package api_test

import (
	"context"
	"fmt"
	"net/http"
	"net/http/httptest"
	"path/filepath"
	"strings"
	"testing"
	"time"

	"github.com/go-chi/chi/v5"

	"vetting/internal/api"
	"vetting/internal/db"
	"vetting/internal/events"
	"vetting/internal/logs"
	"vetting/internal/model"
	"vetting/internal/orchestrator"
	"vetting/internal/store"
)

func setupPage(t *testing.T) (*api.UI, *store.Hosts, *store.Runs) {
	t.Helper()
	tmp := t.TempDir()
	conn, err := db.Open(filepath.Join(tmp, "vetting.db"))
	if err != nil {
		t.Fatalf("open db: %v", err)
	}
	t.Cleanup(func() { _ = conn.Close() })
	hosts := &store.Hosts{DB: conn}
	runs := &store.Runs{DB: conn}
	stages := &store.Stages{DB: conn}
	subSteps := &store.SubSteps{DB: conn}
	diffs := &store.SpecDiffs{DB: conn}
	arts := &store.Artifacts{DB: conn}
	hub := events.NewHub()
	logsHub, err := logs.NewHub(filepath.Join(tmp, "logs"), hub)
	if err != nil {
		t.Fatalf("logs hub: %v", err)
	}
	t.Cleanup(logsHub.Close)
	runner := &orchestrator.Runner{Runs: runs, Hosts: hosts, Stages: stages, EventHub: hub}
	tiles := &api.TileEnricher{Runs: runs, Artifacts: arts, SpecDiffs: diffs}
	ui := &api.UI{
		Hosts:     hosts,
		Runs:      runs,
		Stages:    stages,
		SubSteps:  subSteps,
		SpecDiffs: diffs,
		Artifacts: arts,
		EventHub:  hub,
		Logs:      logsHub,
		Runner:    runner,
		Tiles:     tiles,
	}
	return ui, hosts, runs
}

func hostReq(id int64) *http.Request {
	req := httptest.NewRequest(http.MethodGet, fmt.Sprintf("/hosts/%d", id), nil)
	rctx := chi.NewRouteContext()
	rctx.URLParams.Add("id", fmt.Sprintf("%d", id))
	return req.WithContext(context.WithValue(req.Context(), chi.RouteCtxKey, rctx))
}

// TestHostPage_RunsTableRendered: GET /hosts/{id} renders one <tr> per
// run with the compact stage-strip in each row. This is the operator's
// "what has happened here" view.
func TestHostPage_RunsTableRendered(t *testing.T) {
	ui, hosts, runs := setupPage(t)
	ctx := context.Background()
	id, err := hosts.Create(ctx, model.Host{
		Name:             "runs-table",
		MAC:              "aa:bb:cc:dd:ee:60",
		WoLBroadcastIP:   "10.0.0.255",
		WoLPort:          9,
		ExpectedSpecYAML: "memory:\n  total_gib: 16\n",
	})
	if err != nil {
		t.Fatalf("create host: %v", err)
	}
	// Two runs: older completed, newer still in flight.
	oldID, err := runs.Create(ctx, id, "old", false)
	if err != nil {
		t.Fatalf("create old: %v", err)
	}
	if err := ui.Stages.Seed(ctx, oldID); err != nil {
		t.Fatalf("seed old: %v", err)
	}
	time.Sleep(10 * time.Millisecond)
	newID, err := runs.Create(ctx, id, "new", false)
	if err != nil {
		t.Fatalf("create new: %v", err)
	}
	if err := ui.Stages.Seed(ctx, newID); err != nil {
		t.Fatalf("seed new: %v", err)
	}

	rr := httptest.NewRecorder()
	ui.HostPage(rr, hostReq(id))
	if rr.Code != http.StatusOK {
		t.Fatalf("status = %d, body = %q", rr.Code, rr.Body.String())
	}
	body := rr.Body.String()
	for _, runID := range []int64{oldID, newID} {
		wantRow := fmt.Sprintf(`id="runrow-%d"`, runID)
		if !strings.Contains(body, wantRow) {
			t.Fatalf("body missing %s:\n%s", wantRow, body)
		}
		wantLink := fmt.Sprintf(`href="/runs/%d"`, runID)
		if !strings.Contains(body, wantLink) {
			t.Fatalf("body missing run link %s", wantLink)
		}
	}
	if !strings.Contains(body, `class="stage-strip"`) {
		t.Fatalf("body missing stage-strip: %s", body)
	}
	if !strings.Contains(body, `class="runs-table"`) {
		t.Fatalf("body missing runs-table: %s", body)
	}
}

// TestHostPage_EmptyState: a never-run host renders the empty-state
// banner + a big Start vetting button instead of the runs table.
func TestHostPage_EmptyState(t *testing.T) {
	ui, hosts, _ := setupPage(t)
	id, err := hosts.Create(context.Background(), model.Host{
		Name:             "empty-host",
		MAC:              "aa:bb:cc:dd:ee:61",
		WoLBroadcastIP:   "10.0.0.255",
		WoLPort:          9,
		ExpectedSpecYAML: "memory:\n  total_gib: 8\n",
	})
	if err != nil {
		t.Fatalf("create host: %v", err)
	}
	rr := httptest.NewRecorder()
	ui.HostPage(rr, hostReq(id))
	if rr.Code != http.StatusOK {
		t.Fatalf("status = %d", rr.Code)
	}
	body := rr.Body.String()
	if !strings.Contains(body, `class="host-empty-state"`) {
		t.Fatalf("body missing empty-state: %s", body)
	}
	if strings.Contains(body, `class="runs-table"`) {
		t.Fatalf("empty-state should not emit runs-table: %s", body)
	}
	if !strings.Contains(body, "Start vetting") {
		t.Fatalf("empty-state should offer Start vetting: %s", body)
	}
}

// TestHostPage_InFlightBanner: a live (non-terminal) run renders the
// sticky in-flight banner pointing at /runs/{N}; the matching runs-table
// row gets the .runs-row-live highlight class.
func TestHostPage_InFlightBanner(t *testing.T) {
	ui, hosts, runs := setupPage(t)
	ctx := context.Background()
	id, err := hosts.Create(ctx, model.Host{
		Name:             "live-host",
		MAC:              "aa:bb:cc:dd:ee:62",
		WoLBroadcastIP:   "10.0.0.255",
		WoLPort:          9,
		ExpectedSpecYAML: "memory:\n  total_gib: 8\n",
	})
	if err != nil {
		t.Fatalf("create host: %v", err)
	}
	runID, err := runs.Create(ctx, id, "live", false)
	if err != nil {
		t.Fatalf("create run: %v", err)
	}
	// Queued is non-terminal — enough to trigger the banner.
	rr := httptest.NewRecorder()
	ui.HostPage(rr, hostReq(id))
	body := rr.Body.String()
	wantOpen := fmt.Sprintf(`href="/runs/%d"`, runID)
	if !strings.Contains(body, wantOpen) {
		t.Fatalf("body missing in-flight link %s", wantOpen)
	}
	if !strings.Contains(body, "in progress") {
		t.Fatalf("body missing in-flight banner text: %s", body)
	}
	if !strings.Contains(body, `runs-row-live`) {
		t.Fatalf("body missing runs-row-live highlight: %s", body)
	}
}

// TestHostPage_UnknownID: a host that doesn't exist returns 404 — a
// stale bookmark or typo shouldn't render anything.
func TestHostPage_UnknownID(t *testing.T) {
	ui, _, _ := setupPage(t)
	rr := httptest.NewRecorder()
	ui.HostPage(rr, hostReq(9999))
	if rr.Code != http.StatusNotFound {
		t.Fatalf("status = %d, want 404", rr.Code)
	}
}

// TestHostPage_BadID: a non-numeric path segment returns 400, not a
// mysterious 500.
func TestHostPage_BadID(t *testing.T) {
	ui, _, _ := setupPage(t)
	req := httptest.NewRequest(http.MethodGet, "/hosts/not-a-number", nil)
	rctx := chi.NewRouteContext()
	rctx.URLParams.Add("id", "not-a-number")
	req = req.WithContext(context.WithValue(req.Context(), chi.RouteCtxKey, rctx))
	rr := httptest.NewRecorder()
	ui.HostPage(rr, req)
	if rr.Code != http.StatusBadRequest {
		t.Fatalf("status = %d, want 400", rr.Code)
	}
}