package service

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

	"github.com/alicebob/miniredis/v2"
	"github.com/ez-api/ez-api/internal/model"
	"github.com/redis/go-redis/v9"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
)

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

	dsn := fmt.Sprintf("file:%s?mode=memory&cache=shared", t.Name())
	db, err := gorm.Open(sqlite.Open(dsn), &gorm.Config{})
	if err != nil {
		t.Fatalf("open sqlite: %v", err)
	}
	if err := db.AutoMigrate(&model.Provider{}, &model.Binding{}, &model.Model{}); err != nil {
		t.Fatalf("migrate: %v", err)
	}

	const latestSHA = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path != "/repos/sst/models.dev/commits/dev" {
			http.NotFound(w, r)
			return
		}
		w.Header().Set("Content-Type", "application/json")
		_, _ = w.Write([]byte(`{"sha":"` + latestSHA + `"}`))
	}))
	defer srv.Close()

	mr := miniredis.RunT(t)
	rdb := redis.NewClient(&redis.Options{Addr: mr.Addr()})

	// Prefix-matching should treat short current as up-to-date.
	mr.HSet("meta:models_meta", "version", "aaaaaaaa")
	mr.HSet("meta:models_meta", "upstream_ref", "dev")

	svc := NewModelRegistryService(db, rdb, ModelRegistryConfig{
		Enabled:             true,
		RefreshEvery:        time.Hour,
		ModelsDevAPIBaseURL: srv.URL,
		ModelsDevRef:        "dev",
		Timeout:             5 * time.Second,
	})

	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
	defer cancel()

	out, err := svc.Check(ctx, "")
	if err != nil {
		t.Fatalf("check: %v", err)
	}
	if out.NeedsRefresh {
		t.Fatalf("expected needs_refresh=false, got true (current=%q latest=%q)", out.CurrentVersion, out.LatestVersion)
	}

	mr.HSet("meta:models_meta", "version", "bbbbbbbb")
	out, err = svc.Check(ctx, "dev")
	if err != nil {
		t.Fatalf("check2: %v", err)
	}
	if !out.NeedsRefresh {
		t.Fatalf("expected needs_refresh=true, got false (current=%q latest=%q)", out.CurrentVersion, out.LatestVersion)
	}
}