// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

package api4

import (
	"net/http"
	"strconv"

	"github.com/mattermost/mattermost-server/v5/audit"
	"github.com/mattermost/mattermost-server/v5/model"
	"github.com/mattermost/mattermost-server/v5/store"
)

func (api *API) InitUserLocal() {
	api.BaseRoutes.Users.Handle("", api.ApiLocal(localGetUsers)).Methods("GET")
	api.BaseRoutes.Users.Handle("", api.ApiLocal(localPermanentDeleteAllUsers)).Methods("DELETE")
	api.BaseRoutes.Users.Handle("", api.ApiLocal(createUser)).Methods("POST")
	api.BaseRoutes.Users.Handle("/password/reset/send", api.ApiLocal(sendPasswordReset)).Methods("POST")
	api.BaseRoutes.Users.Handle("/ids", api.ApiLocal(localGetUsersByIds)).Methods("POST")

	api.BaseRoutes.User.Handle("", api.ApiLocal(localGetUser)).Methods("GET")
	api.BaseRoutes.User.Handle("", api.ApiLocal(updateUser)).Methods("PUT")
	api.BaseRoutes.User.Handle("", api.ApiLocal(localDeleteUser)).Methods("DELETE")
	api.BaseRoutes.User.Handle("/roles", api.ApiLocal(updateUserRoles)).Methods("PUT")
	api.BaseRoutes.User.Handle("/mfa", api.ApiLocal(updateUserMfa)).Methods("PUT")
	api.BaseRoutes.User.Handle("/active", api.ApiLocal(updateUserActive)).Methods("PUT")
	api.BaseRoutes.User.Handle("/password", api.ApiLocal(updatePassword)).Methods("PUT")
	api.BaseRoutes.User.Handle("/convert_to_bot", api.ApiLocal(convertUserToBot)).Methods("POST")
	api.BaseRoutes.User.Handle("/email/verify/member", api.ApiLocal(verifyUserEmailWithoutToken)).Methods("POST")

	api.BaseRoutes.UserByUsername.Handle("", api.ApiLocal(localGetUserByUsername)).Methods("GET")
	api.BaseRoutes.UserByEmail.Handle("", api.ApiLocal(localGetUserByEmail)).Methods("GET")

	api.BaseRoutes.Users.Handle("/tokens/revoke", api.ApiLocal(revokeUserAccessToken)).Methods("POST")
	api.BaseRoutes.User.Handle("/tokens", api.ApiLocal(getUserAccessTokensForUser)).Methods("GET")
	api.BaseRoutes.User.Handle("/tokens", api.ApiLocal(createUserAccessToken)).Methods("POST")

	api.BaseRoutes.Users.Handle("/migrate_auth/ldap", api.ApiLocal(migrateAuthToLDAP)).Methods("POST")
	api.BaseRoutes.Users.Handle("/migrate_auth/saml", api.ApiLocal(migrateAuthToSaml)).Methods("POST")
}

func localGetUsers(c *Context, w http.ResponseWriter, r *http.Request) {
	inTeamId := r.URL.Query().Get("in_team")
	notInTeamId := r.URL.Query().Get("not_in_team")
	inChannelId := r.URL.Query().Get("in_channel")
	notInChannelId := r.URL.Query().Get("not_in_channel")
	groupConstrained := r.URL.Query().Get("group_constrained")
	withoutTeam := r.URL.Query().Get("without_team")
	active := r.URL.Query().Get("active")
	inactive := r.URL.Query().Get("inactive")
	role := r.URL.Query().Get("role")
	sort := r.URL.Query().Get("sort")

	if len(notInChannelId) > 0 && len(inTeamId) == 0 {
		c.SetInvalidUrlParam("team_id")
		return
	}

	if sort != "" && sort != "last_activity_at" && sort != "create_at" && sort != "status" {
		c.SetInvalidUrlParam("sort")
		return
	}

	// Currently only supports sorting on a team
	// or sort="status" on inChannelId
	if (sort == "last_activity_at" || sort == "create_at") && (inTeamId == "" || notInTeamId != "" || inChannelId != "" || notInChannelId != "" || withoutTeam != "") {
		c.SetInvalidUrlParam("sort")
		return
	}
	if sort == "status" && inChannelId == "" {
		c.SetInvalidUrlParam("sort")
		return
	}

	withoutTeamBool, _ := strconv.ParseBool(withoutTeam)
	groupConstrainedBool, _ := strconv.ParseBool(groupConstrained)
	activeBool, _ := strconv.ParseBool(active)
	inactiveBool, _ := strconv.ParseBool(inactive)

	userGetOptions := &model.UserGetOptions{
		InTeamId:         inTeamId,
		InChannelId:      inChannelId,
		NotInTeamId:      notInTeamId,
		NotInChannelId:   notInChannelId,
		GroupConstrained: groupConstrainedBool,
		WithoutTeam:      withoutTeamBool,
		Active:           activeBool,
		Inactive:         inactiveBool,
		Role:             role,
		Sort:             sort,
		Page:             c.Params.Page,
		PerPage:          c.Params.PerPage,
		ViewRestrictions: nil,
	}

	var err *model.AppError
	var profiles []*model.User
	etag := ""

	if withoutTeamBool, _ := strconv.ParseBool(withoutTeam); withoutTeamBool {
		profiles, err = c.App.GetUsersWithoutTeamPage(userGetOptions, c.IsSystemAdmin())
	} else if len(notInChannelId) > 0 {
		profiles, err = c.App.GetUsersNotInChannelPage(inTeamId, notInChannelId, groupConstrainedBool, c.Params.Page, c.Params.PerPage, c.IsSystemAdmin(), nil)
	} else if len(notInTeamId) > 0 {
		etag = c.App.GetUsersNotInTeamEtag(inTeamId, "")
		if c.HandleEtag(etag, "Get Users Not in Team", w, r) {
			return
		}

		profiles, err = c.App.GetUsersNotInTeamPage(notInTeamId, groupConstrainedBool, c.Params.Page, c.Params.PerPage, c.IsSystemAdmin(), nil)
	} else if len(inTeamId) > 0 {
		if sort == "last_activity_at" {
			profiles, err = c.App.GetRecentlyActiveUsersForTeamPage(inTeamId, c.Params.Page, c.Params.PerPage, c.IsSystemAdmin(), nil)
		} else if sort == "create_at" {
			profiles, err = c.App.GetNewUsersForTeamPage(inTeamId, c.Params.Page, c.Params.PerPage, c.IsSystemAdmin(), nil)
		} else {
			etag = c.App.GetUsersInTeamEtag(inTeamId, "")
			if c.HandleEtag(etag, "Get Users in Team", w, r) {
				return
			}
			profiles, err = c.App.GetUsersInTeamPage(userGetOptions, c.IsSystemAdmin())
		}
	} else if len(inChannelId) > 0 {
		if sort == "status" {
			profiles, err = c.App.GetUsersInChannelPageByStatus(userGetOptions, c.IsSystemAdmin())
		} else {
			profiles, err = c.App.GetUsersInChannelPage(userGetOptions, c.IsSystemAdmin())
		}
	} else {
		profiles, err = c.App.GetUsersPage(userGetOptions, c.IsSystemAdmin())
	}

	if err != nil {
		c.Err = err
		return
	}

	if len(etag) > 0 {
		w.Header().Set(model.HEADER_ETAG_SERVER, etag)
	}
	w.Write([]byte(model.UserListToJson(profiles)))
}

func localGetUsersByIds(c *Context, w http.ResponseWriter, r *http.Request) {
	userIds := model.ArrayFromJson(r.Body)

	if len(userIds) == 0 {
		c.SetInvalidParam("user_ids")
		return
	}

	sinceString := r.URL.Query().Get("since")

	options := &store.UserGetByIdsOpts{
		IsAdmin: c.IsSystemAdmin(),
	}

	if len(sinceString) > 0 {
		since, parseError := strconv.ParseInt(sinceString, 10, 64)
		if parseError != nil {
			c.SetInvalidParam("since")
			return
		}
		options.Since = since
	}

	users, err := c.App.GetUsersByIds(userIds, options)
	if err != nil {
		c.Err = err
		return
	}

	w.Write([]byte(model.UserListToJson(users)))
}

func localGetUser(c *Context, w http.ResponseWriter, r *http.Request) {
	c.RequireUserId()
	if c.Err != nil {
		return
	}

	user, err := c.App.GetUser(c.Params.UserId)
	if err != nil {
		c.Err = err
		return
	}

	userTermsOfService, err := c.App.GetUserTermsOfService(user.Id)
	if err != nil && err.StatusCode != http.StatusNotFound {
		c.Err = err
		return
	}

	if userTermsOfService != nil {
		user.TermsOfServiceId = userTermsOfService.TermsOfServiceId
		user.TermsOfServiceCreateAt = userTermsOfService.CreateAt
	}

	etag := user.Etag(*c.App.Config().PrivacySettings.ShowFullName, *c.App.Config().PrivacySettings.ShowEmailAddress)

	if c.HandleEtag(etag, "Get User", w, r) {
		return
	}

	c.App.SanitizeProfile(user, c.IsSystemAdmin())
	w.Header().Set(model.HEADER_ETAG_SERVER, etag)
	w.Write([]byte(user.ToJson()))
}

func localDeleteUser(c *Context, w http.ResponseWriter, r *http.Request) {
	c.RequireUserId()
	if c.Err != nil {
		return
	}

	userId := c.Params.UserId

	auditRec := c.MakeAuditRecord("localDeleteUser", audit.Fail)
	defer c.LogAuditRec(auditRec)

	user, err := c.App.GetUser(userId)
	if err != nil {
		c.Err = err
		return
	}
	auditRec.AddMeta("user", user)

	if c.Params.Permanent {
		err = c.App.PermanentDeleteUser(user)
	} else {
		_, err = c.App.UpdateActive(user, false)
	}
	if err != nil {
		c.Err = err
		return
	}

	auditRec.Success()
	ReturnStatusOK(w)
}

func localPermanentDeleteAllUsers(c *Context, w http.ResponseWriter, r *http.Request) {
	auditRec := c.MakeAuditRecord("localPermanentDeleteAllUsers", audit.Fail)
	defer c.LogAuditRec(auditRec)

	if err := c.App.PermanentDeleteAllUsers(); err != nil {
		c.Err = err
		return
	}

	auditRec.Success()
	ReturnStatusOK(w)
}

func localGetUserByUsername(c *Context, w http.ResponseWriter, r *http.Request) {
	c.RequireUsername()
	if c.Err != nil {
		return
	}

	user, err := c.App.GetUserByUsername(c.Params.Username)
	if err != nil {
		c.Err = err
		return
	}

	userTermsOfService, err := c.App.GetUserTermsOfService(user.Id)
	if err != nil && err.StatusCode != http.StatusNotFound {
		c.Err = err
		return
	}

	if userTermsOfService != nil {
		user.TermsOfServiceId = userTermsOfService.TermsOfServiceId
		user.TermsOfServiceCreateAt = userTermsOfService.CreateAt
	}

	etag := user.Etag(*c.App.Config().PrivacySettings.ShowFullName, *c.App.Config().PrivacySettings.ShowEmailAddress)

	if c.HandleEtag(etag, "Get User", w, r) {
		return
	}

	c.App.SanitizeProfile(user, c.IsSystemAdmin())
	w.Header().Set(model.HEADER_ETAG_SERVER, etag)
	w.Write([]byte(user.ToJson()))
}

func localGetUserByEmail(c *Context, w http.ResponseWriter, r *http.Request) {
	c.SanitizeEmail()
	if c.Err != nil {
		return
	}

	sanitizeOptions := c.App.GetSanitizeOptions(c.IsSystemAdmin())
	if !sanitizeOptions["email"] {
		c.Err = model.NewAppError("getUserByEmail", "api.user.get_user_by_email.permissions.app_error", nil, "userId="+c.App.Session().UserId, http.StatusForbidden)
		return
	}

	user, err := c.App.GetUserByEmail(c.Params.Email)
	if err != nil {
		c.Err = err
		return
	}

	etag := user.Etag(*c.App.Config().PrivacySettings.ShowFullName, *c.App.Config().PrivacySettings.ShowEmailAddress)

	if c.HandleEtag(etag, "Get User", w, r) {
		return
	}

	c.App.SanitizeProfile(user, c.IsSystemAdmin())
	w.Header().Set(model.HEADER_ETAG_SERVER, etag)
	w.Write([]byte(user.ToJson()))
}