// Copyright 2016 Documize Inc. <legal@documize.com>. All rights reserved.
//
// This software (Documize Community Edition) is licensed under
// GNU AGPL v3 http://www.gnu.org/licenses/agpl-3.0.en.html
//
// You can operate outside the AGPL restrictions by purchasing
// Documize Enterprise Edition and obtaining a commercial license
// by contacting <sales@documize.com>.
//
// https://documize.com

package database

import (
	"errors"
	"net/http"
	"time"

	"github.com/documize/community/core/api/plugins"
	"github.com/documize/community/core/env"
	"github.com/documize/community/core/secrets"
	"github.com/documize/community/core/stringutil"
	"github.com/documize/community/core/uniqueid"
	"github.com/documize/community/domain/store"
	"github.com/documize/community/server/web"
)

// Handler contains the runtime information such as logging and database.
type Handler struct {
	Runtime *env.Runtime
	Store   *store.Store
}

// Setup the tables in a blank database
func (h *Handler) Setup(w http.ResponseWriter, r *http.Request) {
	defer func() {
		target := "/setup"
		status := http.StatusBadRequest

		if h.Runtime.Flags.SiteMode == env.SiteModeNormal {
			target = "/"
			status = http.StatusOK
		}

		req, err := http.NewRequest("GET", target, nil)
		if err != nil {
			h.Runtime.Log.Error("database.Setup error in defer ", err)
		}

		http.Redirect(w, req, target, status)
	}()

	err := r.ParseForm()
	if err != nil {
		h.Runtime.Log.Error("database.Setup r.ParseForm()", err)
		return
	}

	dbname := r.Form.Get("dbname")
	dbhash := r.Form.Get("dbhash")

	if dbname != web.SiteInfo.DBname || dbhash != web.SiteInfo.DBhash {
		h.Runtime.Log.Error("database.Setup security credentials error ", errors.New("bad db name or validation code"))
		return
	}

	details := onboardRequest{
		URL:         "",
		Company:     r.Form.Get("title"),
		CompanyLong: r.Form.Get("title"),
		Message:     r.Form.Get("message"),
		Email:       r.Form.Get("email"),
		Password:    r.Form.Get("password"),
		Firstname:   r.Form.Get("firstname"),
		Lastname:    r.Form.Get("lastname"),
		Revised:     time.Now().UTC(),
	}

	if details.Company == "" ||
		details.CompanyLong == "" ||
		details.Message == "" ||
		details.Email == "" ||
		details.Password == "" ||
		details.Firstname == "" ||
		details.Lastname == "" {
		h.Runtime.Log.Error("database.Setup error ", errors.New("required field in database set-up form blank"))
		return
	}

	if err = InstallUpgrade(h.Runtime, false); err != nil {
		h.Runtime.Log.Error("database.Setup migrate", err)
		return
	}

	err = setupAccount(h.Runtime, details, secrets.GenerateSalt())
	if err != nil {
		h.Runtime.Log.Error("database.Setup setup account ", err)
		return
	}

	h.Runtime.Flags.SiteMode = env.SiteModeNormal

	err = plugins.Setup(h.Store)
	if err != nil {
		h.Runtime.Log.Error("database.Setup plugin setup failed", err)
	}
}

// The result of completing the onboarding process.
type onboardRequest struct {
	URL         string
	Company     string
	CompanyLong string
	Message     string
	Email       string
	Password    string
	Firstname   string
	Lastname    string
	Revised     time.Time
}

// setupAccount prepares the database for a newly onboard customer.
// Once done, they can then login and use Documize.
func setupAccount(rt *env.Runtime, completion onboardRequest, serial string) (err error) {
	tx, err := rt.Db.Beginx()
	if err != nil {
		rt.Log.Error("setup - failed to get transaction", err)
		return
	}

	//accountTitle := "This is where you will find documentation for your all projects. You can customize this message from the settings screen."
	salt := secrets.GenerateSalt()
	password := secrets.GeneratePassword(completion.Password, salt)

	// Allocate organization to the user.
	orgID := uniqueid.Generate()
	_, err = tx.Exec(RebindParams("INSERT INTO dmz_org (c_refid, c_company, c_title, c_message, c_domain, c_email, c_serial) VALUES (?, ?, ?, ?, ?, ?, ?)", rt.StoreProvider.Type()),
		orgID, completion.Company, completion.CompanyLong, completion.Message, completion.URL, completion.Email, serial)
	if err != nil {
		rt.Log.Error("INSERT INTO dmz_org failed", err)
		tx.Rollback()
		return
	}

	// Create user.
	userID := uniqueid.Generate()
	_, err = tx.Exec(RebindParams("INSERT INTO dmz_user (c_refid, c_firstname, c_lastname, c_email, c_initials, c_salt, c_password, c_globaladmin) VALUES (?, ?, ?, ?, ?, ?, ?, ?)", rt.StoreProvider.Type()),
		userID, completion.Firstname, completion.Lastname, completion.Email, stringutil.MakeInitials(completion.Firstname, completion.Lastname), salt, password, 1)
	if err != nil {
		rt.Log.Error("INSERT INTO dmz_user failed", err)
		tx.Rollback()
		return
	}

	// Link user to organization.
	accountID := uniqueid.Generate()
	_, err = tx.Exec(RebindParams("INSERT INTO dmz_user_account (c_refid, c_userid, c_orgid, c_admin, c_editor, c_users, c_analytics) VALUES (?, ?, ?, ?, ?, ?, ?)", rt.StoreProvider.Type()),
		accountID, userID, orgID, 1, 1, 1, 1)
	if err != nil {
		rt.Log.Error("INSERT INTO dmz_user_account failed", err)
		tx.Rollback()
		return
	}

	// Create space.
	labelID := uniqueid.Generate()
	_, err = tx.Exec(RebindParams("INSERT INTO dmz_space (c_refid, c_orgid, c_userid, c_name, c_type) VALUES (?, ?, ?, ?, ?)", rt.StoreProvider.Type()),
		labelID, orgID, userID, "Welcome", 2)
	if err != nil {
		rt.Log.Error("INSERT INTO dmz_space failed", err)
		tx.Rollback()
		return
	}

	// Assign permissions to space.
	perms := []string{"view", "manage", "own", "doc-add", "doc-edit", "doc-delete", "doc-move", "doc-copy", "doc-template", "doc-approve", "doc-version", "doc-lifecycle"}
	for _, p := range perms {
		_, err = tx.Exec(RebindParams("INSERT INTO dmz_permission (c_orgid, c_who, c_whoid, c_action, c_scope, c_location, c_refid) VALUES (?, ?, ?, ?, ?, ?, ?)", rt.StoreProvider.Type()),
			orgID, "user", userID, p, "object", "space", labelID)
		if err != nil {
			rt.Log.Error("INSERT INTO dmz_permission failed", err)
			tx.Rollback()
			return
		}
	}

	// Create some user groups.
	groupDevID := uniqueid.Generate()
	_, err = tx.Exec(RebindParams("INSERT INTO dmz_group (c_refid, c_orgid, c_name, c_desc) VALUES (?, ?, ?, ?)", rt.StoreProvider.Type()),
		groupDevID, orgID, "Technology", "On-site and remote development teams")
	if err != nil {
		rt.Log.Error("INSERT INTO dmz_group failed", err)
		tx.Rollback()
		return
	}

	groupProjectID := uniqueid.Generate()
	_, err = tx.Exec(RebindParams("INSERT INTO dmz_group (c_refid, c_orgid, c_name, c_desc) VALUES (?, ?, ?, ?)", rt.StoreProvider.Type()),
		groupProjectID, orgID, "Project Management", "HQ PMO and Account Management departments")
	if err != nil {
		rt.Log.Error("INSERT INTO dmz_group failed", err)
		tx.Rollback()
		return
	}

	groupBackofficeID := uniqueid.Generate()
	_, err = tx.Exec(RebindParams("INSERT INTO dmz_group (c_refid, c_orgid, c_name, c_desc) VALUES (?, ?, ?, ?)", rt.StoreProvider.Type()),
		groupBackofficeID, orgID, "Back Office", "Finance and HR people")
	if err != nil {
		rt.Log.Error("INSERT INTO dmz_group failed", err)
		tx.Rollback()
		return
	}

	// Join the user groups.
	_, err = tx.Exec(RebindParams("INSERT INTO dmz_group_member (c_orgid, c_groupid, c_userid) VALUES (?, ?, ?)", rt.StoreProvider.Type()),
		orgID, groupDevID, userID)
	if err != nil {
		rt.Log.Error("INSERT INTO dmz_group_member failed", err)
		tx.Rollback()
		return
	}
	_, err = tx.Exec(RebindParams("INSERT INTO dmz_group_member (c_orgid, c_groupid, c_userid) VALUES (?, ?, ?)", rt.StoreProvider.Type()),
		orgID, groupProjectID, userID)
	if err != nil {
		rt.Log.Error("INSERT INTO dmz_group_member failed", err)
		tx.Rollback()
		return
	}
	_, err = tx.Exec(RebindParams("INSERT INTO dmz_group_member (c_orgid, c_groupid, c_userid) VALUES (?, ?, ?)", rt.StoreProvider.Type()),
		orgID, groupBackofficeID, userID)
	if err != nil {
		rt.Log.Error("INSERT INTO dmz_group_member failed", err)
		tx.Rollback()
		return
	}

	// Finish up.
	if err = tx.Commit(); err != nil {
		rt.Log.Error("setup - unable to commit sql", err)
		return
	}

	return
}