package config_test

import (
	"os"
	"strings"
	"testing"

	"git.t-juice.club/torjus/ezshare/config"
)

var configStrExample = `
########################
# Server configuration #
########################
[Server]
# Set server log-level
# Must be one of: DEBUG, INFO, WARN, ERROR
# Default: INFO
LogLevel = "INFO"

# Server hostname
# Used for generating links
# Required
Hostname = "localhost"

# Endpoint reachable by clients
# Fetched by clients for automatic setup
# Required
GRPCEndpoint = "localhost:50051"

# File store configuration
[Server.FileStore]
# How server stores file
# Must be one of: filesystem, memory, bolt
# Required
Type = "bolt"

[Server.FileStore.Bolt]
# Where the bolt-db is stored
# Required if store-type is bolt
Path = "/data/files.db"

[Server.FileStore.Filesystem]
# Where files are stored
# Required if store-type is filesystem
Dir = "/data"

[Server.DataStore]
# What store to use for users, certs and binaries
# Must be one of: memory, bolt
# Required
Type = "bolt"

[Server.DataStore.Bolt]
# Path to bolt database-file
# Required if Server.Datastore is bolt
Path = "/data/users.db"

# GRPC Configuration
[Server.GRPC]
# Address to listen to
# Default: :50051
ListenAddr = ":50051"

# GRPC Certificate Configuration
[Server.GRPC.CACerts]
# Path of PEM-encoded certificate file
CertificatePath = "/data/ca.pem"
# Path of PEM-encoded private key
# Must be of type ecdsa
CertificateKeyPath = "/data/ca.key"

[Server.GRPC.Certs]
# Path of PEM-encoded certificate file
CertificatePath = "/data/server.pem"
# Path of PEM-encoded private key
# Must be of type ecdsa
CertificateKeyPath = "/data/server.key"

[Server.HTTP]
# Address to listen to
# Default: :8089
ListenAddr = ":8089"


########################
# Client configuration #
########################
[Client]
# Server used if not specified using command-line
DefaultServer = "localhost:50051"
# Path to PEM-encoder server-certificate
ServerCertPath = "/data/server.pem"

[Client.Certs]
# Path of PEM-encoded certificate file
CertificatePath = "/data/client.pem"
# Path of PEM-encoded private key
# Must be of type ecdsa
CertificateKeyPath  = "/data/client.key"
`

var configStrValidClient = `
[Client]
DefaultServer = "localhost:50051"
ServerCertPath = "/data/server.pem"
[Client.Certs]
CertificatePath = "/data/client.pem"
CertificateKeyPath = "/data/client.key"
`

var configStrValidServerMinimal = `
[Server]
LogLevel = "INFO"
Hostname = "localhost"
GRPCEndpoint = "localhost:50051"
[Server.FileStore]
Type = "memory"
[Server.DataStore]
Type = "memory"
[Server.GRPC]
ListenAddr = ":50051"
[Server.GRPC.CACerts]
CertificatePath = "/data/ca.pem"
CertificateKeyPath = "/data/ca.key"
[Server.GRPC.Certs]
CertificatePath = "/data/server.pem"
CertificateKeyPath = "/data/server.key"
[Server.HTTP]
ListenAddr = ":8089"
`

var configStrInvalidServerMissingStoreConfig = `
[Server]
LogLevel = "INFO"
Hostname = "localhost"
GRPCEndpoint = "localhost:50051"
[Server.FileStore]
Type = "bolt"
[Server.DataStore]
Type = "memory"
[Server.GRPC]
ListenAddr = ":50051"
[Server.GRPC.CACerts]
CertificatePath = "/data/ca.pem"
CertificateKeyPath = "/data/ca.key"
[Server.GRPC.Certs]
CertificatePath = "/data/server.pem"
CertificateKeyPath = "/data/server.key"
[Server.HTTP]
ListenAddr = ":8089"
`

func TestConfig(t *testing.T) {
	t.Run("TestValid", func(t *testing.T) {

		testCases := []struct {
			Name           string
			ConfigString   string
			ValidForClient bool
			ValidForServer bool
		}{
			{
				Name:           "ExampleConfig",
				ConfigString:   configStrExample,
				ValidForClient: true,
				ValidForServer: true,
			},
			{
				Name:           "ServerValidMinimal",
				ConfigString:   configStrValidServerMinimal,
				ValidForServer: true,
			},
			{
				Name:           "ClientValidMinimal",
				ConfigString:   configStrValidClient,
				ValidForClient: true,
			},
			{
				Name:         "ServerInvalidMissingStoreConfig",
				ConfigString: configStrInvalidServerMissingStoreConfig,
			},
		}

		for _, c := range testCases {
			t.Run(c.Name, func(t *testing.T) {
				sr := strings.NewReader(c.ConfigString)
				cfg, err := config.FromReader(sr)
				if err != nil {
					t.Fatalf("Error reading config: %s", err)
				}

				if c.ValidForClient && !(cfg.Client.Valid() == nil) {
					t.Errorf("Valid config ValidClientConfig returned wrong result: %s", cfg.Client.Valid())
				}
				if !c.ValidForClient && (cfg.Client.Valid() == nil) {
					t.Errorf("Invalid config ValidClientConfig returned wrong result: %s", cfg.Client.Valid())
				}
				if c.ValidForServer && !(cfg.Server.Valid() == nil) {
					t.Errorf("Valid config ValidServerConfig returned wrong result: %s", cfg.Server.Valid())
				}
				if !c.ValidForServer && (cfg.Server.Valid() == nil) {
					t.Errorf("Invalid config ValidServerConfig returned wrong result: %s", cfg.Server.Valid())
				}
			})
		}
	})
	t.Run("FromEnv", func(t *testing.T) {
		// Unset any existing ezshare env vars
		for _, env := range os.Environ() {
			if strings.HasPrefix(env, "EZSHARE") {
				os.Unsetenv(env)
			}
		}

		cfg := config.FromDefault()
		// Test Server.LogLevel
		if cfg.Server.LogLevel == "WARN" {
			t.Errorf("Loglevel is WARN before updating from env.")
		}
		os.Setenv("EZSHARE_SERVER_LOGLEVEL", "WARN")
		cfg.UpdateFromEnv()
		if cfg.Server.LogLevel != "WARN" {
			t.Errorf("Loglevel is not WARN after updating from env.")
		}

		// Test Server.Hostname
		hostname := "https://share.example.org"
		os.Setenv("EZSHARE_SERVER_HOSTNAME", hostname)
		cfg.UpdateFromEnv()
		if cfg.Server.Hostname != hostname {
			t.Errorf("Hostname is incorrect after updating from env.")
		}

		// Test Server.Datastore.Bolt.Path
		boltPath := "/data/bolt.db"
		os.Setenv("EZSHARE_SERVER_DATASTORE_BOLT_PATH", boltPath)
		cfg.UpdateFromEnv()
		if cfg.Server.DataStoreConfig.BoltStoreConfig.Path != boltPath {
			t.Errorf("Bolt path is incorrect after updating from env.")
		}

		// Test Server.Datastore.Bolt.Path
		caCertPath := "/data/cert.pem"
		os.Setenv("EZSHARE_SERVER_GRPC_CACERTS_CERTIFICATEKEYPATH", caCertPath)
		cfg.UpdateFromEnv()
		if cfg.Server.GRPC.CACerts.CertificateKeyPath != caCertPath {
			t.Errorf("GPRC CA Cert path is incorrect after updating from env.")
		}
	})
}