# -*- coding: utf-8 -*-

from django.db.models import Q
from paramiko import SSHException
from jperm.perm_api import *
from juser.user_api import gen_ssh_key


from juser.models      import User, UserGroup
from jasset.models     import Asset, AssetGroup
from jperm.models      import PermRole, PermRule
from jumpserver.models import Setting

from jperm.utils       import updates_dict, gen_keys, get_rand_pass
from jperm.ansible_api import Tasks
from jperm.perm_api    import get_role_info

from jumpserver.api    import my_render, get_object, CRYPTOR


@require_role('admin')
def perm_rule_list(request):
    """
    list rule page
    """
    # 渲染数据
    header_title, path1, path2 = "授权规则", "规则管理", "查看规则"

    # 获取所有规则
    rules_list = PermRule.objects.all()

    # TODO: 搜索和分页
    keyword = request.GET.get('search', '')
    if keyword:
        rules_list = rules_list.filter(Q(name=keyword))

    rules_list, p, rules, page_range, current_page, show_first, show_end = pages(rules_list, request)
        
    return my_render('jperm/perm_rule_list.html', locals(), request)


@require_role('admin')
def perm_rule_detail(request):
    """
    rule detail page
    """
    # 渲染数据
    header_title, path1, path2 = "授权规则", "规则管理", "规则详情"

    # 根据rule_id 取得rule对象
    rule_id = request.GET.get("id")
    rule_obj = PermRule.objects.get(id=rule_id)
    user_obj = rule_obj.user.all()
    asset_obj = rule_obj.asset.all()
    roles_name = [role.name for role in rule_obj.role.all()]

    # 渲染数据
    roles_name = ','.join(roles_name)
    rule = rule_obj
    users = user_obj
    assets = asset_obj

    return my_render('jperm/perm_rule_detail.html', locals(), request)


def perm_rule_add(request):
    """
    add rule page
    """
    # 渲染数据
    header_title, path1, path2 = "授权规则", "规则管理", "添加规则"

    if request.method == 'GET':
        # 渲染数据, 获取所有 用户,用户组,资产,资产组,用户角色, 用于添加授权规则
        users = User.objects.all()
        user_groups = UserGroup.objects.all()
        assets = Asset.objects.all()
        asset_groups = AssetGroup.objects.all()
        roles = PermRole.objects.all()

        return my_render('jperm/perm_rule_add.html', locals(), request)

    elif request.method == 'POST':
        # 获取用户选择的 用户,用户组,资产,资产组,用户角色
        users_select = request.POST.getlist('user', [])
        user_groups_select = request.POST.getlist('usergroup', [])
        assets_select = request.POST.getlist('asset', [])
        asset_groups_select = request.POST.getlist('assetgroup', [])
        roles_select = request.POST.getlist('role', [])
        rule_name = request.POST.get('rulename')
        rule_comment = request.POST.get('rule_comment')
        rule_ssh_key = request.POST.get("use_publicKey")

        # 获取需要授权的主机列表
        assets_obj = [Asset.objects.get(ip=asset) for asset in assets_select]
        asset_groups_obj = [AssetGroup.objects.get(name=group) for group in asset_groups_select]
        group_assets_obj = [asset for asset in [group.asset_set.all() for group in asset_groups_obj]]
        calc_assets = set(group_assets_obj) | set(assets_obj)

        # 获取需要授权的用户列表
        users_obj = [User.objects.get(name=user) for user in users_select]
        user_groups_obj = [UserGroup.objects.get(name=group) for group in user_groups_select]
        group_users_obj = [user for user in [group.user_set.all() for group in user_groups_obj]]
        calc_users = set(group_users_obj) | set(users_obj)

        # 获取授予的角色列表
        roles_obj = [PermRole.objects.get(name=role) for role in roles_select]

        # 仅授权成功的，写回数据库(授权规则,用户,用户组,资产,资产组,用户角色)
        rule = PermRule(name=rule_name, comment=rule_comment)
        rule.save()
        rule.user = users_obj
        rule.usergroup = user_groups_obj
        rule.asset = assets_obj
        rule.asset_group = asset_groups_obj
        rule.role = roles_obj
        rule.save()

        msg = u"添加授权规则：%s" % rule.name
        # 渲染数据
        header_title, path1, path2 = "授权规则", "规则管理", "查看规则"
        rules_list = PermRule.objects.all()

        # TODO: 搜索和分页
        keyword = request.GET.get('search', '')
        if keyword:
            rules_list = rules_list.filter(Q(name=keyword))
        rules_list, p, rules, page_range, current_page, show_first, show_end = pages(rules_list, request)

        return my_render('jperm/perm_rule_list.html', locals(), request)


@require_role('admin')
def perm_rule_edit(request):
    """
    edit rule page
    """
    # 渲染数据
    header_title, path1, path2 = "授权规则", "规则管理", "添加规则"

    # 根据rule_id 取得rule对象
    rule_id = request.GET.get("id")
    rule = PermRule.objects.get(id=rule_id)

    if request.method == 'GET' and rule_id:
        # 渲染数据, 获取所选的rule对象
        rule_comment = rule.comment
        users_select = rule.user.all()
        user_groups_select = rule.user_group.all()
        assets_select = rule.asset.all()
        asset_groups_select = rule.asset_group.all()
        roles_select = rule.role.all()

        users = User.objects.all()
        user_groups = UserGroup.objects.all()
        assets = Asset.objects.all()
        asset_groups = AssetGroup.objects.all()
        roles = PermRole.objects.all()

        return my_render('jperm/perm_rule_edit.html', locals(), request)

    elif request.method == 'POST' and rule_id:
        # 获取用户选择的 用户,用户组,资产,资产组,用户角色
        rule_name = request.POST.get('rule_name')
        rule_comment = request.POST.get("rule_comment")
        users_select = request.POST.getlist('user', [])
        user_groups_select = request.POST.getlist('usergroup', [])
        assets_select = request.POST.getlist('asset', [])
        asset_groups_select = request.POST.getlist('assetgroup', [])
        roles_select = request.POST.getlist('role', [])

        # 获取需要授权的主机列表
        assets_obj = [Asset.objects.get(ip=asset) for asset in assets_select]
        asset_groups_obj = [AssetGroup.objects.get(name=group) for group in asset_groups_select]
        group_assets_obj = [asset for asset in [group.asset_set.all() for group in asset_groups_obj]]
        calc_assets = set(group_assets_obj) | set(assets_obj)

        # 获取需要授权的用户列表
        users_obj = [User.objects.get(name=user) for user in users_select]
        user_groups_obj = [UserGroup.objects.get(name=group) for group in user_groups_select]
        group_users_obj = [user for user in [group.user_set.all() for group in user_groups_obj]]
        calc_users = set(group_users_obj) | set(users_obj)

        # 获取授予的角色列表
        roles_obj = [PermRole.objects.get(name=role) for role in roles_select]

        # 仅授权成功的，写回数据库(授权规则,用户,用户组,资产,资产组,用户角色)
        rule.user = users_obj
        rule.usergroup = user_groups_obj
        rule.asset = assets_obj
        rule.asset_group = asset_groups_obj
        rule.role = roles_obj
        rule.name = rule_name
        rule.comment = rule.comment
        rule.save()

        msg = u"更新授权规则：%s" % rule.name
        # 渲染数据
        header_title, path1, path2 = "授权规则", "规则管理", "查看规则"
        rules_list = PermRule.objects.all()

        # TODO: 搜索和分页
        keyword = request.GET.get('search', '')
        if keyword:
            rules_list = rules_list.filter(Q(name=keyword))
        rules_list, p, rules, page_range, current_page, show_first, show_end = pages(rules_list, request)

        return my_render('jperm/perm_rule_list.html', locals(), request)


@require_role('admin')
def perm_rule_delete(request):
    """
    use to delete rule
    :param request:
    :return:
    """
    if request.method == 'POST':
        # 根据rule_id 取得rule对象
        rule_id = request.POST.get("id")
        rule_obj = PermRule.objects.get(id=rule_id)
        print rule_id, rule_obj
        print rule_obj.name
        rule_obj.delete()
        return HttpResponse(u"删除授权规则：%s" % rule_obj.name)
    else:
        return HttpResponse(u"不支持该操作")


@require_role('admin')
def perm_role_list(request):
    """
    list role page
    """
    # 渲染数据
    header_title, path1, path2 = "系统角色", "角色管理", "查看角色"

    # 获取所有系统角色
    roles_list = PermRole.objects.all()

    # TODO: 搜索和分页
    keyword = request.GET.get('search', '')
    if keyword:
        roles_list = roles_list.filter(Q(name=keyword))

    roles_list, p, roles, page_range, current_page, show_first, show_end = pages(roles_list, request)

    return my_render('jperm/perm_role_list.html', locals(), request)


@require_role('admin')
def perm_role_add(request):
    """
    add role page
    """
    # 渲染数据
    header_title, path1, path2 = "系统角色", "角色管理", "添加角色"

    if request.method == "POST":
        # 获取参数： name, comment
        name = request.POST.get("role_name", "")
        comment = request.POST.get("role_comment", "")
        password = request.POST.get("role_password", "")
        key_content = request.POST.get("role_key", "")
        try:
            if get_object(PermRole, name=name):
                raise ServerError('已经存在该用户 %s' % name)

            if '' == password and '' == key_content:
                raise ServerError('账号和密码必填一项')
            if password:
                encrypt_pass = CRYPTOR.encrypt(password)
            else:
                encrypt_pass = CRYPTOR.encrypt(CRYPTOR.gen_rand_pass(20))
            # 生成随机密码，生成秘钥对
            if key_content:
                try:
                    key_path = gen_keys(key=key_content)
                except SSHException:
                    raise ServerError('输入的密钥不合法')
            else:
                key_path = gen_keys()
            logger.debug('generate role key: %s' % key_path)
            role = PermRole(name=name, comment=comment, password=encrypt_pass, key_path=key_path)
            role.save()
            msg = u"添加角色: %s" % name
            return HttpResponseRedirect('/jperm/role/')
        except ServerError, e:
            error = e

    return my_render('jperm/perm_role_add.html', locals(), request)


@require_role('admin')
def perm_role_delete(request):
    """
    delete role page
    """
    if request.method == "POST":
        # 获取参数删除的role对象
        role_id = request.POST.get("id")
        role = PermRole.objects.get(id=role_id)
        role_key = role.key_path
        # 删除存储的秘钥，以及目录
        key_files = os.listdir(role_key)
        for key_file in key_files:
            os.remove(os.path.join(role_key, key_file))
        os.rmdir(role_key)
        # 数据库里删除记录
        role.delete()
        return HttpResponse(u"删除角色: %s" % role.name)
    else:
        return HttpResponse(u"不支持该操作")


@require_role('admin')
def perm_role_detail(request):
    """
    the role detail page
        the role_info data like:
            {'asset_groups': [],
            'assets': [<Asset: 192.168.10.148>],
            'rules': [<PermRule: PermRule object>],
            '': [],
            '': [<User: user1>]}
    """
    # 渲染数据
    header_title, path1, path2 = "系统角色", "角色管理", "角色详情"

    if request.method == "GET":
        role_id = request.GET.get("id")
        role_info = get_role_info(role_id)

        # 渲染数据
        rules = role_info.get("rules")
        assets = role_info.get("assets")
        asset_groups = role_info.get("asset_groups")
        users = role_info.get("users")
        user_groups = role_info.get("user_groups")

        return my_render('jperm/perm_role_detail.html', locals(), request)


@require_role('admin')
def perm_role_edit(request):
    """
    edit role page
    """
    # 渲染数据
    header_title, path1, path2 = "系统角色", "角色管理", "角色编辑"

    # 渲染数据
    role_id = request.GET.get("id")
    role = get_object(PermRole, id=role_id)

    if request.method == "POST":
        # 获取 POST 数据
        role_name = request.POST.get("role_name")
        role_password = request.POST.get("role_password")
        role_comment = request.POST.get("role_comment")
        key_content = request.POST.get("role_key", "")
        try:
            if not role:
                raise ServerError('角色用户不能存在')

            if role_password:
                encrypt_pass = CRYPTOR.encrypt(role_password)
                role.password = encrypt_pass
            # 生成随机密码，生成秘钥对
            if key_content:
                try:
                    key_path = gen_keys(key=key_content, key_path_dir=role.key_path)
                except SSHException:
                    raise ServerError('输入的密钥不合法')
                logger.debug('Recreate role key: %s' % role.key_path)
            # 写入数据库
            role.name = role_name
            role.comment = role_comment

            role.save()
            msg = u"更新系统角色： %s" % role.name
            return HttpResponseRedirect('/jperm/role/')
        except ServerError, e:
            error = e

    return my_render('jperm/perm_role_edit.html', locals(), request)


@require_role('admin')
def perm_role_push(request):
    """
    the role push page
    """
    # 渲染数据
    header_title, path1, path2 = "系统角色", "角色管理", "角色推送"

    if request.method == "GET":
        # 渲染数据
        roles = PermRole.objects.all()
        assets = Asset.objects.all()
        asset_groups = AssetGroup.objects.all()

        return my_render('jperm/perm_role_push.html', locals(), request)

    if request.method == "POST":
        # 获取推荐角色的名称列表
        role_names = request.POST.getlist("roles")

        # 计算出需要推送的资产列表
        asset_ips = request.POST.getlist("assets")
        asset_group_names = request.POST.getlist("asset_groups")
        assets_obj = [Asset.objects.get(ip=asset_ip) for asset_ip in asset_ips]
        asset_groups_obj = [AssetGroup.objects.get(name=asset_group_name) for asset_group_name in asset_group_names]
        group_assets_obj = []
        for asset_group in asset_groups_obj:
            group_assets_obj.extend(asset_group.asset_set.all())
        calc_assets = set(assets_obj) | set(group_assets_obj)

        # 生成Inventory
        push_resource = []
        for asset in calc_assets:
            if asset.use_default_auth:
                username = Setting.field1
                port = Setting.field2
                password = Setting.field3
            else:
                username = asset.username
                password = asset.password
                port = asset.port
            push_resource.append({"hostname": asset.ip,
                                  "port": port,
                                  "username": username,
                                  "password": password})

        # 获取角色的推送方式,以及推送需要的信息
        roles_obj = [PermRole.objects.get(name=role_name) for role_name in role_names]
        role_pass = {}
        role_key = {}
        for role in roles_obj:
            role_pass[role.name] = role.password
            role_key[role.name] = os.path.join(role.key_path, 'id_rsa.pub')

        # 调用Ansible API 进行推送
        password_push = request.POST.get("use_password")
        key_push = request.POST.get("use_publicKey")
        task = Tasks(push_resource)
        ret = {}
        ret_failed = []

        # 因为要先建立用户，所以password 是必选项，
        # 而push key是在 password也完成的情况下的 可选项
        ret["password_push"] = task.add_multi_user(**role_pass)
        if ret["password_push"].get("status") != "success":
            ret_failed.append(1)

        if key_push:
            ret["key_push"] = task.push_multi_key(**role_key)
            if ret["key_push"].get("status") != "success":
                ret_failed.append(1)

        print ret
        if ret_failed:
            return HttpResponse(u"推送失败")
        else:
            return HttpResponse(u"推送系统角色： %s" % ','.join(role_names))

