package handler

import (
	"bytes"
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/go-chi/chi/v5"
	"github.com/multica-ai/multica/server/internal/middleware"
)

// newDaemonTokenRequest creates an HTTP request with daemon token context set
// (simulating DaemonAuth middleware for mdt_ tokens).
func newDaemonTokenRequest(method, path string, body any, workspaceID, daemonID string) *http.Request {
	var buf bytes.Buffer
	if body != nil {
		json.NewEncoder(&buf).Encode(body)
	}
	req := httptest.NewRequest(method, path, &buf)
	req.Header.Set("Content-Type", "application/json")
	// No X-User-ID — daemon tokens don't set it.
	ctx := middleware.WithDaemonContext(req.Context(), workspaceID, daemonID)
	return req.WithContext(ctx)
}

func TestDaemonRegister_WithDaemonToken(t *testing.T) {
	if testHandler == nil {
		t.Skip("database not available")
	}

	w := httptest.NewRecorder()
	req := newDaemonTokenRequest("POST", "/api/daemon/register", map[string]any{
		"workspace_id": testWorkspaceID,
		"daemon_id":    "test-daemon-mdt",
		"device_name":  "test-device",
		"runtimes": []map[string]any{
			{"name": "test-runtime", "type": "claude", "version": "1.0.0", "status": "online"},
		},
	}, testWorkspaceID, "test-daemon-mdt")

	testHandler.DaemonRegister(w, req)
	if w.Code != http.StatusOK {
		t.Fatalf("DaemonRegister with daemon token: expected 200, got %d: %s", w.Code, w.Body.String())
	}

	var resp map[string]any
	json.NewDecoder(w.Body).Decode(&resp)
	runtimes, ok := resp["runtimes"].([]any)
	if !ok || len(runtimes) == 0 {
		t.Fatalf("DaemonRegister: expected runtimes in response, got %v", resp)
	}

	// Clean up: deregister the runtime.
	rt := runtimes[0].(map[string]any)
	runtimeID := rt["id"].(string)
	testPool.Exec(context.Background(), `DELETE FROM agent_runtime WHERE id = $1`, runtimeID)
}

func TestDaemonRegister_WithDaemonToken_WorkspaceMismatch(t *testing.T) {
	if testHandler == nil {
		t.Skip("database not available")
	}

	w := httptest.NewRecorder()
	// Daemon token is for a different workspace than the request body.
	req := newDaemonTokenRequest("POST", "/api/daemon/register", map[string]any{
		"workspace_id": testWorkspaceID,
		"daemon_id":    "test-daemon-mdt",
		"device_name":  "test-device",
		"runtimes": []map[string]any{
			{"name": "test-runtime", "type": "claude", "version": "1.0.0", "status": "online"},
		},
	}, "00000000-0000-0000-0000-000000000000", "test-daemon-mdt")

	testHandler.DaemonRegister(w, req)
	if w.Code != http.StatusNotFound {
		t.Fatalf("DaemonRegister with mismatched workspace: expected 404, got %d: %s", w.Code, w.Body.String())
	}
}

func TestDaemonHeartbeat_WithDaemonToken_CrossWorkspace(t *testing.T) {
	if testHandler == nil {
		t.Skip("database not available")
	}

	// First, register a runtime using PAT (existing flow).
	w := httptest.NewRecorder()
	req := newRequest("POST", "/api/daemon/register", map[string]any{
		"workspace_id": testWorkspaceID,
		"daemon_id":    "test-daemon-heartbeat",
		"device_name":  "test-device",
		"runtimes": []map[string]any{
			{"name": "test-runtime-hb", "type": "claude", "version": "1.0.0", "status": "online"},
		},
	})
	testHandler.DaemonRegister(w, req)
	if w.Code != http.StatusOK {
		t.Fatalf("Setup: DaemonRegister failed: %d: %s", w.Code, w.Body.String())
	}
	var regResp map[string]any
	json.NewDecoder(w.Body).Decode(&regResp)
	runtimes := regResp["runtimes"].([]any)
	runtimeID := runtimes[0].(map[string]any)["id"].(string)
	defer testPool.Exec(context.Background(), `DELETE FROM agent_runtime WHERE id = $1`, runtimeID)

	// Try heartbeat with a daemon token from a DIFFERENT workspace — should fail.
	w = httptest.NewRecorder()
	req = newDaemonTokenRequest("POST", "/api/daemon/heartbeat", map[string]any{
		"runtime_id": runtimeID,
	}, "00000000-0000-0000-0000-000000000000", "attacker-daemon")

	testHandler.DaemonHeartbeat(w, req)
	if w.Code != http.StatusNotFound {
		t.Fatalf("DaemonHeartbeat with cross-workspace token: expected 404, got %d: %s", w.Code, w.Body.String())
	}
}

func TestGetTaskStatus_WithDaemonToken_CrossWorkspace(t *testing.T) {
	if testHandler == nil {
		t.Skip("database not available")
	}

	// Create a task in the test workspace.
	var issueID, taskID string
	err := testPool.QueryRow(context.Background(), `
		INSERT INTO issue (workspace_id, title, status, priority, creator_id, creator_type)
		VALUES ($1, 'daemon-auth-test-issue', 'todo', 'medium', $2, 'member')
		RETURNING id
	`, testWorkspaceID, testUserID).Scan(&issueID)
	if err != nil {
		t.Fatalf("setup: create issue: %v", err)
	}
	defer testPool.Exec(context.Background(), `DELETE FROM issue WHERE id = $1`, issueID)

	// Get an agent and runtime from the test workspace.
	var agentID, runtimeID string
	err = testPool.QueryRow(context.Background(), `
		SELECT a.id, a.runtime_id FROM agent a WHERE a.workspace_id = $1 LIMIT 1
	`, testWorkspaceID).Scan(&agentID, &runtimeID)
	if err != nil {
		t.Fatalf("setup: get agent: %v", err)
	}

	err = testPool.QueryRow(context.Background(), `
		INSERT INTO agent_task_queue (agent_id, issue_id, status, runtime_id)
		VALUES ($1, $2, 'queued', $3)
		RETURNING id
	`, agentID, issueID, runtimeID).Scan(&taskID)
	if err != nil {
		t.Fatalf("setup: create task: %v", err)
	}
	defer testPool.Exec(context.Background(), `DELETE FROM agent_task_queue WHERE id = $1`, taskID)

	// Try GetTaskStatus with a daemon token from a DIFFERENT workspace — should fail.
	w := httptest.NewRecorder()
	req := newDaemonTokenRequest("GET", "/api/daemon/tasks/"+taskID+"/status", nil,
		"00000000-0000-0000-0000-000000000000", "attacker-daemon")
	rctx := chi.NewRouteContext()
	rctx.URLParams.Add("taskId", taskID)
	req = req.WithContext(context.WithValue(req.Context(), chi.RouteCtxKey, rctx))

	testHandler.GetTaskStatus(w, req)
	if w.Code != http.StatusNotFound {
		t.Fatalf("GetTaskStatus with cross-workspace token: expected 404, got %d: %s", w.Code, w.Body.String())
	}

	// Same request with the CORRECT workspace should succeed.
	w = httptest.NewRecorder()
	req = newDaemonTokenRequest("GET", "/api/daemon/tasks/"+taskID+"/status", nil,
		testWorkspaceID, "legit-daemon")
	req = req.WithContext(context.WithValue(
		middleware.WithDaemonContext(req.Context(), testWorkspaceID, "legit-daemon"),
		chi.RouteCtxKey, rctx))

	testHandler.GetTaskStatus(w, req)
	if w.Code != http.StatusOK {
		t.Fatalf("GetTaskStatus with correct workspace token: expected 200, got %d: %s", w.Code, w.Body.String())
	}
}