package config

import (
	"strings"
	"testing"

	"github.com/datarhei/core/v16/config/vars"
	"github.com/datarhei/core/v16/io/fs"

	"github.com/stretchr/testify/require"
)

func TestConfigCopy(t *testing.T) {
	fs, _ := fs.NewMemFilesystem(fs.MemConfig{})
	config1 := New(fs)

	config1.Version = 42
	config1.DB.Dir = "foo"

	val1, _ := config1.Get("version")
	val2, _ := config1.Get("db.dir")
	val3, _ := config1.Get("host.name")

	require.Equal(t, "42", val1)
	require.Equal(t, "foo", val2)
	require.Equal(t, "(empty)", val3)

	config1.Set("host.name", "foo.com")
	val3, _ = config1.Get("host.name")
	require.Equal(t, "foo.com", val3)

	config2 := config1.Clone()

	require.Equal(t, int64(42), config2.Version)
	require.Equal(t, "foo", config2.DB.Dir)
	require.Equal(t, []string{"foo.com"}, config2.Host.Name)

	config1.Set("version", "77")

	require.Equal(t, int64(77), config1.Version)
	require.Equal(t, int64(42), config2.Version)

	config1.Set("db.dir", "bar")

	require.Equal(t, "bar", config1.DB.Dir)
	require.Equal(t, "foo", config2.DB.Dir)

	config2.DB.Dir = "baz"

	require.Equal(t, "bar", config1.DB.Dir)
	require.Equal(t, "baz", config2.DB.Dir)

	config1.Host.Name[0] = "bar.com"

	require.Equal(t, []string{"bar.com"}, config1.Host.Name)
	require.Equal(t, []string{"foo.com"}, config2.Host.Name)
}

// TestConfigCopyWebRTC is a regression test for Clone() silently dropping the
// WebRTC Data section. The first live M2 deploy surfaced this: env vars bound
// correctly onto the original Config, but Core handed the clone to app/api, so
// cfg.WebRTC.Enable was always the zero value and the subsystem was skipped.
func TestConfigCopyWebRTC(t *testing.T) {
	fs, _ := fs.NewMemFilesystem(fs.MemConfig{})
	config1 := New(fs)

	config1.WebRTC.Enable = true
	config1.WebRTC.PublicIP = "10.0.0.25"
	config1.WebRTC.NAT1To1IPs = []string{"10.0.0.25", "203.0.113.10"}
	config1.WebRTC.UDPMuxPort = 45000

	config2 := config1.Clone()

	require.Equal(t, true, config2.WebRTC.Enable)
	require.Equal(t, "10.0.0.25", config2.WebRTC.PublicIP)
	require.Equal(t, []string{"10.0.0.25", "203.0.113.10"}, config2.WebRTC.NAT1To1IPs)
	require.Equal(t, 45000, config2.WebRTC.UDPMuxPort)

	// NAT1To1IPs is a slice — mutating the clone must not affect the
	// source, which is what every other section guarantees via
	// copy.Slice. Same contract for WebRTC.
	config2.WebRTC.NAT1To1IPs[0] = "mutated"
	require.Equal(t, "10.0.0.25", config1.WebRTC.NAT1To1IPs[0])
}

func TestValidateDefault(t *testing.T) {
	fs, err := fs.NewMemFilesystem(fs.MemConfig{})
	require.NoError(t, err)

	size, fresh, err := fs.WriteFileReader("./mime.types", strings.NewReader("xxxxx"))
	require.Equal(t, int64(5), size)
	require.Equal(t, true, fresh)
	require.NoError(t, err)

	_, _, err = fs.WriteFileReader("/bin/ffmpeg", strings.NewReader("xxxxx"))
	require.NoError(t, err)

	cfg := New(fs)

	cfg.Validate(true)

	errors := []string{}
	cfg.Messages(func(level string, v vars.Variable, message string) {
		if level == "error" {
			errors = append(errors, message)
		}
	})

	require.Equal(t, 0, len(cfg.Overrides()))
	require.Equal(t, false, cfg.HasErrors(), errors)
}
