import fs from 'fs'
import async from 'async'
import bcrypt from 'bcryptjs'
import * as passportSaml from 'passport-saml'
import dbconn from '../config/dbconn'
import methods from '../functions/methods'
import gitlab from '../functions/gitlab'
import constants from '../config/const'
import mailer from '../config/mailer'
import portalUser from '../classes/user'
import projectInformation from '../classes/website'
import projectRepo from '../classes/repo'

const SamlStrategy = passportSaml.Strategy
const saltRounds = 10;
const salt = 64; // salt length
const logoDir = 'public/upload/'
const defaultLogo:any = 'public/default/logo.png'

export = function (app:any, config:any, passport:any, lang:string) {

  // =========== PASSPORT =======
  passport.serializeUser(function (user:any, done:any) {
    done(null, user);
  });

  passport.deserializeUser(function (user:any, done:any) {
    done(null, user);
  });

  var samlStrategy = new SamlStrategy({
      // URL that goes from the Identity Provider -> Service Provider
      callbackUrl: config.passport.saml.path,
      // Base address to call logout requests
      logoutUrl: config.passport.saml.logoutUrl,
      
      entryPoint: config.passport.saml.entryPoint,
      issuer: config.passport.saml.issuer,
      identifierFormat: undefined,
      
      // Service Provider private key
      decryptionPvk: fs.readFileSync(__dirname + '/cert/key.pem', 'utf8'),
      // Service Provider Certificate
      privateKey: fs.readFileSync(__dirname + '/cert/key.pem', 'utf8'),
      // Identity Provider's public key
      cert: fs.readFileSync(__dirname + '/cert/cert_idp.pem', 'utf8'),
      
      validateInResponseTo: false,
      disableRequestedAuthnContext: true
  },
  function (profile:any, done:any) {
    return done(null, {
      id: profile.nameID,
      idFormat: profile.nameIDFormat,
      email: profile.email,
      firstName: profile.givenName,
      lastName: profile.sn
    });
  });
  
  passport.use(samlStrategy);

  // ============= SAML ==============
  app.post(config.passport.saml.path,
    passport.authenticate(config.passport.strategy,
      {
        failureRedirect: '/account/',
        failureFlash: true
      }),
    function (req:any, res:any) {
      res.redirect('/account/');
    }
  );

  // to generate Service Provider's XML metadata
  app.get('/saml/metadata',
    function(req:any, res:any) {
      res.type('application/xml');
      var spMetadata = samlStrategy.generateServiceProviderMetadata(fs.readFileSync(__dirname + '/cert/cert.pem', 'utf8'));
      res.status(200).send(spMetadata);
    }
  );

  // ======== APP ROUTES - ACCOUNT ====================

  async function getLoggedInUserData(email:string) {
    let user = await methods.getUserByEmail(email)
    if (!user) {
      console.log('no user found')
      return null
    } else {
      let loggedInUser = new portalUser(
        user.id, email, user.salutation, user.title, user.firstname, user.lastname, user.industry, user.organisation, user.speciality, user.m4lab_idp, user.verificationStatus
      )
      
      let userGitlabId = await methods.getGitlabId(loggedInUser.id)
      if (userGitlabId) {
        loggedInUser.setGitlabUserId(userGitlabId)
      }
      return loggedInUser
    }
  }

  app.get('/', async function (req:any, res:any) {
    if ( !req.isAuthenticated() ) {
      res.redirect('/login')
    } else {
      let loggedInUser = await getLoggedInUserData(req.user.email)
      if (!loggedInUser) {
        console.error("user data is not found")
        res.status(500).render(lang+'/500', { error: "Your data is not found. Please try again." })
      } else {
        res.render(lang+'/account/home', {
          user: loggedInUser
        });
      }
    }
  });

  app.get('/login',
    passport.authenticate(config.passport.strategy, {
      successRedirect: '/',
      failureRedirect: '/login'
    })
  )

  app.get('/logout', function (req:any, res:any) {
    if (req.user == null) {
      return res.redirect('/');
    }

    req.user.nameID = req.user.id;
    req.user.nameIDFormat = req.user.idFormat;
    return samlStrategy.logout(req, function(err:any, uri:any) {
      req.logout();

      if ( req.session ) {
        req.session.destroy((err:any) => {
          if(err) {
              return console.log(err);
          }
        });
      }

      return res.redirect(uri);
    });
  });

  app.get('/profile', async function (req:any, res:any) {
    if ( !req.isAuthenticated() ) {
      res.redirect('/login')
    } else {
      let loggedInUser = await getLoggedInUserData(req.user.email)
      if (!loggedInUser) { // null user
        res.redirect('/account/')
      } else {
        if(loggedInUser.getVerificationStatus() != 1) {
          res.redirect('/account/')
        } else {
          res.render(lang+'/account/profile', {
            user: loggedInUser
          })
        }
      }
      
    }
  })

  app.get('/services', async function(req:any, res:any){
    if( !req.isAuthenticated() ) {
      res.redirect('/login')
    } else {
      let loggedInUser = await getLoggedInUserData(req.user.email)
      if (!loggedInUser) { // null user
        res.redirect('/account/')
      } else {
        if(loggedInUser.getVerificationStatus() != 1) { // unverified users
          res.redirect('/account/')
        } else {
          let gitlabReposArr = []
          let gitlabPagesArr = []
  
          if(loggedInUser.getGitlabUserId()) { // for users who have activated their gitlab account
            let userProjects = await gitlab.getUserProjects(loggedInUser.getGitlabUserId()!)
            if (!userProjects) {
              console.error("something went wrong")
              res.status(500).render(lang+'/500', { error: "something went wrong" })
            }
            
            let project:any
            for (project in userProjects) {
              if (userProjects[project].tag_list.includes('website')) {
                let page = {
                  projectInformation: new projectInformation(loggedInUser.getGitlabUserId()!, userProjects[project].name, userProjects[project].description,
                    userProjects[project].id, userProjects[project].avatar_url, userProjects[project].path_with_namespace),
                  pipelineStatus: await gitlab.getProjectPipelineLatestStatus(userProjects[project].id)
                }
                gitlabPagesArr.push(page)
              } else {
                let repo = new projectRepo(loggedInUser.getGitlabUserId()!, userProjects[project].name, userProjects[project].description,
                  userProjects[project].id, userProjects[project].avatar_url, userProjects[project].path_with_namespace)
                gitlabReposArr.push(repo)
              }
            }
  
            res.render(lang+'/account/services', {
              user: loggedInUser,
              gitlabRepos: gitlabReposArr,
              gitlabPages: gitlabPagesArr
            })
          } else { // for users who have not activated their gitlab account yet
            let gitlabUser = await gitlab.getUserByEmail(loggedInUser.getEmail())
            if (!gitlabUser) {
              res.render(lang+'/account/services', {
                user: loggedInUser,
                gitlabRepos: null,
                gitlabPages: null
              })
            } else {
              let gitlabActivationData = {
                user_id: loggedInUser.getId(),
                gitlab_userId: gitlabUser.id}

              methods.addGitlabUser(gitlabActivationData, function(err:any){
                if(err) {
                  res.status(500).render(lang+'/500', { error: err })
                } else {
                  res.redirect('/account/services')
                }
              })
            }
          }
        }
      }
    }
  })

  app.get('/security', async function (req:any, res:any) {
    if ( !req.isAuthenticated() ) {
      res.redirect('/login')
    } else {
      let loggedInUser = await getLoggedInUserData(req.user.email)
      if (!loggedInUser) { // null user
        res.redirect('/account/')
      } else {
        if(loggedInUser.getVerificationStatus() == 1 && loggedInUser.getIdpStatus() == 1) {
          res.render(lang+'/account/security', {
            user: loggedInUser
          })
        } else {
          res.redirect('/account/')
        }
      }
    }
  })

  app.post('/updateProfile', async function (req:any, res:any) {
    if ( !req.isAuthenticated() ) {
      res.redirect('/login')
    } else {
      let loggedInUser = await getLoggedInUserData(req.user.email)
      if (!loggedInUser) { // null user
        res.redirect('/account/')
      } else {
        let userData = {
          salutation: req.body.inputSalutation,
          title: req.body.inputTitle,
          firstname: req.body.inputFirstname,
          lastname: req.body.inputLastname,
          email: req.body.inputEmail,
          organisation: req.body.inputOrganisation,
          industry: req.body.inputIndustry,
          speciality: req.body.inputSpeciality,
        }
        let result = await methods.updateUserById(loggedInUser.getId(), userData)
        if (!result) {
          res.flash('error', "Failed")
        } else {
          loggedInUser.updateProfile(userData.salutation, userData.title, userData.firstname, userData.lastname, userData.email,
            userData.organisation, userData.industry, userData.speciality)
          res.flash('success', 'Ihr Benutzerprofil wurde aktualisiert!')
        }
        res.redirect('/account/profile')
      }
      
    }
  });

  app.post('/changePwd', async function (req:any, res:any) {
    if( !req.isAuthenticated() ) {
      res.redirect('/login')
    } else {
      let loggedInUser = await getLoggedInUserData(req.user.email)

      if (!loggedInUser) { // null user
        res.redirect('/account/')
      } else {
        let currPwd = req.body.inputCurrPwd
        let newPwd = req.body.inputNewPwd
        let retypePwd = req.body.inputConfirm

        dbconn.user.query('SELECT password FROM credential WHERE user_id='+loggedInUser.getId(), function (err:any, rows:any) {
          if (err) {
            console.error(err)
            res.status(500).render(lang+'/500', { error: err })
          }
          let userPwd = rows[0].password

          // check if the password is correct
          bcrypt.compare(currPwd, userPwd, function(err, isMatch) {
            if (err) {
              console.error(err)
              res.status(500).render(lang+'/500', { error: err })
            } else if (!isMatch) {
              res.flash('error', "Das Passwort ist leider falsch. Bitte überprüfen Sie Ihre Eingabe.")
              res.redirect('/account/security')
            } else {
              if ( newPwd != retypePwd ) {
                res.flash('error', 'Passwörter stimmen nicht überein. Bitte stellen Sie sicher, dass Sie das Passwort beide Male genau gleich eingeben.')
                res.redirect('/account/security')
              } else {
                // update password
                bcrypt.genSalt(saltRounds, function(err, salt) {
                  bcrypt.hash(newPwd, salt, async function(err, hash) {
                    var credentialData = {
                      password: hash,
                      user_id: loggedInUser!.getId()
                    }
                
                    let result = await methods.updateCredential(credentialData)
                    if (!result) {
                      console.log('Failed to reset password')
                      res.flash('error', "Datenbankfehler: Passwort kann nicht geändert werden.")
                    } else {
                      res.flash('success', "Passwort aktualisiert!")
                      // send notifiaction email
                      mailer.options.to = loggedInUser!.getEmail()
                      mailer.options.subject = constants.updatePasswordMailSubject
                      mailer.options.html = constants.updatePasswordMailContent+'<div>'+constants.mailSignature+'</div>'
                      mailer.transporter.sendMail(mailer.options, function(err:any) {
                        if (err) { console.log(err) }
                      })
                    }
                    res.redirect('/account/security')

                  });
                });
              }
            }
          })
        })
      }
    }
  });
  
  app.get('/resendVerificationEmail', async function(req:any, res:any){
    if (!req.isAuthenticated) {
      res.redirect('/login')
    } else {
      let loggedInUser = await getLoggedInUserData(req.user.email)
      if (!loggedInUser) {
        res.redirect('/login')
      } else {
        let token = await methods.getVerificationTokenByUserId(loggedInUser.id)
        if (!token) {
          res.send(false)
        } else {
          // send email
          var emailSubject = "Bitte bestätigen Sie Ihr M4_LAB Benutzerkonto"
          var emailContent = '<div>Lieber Nutzer,<br/><br/>' +
            '<p>vielen Dank für Ihre Anmeldung am Transferportal der HFT Stuttgart. <br/>' +
            'Um Ihre Anmeldung zu bestätigen, klicken Sie bitte diesen Link: ' + config.app.host + '/verifyAccount?token=' + token +
            '<br/><br/>' +
            'Ohne Bestätigung Ihres Kontos müssen wir Ihr Konto leider nach 7 Tagen löschen.</p><br/>' + constants.mailSignature +
            '</div>';
          mailer.options.to = loggedInUser.email;
          mailer.options.subject = emailSubject;
          mailer.options.html = emailContent;
          mailer.transport.sendMail(mailer.options, function(err:any) {
            if (err) {
              console.log('cannot send email')
              throw err
            }
          })
          res.send(true)
        }
      }
    }
  })

  // ============= NEW GITLAB PAGES ===========================
  
  app.get('/newInformation', async function(req:any, res:any){
    if ( !req.isAuthenticated() ) {
      res.redirect('/login')
    } else {
      let loggedInUser = await getLoggedInUserData(req.user.email)
      if (!loggedInUser) {
        res.redirect('/login')
      } else {
        let gitlabUser = await gitlab.getUserByEmail(loggedInUser.getEmail())
        if (!gitlabUser) { // no user found
          res.redirect('/account/services')
        } else {
          res.render(lang+'/account/newInformation', {
            user: loggedInUser,
            gitlabUsername: gitlabUser.username
          })
        }
      }
    }
  })
  app.post('/newInformation', async function(req:any, res:any) {
    if( !req.isAuthenticated() ) {
      res.redirect('/login')
    } else {
      let loggedInUser = await getLoggedInUserData(req.user.email)
      if (!loggedInUser) {
        res.redirect('/login')
      } else {
        if (!req.body.name && !req.body.description) {
          res.flash('error', 'Bitte geben Sie die benötigten Daten ein')
          res.redirect('/account/newInformation')
        } else {
          let projectName = req.body.name.toLowerCase().replace(/\s/g, '-')
          let projectDesc = req.body.description
          let projectTemplate = req.body.template
          let newInformation = new projectInformation(loggedInUser.getGitlabUserId()!, projectName, projectDesc)
          let newLogoFile = defaultLogo
            
          if (req.files) { newLogoFile = req.files.logo }
  
          async.waterfall([
            function(callback:any){ // upload logo
              if (!req.files) {
                callback(null, newLogoFile)
              } else {
                newLogoFile.mv(logoDir + newLogoFile.name, function(err:any) {
                  newLogoFile = logoDir+newLogoFile.name
                  callback(err, newLogoFile)
                })
              }
            },
            async function(newLogoFile:any){ // create a new GitLab Page
              let newPages = await gitlab.createNewPages(newInformation, newLogoFile, projectTemplate)
              if (newPages.status) {
                if(newPages.data.message.name == "has already been taken") {
                  res.flash("error", "Der Projektname '"+newInformation.getName()+"' ist bereits vergeben, bitte wählen Sie einen anderen Namen.")
                } else {
                  res.flash("error", "Ein Fehler ist aufgetreten. Bitte versuchen Sie es erneut. ")
                }
                res.redirect('/account/newInformation')
              } else {
                res.flash("success", "Ihre Webseite wurde erstellt, aber noch nicht veröffentlicht. Um Ihre Webseite endgültig zu veröffentlichen, "+
                  "schließen Sie die Einrichtung gemäß unten stehender Anleitung ab.")
                res.redirect('/account/updateInformation?id='+newPages.id)
              }
            }
          ], function (err) {
            if(err) console.log(err)
            // remove logo
            if (req.files) {
              fs.unlink(newLogoFile, (err) => {
                if(err) console.log(err)
              })
            }
          })
        }
      }
    }
  })

  app.get('/updateInformation', async function(req:any, res:any){
    if( !req.isAuthenticated() ) {
      res.redirect('/login')
    } else {
      let loggedInUser = await getLoggedInUserData(req.user.email)

      if (!loggedInUser) {
        res.redirect('/login')
      } else {
        if(!req.query.id) {
          res.redirect('/account/services')
        } else {
          let project = await gitlab.getProjectById(req.query.id)
          if (!project) {
            console.log(" ========= Error or no project found")
            res.redirect('/account/services')
          } else if (!project.owner) {
            console.log(" ========= Project cannot be accessed, since it does not have an owner")
            res.redirect('/account/services')
          } else if (project.owner.id != loggedInUser.getGitlabUserId()) {
            console.log(" ========= Access denied: Not your project")
            res.redirect('/account/services')
          } else {
            let curInformation = new projectInformation(loggedInUser.getGitlabUserId()!, project.name, project.description,
              req.query.id, project.avatar_url, project.path_with_namespace)
            
            res.render(lang+'/account/updateInformation', {
              user: loggedInUser,
              information: curInformation
            })
          }
        }
      }
    }
  })
  // update a website
  app.post('/updateInformation', async function(req:any, res:any){
    if( !req.isAuthenticated() ) {
      res.redirect('/login')
    } else {
      let loggedInUser = await getLoggedInUserData(req.user.email)

      if (!loggedInUser) {
        res.redirect('/login')
      } else {
        if (!req.body.name && !req.body.description) {
          res.flash('error', 'Bitte geben Sie die benötigten Daten ein')
          res.redirect('/account/updateInformation')
        } else {
          let projectName = req.body.name.toLowerCase().replace(/\s/g, '-')
          let projectDesc = req.body.description
          let updatedInformation = new projectInformation(loggedInUser.getGitlabUserId()!, projectName, projectDesc, req.query.id)
          let newLogoFile:any
  
          async.waterfall([
            function(callback:any){ // upload logo
              if(!req.files) {
                callback(null, newLogoFile)
              } else {
                newLogoFile = req.files.logo
                newLogoFile.mv(logoDir + newLogoFile.name, function(err:any) {
                  newLogoFile = logoDir + newLogoFile.name
                  callback(err, newLogoFile)
                })
              }
            },
            async function(newLogoFile:any){ // update gitlab page
              let updatedPages = await gitlab.updateProject(updatedInformation, newLogoFile)
              
              if (updatedPages.status) {
                if(updatedPages.data.message.name == "has already been taken") {
                  res.flash("error", "Der Projektname '"+projectName+"' ist bereits vergeben, bitte wählen Sie einen anderen Namen.")
                } else {
                  res.flash("error", "Ein Fehler ist aufgetreten. Bitte versuchen Sie es erneut. ")
                }
              } else {
                updatedInformation.setLogo(updatedPages.avatar_url)
                updatedInformation.setPath(updatedPages.path)
                res.flash("success", "Ihre Website wurde aktualisiert")
              }

              res.redirect('/account/updateInformation?id='+updatedInformation.getId())
            }
          ], function (err) {
            if(err) console.log(err)
            if(newLogoFile){ // remove logo
              fs.unlink(newLogoFile, (err) => {
                if(err) console.log(err)
              })
            }
          })
        }
      }
    }
  })

  app.delete('/deleteProject', async function(req:any, res:any){
    if( !req.isAuthenticated() ) {
      res.redirect('/login')
    } else {
      let loggedInUser = await getLoggedInUserData(req.user.email)
      if (!loggedInUser) {
        res.redirect('/login')
      } else {
        let projectId = req.body.id

        if (projectId) {
          // check if the owner is valid
          let project = await gitlab.getProjectById(projectId)
          if (!project) {
            console.log(" ========= Error or no project found")
          } else if (!project.owner) {
            console.log(" ========= Project cannot be accessed, since it does not have an owner")
          } else if (project.owner.id != loggedInUser.getGitlabUserId()) {
            console.log(" ========= Access denied: Not your project")
          } else {
            let isDeleted = await gitlab.deleteProjectById(projectId)
            if (!isDeleted) {
              res.flash("error", "Project cannot be deleted. Please try again.")
            }
          }
        }
        res.redirect('/account/services')
      }
    }
  })

}