use 5.010001;

package Gitprep;

use Mojo::Base 'Mojolicious';

use Carp 'croak';

use DBIx::Custom;

use Gitprep::API;

use Gitprep::Git;

use Gitprep::Manager;

use Scalar::Util 'weaken';

use Validator::Custom;

use Time::Moment;

# Digest::SHA loading to Mojo::Util if not loaded

{

  package Mojo::Util;

  eval {require Digest::SHA; import Digest::SHA qw(sha1 sha1_hex)};

}

our $VERSION = 'v2.00_dev';

has 'dbi';

has 'git';

has 'manager';

has 'vc';

use constant BUFFER_SIZE => 8192;

sub data_dir {

  my $self = shift;

  my $data_dir = $self->config('data_dir');

  return $data_dir;

}

sub rep_home {

  my $self = shift;

  my $rep_home = $self->data_dir . "/rep";

  return $rep_home;

}

sub rep_info {

  my ($self, $user, $project) = @_;

  my $info = {};

  $info->{user} = $user;

  $info->{project} = $project;

  $info->{git_dir} = $self->rep_home . "/$user/$project.git";

  return $info;

}

sub work_rep_home {

  my $self = shift;

  my $work_rep_home = $self->data_dir . "/work";

  return $work_rep_home;

}

sub work_rep_info {

  my ($self, $user, $project) = @_;

  my $info = {};

  $info->{user} = $user;

  $info->{project} = $project;

  $info->{git_dir} = $self->work_rep_home . "/$user/$project/.git";

  $info->{work_tree} = $self->work_rep_home . "/$user/$project";

  return $info;

}

sub startup {

  my $self = shift;

  # Config file

  $self->plugin('INIConfig', {ext => 'conf'});

  # Config file for developper

  unless ($ENV{GITPREP_NO_MYCONFIG}) {

    my $my_conf_file = $self->home->rel_file('gitprep.my.conf');

    $self->plugin('INIConfig', {file => $my_conf_file}) if -f $my_conf_file;

  }

  # Listen

  my $conf = $self->config;

  my $listen = $conf->{hypnotoad}{listen} ||= ['http://*:10020'];

  $listen = [split /,/, $listen] unless ref $listen eq 'ARRAY';

  $conf->{hypnotoad}{listen} = $listen;

  # Data directory

  my $data_dir = $ENV{GITPREP_DATA_DIR} ? $ENV{GITPREP_DATA_DIR} : $self->home->rel_file('data');

  $self->config(data_dir => $data_dir);

  # Git

  my $git = Gitprep::Git->new;

  $git->app($self);

  weaken $git->{app};

  my $git_bin

    = $conf->{basic}{git_bin} ? $conf->{basic}{git_bin} : $git->search_bin;

  if (!$git_bin || ! -e $git_bin) {

    $git_bin ||= '';

    my $error = "Can't detect or found git command ($git_bin)."

      . " set git_bin in gitprep.conf";

    $self->log->error($error);

    croak $error;

  }

  $git->bin($git_bin);

  # Repository Manager

  my $manager = Gitprep::Manager->new;

  $manager->app($self);

  weaken $manager->{app};

  $self->manager($manager);

  # authorized_keys file

  my $authorized_keys_file = $conf->{basic}{authorized_keys_file};

  unless (defined $authorized_keys_file) {

    if (defined $ENV{HOME}) {

      $authorized_keys_file = "$ENV{HOME}/.ssh/authorized_keys";

    }

  }

  if (defined $authorized_keys_file) {

    $self->manager->authorized_keys_file($authorized_keys_file);

  }

  else {

    $self->app->log->warn(qq/Config "authorized_keys_file" can't be detected/);

  }

  # Repository home

  my $rep_home = "$data_dir/rep";

  unless (-d $rep_home) {

    mkdir $rep_home

      or croak "Can't create directory $rep_home: $!";

  }

  # Time Zone

  if (my $time_zone = $conf->{basic}{time_zone}) {

    if ($time_zone =~ /^([\+-])?([0-9]?[0-9]):([0-9][0-9])$/) {

      my $sign = $1 || '';

      my $hour = $2;

      my $min = $3;

      my $time_zone_second = $sign . ($hour * 60 * 60) + ($min * 60);

      $git->time_zone_second($time_zone_second);

    }

    else {

      $self->log->warn("Bad time zone $time_zone. Time zone become GMT");

    }

  }

  $self->git($git);

  # DBI

  my $db_file = "$data_dir/gitprep.db";

  my $dbi = DBIx::Custom->connect(

    dsn => "dbi:SQLite:database=$db_file",

    connector => 1,

    option => {sqlite_unicode => 1, sqlite_use_immediate_transaction => 1}

  );

  $self->dbi($dbi);

  # Database file permision

  if (my $user = $self->config->{hypnotoad}{user}) {

    my $uid = (getpwnam $user)[2];

    chown $uid, -1, $db_file;

  }

  if (my $group = $self->config->{hypnotoad}{group}) {

    my $gid = (getgrnam $group)[2];

    chown -1, $gid, $db_file;

  }

  # Model

  my $models = [

    {

      table => 'user',

      primary_key => 'row_id'

    },

    {

      table => 'ssh_public_key',

      primary_key => 'row_id',

      join => [

        'left join user on ssh_public_key.user = user.row_id'

      ]

    },

    {

      table => 'project',

      primary_key => 'row_id',

      join => [

        'left join user on project.user = user.row_id'

      ]

    },

    {

      table => 'collaboration',

      primary_key => 'row_id',

      join => [

        'left join user on collaboration.user = user.row_id',

        'left join project on collaboration.project = project.row_id',

      ]

    },

    {

      table => 'pull_request',

      primary_key => 'row_id',

      join => [

        'left join user on pull_request.open_user = user.row_id'

      ]

    }

  ];

  $dbi->create_model($_) for @$models;

  $dbi->setup_model;

  # Validator

  my $vc = Validator::Custom->new;

  $self->vc($vc);

  $vc->register_constraint(

    user_name => sub {

      my $value = shift;

      return ($value || '') =~ /^[a-zA-Z0-9_\-]+$/;

    },

    project_name => sub {

      my $value = shift;

      return 0 unless defined $value;

      return 0 if $value eq '.' || $value eq '..';

      return ($value || '') =~ /[a-zA-Z0-9_\-\.]+$/;

    }

  );

  $vc->add_check(project_name => sub {

    my ($vc, $value) = @_;

    return 0 unless defined $value;

    return 0 if $value eq '.' || $value eq '..';

    return ($value || '') =~ /[a-zA-Z0-9_\-\.]+$/;

  });

  $vc->add_check(user_name => sub {

    my ($vc, $value) = @_;

    return ($value || '') =~ /^[a-zA-Z0-9_\-]+$/;

  });

  # Basic auth plugin

  $self->plugin('BasicAuth');

  {

    my $r = $self->routes;

    # DBViewer(only development)

    # /dbviewer

    if ($self->mode eq 'development') {

      eval {

        $self->plugin(

          'DBViewer',

          dsn => "dbi:SQLite:database=$db_file"

        );

      };

    }

    # Auto route

    {

      my $r = $r->under(sub {

        my $self = shift;

        my $api = $self->gitprep_api;

        # Authentication

        {

          my $path = $self->req->url->path->parts->[0] || '';

          # Admin

          if ($path eq '_admin' && !$api->logined_admin) {

            $self->redirect_to('/');

            return;

          }

        }

        return 1; 

      });

      # Auto routes

      $self->plugin('AutoRoute', route => $r);

      # Custom routes

      {

        # Show ssh keys

        $r->get('/(:user).keys' => sub { shift->render_maybe('/user-keys') });

        # User

        my $r = $r->route('/:user');

        {

          # Home

          $r->get('/' => [format => 0] => sub { shift->render_maybe('/user') });

          # Settings

          $r->get('/_settings' => sub { shift->render_maybe('/user-settings') });

          # SSH keys

          $r->any('/_settings/ssh' => sub { shift->render_maybe('/user-settings/ssh') });

        }

        # Smart HTTP

        {

          my $r = $r->route('/(#project).git');

          {

            my $r = $r->under(sub {

              my $self = shift;

              my $api = $self->gitprep_api;

              my $user = $self->param('user');

              my $project = $self->param('project');

              my $private = $self->app->manager->is_private_project($user, $project);

              # Basic auth when push request

              my $service = $self->param('service') || '';

              if ($service eq 'git-receive-pack' || $private) {

                $self->basic_auth("Git Area", sub {

                  my ($auth_user, $auth_password) = @_;

                  if (!defined $auth_user || !length $auth_user) {

                    $self->app->log->warn("Authentication: User name is empty");

                  }

                  $auth_user = '' unless defined $auth_user;

                  $auth_password = '' unless defined $auth_password;

                  my $is_valid =

                    ($user eq $auth_user || $api->is_collaborator($user, $project, $auth_user))

                    && $api->check_user_and_password($auth_user, $auth_password);

                  return $is_valid;

                });

              }

              else {

                return 1;

              }

            });

            # /

            $r->get('/')->to(cb => sub {

              my $self = shift;

              my $user = $self->param('user');

              my $project = $self->param('project');

              $self->redirect_to("/$user/$project");

            });

            # /info/refs

            $r->get('/info/refs' => sub { shift->render_maybe('smart-http/info-refs') });

            # /git-upload-pack or /git-receive-pack

            $r->any('/git-(:service)'

              => [service => qr/(?:upload-pack|receive-pack)/]

              => sub { shift->render_maybe('smart-http/service') }

            );

            # Static file

            $r->get('/(*Path)' => sub { shift->render_maybe('smart-http/static') });

          }

        }

        # Project

        {

          my $r = $r->route('/#project');

          {

            my $r = $r->under(sub {

              my $self = shift;

              # API

              my $api = $self->gitprep_api;

              # Private

              my $user = $self->param('user');

              my $project = $self->param('project');

              my $private = $self->app->manager->is_private_project($user, $project);

              if ($private) {

                if ($api->can_access_private_project($user, $project)) {

                  return 1;

                }

                else {

                  $self->render('private');

                  return 0;

                }

              }

              else {

                return 1;

              }

            });

            # Home

            $r->get('/' => sub { shift->render_maybe('/tree') });

            # Pull requests

            $r->get('/pulls' => sub { shift->render_maybe('/pulls') })->to(tab => 'pulls');

            # Pull request

            $r->any('/pull/:row_id' => sub { shift->render_maybe('/pull') })->to(tab => 'pulls');

            # Commit

            $r->get('/commit/*diff' => sub { shift->render_maybe('/commit') });

            # Commits

            $r->get('/commits/*rev_file' => sub { shift->render_maybe('/commits') });

            # Branches

            $r->any('/branches/:display' => {display => undef} => sub { shift->render_maybe('/branches') });

            # Tags

            $r->get('/tags' => sub { shift->render_maybe('/tags') });

            # Tree

            $r->get('/tree/*rev_dir' => sub { shift->render_maybe('/tree') });

            # Blob

            $r->get('/blob/*rev_file' => sub { shift->render_maybe('/blob') });

            # Sub module

            $r->get('/submodule/*rev_file' => sub { shift->render_maybe('/submodule') });

            # Raw

            $r->get('/raw/*rev_file' => sub { shift->render_maybe('/raw') });

            # Blame

            $r->get('/blame/*rev_file' => sub { shift->render_maybe('/blame') });

            # Archive

            # Archive

            $r->get('/archive/(*rev).tar.gz' => sub { shift->render_maybe('/archive') })->to(archive_type => 'tar');

            $r->get('/archive/(*rev).zip' => sub { shift->render_maybe('/archive') })->to(archive_type => 'zip' );

            # Compare

            $r->any('/compare' => sub { shift->render_maybe('/compare') });

            $r->any(

              '/compare/(:rev1)...(:rev2)'

              => [rev1 => qr/[^\.]+/, rev2 => qr/[^\.]+/]

              => sub { shift->render_maybe('/compare') }

            );

            $r->any('/compare/(:rev2)' => sub { shift->render_maybe('/compare') });

            # Settings

            {

              my $r = $r->route('/settings')->to(tab => 'settings');

              # Settings

              $r->any('/' => sub { shift->render_maybe('/settings') });

              # Collaboration

              $r->any('/collaboration' => sub { shift->render_maybe('/settings/collaboration') });

            }

            # Fork

            $r->any('/fork' => sub { shift->render_maybe('/fork') });

            # Network

            {

              my $r = $r->route('/network')->to(tab => 'graph');

              # Network

              $r->get('/' => sub { shift->render_maybe('/network') });

              # Network Graph

              $r->get('/graph/(*rev1)...(*rev2_abs)' => sub { shift->render_maybe('/network/graph') });

            }

            # Import branch

            $r->any('/import-branch/:remote_user/:remote_project' => sub { shift->render_maybe('/import-branch') });

            # Get branches and tags

            $r->get('/api/revs' => sub { shift->render_maybe('/api/revs') });

          }

        }

      }

    }

  }

  # Helper

  {

    # API

    $self->helper(gitprep_api => sub { Gitprep::API->new(shift) });

  }

  # set scheme to https when X-Forwarded-HTTPS header is specified

  # This is for the backword compatible only. Now X-Forwarded-Proto is used for this purpose

  $self->hook(before_dispatch => sub {

    my $c = shift;

    if ($c->req->headers->header('X-Forwarded-HTTPS')) {

      $c->req->url->base->scheme('https');

      $c->app->log->warn("X-Forwarded-HTTPS header is DEPRECATED! use X-Forwarded-Proto instead.");

    }

  });

  # Reverse proxy support

  my $reverse_proxy_on = $self->config->{reverse_proxy}{on};

  my $path_depth = $self->config->{reverse_proxy}{path_depth};

  if ($reverse_proxy_on) {

    $ENV{MOJO_REVERSE_PROXY} = 1;

    if ($path_depth) {

      $self->hook('before_dispatch' => sub {

        my $self = shift;

        for (1 .. $path_depth) {

          my $prefix = shift @{$self->req->url->path->parts};

          push @{$self->req->url->base->path->parts}, $prefix;

        }

      });

    }

  }

  # Smart HTTP Buffer size

  $ENV{GITPREP_SMART_HTTP_BUFFER_SIZE} ||= 16384;

}

1;