package server

import (
	"context"
	"encoding/json"
	"log/slog"
	"net/http"
	"net/http/httptest"
	"path/filepath"
	"testing"

	"gitea.lab.audasmedia.com.au/sam/email_agent/internal/config"
	"gitea.lab.audasmedia.com.au/sam/email_agent/internal/store"
)

func newTestServer(t *testing.T) *Server {
	t.Helper()
	cfg := &config.Config{
		Env:      "test",
		Addr:     ":0",
		DBPath:   filepath.Join(t.TempDir(), "email_agent.db"),
		LogLevel: "error",
	}
	st, err := store.Open(context.Background(), cfg.DBPath)
	if err != nil {
		t.Fatalf("store.Open() error = %v", err)
	}
	t.Cleanup(func() { _ = st.Close() })

	srv, err := New(cfg, st, slog.New(slog.DiscardHandler))
	if err != nil {
		t.Fatalf("New() error = %v", err)
	}
	return srv
}

func TestHealthOK(t *testing.T) {
	srv := newTestServer(t)
	req := httptest.NewRequest(http.MethodGet, "/health", nil)
	rec := httptest.NewRecorder()

	srv.Handler().ServeHTTP(rec, req)

	if rec.Code != http.StatusOK {
		t.Fatalf("status = %d, want %d", rec.Code, http.StatusOK)
	}
	var body map[string]any
	if err := json.Unmarshal(rec.Body.Bytes(), &body); err != nil {
		t.Fatalf("decode body: %v", err)
	}
	if body["status"] != "ok" {
		t.Errorf("status field = %v, want ok", body["status"])
	}
}

func TestReadyz(t *testing.T) {
	srv := newTestServer(t)
	req := httptest.NewRequest(http.MethodGet, "/readyz", nil)
	rec := httptest.NewRecorder()

	srv.Handler().ServeHTTP(rec, req)

	if rec.Code != http.StatusOK {
		t.Fatalf("status = %d, want %d", rec.Code, http.StatusOK)
	}
}

func TestIndexRendersHTML(t *testing.T) {
	srv := newTestServer(t)
	req := httptest.NewRequest(http.MethodGet, "/", nil)
	rec := httptest.NewRecorder()

	srv.Handler().ServeHTTP(rec, req)

	if rec.Code != http.StatusOK {
		t.Fatalf("status = %d, want %d", rec.Code, http.StatusOK)
	}
	if ct := rec.Header().Get("Content-Type"); ct == "" {
		t.Error("Content-Type header is empty")
	}
}