package web

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

	"git.dern.ovh/infrastructure/caddy-opnsense-blocker/internal/model"
)

func TestHandlerServesOverviewAndManualActions(t *testing.T) {
	t.Parallel()

	app := &stubApp{}
	handler := NewHandler(app)

	recorder := httptest.NewRecorder()
	request := httptest.NewRequest(http.MethodGet, "/api/recent-ips?hours=24&limit=10", nil)
	handler.ServeHTTP(recorder, request)
	if recorder.Code != http.StatusOK {
		t.Fatalf("unexpected recent ip status: %d body=%s", recorder.Code, recorder.Body.String())
	}
	var recentIPs []model.RecentIPRow
	if err := json.Unmarshal(recorder.Body.Bytes(), &recentIPs); err != nil {
		t.Fatalf("decode recent ips payload: %v", err)
	}
	if len(recentIPs) != 1 || recentIPs[0].IP != "203.0.113.10" {
		t.Fatalf("unexpected recent ips payload: %+v", recentIPs)
	}

	recorder = httptest.NewRecorder()
	request = httptest.NewRequest(http.MethodGet, "/api/overview?hours=24&limit=10", nil)
	handler.ServeHTTP(recorder, request)
	if recorder.Code != http.StatusOK {
		t.Fatalf("unexpected overview status: %d", recorder.Code)
	}
	var overview model.Overview
	if err := json.Unmarshal(recorder.Body.Bytes(), &overview); err != nil {
		t.Fatalf("decode overview payload: %v", err)
	}
	if overview.TotalEvents != 1 || len(overview.RecentIPs) != 1 || len(overview.TopIPsByEvents) != 1 {
		t.Fatalf("unexpected overview payload: %+v", overview)
	}

	recorder = httptest.NewRecorder()
	request = httptest.NewRequest(http.MethodGet, "/api/overview?hours=24&limit=10&show_known_bots=false&show_allowed=false", nil)
	handler.ServeHTTP(recorder, request)
	if recorder.Code != http.StatusOK {
		t.Fatalf("unexpected filtered overview status: %d", recorder.Code)
	}
	if !app.lastOverviewOptions.ShowKnownBots || !app.lastOverviewOptions.ShowAllowed {
		t.Fatalf("overview should always use the unfiltered dashboard data: %+v", app.lastOverviewOptions)
	}

	recorder = httptest.NewRecorder()
	request = httptest.NewRequest(http.MethodGet, "/api/events?hours=24&limit=250&page=2&source=main&method=GET&status=4xx&state=review&bot_filter=known&sort_by=status&sort_dir=asc", nil)
	handler.ServeHTTP(recorder, request)
	if recorder.Code != http.StatusOK {
		t.Fatalf("unexpected filtered events status: %d", recorder.Code)
	}
	var eventPage model.EventPage
	if err := json.Unmarshal(recorder.Body.Bytes(), &eventPage); err != nil {
		t.Fatalf("decode event page payload: %v", err)
	}
	if eventPage.Page != 2 || !eventPage.HasPrev {
		t.Fatalf("unexpected event page payload: %+v", eventPage)
	}
	if app.lastEventOptions.Offset != 250 ||
		app.lastEventOptions.Source != "main" ||
		app.lastEventOptions.Method != "GET" ||
		app.lastEventOptions.StatusFilter != "4xx" ||
		app.lastEventOptions.State != string(model.IPStateReview) ||
		app.lastEventOptions.BotFilter != "known" ||
		app.lastEventOptions.SortBy != "status" ||
		app.lastEventOptions.SortDesc ||
		app.lastEventOptions.ReviewOnly {
		t.Fatalf("event filter options were not forwarded correctly: %+v", app.lastEventOptions)
	}

	recorder = httptest.NewRecorder()
	request = httptest.NewRequest(http.MethodPost, "/api/ips/203.0.113.10/block", strings.NewReader(`{"reason":"test reason","actor":"tester"}`))
	request.Header.Set("Content-Type", "application/json")
	handler.ServeHTTP(recorder, request)
	if recorder.Code != http.StatusOK {
		t.Fatalf("unexpected block status: %d body=%s", recorder.Code, recorder.Body.String())
	}
	if app.lastAction != "block:203.0.113.10:tester:test reason" {
		t.Fatalf("unexpected recorded action: %q", app.lastAction)
	}

	recorder = httptest.NewRecorder()
	request = httptest.NewRequest(http.MethodPost, "/api/ips/203.0.113.10/investigate", strings.NewReader(`{"actor":"tester"}`))
	request.Header.Set("Content-Type", "application/json")
	handler.ServeHTTP(recorder, request)
	if recorder.Code != http.StatusOK {
		t.Fatalf("unexpected investigate status: %d body=%s", recorder.Code, recorder.Body.String())
	}

	recorder = httptest.NewRecorder()
	request = httptest.NewRequest(http.MethodGet, "/", nil)
	handler.ServeHTTP(recorder, request)
	if recorder.Code != http.StatusOK {
		t.Fatalf("unexpected overview page status: %d", recorder.Code)
	}
	if !strings.Contains(recorder.Body.String(), "Local-only review and enforcement console") {
		t.Fatalf("overview page did not render expected content")
	}
	if strings.Contains(recorder.Body.String(), "Show known bots") {
		t.Fatalf("overview page should no longer expose the known bots toggle")
	}
	if !strings.Contains(recorder.Body.String(), "Requests Log") {
		t.Fatalf("overview page should link to the requests log")
	}
	if !strings.Contains(recorder.Body.String(), "Activity") {
		t.Fatalf("overview page should expose the activity chart")
	}
	if !strings.Contains(recorder.Body.String(), "Methods") {
		t.Fatalf("overview page should expose the methods chart")
	}
	if !strings.Contains(recorder.Body.String(), "Bots") {
		t.Fatalf("overview page should expose the bots chart")
	}
	if !strings.Contains(recorder.Body.String(), "Top bot IPs by events") {
		t.Fatalf("overview page should expose the top bot IPs by events block")
	}
	if !strings.Contains(recorder.Body.String(), "Top non-bot IPs by traffic") {
		t.Fatalf("overview page should expose the split top IP traffic block")
	}
	if !strings.Contains(recorder.Body.String(), "Top sources by events") {
		t.Fatalf("overview page should expose the top sources block")
	}
	if !strings.Contains(recorder.Body.String(), "Top URLs by events") {
		t.Fatalf("overview page should expose the top URLs block")
	}
	if !strings.Contains(recorder.Body.String(), "Loading…") {
		t.Fatalf("overview page should render stable loading placeholders")
	}
	if strings.Contains(recorder.Body.String(), "position: sticky") {
		t.Fatalf("overview page header should no longer be sticky")
	}
	if strings.Contains(recorder.Body.String(), "Review only") {
		t.Fatalf("overview page should not expose the review-only toggle anymore")
	}
	if strings.Contains(recorder.Body.String(), "Auto refresh") {
		t.Fatalf("overview page should not expose requests log controls")
	}

	recorder = httptest.NewRecorder()
	request = httptest.NewRequest(http.MethodGet, "/queries", nil)
	handler.ServeHTTP(recorder, request)
	if recorder.Code != http.StatusMovedPermanently {
		t.Fatalf("unexpected legacy query log redirect status: %d", recorder.Code)
	}
	if location := recorder.Header().Get("Location"); location != "/requests" {
		t.Fatalf("unexpected redirect location: %q", location)
	}

	recorder = httptest.NewRecorder()
	request = httptest.NewRequest(http.MethodGet, "/requests", nil)
	handler.ServeHTTP(recorder, request)
	if recorder.Code != http.StatusOK {
		t.Fatalf("unexpected requests log page status: %d", recorder.Code)
	}
	queryLogBody := recorder.Body.String()
	if !strings.Contains(queryLogBody, "Filters, sorting, and pagination") {
		t.Fatalf("requests log page should expose the collapsible controls panel")
	}
	if !strings.Contains(queryLogBody, "Rows per page") {
		t.Fatalf("requests log page should expose pagination settings")
	}
	if !strings.Contains(queryLogBody, "Request") {
		t.Fatalf("requests log page should render the request table")
	}
	if !strings.Contains(queryLogBody, "Auto refresh") {
		t.Fatalf("requests log page should expose the auto refresh toggle")
	}
	if !strings.Contains(queryLogBody, "onclick=\"applySort('status')\"") {
		t.Fatalf("requests log page should expose clickable sortable columns")
	}
	if !strings.Contains(queryLogBody, "Source") || !strings.Contains(queryLogBody, "Bots") || !strings.Contains(queryLogBody, "HTTP status") {
		t.Fatalf("requests log page should expose source, bot, and status filters")
	}
	if !strings.Contains(queryLogBody, "Previous") || !strings.Contains(queryLogBody, "Next") {
		t.Fatalf("requests log page should expose pagination controls")
	}

	recorder = httptest.NewRecorder()
	request = httptest.NewRequest(http.MethodGet, "/ips/203.0.113.10", nil)
	handler.ServeHTTP(recorder, request)
	if recorder.Code != http.StatusOK {
		t.Fatalf("unexpected ip details page status: %d", recorder.Code)
	}
	body := recorder.Body.String()
	if !strings.Contains(body, `data-ip="203.0.113.10"`) {
		t.Fatalf("ip details page did not expose expected data-ip attribute: %s", body)
	}
	if strings.Contains(body, `const ip = "\"203.0.113.10\"";`) {
		t.Fatalf("ip details page still renders a doubly quoted IP")
	}
	if strings.Contains(body, `refresh().then(() => investigate());`) {
		t.Fatalf("ip details page should not auto-refresh investigation on load")
	}
	if strings.Contains(body, "position: sticky") {
		t.Fatalf("ip details page header should no longer be sticky")
	}
	investigationIndex := strings.Index(body, "<h2>Investigation</h2>")
	decisionsIndex := strings.Index(body, "<h2>Decisions</h2>")
	requestsIndex := strings.Index(body, "<h2>Requests from this IP</h2>")
	if investigationIndex == -1 || decisionsIndex == -1 || requestsIndex == -1 {
		t.Fatalf("ip details page is missing expected sections")
	}
	if !(investigationIndex < decisionsIndex && decisionsIndex < requestsIndex) {
		t.Fatalf("expected Decisions block right after Investigation block")
	}
}

type stubApp struct {
	lastAction          string
	lastOverviewOptions model.OverviewOptions
	lastEventOptions    model.EventListOptions
}

func (s *stubApp) GetOverview(_ context.Context, _ time.Time, _ int, options model.OverviewOptions) (model.Overview, error) {
	s.lastOverviewOptions = options
	now := time.Now().UTC()
	return model.Overview{
		TotalEvents: 1,
		TotalIPs:    1,
		BlockedIPs:  1,
		ActivityBuckets: []model.ActivityBucket{{
			BucketStart: now.Add(-10 * time.Minute),
			TotalEvents: 1,
			Sources: []model.ActivitySourceCount{{
				SourceName: "main",
				Events:     1,
			}},
		}},
		Methods: []model.MethodBreakdownRow{{Method: "GET", Events: 1}},
		Bots:    []model.BotBreakdownRow{{Key: "non_bot", Label: "Non-bot", Events: 1}},
		TopIPsByEvents: []model.TopIPRow{{
			IP:           "203.0.113.10",
			Events:       3,
			TrafficBytes: 4096,
			LastSeenAt:   now,
			Bot:          &model.BotMatch{Name: "Googlebot", ProviderID: "google_official", Verified: true},
		}},
		TopBotIPsByEvents: []model.TopIPRow{{
			IP:           "203.0.113.10",
			Events:       3,
			TrafficBytes: 4096,
			LastSeenAt:   now,
			Bot:          &model.BotMatch{Name: "Googlebot", ProviderID: "google_official", Verified: true},
		}},
		TopNonBotIPsByEvents: []model.TopIPRow{{
			IP:           "198.51.100.20",
			Events:       2,
			TrafficBytes: 2048,
			LastSeenAt:   now,
		}},
		TopIPsByTraffic: []model.TopIPRow{{
			IP:           "203.0.113.10",
			Events:       3,
			TrafficBytes: 4096,
			LastSeenAt:   now,
			Bot:          &model.BotMatch{Name: "Googlebot", ProviderID: "google_official", Verified: true},
		}},
		TopBotIPsByTraffic: []model.TopIPRow{{
			IP:           "203.0.113.10",
			Events:       3,
			TrafficBytes: 4096,
			LastSeenAt:   now,
			Bot:          &model.BotMatch{Name: "Googlebot", ProviderID: "google_official", Verified: true},
		}},
		TopNonBotIPsByTraffic: []model.TopIPRow{{
			IP:           "198.51.100.20",
			Events:       2,
			TrafficBytes: 2048,
			LastSeenAt:   now,
		}},
		TopSources: []model.TopSourceRow{{
			SourceName:   "main",
			Events:       3,
			TrafficBytes: 4096,
			LastSeenAt:   now,
		}},
		TopURLs: []model.TopURLRow{{
			Host:         "example.test",
			URI:          "/wp-login.php",
			Events:       3,
			TrafficBytes: 4096,
			LastSeenAt:   now,
		}},
		RecentIPs: []model.IPState{{
			IP:             "203.0.113.10",
			State:          model.IPStateBlocked,
			ManualOverride: model.ManualOverrideNone,
			TotalEvents:    1,
			LastSeenAt:     now,
		}},
		RecentEvents: []model.Event{{
			ID:             1,
			SourceName:     "main",
			ClientIP:       "203.0.113.10",
			OccurredAt:     now,
			Method:         http.MethodGet,
			URI:            "/wp-login.php",
			Host:           "example.test",
			Status:         http.StatusNotFound,
			Decision:       model.DecisionActionBlock,
			CurrentState:   model.IPStateBlocked,
			DecisionReason: "php_path",
			Actions:        model.ActionAvailability{CanUnblock: true},
			Bot:            &model.BotMatch{Name: "Googlebot", ProviderID: "google_official", Verified: true},
		}},
	}, nil
}

func (s *stubApp) ListEvents(ctx context.Context, _ time.Time, limit int, options model.EventListOptions) ([]model.Event, error) {
	s.lastEventOptions = options
	overview, _ := s.GetOverview(ctx, time.Time{}, limit, model.OverviewOptions{ShowKnownBots: true, ShowAllowed: true})
	items := overview.RecentEvents
	if limit > 1 {
		items = append(items, model.Event{
			ID:           2,
			SourceName:   "main",
			ClientIP:     "198.51.100.20",
			OccurredAt:   time.Now().UTC().Add(-time.Minute),
			Method:       http.MethodPost,
			URI:          "/xmlrpc.php",
			Host:         "example.test",
			Status:       http.StatusNotFound,
			CurrentState: model.IPStateReview,
			Actions:      model.ActionAvailability{CanBlock: true},
		})
	}
	return items, nil
}

func (s *stubApp) ListIPs(ctx context.Context, limit int, state string) ([]model.IPState, error) {
	overview, _ := s.GetOverview(ctx, time.Time{}, limit, model.OverviewOptions{ShowKnownBots: true, ShowAllowed: true})
	return overview.RecentIPs, nil
}

func (s *stubApp) ListRecentIPs(ctx context.Context, since time.Time, limit int) ([]model.RecentIPRow, error) {
	_ = ctx
	_ = since
	_ = limit
	now := time.Now().UTC()
	return []model.RecentIPRow{{
		IP:         "203.0.113.10",
		SourceName: "main",
		State:      model.IPStateBlocked,
		Events:     3,
		LastSeenAt: now,
		Reason:     "php_path",
		Actions:    model.ActionAvailability{CanUnblock: true},
	}}, nil
}

func (s *stubApp) GetIPDetails(context.Context, string) (model.IPDetails, error) {
	now := time.Now().UTC()
	return model.IPDetails{
		State: model.IPState{
			IP:             "203.0.113.10",
			State:          model.IPStateBlocked,
			ManualOverride: model.ManualOverrideNone,
			TotalEvents:    1,
			LastSeenAt:     now,
		},
		RecentEvents:   []model.Event{{ID: 1, ClientIP: "203.0.113.10", OccurredAt: now, Decision: model.DecisionActionBlock}},
		Decisions:      []model.DecisionRecord{{ID: 1, IP: "203.0.113.10", Action: model.DecisionActionBlock, CreatedAt: now}},
		BackendActions: []model.OPNsenseAction{{ID: 1, IP: "203.0.113.10", Action: "block", Result: "added", CreatedAt: now}},
		OPNsense:       model.OPNsenseStatus{Configured: true, Present: true, CheckedAt: now},
		Actions:        model.ActionAvailability{CanUnblock: true},
		Investigation:  &model.IPInvestigation{IP: "203.0.113.10", UpdatedAt: now},
	}, nil
}

func (s *stubApp) InvestigateIP(context.Context, string) (model.IPDetails, error) {
	return s.GetIPDetails(context.Background(), "203.0.113.10")
}

func (s *stubApp) ForceBlock(_ context.Context, ip string, actor string, reason string) error {
	s.lastAction = "block:" + ip + ":" + actor + ":" + reason
	return nil
}

func (s *stubApp) ForceAllow(_ context.Context, ip string, actor string, reason string) error {
	s.lastAction = "allow:" + ip + ":" + actor + ":" + reason
	return nil
}

func (s *stubApp) ClearOverride(_ context.Context, ip string, actor string, reason string) error {
	s.lastAction = "reset:" + ip + ":" + actor + ":" + reason
	return nil
}