package cli_test

import (
	"fmt"
	"io"
	"os"
	"testing"
	"time"

	. "github.com/smartystreets/goconvey/convey"
	"golang.org/x/crypto/bcrypt"

	"zotregistry.io/zot/pkg/cli"
	"zotregistry.io/zot/pkg/test"
)

func TestConfigReloader(t *testing.T) {
	oldArgs := os.Args

	defer func() { os.Args = oldArgs }()

	Convey("reload access control config", t, func(c C) {
		port := test.GetFreePort()
		baseURL := test.GetBaseURL(port)

		logFile, err := os.CreateTemp("", "zot-log*.txt")
		So(err, ShouldBeNil)

		username := "alice"
		password := "alice"

		hash, err := bcrypt.GenerateFromPassword([]byte(password), 10)
		if err != nil {
			panic(err)
		}

		usernameAndHash := fmt.Sprintf("%s:%s", username, string(hash))

		htpasswdPath := test.MakeHtpasswdFileFromString(usernameAndHash)
		defer os.Remove(htpasswdPath)

		defer os.Remove(logFile.Name()) // clean up

		content := fmt.Sprintf(`{
			"distSpecVersion": "0.1.0-dev",
			"storage": {
			  "rootDirectory": "/tmp/zot"
			},
			"http": {
			  "address": "127.0.0.1",
			  "port": "%s",
			  "realm": "zot",
			  "auth": {
				"htpasswd": {
				  "path": "%s"
				},
				"failDelay": 1
			  },
			  "accessControl": {
				"**": {
				  "policies": [
					{
					  "users": ["charlie"],
					  "actions": ["read"]
					}
				  ],
				  "defaultPolicy": ["read", "create"] 
				},
				"adminPolicy": {
					"users": ["admin"],
					"actions": ["read", "create", "update", "delete"]
				}
			  }
			},
			"log": {
			  "level": "debug",
			  "output": "%s"
			}
		  }`, port, htpasswdPath, logFile.Name())

		cfgfile, err := os.CreateTemp("", "zot-test*.json")
		So(err, ShouldBeNil)

		defer os.Remove(cfgfile.Name()) // clean up

		_, err = cfgfile.Write([]byte(content))
		So(err, ShouldBeNil)

		// err = cfgfile.Close()
		// So(err, ShouldBeNil)

		os.Args = []string{"cli_test", "serve", cfgfile.Name()}
		go func() {
			err = cli.NewServerRootCmd().Execute()
			So(err, ShouldBeNil)
		}()

		test.WaitTillServerReady(baseURL)

		content = fmt.Sprintf(`{
			"distSpecVersion": "0.1.0-dev",
			"storage": {
			  "rootDirectory": "/tmp/zot"
			},
			"http": {
			  "address": "127.0.0.1",
			  "port": "%s",
			  "realm": "zot",
			  "auth": {
				"htpasswd": {
				  "path": "%s"
				},
				"failDelay": 1
			  },
			  "accessControl": {
				"**": {
				  "policies": [
					{
					  "users": ["alice"],
					  "actions": ["read", "create", "update", "delete"]
					}
				  ],
				  "defaultPolicy": ["read"] 
				},
				"adminPolicy": {
					"users": ["admin"],
					"actions": ["read", "create", "update", "delete"]
				}
			  }
			},
			"log": {
			  "level": "debug",
			  "output": "%s"
			}
		}`, port, htpasswdPath, logFile.Name())

		err = cfgfile.Truncate(0)
		So(err, ShouldBeNil)

		_, err = cfgfile.Seek(0, io.SeekStart)
		So(err, ShouldBeNil)

		_, err = cfgfile.WriteString(content)
		So(err, ShouldBeNil)

		err = cfgfile.Close()
		So(err, ShouldBeNil)

		// wait for config reload
		time.Sleep(2 * time.Second)

		data, err := os.ReadFile(logFile.Name())
		So(err, ShouldBeNil)
		So(string(data), ShouldContainSubstring, "reloaded params")
		So(string(data), ShouldContainSubstring, "new configuration settings")
		So(string(data), ShouldContainSubstring, "\"Users\":[\"alice\"]")
		So(string(data), ShouldContainSubstring, "\"Actions\":[\"read\",\"create\",\"update\",\"delete\"]")
	})

	Convey("reload sync config", t, func(c C) {
		port := test.GetFreePort()
		baseURL := test.GetBaseURL(port)

		logFile, err := os.CreateTemp("", "zot-log*.txt")
		So(err, ShouldBeNil)

		defer os.Remove(logFile.Name()) // clean up

		content := fmt.Sprintf(`{
				"distSpecVersion": "0.1.0-dev",
				"storage": {
					"rootDirectory": "/tmp/zot"
				},
				"http": {
					"address": "127.0.0.1",
					"port": "%s"
				},
				"log": {
					"level": "debug",
					"output": "%s"
				},
				"extensions": {
					"sync": {
						"registries": [{
							"urls": ["http://localhost:8080"],
							"tlsVerify": false,
							"onDemand": true,
							"maxRetries": 3,
							"retryDelay": "15m",
							"certDir": "",
							"content":[
								{
									"prefix": "zot-test",
									"tags": {
										"regex": ".*",
										"semver": true
									}
								}
							]
						}]
					}
				}
			}`, port, logFile.Name())

		cfgfile, err := os.CreateTemp("", "zot-test*.json")
		So(err, ShouldBeNil)

		defer os.Remove(cfgfile.Name()) // clean up

		_, err = cfgfile.Write([]byte(content))
		So(err, ShouldBeNil)

		// err = cfgfile.Close()
		// So(err, ShouldBeNil)

		os.Args = []string{"cli_test", "serve", cfgfile.Name()}
		go func() {
			err = cli.NewServerRootCmd().Execute()
			So(err, ShouldBeNil)
		}()

		test.WaitTillServerReady(baseURL)

		content = fmt.Sprintf(`{
			"distSpecVersion": "0.1.0-dev",
			"storage": {
				"rootDirectory": "/tmp/zot"
			},
			"http": {
				"address": "127.0.0.1",
				"port": "%s"
			},
			"log": {
				"level": "debug",
				"output": "%s"
			},
			"extensions": {
				"sync": {
					"registries": [{
						"urls": ["http://localhost:9999"],
						"tlsVerify": true,
						"onDemand": false,
						"maxRetries": 10,
						"retryDelay": "5m",
						"certDir": "certs",
						"content":[
							{
								"prefix": "zot-cve-test",
								"tags": {
									"regex": "tag",
									"semver": false
								}
							}
						]
					}]
				}
			}
		}`, port, logFile.Name())

		err = cfgfile.Truncate(0)
		So(err, ShouldBeNil)

		_, err = cfgfile.Seek(0, io.SeekStart)
		So(err, ShouldBeNil)

		_, err = cfgfile.WriteString(content)
		So(err, ShouldBeNil)

		err = cfgfile.Close()
		So(err, ShouldBeNil)

		// wait for config reload
		time.Sleep(2 * time.Second)

		data, err := os.ReadFile(logFile.Name())
		So(err, ShouldBeNil)
		So(string(data), ShouldContainSubstring, "reloaded params")
		So(string(data), ShouldContainSubstring, "new configuration settings")
		So(string(data), ShouldContainSubstring, "\"URLs\":[\"http://localhost:9999\"]")
		So(string(data), ShouldContainSubstring, "\"TLSVerify\":true")
		So(string(data), ShouldContainSubstring, "\"OnDemand\":false")
		So(string(data), ShouldContainSubstring, "\"MaxRetries\":10")
		So(string(data), ShouldContainSubstring, "\"RetryDelay\":300000000000")
		So(string(data), ShouldContainSubstring, "\"CertDir\":\"certs\"")
		So(string(data), ShouldContainSubstring, "\"Prefix\":\"zot-cve-test\"")
		So(string(data), ShouldContainSubstring, "\"Regex\":\"tag\"")
		So(string(data), ShouldContainSubstring, "\"Semver\":false")
	})

	Convey("reload bad config", t, func(c C) {
		port := test.GetFreePort()
		baseURL := test.GetBaseURL(port)

		logFile, err := os.CreateTemp("", "zot-log*.txt")
		So(err, ShouldBeNil)

		defer os.Remove(logFile.Name()) // clean up

		content := fmt.Sprintf(`{
				"distSpecVersion": "0.1.0-dev",
				"storage": {
					"rootDirectory": "/tmp/zot"
				},
				"http": {
					"address": "127.0.0.1",
					"port": "%s"
				},
				"log": {
					"level": "debug",
					"output": "%s"
				},
				"extensions": {
					"sync": {
						"registries": [{
							"urls": ["http://localhost:8080"],
							"tlsVerify": false,
							"onDemand": true,
							"maxRetries": 3,
							"retryDelay": "15m",
							"certDir": "",
							"content":[
								{
									"prefix": "zot-test",
									"tags": {
										"regex": ".*",
										"semver": true
									}
								}
							]
						}]
					}
				}
			}`, port, logFile.Name())

		cfgfile, err := os.CreateTemp("", "zot-test*.json")
		So(err, ShouldBeNil)

		defer os.Remove(cfgfile.Name()) // clean up

		_, err = cfgfile.Write([]byte(content))
		So(err, ShouldBeNil)

		// err = cfgfile.Close()
		// So(err, ShouldBeNil)

		os.Args = []string{"cli_test", "serve", cfgfile.Name()}
		go func() {
			err = cli.NewServerRootCmd().Execute()
			So(err, ShouldBeNil)
		}()

		test.WaitTillServerReady(baseURL)

		content = "[]"

		err = cfgfile.Truncate(0)
		So(err, ShouldBeNil)

		_, err = cfgfile.Seek(0, io.SeekStart)
		So(err, ShouldBeNil)

		_, err = cfgfile.WriteString(content)
		So(err, ShouldBeNil)

		err = cfgfile.Close()
		So(err, ShouldBeNil)

		// wait for config reload
		time.Sleep(2 * time.Second)

		data, err := os.ReadFile(logFile.Name())
		So(err, ShouldBeNil)
		So(string(data), ShouldNotContainSubstring, "reloaded params")
		So(string(data), ShouldNotContainSubstring, "new configuration settings")
		So(string(data), ShouldContainSubstring, "\"URLs\":[\"http://localhost:8080\"]")
		So(string(data), ShouldContainSubstring, "\"TLSVerify\":false")
		So(string(data), ShouldContainSubstring, "\"OnDemand\":true")
		So(string(data), ShouldContainSubstring, "\"MaxRetries\":3")
		So(string(data), ShouldContainSubstring, "\"CertDir\":\"\"")
		So(string(data), ShouldContainSubstring, "\"Prefix\":\"zot-test\"")
		So(string(data), ShouldContainSubstring, "\"Regex\":\".*\"")
		So(string(data), ShouldContainSubstring, "\"Semver\":true")
	})
}