#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
use t::APISIX 'no_plan';

log_level('debug');
repeat_each(1);
no_long_string();
no_root_location();
# no_shuffle();

add_block_preprocessor(sub {
    my ($block) = @_;

    if ((!defined $block->error_log) && (!defined $block->no_error_log)) {
        $block->set_value("no_error_log", "[error]");
    }

    if (!defined $block->request) {
        $block->set_value("request", "GET /t");
    }
});

run_tests();

__DATA__

=== TEST 1: Set up new route with wrong valid_issuers
--- config
    location /t {
        content_by_lua_block {
            local t = require("lib.test_admin").test
            local code, body = t('/apisix/admin/routes/1',
                 ngx.HTTP_PUT,
                 [[{
                        "plugins": {
                            "openid-connect": {
                                "client_id": "dummy",
                                "client_secret": "dummy",
                                "discovery": "http://127.0.0.1:8080/realms/University/.well-known/openid-configuration",
                                "ssl_verify": true,
                                "timeout": 10,
                                "bearer_only": true,
                                "use_jwks": true,
                                "claim_validator": {
                                    "issuer": {
                                        "valid_issuers": 123
                                    }
                                }
                            }
                        },
                        "upstream": {
                            "nodes": {
                                "127.0.0.1:1980": 1
                            },
                            "type": "roundrobin"
                        },
                        "uri": "/*"
                }]]
                )

            if code >= 300 then
                ngx.status = code
            end
            ngx.say(body)
        }
    }
--- error_code: 400
--- response_body eval
qr/\{"error_msg":"failed to check the configuration of plugin openid-connect err: property \\"claim_validator\\" validation failed.*"\}/



=== TEST 2: Set up new route with valid valid_issuers
--- config
    location /t {
        content_by_lua_block {
            local t = require("lib.test_admin").test
            local code, body = t('/apisix/admin/routes/1',
                 ngx.HTTP_PUT,
                 [[{
                        "plugins": {
                            "openid-connect": {
                                "client_id": "dummy",
                                "client_secret": "dummy",
                                "discovery": "http://127.0.0.1:8080/realms/University/.well-known/openid-configuration",
                                "ssl_verify": true,
                                "timeout": 10,
                                "bearer_only": true,
                                "use_jwks": true,
                                "claim_validator": {
                                    "issuer": {
                                        "valid_issuers": ["https://securetoken.google.com/test-firebase-project"]
                                    }
                                }
                            }
                        },
                        "upstream": {
                            "nodes": {
                                "127.0.0.1:1980": 1
                            },
                            "type": "roundrobin"
                        },
                        "uri": "/*"
                }]]
                )

            if code >= 300 then
                ngx.status = code
            end
            ngx.say(body)
        }
    }
--- response_body
passed



=== TEST 3: Update plugin with ID provider jwks endpoint for token verification with invalid issuer.
--- config
    location /t {
        content_by_lua_block {
            local t = require("lib.test_admin").test
            local code, body = t('/apisix/admin/routes/1',
                 ngx.HTTP_PUT,
                 [[{
                        "plugins": {
                            "openid-connect": {
                                "client_id": "not required",
                                "client_secret": "not required",
                                "discovery": "http://127.0.0.1:8080/realms/University/.well-known/openid-configuration",
                                "redirect_uri": "http://localhost:3000",
                                "ssl_verify": false,
                                "timeout": 10,
                                "bearer_only": true,
                                "use_jwks": true,
                                "realm": "University",
                                "claim_validator": {
                                    "issuer": {
                                        "valid_issuers": ["https://securetoken.google.com/test-firebase-project"]
                                    }
                                }
                            }
                        },
                        "upstream": {
                            "nodes": {
                                "127.0.0.1:1980": 1
                            },
                            "type": "roundrobin"
                        },
                        "uri": "/hello"
                }]]
                )

            if code >= 300 then
                ngx.status = code
            end
            ngx.say(body)
        }
    }
--- response_body
passed



=== TEST 4: verification fails because issuer not in valid_issuer
--- config
    location /t {
        content_by_lua_block {
            -- Obtain valid access token from Keycloak using known username and password.
            local json_decode = require("toolkit.json").decode
            local http = require "resty.http"
            local httpc = http.new()
            local uri = "http://127.0.0.1:8080/realms/University/protocol/openid-connect/token"
            local res, err = httpc:request_uri(uri, {
                    method = "POST",
                    body = "grant_type=password&client_id=course_management&client_secret=d1ec69e9-55d2-4109-a3ea-befa071579d5&username=teacher@gmail.com&password=123456",
                    headers = {
                        ["Content-Type"] = "application/x-www-form-urlencoded"
                    }
                })

            -- Check response from keycloak and fail quickly if there's no response.
            if not res then
                ngx.say(err)
                return
            end

            -- Check if response code was ok.
            if res.status == 200 then
                -- Get access token from JSON response body.
                local body = json_decode(res.body)
                local accessToken = body["access_token"]

                -- Access route using access token. Should work.
                uri = "http://127.0.0.1:" .. ngx.var.server_port .. "/hello"
                local res, err = httpc:request_uri(uri, {
                    method = "GET",
                    headers = {
                        ["Authorization"] = "Bearer " .. body["access_token"]
                    }
                 })

                if res.status == 200 then
                    -- Route accessed successfully.
                    ngx.say(true)
                else
                    -- Couldn't access route.
                    ngx.say(false)
                end
            else
                -- Response from Keycloak not ok.
                ngx.say(false)
            end
        }
    }
--- response_body
false
--- error_log
OIDC introspection failed: jwt signature verification failed: Claim 'iss' ('http://127.0.0.1:8080/realms/University') returned failure



=== TEST 5: Update plugin with ID provider jwks endpoint for token verification with valid issuer.
--- config
    location /t {
        content_by_lua_block {
            local t = require("lib.test_admin").test
            local code, body = t('/apisix/admin/routes/1',
                 ngx.HTTP_PUT,
                 [[{
                        "plugins": {
                            "openid-connect": {
                                "client_id": "dummy",
                                "client_secret": "dummy",
                                "discovery": "http://127.0.0.1:8080/realms/University/.well-known/openid-configuration",
                                "redirect_uri": "http://localhost:3000",
                                "ssl_verify": false,
                                "timeout": 10,
                                "bearer_only": true,
                                "use_jwks": true,
                                "realm": "University",
                                "claim_validator": {
                                    "issuer": {
                                         "valid_issuers": ["http://127.0.0.1:8080/realms/University"]
                                    }
                                }
                            }
                        },
                        "upstream": {
                            "nodes": {
                                "127.0.0.1:1980": 1
                            },
                            "type": "roundrobin"
                        },
                        "uri": "/hello"
                }]]
                )

            if code >= 300 then
                ngx.status = code
            end
            ngx.say(body)
        }
    }
--- response_body
passed



=== TEST 6: Obtain valid token and access route with it.
--- config
    location /t {
        content_by_lua_block {
            -- Obtain valid access token from Keycloak using known username and password.
            local json_decode = require("toolkit.json").decode
            local http = require "resty.http"
            local httpc = http.new()
            local uri = "http://127.0.0.1:8080/realms/University/protocol/openid-connect/token"
            local res, err = httpc:request_uri(uri, {
                    method = "POST",
                    body = "grant_type=password&client_id=course_management&client_secret=d1ec69e9-55d2-4109-a3ea-befa071579d5&username=teacher@gmail.com&password=123456",
                    headers = {
                        ["Content-Type"] = "application/x-www-form-urlencoded"
                    }
                })

            -- Check response from keycloak and fail quickly if there's no response.
            if not res then
                ngx.say(err)
                return
            end

            -- Check if response code was ok.
            if res.status == 200 then
                -- Get access token from JSON response body.
                local body = json_decode(res.body)
                local accessToken = body["access_token"]

                -- Access route using access token. Should work.
                uri = "http://127.0.0.1:" .. ngx.var.server_port .. "/hello"
                local res, err = httpc:request_uri(uri, {
                    method = "GET",
                    headers = {
                        ["Authorization"] = "Bearer " .. body["access_token"]
                    }
                 })

                if res.status == 200 then
                    -- Route accessed successfully.
                    ngx.say(true)
                else
                    -- Couldn't access route.
                    ngx.say(false)
                end
            else
                -- Response from Keycloak not ok.
                ngx.say(false)
            end
        }
    }
--- response_body
true
--- grep_error_log eval
qr/token validate successfully by \w+/
--- grep_error_log_out
token validate successfully by jwks



=== TEST 7: Update plugin with ID provider jwks endpoint for token verification with valid issuer in discovery endpoint.
--- config
    location /t {
        content_by_lua_block {
            local t = require("lib.test_admin").test
            local code, body = t('/apisix/admin/routes/1',
                 ngx.HTTP_PUT,
                 [[{
                        "plugins": {
                            "openid-connect": {
                                "client_id": "dummy",
                                "client_secret": "dummy",
                                "discovery": "http://127.0.0.1:8080/realms/University/.well-known/openid-configuration",
                                "redirect_uri": "http://localhost:3000",
                                "ssl_verify": false,
                                "timeout": 10,
                                "bearer_only": true,
                                "use_jwks": true,
                                "realm": "University"
                            }
                        },
                        "upstream": {
                            "nodes": {
                                "127.0.0.1:1980": 1
                            },
                            "type": "roundrobin"
                        },
                        "uri": "/hello"
                }]]
                )

            if code >= 300 then
                ngx.status = code
            end
            ngx.say(body)
        }
    }
--- response_body
passed



=== TEST 8: Obtain valid token and access route with it. Use valid_issuer from discovery endpoint.
--- config
    location /t {
        content_by_lua_block {
            -- Obtain valid access token from Keycloak using known username and password.
            local json_decode = require("toolkit.json").decode
            local http = require "resty.http"
            local httpc = http.new()
            local uri = "http://127.0.0.1:8080/realms/University/protocol/openid-connect/token"
            local res, err = httpc:request_uri(uri, {
                    method = "POST",
                    body = "grant_type=password&client_id=course_management&client_secret=d1ec69e9-55d2-4109-a3ea-befa071579d5&username=teacher@gmail.com&password=123456",
                    headers = {
                        ["Content-Type"] = "application/x-www-form-urlencoded"
                    }
                })

            -- Check response from keycloak and fail quickly if there's no response.
            if not res then
                ngx.say(err)
                return
            end

            -- Check if response code was ok.
            if res.status == 200 then
                -- Get access token from JSON response body.
                local body = json_decode(res.body)
                local accessToken = body["access_token"]

                -- Access route using access token. Should work.
                uri = "http://127.0.0.1:" .. ngx.var.server_port .. "/hello"
                local res, err = httpc:request_uri(uri, {
                    method = "GET",
                    headers = {
                        ["Authorization"] = "Bearer " .. body["access_token"]
                    }
                 })

                if res.status == 200 then
                    -- Route accessed successfully.
                    ngx.say(true)
                else
                    -- Couldn't access route.
                    ngx.say(false)
                end
            else
                -- Response from Keycloak not ok.
                ngx.say(false)
            end
        }
    }
--- response_body
true
--- grep_error_log eval
qr/token validate successfully by \w+/
--- grep_error_log_out
token validate successfully by jwks
--- error_log
valid_issuers not provided explicitly, using issuer from discovery doc: http://127.0.0.1:8080/realms/University