package poolapi

import (
	"context"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
	"time"

	"github.com/itworx/pulse/internal/auth"
	"github.com/itworx/pulse/internal/pool"
)

type provider struct{ snapshot pool.Snapshot }

func (p provider) Snapshot(context.Context) (pool.Snapshot, error) { return p.snapshot, nil }

func authenticatedRequest(method, path string) *http.Request {
	request := httptest.NewRequest(method, path, nil)
	return request.WithContext(auth.WithPrincipal(request.Context(), auth.Principal{Subject: "viewer", Role: auth.RoleViewer}))
}

func TestHandlerRequiresAuthenticationAndReturnsUnknown(t *testing.T) {
	unauthenticated := httptest.NewRecorder()
	Handler{}.ServeHTTP(unauthenticated, httptest.NewRequest(http.MethodGet, "/api/v1/pools", nil))
	if unauthenticated.Code != http.StatusUnauthorized {
		t.Fatalf("status=%d", unauthenticated.Code)
	}
	response := httptest.NewRecorder()
	Handler{}.ServeHTTP(response, authenticatedRequest(http.MethodGet, "/api/v1/pools"))
	if response.Code != http.StatusOK || !strings.Contains(response.Body.String(), `"state":"unknown"`) {
		t.Fatalf("status=%d body=%s", response.Code, response.Body.String())
	}
}

func TestHandlerReturnsListAndDetailAndRejectsMutations(t *testing.T) {
	snapshot := pool.Snapshot{ContractVersion: pool.ContractVersion, Source: pool.Source{ID: "fixture-pool", Type: "fixture", Freshness: pool.Fresh, State: pool.StateHealthy}, Pools: []pool.Pool{{ID: "cache", Name: "Cache", Filesystem: "btrfs", State: pool.StateDegraded}}, Total: 1, ObservedAt: time.Date(2026, 8, 1, 12, 0, 0, 0, time.UTC)}
	list := httptest.NewRecorder()
	Handler{Provider: provider{snapshot: snapshot}}.ServeHTTP(list, authenticatedRequest(http.MethodGet, "/api/v1/pools?limit=10"))
	if list.Code != http.StatusOK || !strings.Contains(list.Body.String(), `"id":"cache"`) {
		t.Fatalf("status=%d body=%s", list.Code, list.Body.String())
	}
	detail := httptest.NewRecorder()
	Handler{Provider: provider{snapshot: snapshot}}.ServeHTTP(detail, authenticatedRequest(http.MethodGet, "/api/v1/pools/cache"))
	if detail.Code != http.StatusOK || !strings.Contains(detail.Body.String(), `"name":"Cache"`) {
		t.Fatalf("status=%d body=%s", detail.Code, detail.Body.String())
	}
	mutation := httptest.NewRecorder()
	Handler{}.ServeHTTP(mutation, httptest.NewRequest(http.MethodPost, "/api/v1/pools", nil))
	if mutation.Code != http.StatusNotFound {
		t.Fatalf("mutation status=%d", mutation.Code)
	}
}