package main

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

	"github.com/gin-gonic/gin"

	opsdomain "github.com/geo-platform/tenant-api/internal/ops/domain"
	internalscheduler "github.com/geo-platform/tenant-api/internal/scheduler"
)

func TestSchedulerHTTPAddrDefaultsToLoopback(t *testing.T) {
	if got := schedulerHTTPAddr("", 8081); got != "127.0.0.1:8081" {
		t.Fatalf("schedulerHTTPAddr() = %q, want 127.0.0.1:8081", got)
	}
	if got := schedulerHTTPAddr("0.0.0.0", 8081); got != "0.0.0.0:8081" {
		t.Fatalf("schedulerHTTPAddr() = %q, want 0.0.0.0:8081", got)
	}
}

func TestSchedulerMetricsAuthMiddleware(t *testing.T) {
	gin.SetMode(gin.TestMode)

	tests := []struct {
		name       string
		headerName string
		header     string
		wantStatus int
	}{
		{name: "missing token", wantStatus: http.StatusUnauthorized},
		{name: "bad bearer token", headerName: "Authorization", header: "Bearer bad", wantStatus: http.StatusUnauthorized},
		{name: "valid bearer token", headerName: "Authorization", header: "Bearer secret-token", wantStatus: http.StatusNoContent},
		{name: "valid internal token header", headerName: "X-Internal-Metrics-Token", header: "secret-token", wantStatus: http.StatusNoContent},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			router := gin.New()
			router.GET("/metrics", schedulerMetricsAuthMiddlewareWithToken(func() string { return "secret-token" }), func(c *gin.Context) {
				c.Status(http.StatusNoContent)
			})

			req := httptest.NewRequest(http.MethodGet, "/metrics", nil)
			if tt.headerName != "" {
				req.Header.Set(tt.headerName, tt.header)
			}
			rec := httptest.NewRecorder()

			router.ServeHTTP(rec, req)
			if rec.Code != tt.wantStatus {
				t.Fatalf("status = %d, want %d", rec.Code, tt.wantStatus)
			}
		})
	}
}

func TestMonitoringDailyRunOptionsIgnoresJobBatchSizeForDailyCollection(t *testing.T) {
	batchSize := 88
	got := monitoringDailyRunOptions(internalscheduler.JobRunContext{
		Job: &opsdomain.SchedulerJob{BatchSize: &batchSize},
		Config: map[string]any{
			"max_materialize_per_run":    999,
			"max_materialize_per_plan":   12,
			"max_materialize_per_brand":  4,
			"max_desktop_client_backlog": 6,
			"batch_size":                 77,
		},
	})

	if got.MaxDesktopDispatchPerRun != 0 {
		t.Fatalf("MaxDesktopDispatchPerRun = %d, want unlimited", got.MaxDesktopDispatchPerRun)
	}
	if got.MaxMaterializePerPlan != 0 || got.MaxMaterializePerBrand != 0 {
		t.Fatalf("legacy plan/brand throttles should be ignored: %#v", got)
	}
	if got.MaxMaterializePerRun != 0 {
		t.Fatalf("batch_size must not throttle daily materialization: %#v", got)
	}
	if got.MaxDesktopClientBacklog != 6 {
		t.Fatalf("MaxDesktopClientBacklog = %d, want 6", got.MaxDesktopClientBacklog)
	}
}

func TestGenerationStateCheckRunOptionsUsesOpsConfig(t *testing.T) {
	batchSize := 50
	got := generationStateCheckRunOptions(internalscheduler.JobRunContext{
		Job: &opsdomain.SchedulerJob{
			BatchSize:      &batchSize,
			TimeoutSeconds: 7,
		},
		Config: map[string]any{
			"lookback": "2h",
		},
	})

	if got.BatchSize != 50 {
		t.Fatalf("BatchSize = %d, want 50", got.BatchSize)
	}
	if got.Timeout != 7*time.Second {
		t.Fatalf("Timeout = %s, want 7s", got.Timeout)
	}
	if got.Lookback != 2*time.Hour {
		t.Fatalf("Lookback = %s, want 2h", got.Lookback)
	}
}

func TestStartSchedulerWorkerWaitsForRunToReturn(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	var wg sync.WaitGroup
	started := make(chan struct{})
	startSchedulerWorker(ctx, &wg, "test_worker", testSchedulerLogger{}, func(ctx context.Context) {
		close(started)
		<-ctx.Done()
	})

	select {
	case <-started:
	case <-time.After(time.Second):
		t.Fatal("worker did not start")
	}

	cancel()
	if ok := waitSchedulerWorkers(&wg, time.Second, testSchedulerLogger{}); !ok {
		t.Fatal("expected worker shutdown wait to complete")
	}
}

func TestWaitSchedulerWorkersTimesOut(t *testing.T) {
	var wg sync.WaitGroup
	wg.Add(1)
	defer wg.Done()

	if ok := waitSchedulerWorkers(&wg, time.Nanosecond, testSchedulerLogger{}); ok {
		t.Fatal("expected worker shutdown wait to time out")
	}
}

type testSchedulerLogger struct{}

func (testSchedulerLogger) Infof(string, ...interface{})  {}
func (testSchedulerLogger) Errorf(string, ...interface{}) {}