package httpserver

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

	"solopm.com/solopm-server/internal/config"
)

type stubPinger struct{ err error }

func (s stubPinger) Ping(ctx context.Context) error { return s.err }

func TestHealthzHandler(t *testing.T) {
	cfg := &config.Config{} // no MEILI_URL/SMTP_HOST set: both report "absent"

	t.Run("db ok", func(t *testing.T) {
		rec := httptest.NewRecorder()
		req := httptest.NewRequest(http.MethodGet, "/healthz", nil)

		healthzHandler(cfg, stubPinger{}, "test")(rec, req)

		if rec.Code != http.StatusOK {
			t.Fatalf("status = %d, want 200", rec.Code)
		}
		var body healthResponse
		if err := json.Unmarshal(rec.Body.Bytes(), &body); err != nil {
			t.Fatalf("unmarshal: %v", err)
		}
		if body.Status != "ok" || body.Database != "ok" {
			t.Fatalf("body = %+v, want status=ok database=ok", body)
		}
		if body.Meilisearch != "absent" || body.SMTP != "absent" {
			t.Fatalf("body = %+v, want meilisearch/smtp absent", body)
		}
	})

	t.Run("db unreachable", func(t *testing.T) {
		rec := httptest.NewRecorder()
		req := httptest.NewRequest(http.MethodGet, "/healthz", nil)

		healthzHandler(cfg, stubPinger{err: errors.New("boom")}, "test")(rec, req)

		if rec.Code != http.StatusServiceUnavailable {
			t.Fatalf("status = %d, want 503", rec.Code)
		}
		var body healthResponse
		if err := json.Unmarshal(rec.Body.Bytes(), &body); err != nil {
			t.Fatalf("unmarshal: %v", err)
		}
		if body.Status != "error" || body.Database != "unreachable" {
			t.Fatalf("body = %+v, want status=error database=unreachable", body)
		}
	})
}