package agent

import (
	"bytes"
	"fmt"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
	"time"

	"github.com/hashicorp/consul/api"
	"github.com/hashicorp/consul/consul/structs"
	"github.com/hashicorp/consul/testutil"
)

func TestOperator_RaftConfiguration(t *testing.T) {
	httpTest(t, func(srv *HTTPServer) {
		body := bytes.NewBuffer(nil)
		req, err := http.NewRequest("GET", "/v1/operator/raft/configuration", body)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		resp := httptest.NewRecorder()
		obj, err := srv.OperatorRaftConfiguration(resp, req)
		if err != nil {
			t.Fatalf("err: %v", err)
		}
		if resp.Code != 200 {
			t.Fatalf("bad code: %d", resp.Code)
		}
		out, ok := obj.(structs.RaftConfigurationResponse)
		if !ok {
			t.Fatalf("unexpected: %T", obj)
		}
		if len(out.Servers) != 1 ||
			!out.Servers[0].Leader ||
			!out.Servers[0].Voter {
			t.Fatalf("bad: %v", out)
		}
	})
}

func TestOperator_RaftPeer(t *testing.T) {
	httpTest(t, func(srv *HTTPServer) {
		body := bytes.NewBuffer(nil)
		req, err := http.NewRequest("DELETE", "/v1/operator/raft/peer?address=nope", body)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		// If we get this error, it proves we sent the address all the
		// way through.
		resp := httptest.NewRecorder()
		_, err = srv.OperatorRaftPeer(resp, req)
		if err == nil || !strings.Contains(err.Error(),
			"address \"nope\" was not found in the Raft configuration") {
			t.Fatalf("err: %v", err)
		}
	})
}

func TestOperator_KeyringInstall(t *testing.T) {
	oldKey := "H3/9gBxcKKRf45CaI2DlRg=="
	newKey := "z90lFx3sZZLtTOkutXcwYg=="
	configFunc := func(c *Config) {
		c.EncryptKey = oldKey
	}
	httpTestWithConfig(t, func(srv *HTTPServer) {
		body := bytes.NewBufferString(fmt.Sprintf("{\"Key\":\"%s\"}", newKey))
		req, err := http.NewRequest("POST", "/v1/operator/keyring", body)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		resp := httptest.NewRecorder()
		_, err = srv.OperatorKeyringEndpoint(resp, req)
		if err != nil {
			t.Fatalf("err: %s", err)
		}

		listResponse, err := srv.agent.ListKeys("", 0)
		if err != nil {
			t.Fatalf("err: %s", err)
		}
		if len(listResponse.Responses) != 2 {
			t.Fatalf("bad: %d", len(listResponse.Responses))
		}

		for _, response := range listResponse.Responses {
			count, ok := response.Keys[newKey]
			if !ok {
				t.Fatalf("bad: %v", response.Keys)
			}
			if count != response.NumNodes {
				t.Fatalf("bad: %d, %d", count, response.NumNodes)
			}
		}
	}, configFunc)
}

func TestOperator_KeyringList(t *testing.T) {
	key := "H3/9gBxcKKRf45CaI2DlRg=="
	configFunc := func(c *Config) {
		c.EncryptKey = key
	}
	httpTestWithConfig(t, func(srv *HTTPServer) {
		req, err := http.NewRequest("GET", "/v1/operator/keyring", nil)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		resp := httptest.NewRecorder()
		r, err := srv.OperatorKeyringEndpoint(resp, req)
		if err != nil {
			t.Fatalf("err: %v", err)
		}
		responses, ok := r.([]*structs.KeyringResponse)
		if !ok {
			t.Fatalf("err: %v", !ok)
		}

		// Check that we get both a LAN and WAN response, and that they both only
		// contain the original key
		if len(responses) != 2 {
			t.Fatalf("bad: %d", len(responses))
		}

		// WAN
		if len(responses[0].Keys) != 1 {
			t.Fatalf("bad: %d", len(responses[0].Keys))
		}
		if !responses[0].WAN {
			t.Fatalf("bad: %v", responses[0].WAN)
		}
		if _, ok := responses[0].Keys[key]; !ok {
			t.Fatalf("bad: %v", ok)
		}

		// LAN
		if len(responses[1].Keys) != 1 {
			t.Fatalf("bad: %d", len(responses[1].Keys))
		}
		if responses[1].WAN {
			t.Fatalf("bad: %v", responses[1].WAN)
		}
		if _, ok := responses[1].Keys[key]; !ok {
			t.Fatalf("bad: %v", ok)
		}
	}, configFunc)
}

func TestOperator_KeyringRemove(t *testing.T) {
	key := "H3/9gBxcKKRf45CaI2DlRg=="
	tempKey := "z90lFx3sZZLtTOkutXcwYg=="
	configFunc := func(c *Config) {
		c.EncryptKey = key
	}
	httpTestWithConfig(t, func(srv *HTTPServer) {
		_, err := srv.agent.InstallKey(tempKey, "", 0)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		// Make sure the temp key is installed
		list, err := srv.agent.ListKeys("", 0)
		if err != nil {
			t.Fatalf("err: %v", err)
		}
		responses := list.Responses
		if len(responses) != 2 {
			t.Fatalf("bad: %d", len(responses))
		}
		for _, response := range responses {
			if len(response.Keys) != 2 {
				t.Fatalf("bad: %d", len(response.Keys))
			}
			if _, ok := response.Keys[tempKey]; !ok {
				t.Fatalf("bad: %v", ok)
			}
		}

		body := bytes.NewBufferString(fmt.Sprintf("{\"Key\":\"%s\"}", tempKey))
		req, err := http.NewRequest("DELETE", "/v1/operator/keyring", body)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		resp := httptest.NewRecorder()
		_, err = srv.OperatorKeyringEndpoint(resp, req)
		if err != nil {
			t.Fatalf("err: %s", err)
		}

		// Make sure the temp key has been removed
		list, err = srv.agent.ListKeys("", 0)
		if err != nil {
			t.Fatalf("err: %v", err)
		}
		responses = list.Responses
		if len(responses) != 2 {
			t.Fatalf("bad: %d", len(responses))
		}
		for _, response := range responses {
			if len(response.Keys) != 1 {
				t.Fatalf("bad: %d", len(response.Keys))
			}
			if _, ok := response.Keys[tempKey]; ok {
				t.Fatalf("bad: %v", ok)
			}
		}
	}, configFunc)
}

func TestOperator_KeyringUse(t *testing.T) {
	oldKey := "H3/9gBxcKKRf45CaI2DlRg=="
	newKey := "z90lFx3sZZLtTOkutXcwYg=="
	configFunc := func(c *Config) {
		c.EncryptKey = oldKey
	}
	httpTestWithConfig(t, func(srv *HTTPServer) {
		if _, err := srv.agent.InstallKey(newKey, "", 0); err != nil {
			t.Fatalf("err: %v", err)
		}

		body := bytes.NewBufferString(fmt.Sprintf("{\"Key\":\"%s\"}", newKey))
		req, err := http.NewRequest("PUT", "/v1/operator/keyring", body)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		resp := httptest.NewRecorder()
		_, err = srv.OperatorKeyringEndpoint(resp, req)
		if err != nil {
			t.Fatalf("err: %s", err)
		}

		if _, err := srv.agent.RemoveKey(oldKey, "", 0); err != nil {
			t.Fatalf("err: %v", err)
		}

		// Make sure only the new key remains
		list, err := srv.agent.ListKeys("", 0)
		if err != nil {
			t.Fatalf("err: %v", err)
		}
		responses := list.Responses
		if len(responses) != 2 {
			t.Fatalf("bad: %d", len(responses))
		}
		for _, response := range responses {
			if len(response.Keys) != 1 {
				t.Fatalf("bad: %d", len(response.Keys))
			}
			if _, ok := response.Keys[newKey]; !ok {
				t.Fatalf("bad: %v", ok)
			}
		}
	}, configFunc)
}

func TestOperator_Keyring_InvalidRelayFactor(t *testing.T) {
	key := "H3/9gBxcKKRf45CaI2DlRg=="
	configFunc := func(c *Config) {
		c.EncryptKey = key
	}
	httpTestWithConfig(t, func(srv *HTTPServer) {
		cases := map[string]string{
			"999":  "Relay factor must be in range",
			"asdf": "Error parsing relay factor",
		}
		for relayFactor, errString := range cases {
			req, err := http.NewRequest("GET", "/v1/operator/keyring?relay-factor="+relayFactor, nil)
			if err != nil {
				t.Fatalf("err: %v", err)
			}

			resp := httptest.NewRecorder()
			_, err = srv.OperatorKeyringEndpoint(resp, req)
			if err != nil {
				t.Fatalf("err: %v", err)
			}
			body := resp.Body.String()
			if !strings.Contains(body, errString) {
				t.Fatalf("bad: %v", body)
			}
		}
	}, configFunc)
}

func TestOperator_AutopilotGetConfiguration(t *testing.T) {
	httpTest(t, func(srv *HTTPServer) {
		body := bytes.NewBuffer(nil)
		req, err := http.NewRequest("GET", "/v1/operator/autopilot/configuration", body)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		resp := httptest.NewRecorder()
		obj, err := srv.OperatorAutopilotConfiguration(resp, req)
		if err != nil {
			t.Fatalf("err: %v", err)
		}
		if resp.Code != 200 {
			t.Fatalf("bad code: %d", resp.Code)
		}
		out, ok := obj.(api.AutopilotConfiguration)
		if !ok {
			t.Fatalf("unexpected: %T", obj)
		}
		if !out.CleanupDeadServers {
			t.Fatalf("bad: %#v", out)
		}
	})
}

func TestOperator_AutopilotSetConfiguration(t *testing.T) {
	httpTest(t, func(srv *HTTPServer) {
		body := bytes.NewBuffer([]byte(`{"CleanupDeadServers": false}`))
		req, err := http.NewRequest("PUT", "/v1/operator/autopilot/configuration", body)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		resp := httptest.NewRecorder()
		if _, err = srv.OperatorAutopilotConfiguration(resp, req); err != nil {
			t.Fatalf("err: %v", err)
		}
		if resp.Code != 200 {
			t.Fatalf("bad code: %d", resp.Code)
		}

		args := structs.DCSpecificRequest{
			Datacenter: "dc1",
		}

		var reply structs.AutopilotConfig
		if err := srv.agent.RPC("Operator.AutopilotGetConfiguration", &args, &reply); err != nil {
			t.Fatalf("err: %v", err)
		}
		if reply.CleanupDeadServers {
			t.Fatalf("bad: %#v", reply)
		}
	})
}

func TestOperator_AutopilotCASConfiguration(t *testing.T) {
	httpTest(t, func(srv *HTTPServer) {
		body := bytes.NewBuffer([]byte(`{"CleanupDeadServers": false}`))
		req, err := http.NewRequest("PUT", "/v1/operator/autopilot/configuration", body)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		resp := httptest.NewRecorder()
		if _, err = srv.OperatorAutopilotConfiguration(resp, req); err != nil {
			t.Fatalf("err: %v", err)
		}
		if resp.Code != 200 {
			t.Fatalf("bad code: %d", resp.Code)
		}

		args := structs.DCSpecificRequest{
			Datacenter: "dc1",
		}

		var reply structs.AutopilotConfig
		if err := srv.agent.RPC("Operator.AutopilotGetConfiguration", &args, &reply); err != nil {
			t.Fatalf("err: %v", err)
		}

		if reply.CleanupDeadServers {
			t.Fatalf("bad: %#v", reply)
		}

		// Create a CAS request, bad index
		{
			buf := bytes.NewBuffer([]byte(`{"CleanupDeadServers": true}`))
			req, err := http.NewRequest("PUT",
				fmt.Sprintf("/v1/operator/autopilot/configuration?cas=%d", reply.ModifyIndex-1), buf)
			if err != nil {
				t.Fatalf("err: %v", err)
			}

			resp := httptest.NewRecorder()
			obj, err := srv.OperatorAutopilotConfiguration(resp, req)
			if err != nil {
				t.Fatalf("err: %v", err)
			}

			if res := obj.(bool); res {
				t.Fatalf("should NOT work")
			}
		}

		// Create a CAS request, good index
		{
			buf := bytes.NewBuffer([]byte(`{"CleanupDeadServers": true}`))
			req, err := http.NewRequest("PUT",
				fmt.Sprintf("/v1/operator/autopilot/configuration?cas=%d", reply.ModifyIndex), buf)
			if err != nil {
				t.Fatalf("err: %v", err)
			}

			resp := httptest.NewRecorder()
			obj, err := srv.OperatorAutopilotConfiguration(resp, req)
			if err != nil {
				t.Fatalf("err: %v", err)
			}

			if res := obj.(bool); !res {
				t.Fatalf("should work")
			}
		}

		// Verify the update
		if err := srv.agent.RPC("Operator.AutopilotGetConfiguration", &args, &reply); err != nil {
			t.Fatalf("err: %v", err)
		}
		if !reply.CleanupDeadServers {
			t.Fatalf("bad: %#v", reply)
		}
	})
}

func TestOperator_ServerHealth(t *testing.T) {
	cb := func(c *Config) {
		c.RaftProtocol = 3
	}
	httpTestWithConfig(t, func(srv *HTTPServer) {
		body := bytes.NewBuffer(nil)
		req, err := http.NewRequest("GET", "/v1/operator/autopilot/health", body)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		testutil.WaitForResult(func() (bool, error) {
			resp := httptest.NewRecorder()
			obj, err := srv.OperatorServerHealth(resp, req)
			if err != nil {
				return false, fmt.Errorf("err: %v", err)
			}
			if resp.Code != 200 {
				return false, fmt.Errorf("bad code: %d", resp.Code)
			}
			out, ok := obj.(*api.OperatorHealthReply)
			if !ok {
				return false, fmt.Errorf("unexpected: %T", obj)
			}
			if len(out.Servers) != 1 ||
				!out.Servers[0].Healthy ||
				out.Servers[0].Name != srv.agent.config.NodeName ||
				out.Servers[0].SerfStatus != "alive" ||
				out.FailureTolerance != 0 {
				return false, fmt.Errorf("bad: %v", out)
			}

			return true, nil
		}, func(err error) {
			t.Fatal(err)
		})

	}, cb)
}

func TestOperator_ServerHealth_Unhealthy(t *testing.T) {
	threshold := time.Duration(-1)
	cb := func(c *Config) {
		c.RaftProtocol = 3
		c.Autopilot.LastContactThreshold = &threshold
	}
	httpTestWithConfig(t, func(srv *HTTPServer) {
		body := bytes.NewBuffer(nil)
		req, err := http.NewRequest("GET", "/v1/operator/autopilot/health", body)
		if err != nil {
			t.Fatalf("err: %v", err)
		}

		testutil.WaitForResult(func() (bool, error) {
			resp := httptest.NewRecorder()
			obj, err := srv.OperatorServerHealth(resp, req)
			if err != nil {
				return false, fmt.Errorf("err: %v", err)
			}
			if resp.Code != 429 {
				return false, fmt.Errorf("bad code: %d", resp.Code)
			}
			out, ok := obj.(*api.OperatorHealthReply)
			if !ok {
				return false, fmt.Errorf("unexpected: %T", obj)
			}
			if len(out.Servers) != 1 ||
				out.Healthy ||
				out.Servers[0].Name != srv.agent.config.NodeName {
				return false, fmt.Errorf("bad: %v", out)
			}

			return true, nil
		}, func(err error) {
			t.Fatal(err)
		})

	}, cb)
}