package main

import (
	"context"
	"log"
	"net/http"
	"os"

	"github.com/flatrender/render-svc/internal/db"
	"github.com/flatrender/render-svc/internal/handlers"
	"github.com/flatrender/render-svc/internal/middleware"
	"github.com/flatrender/render-svc/internal/notifier"
	"github.com/gin-gonic/gin"
	"github.com/jackc/pgx/v5/pgxpool"
	"github.com/minio/minio-go/v7"
	"github.com/minio/minio-go/v7/pkg/credentials"
)

func getEnv(key, fallback string) string {
	if v := os.Getenv(key); v != "" {
		return v
	}
	return fallback
}

func main() {
	// ── Config ────────────────────────────────────────────────────────────────
	dbURL := getEnv("DATABASE_URL", "postgres://postgres:postgres@localhost:5432/flatrender?search_path=render,public")
	jwtSecret := getEnv("JWT_SECRET", "change-me")
	nodeSecret := getEnv("NODE_HMAC_SECRET", "node-secret")
	minioEndpoint := getEnv("MINIO_ENDPOINT", "localhost:9000")
	minioAccessKey := getEnv("MINIO_ACCESS_KEY", "minioadmin")
	minioSecretKey := getEnv("MINIO_SECRET_KEY", "minioadmin")
	minioUseSSL := getEnv("MINIO_USE_SSL", "false") == "true"
	minioBucket         := getEnv("MINIO_BUCKET",          "flatrender-exports")
	minioTemplatesBucket := getEnv("MINIO_TEMPLATES_BUCKET", "flatrender-templates")
	notificationURL := getEnv("NOTIFICATION_URL",   "http://localhost:8080")
	serviceToken    := getEnv("SERVICE_TOKEN",       "internal-service-secret")
	port            := getEnv("PORT",                "8080")

	// ── Database ──────────────────────────────────────────────────────────────
	pool, err := pgxpool.New(context.Background(), dbURL)
	if err != nil {
		log.Fatalf("connect db: %v", err)
	}
	defer pool.Close()
	if err := pool.Ping(context.Background()); err != nil {
		log.Fatalf("ping db: %v", err)
	}

	// ── MinIO ──────────────────────────────────────────────────────────────────
	mc, err := minio.New(minioEndpoint, &minio.Options{
		Creds:  credentials.NewStaticV4(minioAccessKey, minioSecretKey, ""),
		Secure: minioUseSSL,
	})
	if err != nil {
		log.Fatalf("minio client: %v", err)
	}

	// ── Store + handlers ──────────────────────────────────────────────────────
	store    := db.NewStore(pool)
	notifyClient := notifier.New(notificationURL, serviceToken)
	renderH  := handlers.NewRenderHandler(store)
	snapH    := handlers.NewSnapshotHandler(store)
	exportH  := handlers.NewExportHandler(store, mc, minioBucket)
	nodeH    := handlers.NewNodeHandler(store)
	internalH := handlers.NewInternalHandler(store, notifyClient, mc, minioTemplatesBucket, minioBucket)

	// ── Router ────────────────────────────────────────────────────────────────
	r := gin.Default()

	r.GET("/health", func(c *gin.Context) {
		if err := pool.Ping(c.Request.Context()); err != nil {
			c.JSON(http.StatusServiceUnavailable, gin.H{"status": "down", "error": err.Error()})
			return
		}
		c.JSON(http.StatusOK, gin.H{"status": "ok"})
	})

	auth := middleware.JWTAuth(jwtSecret)
	admin := middleware.RequireAdmin()
	nodeAuth := middleware.NodeHMAC(nodeSecret)

	v1 := r.Group("/v1")

	// ── Render jobs ───────────────────────────────────────────────────────────
	renders := v1.Group("/renders", auth)
	{
		renders.GET("", renderH.List)
		renders.POST("", renderH.Create)
		renders.GET("/:job_id", renderH.Get)
		renders.POST("/:job_id/cancel", renderH.Cancel)
		renders.POST("/:job_id/retry", renderH.Retry)
		renders.GET("/:job_id/progress", renderH.Progress)
		renders.GET("/:job_id/logs", renderH.Logs)
	}

	// ── Snapshots ─────────────────────────────────────────────────────────────
	snaps := v1.Group("/snapshots", auth)
	{
		snaps.POST("", snapH.Create)
		snaps.GET("/:snapshot_id", snapH.Get)
	}

	// ── Exports ───────────────────────────────────────────────────────────────
	exports := v1.Group("/exports", auth)
	{
		exports.GET("", exportH.List)
		exports.GET("/:export_id", exportH.Get)
		exports.DELETE("/:export_id", exportH.Delete)
		exports.POST("/:export_id/extend", exportH.Extend)
		exports.GET("/:export_id/download-url", exportH.DownloadURL)
	}

	// ── Nodes (admin) ─────────────────────────────────────────────────────────
	nodes := v1.Group("/nodes", auth, admin)
	{
		nodes.GET("", nodeH.List)
		nodes.POST("", nodeH.Create)
		nodes.GET("/:node_id", nodeH.Get)
		nodes.PATCH("/:node_id", nodeH.Patch)
		nodes.POST("/:node_id/restart", nodeH.Restart)
		nodes.POST("/:node_id/release", nodeH.Release)
		nodes.POST("/:node_id/close-ae", nodeH.CloseAE)
		nodes.GET("/:node_id/health", nodeH.Health)
		nodes.GET("/:node_id/health/history", nodeH.HealthHistory)
		nodes.GET("/:node_id/crashes", nodeH.Crashes)
	}

	// ── Node updates (admin) ──────────────────────────────────────────────────
	v1.GET("/node-updates", auth, admin, nodeH.ListUpdates)
	v1.POST("/node-updates/:update_id/rollout", auth, admin, nodeH.Rollout)

	// ── Internal (node agents only — HMAC auth) ───────────────────────────────
	internal := v1.Group("/internal", nodeAuth)
	{
		internal.POST("/nodes/:node_id/heartbeat", internalH.Heartbeat)
		internal.POST("/nodes/:node_id/online", internalH.Online)
		internal.POST("/nodes/:node_id/cache-update", internalH.CacheUpdate)
		internal.POST("/render/jobs/claim", internalH.Claim)
		internal.POST("/render/jobs/:job_id/preview", internalH.Preview)
		internal.POST("/render/jobs/:job_id/output-upload-url", internalH.OutputUploadURL)
		internal.POST("/render/jobs/:job_id/frames", internalH.FrameProgress)
		internal.POST("/render/jobs/:job_id/complete", internalH.Complete)
		internal.POST("/render/jobs/:job_id/fail", internalH.Fail)
		internal.POST("/render/jobs/:job_id/crash", internalH.Crash)
		internal.POST("/render/jobs/:job_id/replica-ready", internalH.ReplicaReady)
	}

	log.Printf("render-svc listening on :%s", port)
	if err := r.Run(":" + port); err != nil {
		log.Fatalf("server: %v", err)
	}
}