package alert_test

import (
	"os"
	"strings"
	"testing"

	"github.com/wangjia/pangolin/server/internal/alert"
)

// allEventTypes lists every EventType constant for completeness checks.
var allEventTypes = []alert.EventType{
	alert.EventTypeBlockConfirmed,
	alert.EventTypeReplenishFailed,
	alert.EventTypeWatermarkLow,
	alert.EventTypeBreakerTripped,
	alert.EventTypeProbeAgentLost,
	alert.EventTypeHeartbeatMissing,
	alert.EventTypeFault,
}

// expectedAnchors maps each EventType to the <a id="…"> expected in the runbook.
var expectedAnchors = map[alert.EventType]string{
	alert.EventTypeBlockConfirmed:   "block-confirmed",
	alert.EventTypeReplenishFailed:  "replenish-failed",
	alert.EventTypeWatermarkLow:     "watermark-low",
	alert.EventTypeBreakerTripped:   "breaker-tripped",
	alert.EventTypeProbeAgentLost:   "probe-agent-lost",
	alert.EventTypeHeartbeatMissing: "heartbeat-missing",
	alert.EventTypeFault:            "node-fault",
}

// TestRunbookAnchorsInCode verifies that every EventType produces an Event
// whose RunbookAnchor matches the expected anchor.
func TestRunbookAnchorsInCode(t *testing.T) {
	for _, et := range allEventTypes {
		e := alert.NewEvent(et, "node-x", nil)
		wantAnchor := "#" + expectedAnchors[et]
		if e.RunbookAnchor != wantAnchor {
			t.Errorf("EventType %q: RunbookAnchor = %q; want %q",
				et, e.RunbookAnchor, wantAnchor)
		}
	}
}

// TestRunbookFileContainsAllAnchors verifies that docs/runbook-scheduler.md
// contains an <a id="…"> tag for every event type.
//
// The test is skipped when the file does not exist yet (so it never blocks CI
// while the runbook is being drafted) and fails once the file is present but
// an anchor is missing.
func TestRunbookFileContainsAllAnchors(t *testing.T) {
	// Navigate up from server/internal/alert to the repo root, then to docs/.
	// Go test sets cwd to the package directory (server/internal/alert/),
	// so three levels up reaches the worktree root (where docs/ lives).
	runbookPath := "../../../docs/runbook-scheduler.md"

	data, err := os.ReadFile(runbookPath)
	if os.IsNotExist(err) {
		t.Skip("docs/runbook-scheduler.md not found; skipping anchor check")
	}
	if err != nil {
		t.Fatalf("read runbook: %v", err)
	}
	content := string(data)

	for et, anchor := range expectedAnchors {
		tag := `id="` + anchor + `"`
		if !strings.Contains(content, tag) {
			t.Errorf("runbook missing anchor for EventType %q: expected <a %s>", et, tag)
		}
	}
}