package main

import (
	"encoding/json"
	"fmt"
	"io"
	"os"
	"strings"
)

type Head struct {
	Ref  string
	Repo Repository
	Sha  string
}

type PullRequest struct {
	Id     int
	Url    string
	Number int
	State  string

	Base   Head
	Labels []string
	Head

	Repository
	User
}

type PullRequestAction struct {
	Action string
	Number int

	PullRequest
	Repository
	Sender User
}

func (h *RequestHandler) parsePullRequest(data io.ReadCloser) *PullRequestAction {
	if h.HasError() {
		return nil
	}

	var action PullRequestAction
	h.Error = json.NewDecoder(data).Decode(&action)

	if h.HasError() {
		h.LogError("Got error while parsing: %v", h.Error)
		return nil
	}

	repoIdx := strings.LastIndex(action.Repository.Ssh_Url, "/")
	if repoIdx == -1 || action.Repository.Ssh_Url[repoIdx+1:] != action.Repository.Name+".git" {
		h.LogError("Unexpected URL for SSH repository: '%s'", action.Repository.Name)
		return nil
	}
	h.PrjGit = action.Repository.Ssh_Url[:repoIdx+1] + DefaultGitPrj + ".git"
	h.data = &action

	// sanity checks on request

	return &action
}

func (h *RequestHandler) processCreatePullRequestAction() {
	action := h.Request.data.(PullRequestAction)

	action.PullRequest
}

func (h *RequestHandler) processUpdatePullRequestAction() {
	// 1. update gitprj
	// 2. re-request reviews, if needed
}

func (h *RequestHandler) processPullRequestAction() {
	if h.HasError() {
		return
	}

	action := h.Request.data.(PullRequestAction)
	switch action.Action {
	case "opened":
		h.processCreatePullRequestAction()
	default:
		h.Error = fmt.Errorf("Invalid PR action type: %s", action.Action)
		h.LogError("%#v", h.Error)
		return
	}
}