package main

import (
	"flag"
	"fmt"
	"log"
	"os"
	"path/filepath"
	"slices"

	"src.opensuse.org/autogits/common"
)

type ConfigRepos struct {
	prjgit string
	branch string // "" == default branch
}
var configuredRepos map[string]ConfigRepos

func processRepositoryAction(h *common.RequestHandler) error {
	action := h.Request.Data.(*common.RepositoryWebhookEvent)

	if action.Repository.Name == common.DefaultGitPrj {
		h.StdLogger.Printf("repository event %s for %s. Ignoring\n", common.DefaultGitPrj, action.Action)
		return nil
	}

	h.CreateRepositoryIfNotExist(*action.Organization, h.PrjGit)
	h.GitExec("", "clone", "--depth", "1", action.PrjGit, h.PrjGit)

	switch action.Action {
	case "created":
		h.GitExec(common.DefaultGitPrj, "submodule", "--quiet", "add", "--depth", "1", action.Repository.Clone_Url)
		h.GitExec(common.DefaultGitPrj, "commit", "-m", "Automatic package inclusion")
		h.GitExec(common.DefaultGitPrj, "push")
	case "deleted":
		if stat, err := os.Stat(filepath.Join(h.GitPath, common.DefaultGitPrj, action.Repository.Name)); err != nil || !stat.IsDir() {
			h.StdLogger.Printf("delete event for %s -- not in project. Ignoring\n", action.Repository.Name)
			return nil
		}
		h.GitExec(common.DefaultGitPrj, "rm", action.Repository.Name)
		h.GitExec(common.DefaultGitPrj, "commit", "-m", "Automatic package removal")
		h.GitExec(common.DefaultGitPrj, "push")
	default:
		return fmt.Errorf("%s: %s", "Unknown action type", action.Action)
	}

	return nil
}

func processPushAction(h *common.RequestHandler) error {
	action := h.Request.Data.(*common.PushWebhookEvent)

	if action.Repository.Name == common.DefaultGitPrj {
		h.StdLogger.Printf("push to %s -- ignoringi\n", common.DefaultGitPrj)
		return nil
	}

	h.GitExec("", "clone", "--depth", "1", h.PrjGit, common.DefaultGitPrj)
	if stat, err := os.Stat(filepath.Join(h.GitPath, common.DefaultGitPrj, action.Repository.Name)); err != nil || !stat.IsDir() {
		h.StdLogger.Printf("Pushed to package that is not part of the project. Ignoring. : %v\n", err)
		return nil
	}
	h.GitExec(common.DefaultGitPrj, "submodule", "update", "--init", "--depth", "1", "--checkout", action.Repository.Name)
	id, _ := h.GitBranchHead(filepath.Join(common.DefaultGitPrj, action.Repository.Name), action.Repository.Default_Branch)
	for _, commitId := range action.Commits {
		if commitId.Id == id {
			h.GitExec(filepath.Join(common.DefaultGitPrj, action.Repository.Name), "fetch", "--depth", "1", "origin", id)
			h.GitExec(filepath.Join(common.DefaultGitPrj, action.Repository.Name), "checkout", id)
			h.GitExec(common.DefaultGitPrj, "commit", "-a", "-m", "Automatic update via push")
			h.GitExec(common.DefaultGitPrj, "push")
			return nil
		}
	}

	h.StdLogger.Println("push of refs not on the main branch. ignoring.")
	return nil
}

var debugMode bool

func main() {
	workflowConfig := flag.String("config", "", "Repository and workflow definition file")
	rabbitUrl := flag.String("url", "amqps://rabbit.opensuse.org", "URL for RabbitMQ instance")
	flag.BoolVar(&debugMode, "debug", false, "Extra debugging information")
	flag.Parse()

	if len(*workflowConfig) == 0 {
		log.Fatalln("No configuratio file specified. Aborting")
	}

	configs, err := common.ReadWorkflowConfigsFile(*workflowConfig)
	if err != nil {
		log.Fatalf("Error reading config file.  err: %v", err)
	}

	configuredRepos = make(map[string]ConfigRepos)
	orgs := make([]string, 0, 10)
	for _, c := range configs {
		if slices.Contains(c.Workflows, "push") {
			if debugMode {
			log.Printf("  + adding org: '%s', branch: '%s', prjgit: '%s'\n", c.Organization, c.Branch, c.GitProjectName)
			}
			configuredRepos[c.Organization] = ConfigRepos{
				prjgit: c.GitProjectName,
				branch: c.Branch,
			}
			orgs = append(orgs, c.Organization)
		}
	}

	var defs common.ListenDefinitions

	defs.GitAuthor = "GiteaBot - AutoDevel"
	defs.RabbitURL = *rabbitUrl

	defs.Handlers = make(map[string]common.RequestProcessor)
	defs.Handlers[common.RequestType_Push] = processPushAction
	defs.Handlers[common.RequestType_Repository] = processRepositoryAction

	if err := common.RequireGiteaSecretToken(); err != nil {
		log.Fatal(err)
	}
	if err := common.RequireRabbitSecrets(); err != nil {
		log.Fatal(err)
	}
	log.Fatal(common.ProcessRabbitMQEvents(defs, orgs))
}