package controllers

import (
	"encoding/json"
	"errors"
	"fmt"
	"multitenantStack/constants"
	"multitenantStack/models"
	"multitenantStack/services/companydb"
	tokenTools "multitenantStack/services/tokenTools"
	"strconv"
	"strings"

	"github.com/astaxie/beego/orm"
)

// CompanyUserController operations for CompanyUser
type CompanyUserController struct {
	BaseAPIController
}

// URLMapping ...
func (c *CompanyUserController) URLMapping() {
	c.Mapping("Post", c.Post)
	c.Mapping("GetOne", c.GetOne)
	c.Mapping("GetAll", c.GetAll)
	c.Mapping("Put", c.Put)
	c.Mapping("Delete", c.Delete)
	c.Mapping("DeleteCompany", c.DeleteCompany)
}

// Post ...
// @Title Post
// @Description Create a new CompanyUser and his user company mapping
// @Param	body		body 	models.CompanyUser	true		"body for CompanyUser content"
// @Success 201 {int} models.CompanyUser
// @Failure 403 body is empty
// @router / [post]
func (c *CompanyUserController) Post() {
	email := c.GetString("email")
	password := c.GetString("password")
	name := c.GetString("name")

	if email == "" || password == "" || name == "" {
		c.ServeJSONError("Email/Password/Name missing")
		return
	}

	systemdb := companydb.GetSystemDatabase()

	if systemdb == nil {
		c.ServeJSONError("Error retrieving User")
		return
	}

	systemO, err := orm.NewOrmWithDB("postgres", "default", systemdb)
	if err != nil {
		c.ServeJSONError("Error retrieving User")
		return
	}

	ucmExists, err := models.GetUserCompanyMapByEmail(systemO, email)
	if ucmExists != nil {
		fmt.Println(ucmExists)
		c.ServeJSONError("Error: Email exists!")
		return
	}

	var companyUser models.CompanyUser
	companyUser.Name = name
	companyUser.Profile = "{}"
	companyUser.Role = constants.RoleAdmin

	companyUserId, err := models.AddCompanyUser(o, &companyUser)
	if err != nil {
		c.ServeJSONErrorWithError("Error on saving company user", err)
		return
	}

	var userCompanyMapping models.UserCompanyMap
	newHash, _ := tokenTools.HashPassword(password)
	userCompanyMapping.PasswordHash = newHash
	userCompanyMapping.CompanyUserID = int16(companyUserId)
	userCompanyMapping.Company = jwtSession.CompanyName
	userCompanyMapping.Email = email

	_, err = models.AddUserCompanyMap(systemO, &userCompanyMapping)
	if err == nil {
		c.ServeJSONSuccess("Success")
		return
	} else {
		c.ServeJSONErrorWithError("Error on saving user", err)
		return
	}
}

// GetOne ...
// @Title Get One
// @Description get CompanyUser by id
// @Param	id		path 	string	true		"The key for staticblock"
// @Success 200 {object} models.CompanyUser
// @Failure 403 :id is empty
// @router /:id [get]
func (c *CompanyUserController) GetOne() {
	idStr := c.Ctx.Input.Param(":id")
	id, _ := strconv.Atoi(idStr)
	v, err := models.GetCompanyUserById(o, id)
	if err != nil {
		c.ServeJSONErrorWithError("Error", err)
	} else {
		c.Data["json"] = v
	}
	c.ServeJSON()
}

// GetAll ...
// @Title Get All
// @Description get CompanyUser
// @Param	query	query	string	false	"Filter. e.g. col1:v1,col2:v2 ..."
// @Param	fields	query	string	false	"Fields returned. e.g. col1,col2 ..."
// @Param	sortby	query	string	false	"Sorted-by fields. e.g. col1,col2 ..."
// @Param	order	query	string	false	"Order corresponding to each sortby field, if single value, apply to all sortby fields. e.g. desc,asc ..."
// @Param	limit	query	string	false	"Limit the size of result set. Must be an integer"
// @Param	offset	query	string	false	"Start position of result set. Must be an integer"
// @Success 200 {object} models.CompanyUser
// @Failure 403
// @router / [get]
func (c *CompanyUserController) GetAll() {
	var fields []string
	var sortby []string
	var order []string
	var query = make(map[string]string)
	var limit int64 = 10
	var offset int64

	// fields: col1,col2,entity.col3
	if v := c.GetString("fields"); v != "" {
		fields = strings.Split(v, ",")
	}
	// limit: 10 (default is 10)
	if v, err := c.GetInt64("limit"); err == nil {
		limit = v
	}
	// offset: 0 (default is 0)
	if v, err := c.GetInt64("offset"); err == nil {
		offset = v
	}
	// sortby: col1,col2
	if v := c.GetString("sortby"); v != "" {
		sortby = strings.Split(v, ",")
	}
	// order: desc,asc
	if v := c.GetString("order"); v != "" {
		order = strings.Split(v, ",")
	}
	// query: k:v,k:v
	if v := c.GetString("query"); v != "" {
		for _, cond := range strings.Split(v, ",") {
			kv := strings.SplitN(cond, ":", 2)
			if len(kv) != 2 {
				c.Data["json"] = errors.New("Error: invalid query key/value pair")
				c.ServeJSON()
				return
			}
			k, v := kv[0], kv[1]
			query[k] = v
		}
	}

	l, err := models.GetAllCompanyUser(o, query, fields, sortby, order, offset, limit)
	if err != nil {
		c.ServeJSONErrorWithError("Error", err)
	} else {
		c.Data["json"] = l
	}
	c.ServeJSON()
}

// Put ...
// @Title Put
// @Description update the CompanyUser
// @Param	id		path 	string	true		"The id you want to update"
// @Param	body		body 	models.CompanyUser	true		"body for CompanyUser content"
// @Success 200 {object} models.CompanyUser
// @Failure 403 :id is not int
// @router /:id [put]
func (c *CompanyUserController) Put() {
	idStr := c.Ctx.Input.Param(":id")
	id, _ := strconv.Atoi(idStr)

	if currentUser.Role != constants.RoleAdmin && id != currentUser.Id {
		c.ServeJSONError("You can only edit your own userdata!")
	}

	v := models.CompanyUser{Id: id}
	if err := json.Unmarshal(c.Ctx.Input.RequestBody, &v); err == nil {
		v.ModifiedBy = int64(currentUser.Id)
		if err := models.UpdateCompanyUserById(o, &v); err == nil {
			c.ServeJSONSuccess("Ok")
		} else {
			c.ServeJSONErrorWithError("Error", err)
		}
	} else {
		c.ServeJSONErrorWithError("Error", err)
	}
	c.ServeJSON()
}

// Delete ...
// @Title Delete
// @Description delete the CompanyUser
// @Param	id		path 	string	true		"The id you want to delete"
// @Success 200 {string} delete success!
// @Failure 403 id is empty
// @router /:id [delete]
func (c *CompanyUserController) Delete() {
	idStr := c.Ctx.Input.Param(":id")
	id, _ := strconv.Atoi(idStr)

	if currentUser.Role != constants.RoleAdmin && currentUser.Id != id {
		c.ServeJSONError("You can not delete users other than yourself!")
		c.ServeJSON()
	}

	if currentUser.Role == constants.RoleOwner {
		c.ServeJSONError("You can not delete users other than yourself!")
		c.ServeJSON()
	}

	uExists, err := models.GetCompanyUserById(o, id)
	if uExists == nil {
		c.ServeJSONError("Error: User does not exist!")
		return
	}

	err = models.DeleteCompanyUser(o, id)
	if err != nil {
		c.ServeJSONError("Failed to delete company User")
	}

	systemDB := companydb.GetSystemDatabase()
	systemO, err := orm.NewOrmWithDB("postgres", "default", systemDB)

	// After deleting the user here we need to delete the same User in the system DB
	userCompanyMapping, err := models.GetUserCompanyMapByCompanyAndCID(systemO, jwtSession.CompanyName, int16(id))
	if err != nil {
		c.ServeJSONError("Error deleting Company User")
		return
	}

	err = models.DeleteUserCompanyMap(systemO, userCompanyMapping.ID)
	if err != nil {
		c.ServeJSONError("Error deleting User Company Relation")
		return
	} else {
		c.ServeJSONSuccess("Successfully deleted!")
	}
}

// DeleteCompany ...
// @Title Delete Company
// @Description Delete the entire Company
// @Success 200 {string} delete success!
// @Failure 403 failed
// @router /deletecompany [delete]
func (c *CompanyUserController) DeleteCompany() {

	if currentUser.Role != constants.RoleOwner {
		c.ServeJSONError("Must be Owner to delete a company")
		return
	}

	systemDB := companydb.GetSystemDatabase()
	systemO, err := orm.NewOrmWithDB("postgres", "default", systemDB)

	// first check how many users are left
	ucm, err := models.GetUserCompanyMapsByCompanyName(systemO, jwtSession.CompanyName)
	if err != nil {
		c.ServeJSONError("Error deleting User Company Relation")
		return
	}

	for _, uc := range ucm {
		systemO.Begin()
		err = models.DeleteUserCompanyMap(systemO, uc.ID)
		if err != nil {
			c.ServeJSONError("Error deleting User Company Relation")
			systemO.Rollback()
			return
		}
	}

	// Second check and delete the database
	err = companydb.DeleteDatabase(jwtSession.CompanyName)
	if err != nil {
		systemO.Rollback()
		c.ServeJSONError("Error deleting Company Database")
		return
	} else {
		systemO.Commit()
		c.ServeJSONSuccess("Successfully deleted!")
	}

}