package repository

import (
	"context"

	"github.com/Caknoooo/go-gin-clean-starter/database/entities"
	"github.com/Caknoooo/go-gin-clean-starter/modules/assignment/query"
	"gorm.io/gorm"
)

type AssignmentRepository interface {
	Create(ctx context.Context, tx *gorm.DB, assignment entities.TAssignmentEntity) (entities.TAssignmentEntity, error)
	GetById(ctx context.Context, tx *gorm.DB, id string) (entities.TAssignmentEntity, error)
	GetAll(ctx context.Context, filter query.AssignmentFilter) ([]entities.TAssignmentEntity, int64, error)
	Update(ctx context.Context, tx *gorm.DB, assignment entities.TAssignmentEntity) (entities.TAssignmentEntity, error)
	Delete(ctx context.Context, tx *gorm.DB, id string) error
}

type assignmentRepository struct {
	db *gorm.DB
}

func NewAssignmentRepository(db *gorm.DB) AssignmentRepository {
	return &assignmentRepository{db: db}
}

func (r *assignmentRepository) Create(ctx context.Context, tx *gorm.DB, assignment entities.TAssignmentEntity) (entities.TAssignmentEntity, error) {
	if tx == nil {
		tx = r.db
	}
	if err := tx.WithContext(ctx).Create(&assignment).Error; err != nil {
		return assignment, err
	}
	return assignment, nil
}

func (r *assignmentRepository) GetById(ctx context.Context, tx *gorm.DB, id string) (entities.TAssignmentEntity, error) {
	if tx == nil {
		tx = r.db
	}
	var assignment entities.TAssignmentEntity
	if err := tx.WithContext(ctx).
		Preload("Client").
		Preload("AssignmentUsers").
		Preload("AssignmentUsers.User").
		Preload("AssignmentUsers.Role").
		Preload("AssignmentUsers.Client").
		First(&assignment, "id = ?", id).Error; err != nil {
		return assignment, err
	}
	return assignment, nil
}

func (r *assignmentRepository) GetAll(ctx context.Context, filter query.AssignmentFilter) ([]entities.TAssignmentEntity, int64, error) {
	var assignments []entities.TAssignmentEntity
	var total int64
	db := query.ApplyAssignmentFilters(r.db, filter)
	db.Model(&entities.TAssignmentEntity{}).Count(&total)
	if filter.PerPage > 0 && filter.Page > 0 {
		db = db.Offset((filter.Page - 1) * filter.PerPage).Limit(filter.PerPage)
	}
	if err := db.Preload("Client").Preload("AssignmentUsers").Find(&assignments).Error; err != nil {
		return assignments, total, err
	}
	return assignments, total, nil
}

func (r *assignmentRepository) Update(ctx context.Context, tx *gorm.DB, assignment entities.TAssignmentEntity) (entities.TAssignmentEntity, error) {
	if tx == nil {
		tx = r.db
	}
	if err := tx.WithContext(ctx).Model(&entities.TAssignmentEntity{}).Where("id = ?", assignment.ID).Select("*").Updates(&assignment).Error; err != nil {
		return assignment, err
	}
	return assignment, nil
}

func (r *assignmentRepository) Delete(ctx context.Context, tx *gorm.DB, id string) error {
	if tx == nil {
		tx = r.db
	}
	if err := tx.WithContext(ctx).Delete(&entities.TAssignmentEntity{}, "id = ?", id).Error; err != nil {
		return err
	}
	return nil
}