows, err := res.RowsAffected()
	if err != nil {
		log.Error("treasureChest Delete: %v", err)
		return types.ErrInternal
	}

	if rows == 0 {
		log.Info("treasureChest Delete: not found")
		return ErrNotFound
	}

	return nil
}