package repository

import (
	"context"
	"kontor-api-echo/internal/models"
	"log/slog"
	"time"

	"github.com/labstack/echo/v5"
	"github.com/uptrace/bun"
)

type AssignmentRepository struct {
	db *bun.DB
}

func NewAssignmentRepository(db *bun.DB) *AssignmentRepository {
	repository := &AssignmentRepository{db: db}
	return repository
}

func (repository *AssignmentRepository) FindAll(context context.Context) ([]models.Assignment, error) {
	var assignments []models.Assignment
	err := repository.db.NewSelect().Model(&assignments).Scan(context)
	if err != nil {
		slog.Info(err.Error())
		return nil, echo.ErrInternalServerError
	}
	slog.Info("AssignmentRepository#FindAll", "count", len(assignments))

	return assignments, nil
}

func (repository *AssignmentRepository) GetById(context context.Context, id string) (*models.Assignment, error) {
	var assignment = models.Assignment{ID: id}
	slog.Info("AssignmentRepository#GetById", "id", id)
	err := repository.db.NewSelect().Model(&assignment).Where("id = ?", id).Scan(context)
	if err != nil {
		slog.Info("AssignmentRepository#GetById", "error", err.Error())
		return nil, err
	}
	return &assignment, err
}

func (repository *AssignmentRepository) Import(dtos models.AssignmentDTOList) {
	slog.Info("AssignmentRepository#Import")
	for index, dto := range dtos {
		slog.Info("importing", "index", index, "assignment", dto)
		model := dto.ConvertDTOToModel()
		existing_item := models.Assignment{ID: dto.ID}
		err := repository.db.NewSelect().Model(&existing_item).Where("id = ?", dto.ID).Scan(context.Background())
		if err != nil {
			slog.Info("check existing id: not found - inserting")
			_, err := repository.db.NewInsert().Model(&model).Exec(context.Background())
			if err != nil {
				slog.Info("error during import", "error", err.Error())
			}
		} else {
			slog.Info("check existing id: found - updating")
			_, err := repository.db.NewUpdate().Model(&model).
				Set("updated_at = ? ", time.Now).
				Where("id = ?", model.ID).
				Exec(context.Background())
			if err != nil {
				slog.Info("error during updating", "error", err.Error())
			}
		}
	}
}