package tui

import (
	"net/http"
	"net/http/httptest"
	"os"
	"strings"
	"testing"
	"time"

	"billboard/internal/server"
	"billboard/internal/state"
)

func TestFetchDecodesPixels(t *testing.T) {
	st := state.New(8, 4)
	if err := st.SetPixel(3, 2, 9); err != nil {
		t.Fatal(err)
	}
	st.AddMessage("test msg")
	srv := httptest.NewServer(server.New(st, server.Config{}).Handler())
	defer srv.Close()

	d := &Display{server: srv.URL, client: &http.Client{Timeout: 5 * time.Second}}
	if err := d.fetch(); err != nil {
		t.Fatal(err)
	}
	if got := d.state.Pixels[2][3]; got != 9 {
		t.Fatalf("pixel = %d, want 9; state=%+v", got, d.state)
	}
	if len(d.state.Messages) != 1 || d.state.Messages[0].Text != "test msg" {
		t.Fatalf("messages = %+v", d.state.Messages)
	}

	f, err := os.CreateTemp(t.TempDir(), "render")
	if err != nil {
		t.Fatal(err)
	}
	defer f.Close()
	d.out = f
	d.render()
	data, err := os.ReadFile(f.Name())
	if err != nil {
		t.Fatal(err)
	}
	if !strings.Contains(string(data), "91") && !strings.Contains(string(data), "101") {
		t.Fatalf("render output lacks color-9 SGR code; block count: %d", strings.Count(string(data), "▀"))
	}
}