package api

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

	"github.com/go-chi/chi/v5"
	"github.com/will/k8s-agent-dashboard/internal/claude"
)

// Integration-style smoke test for the Claude endpoints.
//
// This does NOT start a server process; it wires chi routes directly and calls
// them via httptest.
func TestClaudeRoutes_Smoke(t *testing.T) {
	tmp := t.TempDir()

	// Minimal filesystem layout expected by endpoints.
	mustMkdirAll(t, filepath.Join(tmp, "agents"))
	mustMkdirAll(t, filepath.Join(tmp, "skills"))
	mustMkdirAll(t, filepath.Join(tmp, "commands"))
	mustMkdirAll(t, filepath.Join(tmp, "state"))

	// Minimal stats-cache.json required by /stats, /summary, /debug/files.
	// Keep it tiny and deterministic.
	statsCache := `{
		"totalSessions": 1,
		"totalMessages": 1,
		"modelUsage": {
			"claude-test": {
				"inputTokens": 1,
				"outputTokens": 1,
				"cacheReadInputTokens": 0,
				"cacheCreationInputTokens": 0
			}
		}
	}`
	if err := os.WriteFile(filepath.Join(tmp, "stats-cache.json"), []byte(statsCache), 0o600); err != nil {
		t.Fatalf("write stats-cache.json: %v", err)
	}
	if err := os.WriteFile(filepath.Join(tmp, "history.jsonl"), []byte("{}\n"), 0o600); err != nil {
		t.Fatalf("write history.jsonl: %v", err)
	}
	if err := os.WriteFile(filepath.Join(tmp, "state", "component-registry.json"), []byte("{}"), 0o600); err != nil {
		t.Fatalf("write state/component-registry.json: %v", err)
	}

	loader := claude.NewLoader(tmp)

	r := chi.NewRouter()
	// Mirror the /api/claude routes from cmd/server/main.go.
	r.Route("/api", func(r chi.Router) {
		r.Route("/claude", func(r chi.Router) {
			r.Get("/health", GetClaudeHealth(loader))
			r.Get("/stats", GetClaudeStats(loader))
			r.Get("/summary", GetClaudeSummary(loader))
			r.Get("/inventory", GetClaudeInventory(loader))
			r.Get("/debug/files", GetClaudeDebugFiles(loader))
		})
	})

	for _, path := range []string{
		"/api/claude/health",
		"/api/claude/stats",
		"/api/claude/inventory",
		"/api/claude/debug/files",
		"/api/claude/summary",
	} {
		path := path

		req := httptest.NewRequest(http.MethodGet, path, nil)
		w := httptest.NewRecorder()
		r.ServeHTTP(w, req)

		if w.Code != http.StatusOK {
			t.Fatalf("GET %s status=%d body=%s", path, w.Code, w.Body.String())
		}
	}
}

func mustMkdirAll(t *testing.T, p string) {
	t.Helper()
	if err := os.MkdirAll(p, 0o755); err != nil {
		t.Fatalf("mkdir %s: %v", p, err)
	}
}