package dao

import (
	"errors"
	"fmt"
	"yintai-api/app/common/model"

	"github.com/spf13/cast"
	"gorm.io/gorm"
)

type Job struct {
	db *gorm.DB
}

func NewJob(db ...*gorm.DB) *Job {
	return &Job{db: getDB(db...)}
}

func (r *Job) TableName() string {
	return "yt_job"
}

func (r *Job) Create(m *model.Job) error {
	return r.db.Table(r.TableName()).Create(m).Error
}

func (r *Job) Update(m *model.Job) error {
	return r.db.Table(r.TableName()).Save(m).Error
}

func (r *Job) Delete(id int64) error {
	return r.db.Table(r.TableName()).Where("id = ?", id).Delete(&Job{}).Error
}

func (r *Job) Get(id int64) (*model.Job, error) {
	var res model.Job
	if err := r.db.Table(r.TableName()).Where("id = ?", id).First(&res).Error; err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return nil, nil
		}
		return nil, err
	}
	return &res, nil
}

func (r *Job) Exists(id int64) (bool, error) {
	var count int64
	if err := r.db.Table(r.TableName()).Where("id = ?", id).Count(&count).Error; err != nil {
		return false, err
	}
	return count > 0, nil
}

func (r *Job) List(lang, city, title, desc, reqs, jobType, jobArea, jobUnit string, page, size int, sort string) ([]*model.JobPage, int64, error) {
	var list []*model.JobPage
	var count int64
	tx := r.db.Table(r.TableName() + " AS p ")
	tx = tx.Joins(fmt.Sprintf(" LEFT JOIN %s t ON p.id = t.job_id ", NewJobTranslations().TableName()))
	if lang != "" {
		tx = tx.Where("t.lang = ?", lang)
	}

	if city != "" {
		tx = tx.Where("p.city = ?", city)
	}

	if title != "" {
		tx = tx.Where("t.name LIKE ?", "%"+title+"%")
	}

	if desc != "" {
		tx = tx.Where("t.description LIKE ?", "%"+desc+"%")
	}

	if reqs != "" {
		tx = tx.Where("t.requirement LIKE ?", "%"+reqs+"%")
	}

	if v := cast.ToInt64(jobType); v != 0 {
		tx = tx.Where("p.job_type = ?", v)
	}

	if v := cast.ToInt64(jobArea); v != 0 {
		tx = tx.Where("p.job_area = ?", v)
	}

	if v := cast.ToInt64(jobUnit); v != 0 {
		tx = tx.Where("p.job_unit = ?", v)
	}

	if err := tx.Count(&count).Error; err != nil {
		return nil, 0, err
	}

	if sort == "" {
		tx = tx.Order(sort)
	} else {
		tx = tx.Order(sort)
	}

	if err := tx.Offset((page - 1) * size).Limit(size).Select("p.*,t.*").Find(&list).Error; err != nil {
		return nil, 0, err
	}

	return list, count, nil
}

func (r *Job) GetLang(id int64, lang string) (*model.JobPage, error) {
	var res *model.JobPage
	tx := r.db.Table(r.TableName() + " AS p ")
	tx = tx.Joins(fmt.Sprintf(" LEFT JOIN %s t ON p.id = t.job_id ", NewJobTranslations().TableName()))
	tx = tx.Where("t.lang = ?", lang)
	tx = tx.Where("p.id = ?", id)

	if err := tx.Select("p.*,t.*").First(&res).Error; err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return nil, nil
		}
		return nil, err
	}

	return res, nil
}