package common

import (
	"encoding/json"
	"fmt"
	"log"
	"os"
)

type RequestType interface {
	GetAction() string
}

type Request struct {
	Type string
	Data RequestType
}

func ParseRequestJSON(reqType string, data []byte) (req *Request, err error) {
	req = &Request{
		Type: reqType,
	}

	switch reqType {
	case RequestType_CreateBrachTag, RequestType_DeleteBranchTag:
		req.Data = &CreateWebhookEvent{}
	case RequestType_Fork:
		req.Data = &ForkWebhookEvent{}
	case RequestType_Push:
		req.Data = &PushWebhookEvent{}
	case RequestType_Repository:
		req.Data = &RepositoryWebhookEvent{}
	case RequestType_Release:
		req.Data = &ReleaseWebhookEvent{}
	case RequestType_Issue:
		req.Data = &IssueWebhookEvent{}
	case RequestType_IssueAssign:
		req.Data = &IssueWebhookEvent{}
	case RequestType_IssueComment, RequestType_PRComment:
		req.Data = &IssueCommentWebhookEvent{}
	case RequestType_IssueLabel:
		req.Data = &IssueWebhookEvent{}
	case RequestType_IssueMilestone:
		req.Data = &IssueWebhookEvent{}
	case RequestType_PR:
		req.Data = &PullRequestWebhookEvent{}
	case RequestType_PRLabel:
		req.Data = &PullRequestWebhookEvent{}
	case RequestType_PRMilestone:
		req.Data = &PullRequestWebhookEvent{}
	case RequestType_PRAssign:
		req.Data = &PullRequestWebhookEvent{}
	case RequestType_PRReviewRequest:
		req.Data = &PullRequestWebhookEvent{}
	case RequestType_PRReviewAccepted, RequestType_PRReviewRejected:
		req.Data = &PullRequestWebhookEvent{}
	case RequestType_PRSync:
		req.Data = &PullRequestWebhookEvent{}
	case RequestType_Wiki:
		req.Data = &WikiWebhookEvent{}
	default:
		return nil, fmt.Errorf("Unknown webhook request type: %s", reqType)
	}

	if err := json.Unmarshal(data, req.Data); err != nil {
		return nil, err
	}
	return req, nil
}

type RequestHandler struct {
	Branch string
	PrjGit string

	StdLogger, ErrLogger *log.Logger
	Request              *Request
	Git                  *GitHandler
}

func (r *RequestHandler) WriteError() {
	r.ErrLogger.Println("internal error sent")
}

func CreateRequestHandler(git_author, name string) (*RequestHandler, error) {
	var h *RequestHandler = new(RequestHandler)

	h.StdLogger, h.ErrLogger = CreateStdoutLogger(os.Stdout, os.Stderr)

	var err error
	h.Git, err = CreateGitHandler(git_author, name)
	if err != nil {
		return nil, err
	}
	return h, nil
}