package invoke

import (
	"io"
	"log/slog"
	"net/http"
	"path/filepath"
	"time"

	"git.oblat.lv/alex/triggerssmith/internal/config"
	"git.oblat.lv/alex/triggerssmith/internal/worker"
	"github.com/go-chi/chi/v5"
	"gorm.io/gorm"
)

type Function struct {
	ID           uint           `gorm:"primaryKey;autoIncrement"`
	FunctionName string         `gorm:"not null"`
	Version      string         `gorm:"not null"`
	Path         string         `gorm:"not null"`
	CreatedAt    time.Time      `gorm:"autoCreateTime"`
	DeletedAt    gorm.DeletedAt `gorm:"index"`
}

func InvokeHandler(cfg *config.Config) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		id := chi.URLParam(r, "function_id")
		version := chi.URLParam(r, "function_version")
		slog.Debug("executing a function", slog.String("id", id), slog.String("version", version))
		root := cfg.Functions.FunctionDir
		treeCfg, _ := worker.LoadTreeConfig(root)
		db, err := worker.OpenDB(treeCfg, root)
		if err != nil {
			slog.Error("Failed to open db", slog.String("err", err.Error()))
			w.WriteHeader(http.StatusInternalServerError)
			return
		}
		//f, _ := worker.FindFunction(db, "echo", "0.0.1-00130112025")
		f, err := worker.FindFunction(db, id, version)
		if err != nil {
			slog.Error("Failed to find function", slog.String("err", err.Error()))
			w.WriteHeader(http.StatusInternalServerError)
			return
		}
		fc, err := worker.LoadFunctionConfig(root, f.FunctionName, f.Path)
		if err != nil {
			slog.Error("Failed to load function config", slog.String("err", err.Error()))
			w.WriteHeader(http.StatusInternalServerError)
			return
		}

		input, _ := io.ReadAll(r.Body)
		output, err := worker.RunFunction(filepath.Join(root, f.FunctionName, f.Path, fc.Entry), fc, input)
		if err != nil {
			slog.Error("Failed to run function", slog.String("err", err.Error()))
			w.WriteHeader(http.StatusInternalServerError)
			return
		}
		slog.Debug("executing done", slog.Any("in", input), slog.Any("out", output))
		w.Write(output)
	}
}