package main

import (
	"bytes"
	"os"
	"os/exec"
	"path/filepath"
	"strings"
	"testing"
)

func TestInstallFromFreshCheckout(t *testing.T) {
	tmp := t.TempDir()
	source := filepath.Join(tmp, "source")
	bin := filepath.Join(tmp, "bin")
	for _, dir := range []string{source, bin} {
		if err := os.Mkdir(dir, 0o755); err != nil {
			t.Fatal(err)
		}
	}
	entries, err := os.ReadDir(".")
	if err != nil {
		t.Fatal(err)
	}
	for _, entry := range entries {
		if !entry.Type().IsRegular() || entry.Name() == "state.toml" {
			continue
		}
		data, err := os.ReadFile(entry.Name())
		if err != nil {
			t.Fatal(err)
		}
		if err := os.WriteFile(filepath.Join(source, entry.Name()), data, 0o644); err != nil {
			t.Fatal(err)
		}
	}
	writeExecutable(t, filepath.Join(bin, "tinty"), `#!/bin/sh
case "$1" in
  sync|info) exit 0 ;;
  apply) printf '%s\n' "$2" >> "$TINTY_LOG" ;;
  *) exit 2 ;;
esac
`)
	for _, name := range []string{"dark-notify", "launchctl"} {
		writeExecutable(t, filepath.Join(bin, name), "#!/bin/sh\nexit 0\n")
	}
	home := filepath.Join(tmp, "home")
	config := filepath.Join(home, ".config")
	log := filepath.Join(tmp, "applied")
	cache, err := exec.Command("go", "env", "GOMODCACHE").Output()
	if err != nil {
		t.Fatal(err)
	}
	t.Setenv("GOMODCACHE", strings.TrimSpace(string(cache)))
	t.Setenv("PATH", bin+":"+os.Getenv("PATH"))
	t.Setenv("TINTY_LOG", log)
	install := func() {
		t.Helper()
		cmd := exec.Command("make", "install", "HOME="+home, "XDG_CONFIG_HOME="+config)
		cmd.Dir = source
		if output, err := cmd.CombinedOutput(); err != nil {
			t.Fatalf("install failed: %v\n%s", err, output)
		}
	}
	install()
	statePath := filepath.Join(config, "tinted-theming", "tinty", "state.toml")
	value, err := loadState(statePath)
	if err != nil {
		t.Fatalf("fresh install did not provide usable state: %v", err)
	}
	cmd := exec.Command(filepath.Join(home, ".local", "bin", "tint"), "swamp")
	cmd.Env = append(os.Environ(), "TINT_STATE_FILE="+statePath, "TINTY_PAIR_APPEARANCE=dark")
	if output, err := cmd.CombinedOutput(); err != nil {
		t.Fatalf("selecting an installed pair failed: %v\n%s", err, output)
	}
	if got := strings.TrimSpace(readFile(t, log)); got != "base16-swamp-dark" {
		t.Fatalf("applied theme = %q, want base16-swamp-dark", got)
	}
	value.Current = currentPair{Light: "personal-light", Dark: "personal-dark"}
	if err := saveState(statePath, value); err != nil {
		t.Fatal(err)
	}
	before, err := os.ReadFile(statePath)
	if err != nil {
		t.Fatal(err)
	}
	install()
	after, err := os.ReadFile(statePath)
	if err != nil {
		t.Fatal(err)
	}
	if !bytes.Equal(before, after) {
		t.Fatal("reinstall overwrote personal state")
	}
}