package codersdk_test

import (
	"strings"
	"testing"
	"time"

	"github.com/stretchr/testify/require"

	"github.com/coder/coder/v2/cli/clibase"
	"github.com/coder/coder/v2/codersdk"
)

type exclusion struct {
	flag bool
	env  bool
	yaml bool
}

func TestDeploymentValues_HighlyConfigurable(t *testing.T) {
	t.Parallel()

	// This test ensures that every deployment option has
	// a corresponding Flag, Env, and YAML name, unless explicitly excluded.

	excludes := map[string]exclusion{
		// These are used to configure YAML support itself, so
		// they make no sense within the YAML file.
		"Config Path": {
			yaml: true,
		},
		"Write Config": {
			yaml: true,
			env:  true,
		},
		// Dangerous values? Not sure we should help users
		// persistent their configuration.
		"DANGEROUS: Allow Path App Sharing": {
			yaml: true,
		},
		"DANGEROUS: Allow Site Owners to Access Path Apps": {
			yaml: true,
		},
		// Secrets
		"Trace Honeycomb API Key": {
			yaml: true,
		},
		"OAuth2 GitHub Client Secret": {
			yaml: true,
		},
		"OIDC Client Secret": {
			yaml: true,
		},
		"Postgres Connection URL": {
			yaml: true,
		},
		"SCIM API Key": {
			yaml: true,
		},
		// These complex objects should be configured through YAML.
		"Support Links": {
			flag: true,
			env:  true,
		},
		"Git Auth Providers": {
			// Technically Git Auth Providers can be provided through the env,
			// but bypassing clibase. See cli.ReadGitAuthProvidersFromEnv.
			flag: true,
			env:  true,
		},
	}

	set := (&codersdk.DeploymentValues{}).Options()
	for _, opt := range set {
		// These are generally for development, so their configurability is
		// not relevant.
		if opt.Hidden {
			delete(excludes, opt.Name)
			continue
		}

		if codersdk.IsSecretDeploymentOption(opt) && opt.YAML != "" {
			// Secrets should not be written to YAML and instead should continue
			// to be read from the environment.
			//
			// Unfortunately, secrets are still accepted through flags for
			// legacy purposes. Eventually, we should prevent that.
			t.Errorf("Option %q is a secret but has a YAML name", opt.Name)
		}

		excluded := excludes[opt.Name]
		switch {
		case opt.YAML == "" && !excluded.yaml:
			t.Errorf("Option %q should have a YAML name", opt.Name)
		case opt.YAML != "" && excluded.yaml:
			t.Errorf("Option %q is excluded but has a YAML name", opt.Name)
		case opt.Flag == "" && !excluded.flag:
			t.Errorf("Option %q should have a flag name", opt.Name)
		case opt.Flag != "" && excluded.flag:
			t.Errorf("Option %q is excluded but has a flag name", opt.Name)
		case opt.Env == "" && !excluded.env:
			t.Errorf("Option %q should have an env name", opt.Name)
		case opt.Env != "" && excluded.env:
			t.Errorf("Option %q is excluded but has an env name", opt.Name)
		}

		// Also check all env vars are prefixed with CODER_
		const prefix = "CODER_"
		if opt.Env != "" && !strings.HasPrefix(opt.Env, prefix) {
			t.Errorf("Option %q has an env name (%q) that is not prefixed with %s", opt.Name, opt.Env, prefix)
		}

		delete(excludes, opt.Name)
	}

	for opt := range excludes {
		t.Errorf("Excluded option %q is not in the deployment config. Remove it?", opt)
	}
}

func TestSSHConfig_ParseOptions(t *testing.T) {
	t.Parallel()

	testCases := []struct {
		Name          string
		ConfigOptions clibase.StringArray
		ExpectError   bool
		Expect        map[string]string
	}{
		{
			Name:          "Empty",
			ConfigOptions: []string{},
			Expect:        map[string]string{},
		},
		{
			Name: "Whitespace",
			ConfigOptions: []string{
				"test value",
			},
			Expect: map[string]string{
				"test": "value",
			},
		},
		{
			Name: "SimpleValueEqual",
			ConfigOptions: []string{
				"test=value",
			},
			Expect: map[string]string{
				"test": "value",
			},
		},
		{
			Name: "SimpleValues",
			ConfigOptions: []string{
				"test=value",
				"foo=bar",
			},
			Expect: map[string]string{
				"test": "value",
				"foo":  "bar",
			},
		},
		{
			Name: "ValueWithQuote",
			ConfigOptions: []string{
				"bar=buzz=bazz",
			},
			Expect: map[string]string{
				"bar": "buzz=bazz",
			},
		},
		{
			Name: "NoEquals",
			ConfigOptions: []string{
				"foobar",
			},
			ExpectError: true,
		},
	}

	for _, tt := range testCases {
		tt := tt
		t.Run(tt.Name, func(t *testing.T) {
			t.Parallel()
			c := codersdk.SSHConfig{
				SSHConfigOptions: tt.ConfigOptions,
			}
			got, err := c.ParseOptions()
			if tt.ExpectError {
				require.Error(t, err, tt.ConfigOptions.String())
			} else {
				require.NoError(t, err, tt.ConfigOptions.String())
				require.Equalf(t, tt.Expect, got, tt.ConfigOptions.String())
			}
		})
	}
}

func TestTimezoneOffsets(t *testing.T) {
	t.Parallel()

	testCases := []struct {
		Name           string
		Loc            *time.Location
		ExpectedOffset int
	}{
		{
			Name:           "UTX",
			Loc:            time.UTC,
			ExpectedOffset: 0,
		},
		{
			Name:           "Eastern",
			Loc:            must(time.LoadLocation("America/New_York")),
			ExpectedOffset: -4,
		},
		{
			Name:           "Central",
			Loc:            must(time.LoadLocation("America/Chicago")),
			ExpectedOffset: -5,
		},
		{
			Name:           "Ireland",
			Loc:            must(time.LoadLocation("Europe/Dublin")),
			ExpectedOffset: 1,
		},
		{
			Name: "HalfHourTz",
			// This timezone is +6:30, but the function rounds to the nearest hour.
			// This is intentional because our DAUs endpoint only covers 1-hour offsets.
			// If the user is in a non-hour timezone, they get the closest hour bucket.
			Loc:            must(time.LoadLocation("Asia/Yangon")),
			ExpectedOffset: 6,
		},
	}

	for _, c := range testCases {
		c := c
		t.Run(c.Name, func(t *testing.T) {
			t.Parallel()

			offset := codersdk.TimezoneOffsetHour(c.Loc)
			require.Equal(t, c.ExpectedOffset, offset)
		})
	}
}

func must[T any](value T, err error) T {
	if err != nil {
		panic(err)
	}
	return value
}