package main

import (
	"bytes"
	"testing"

	intrgb "netdome.biz/paul/qmk-rgb/internal/rgb"
)

// README.md: "Without a zone the profile is applied to every channel it names."
// A profile key names a channel, so a load applies only the keys that resolve to
// a selected channel. The keys themselves are resolved by resolveZoneName, which
// channels_test.go covers; what matters here is that a key is never applied to a
// channel it does not name.

func TestLoadAppliesOnlyTheKeysTheSelectionNames(t *testing.T) {
	t.Cleanup(vendoredDefinitions(t))
	dir := t.TempDir()
	profile := Profile{
		Name:    "three",
		Version: 1,
		Zones: map[string]*ZoneSettings{
			"logo":      {Enabled: true, Effect: "light", Brightness: 100, Speed: 1, Color: "00ff"},
			"backlight": {Enabled: true, Effect: "solid_color", Brightness: 100, Speed: 1, Color: "00ff"},
			"side":      {Enabled: true, Effect: "wave", Brightness: 100, Speed: 1, Color: "00ff"},
		},
	}
	originalDir := profilesDirOverride
	t.Cleanup(func() { profilesDirOverride = originalDir })
	profilesDirOverride = dir

	if err := profile.Save(); err != nil {
		t.Fatalf("save profile: %v", err)
	}

	tests := []struct {
		name        string
		zoneFlag    string
		wantApplied int
	}{
		{"no flag applies all three", "", 3},
		{"logo applies one", "logo", 1},
		{"backlight applies one", "backlight", 1},
		{"side applies one", "side", 1},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			proto := &verifyingProtocol{}
			restore := stubTargetForProfileTest(t, proto, tt.zoneFlag, impact80Display())
			defer restore()

			cmd := NewProfileLoadCmd()
			cmd.SetOut(&bytes.Buffer{})
			cmd.SetErr(&bytes.Buffer{})
			cmd.SetArgs([]string{"three"})

			if err := cmd.Execute(); err != nil {
				t.Fatalf("load returned error: %v", err)
			}
			if got := effectWrites(proto); got != tt.wantApplied {
				t.Errorf("effect writes = %d, want %d", got, tt.wantApplied)
			}
		})
	}
}

// effectWrites counts the effect writes, one per applied channel.
func effectWrites(proto *verifyingProtocol) int {
	count := 0
	for _, r := range proto.reports {
		if r.param == uint8(intrgb.EffectID) {
			count++
		}
	}
	return count
}

// A key the selection leaves out is the user's own choice, and saying the
// keyboard lacks it is false. Only a key that resolves to a channel the
// keyboard does not have is reported.
func TestLoadIsQuietAboutAKeyTheSelectionExcludes(t *testing.T) {
	t.Cleanup(vendoredDefinitions(t))
	dir := t.TempDir()
	originalDir := profilesDirOverride
	t.Cleanup(func() { profilesDirOverride = originalDir })
	profilesDirOverride = dir

	profile := Profile{
		Name:    "three",
		Version: 1,
		Zones: map[string]*ZoneSettings{
			"logo":      {Enabled: true, Effect: "light", Brightness: 100, Speed: 1, Color: "00ff"},
			"backlight": {Enabled: true, Effect: "solid_color", Brightness: 100, Speed: 1, Color: "00ff"},
		},
	}
	if err := profile.Save(); err != nil {
		t.Fatalf("save profile: %v", err)
	}

	proto := &verifyingProtocol{}
	t.Cleanup(stubTargetForProfileTest(t, proto, "logo", impact80Display()))

	var stderr bytes.Buffer
	cmd := NewProfileLoadCmd()
	cmd.SetOut(&bytes.Buffer{})
	cmd.SetErr(&stderr)
	cmd.SetArgs([]string{"three"})

	if err := cmd.Execute(); err != nil {
		t.Fatalf("load returned error: %v", err)
	}
	if stderr.Len() != 0 {
		t.Errorf("stderr = %q, want nothing for a channel the selection excluded", stderr.String())
	}
	if got := effectWrites(proto); got != 1 {
		t.Errorf("effect writes = %d, want 1", got)
	}
}