package api

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

	"codespace/internal/process"
	"codespace/internal/service"
	"codespace/internal/workspace"

	"github.com/gin-gonic/gin"
	"github.com/gorilla/websocket"
)

func TestProcessWS(t *testing.T) {
	tmpDir := t.TempDir()

	opencodePath := filepath.Join(tmpDir, "opencode")
	script := []byte("#!/bin/sh\nread line\necho \"got: $line\"\nsleep 0.1\nexit 0\n")
	if err := os.WriteFile(opencodePath, script, 0o755); err != nil {
		t.Fatalf("write fake opencode: %v", err)
	}

	wsRoot := filepath.Join(tmpDir, "workspaces")
	wsMgr := workspace.NewLocalManager(wsRoot)
	procMgr := process.NewManager(opencodePath)
	wsSvc := service.NewWorkspaceService(wsMgr, procMgr, nil)
	fileSvc := service.NewFileService(wsMgr, 1<<20)
	procSvc := service.NewProcessService(wsMgr, procMgr, nil)

	r := NewRouter(wsSvc, fileSvc, procSvc, nil, gin.TestMode)
	srv := httptest.NewServer(r)
	defer srv.Close()

	ws, err := wsSvc.Create("wstest")
	if err != nil {
		t.Fatalf("create workspace: %v", err)
	}
	t.Cleanup(func() {
		if err := wsSvc.Delete(ws.ID); err != nil {
			t.Logf("cleanup delete workspace: %v", err)
		}
	})

	if err := procSvc.Start(ws.ID); err != nil {
		t.Fatalf("start process: %v", err)
	}

	wsURL := "ws" + strings.TrimPrefix(srv.URL, "http") + "/api/workspaces/" + ws.ID + "/process/ws"
	conn, _, err := websocket.DefaultDialer.Dial(wsURL, nil)
	if err != nil {
		t.Fatalf("dial websocket: %v", err)
	}
	defer conn.Close()

	if err := conn.WriteMessage(websocket.TextMessage, []byte("hello\n")); err != nil {
		t.Fatalf("write message: %v", err)
	}

	if err := conn.SetReadDeadline(time.Now().Add(3 * time.Second)); err != nil {
		t.Fatalf("set read deadline: %v", err)
	}

	var gotEcho, gotExit bool
	for {
		_, data, err := conn.ReadMessage()
		if err != nil {
			break
		}
		text := string(data)
		if strings.Contains(text, "got: hello") {
			gotEcho = true
		}
		if strings.Contains(text, "[process exited") {
			gotExit = true
			break
		}
	}

	if !gotEcho {
		t.Fatal("did not receive echo frame containing \"got: hello\"")
	}
	if !gotExit {
		t.Fatal("did not receive exit banner frame")
	}
}