// Copyright 2014 The Go Authors.  All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

import (
	"strings"
	"testing"
)

func TestSubmitErrors(t *testing.T) {
	gt := newGitTest(t)
	defer gt.done()

	srv := newGerritServer(t)
	defer srv.done()

	t.Logf("> no commit")
	testMainDied(t, "submit")
	testPrintedStderr(t, "cannot submit: no changes pending")
	write(t, gt.client+"/file1", "")
	trun(t, gt.client, "git", "add", "file1")
	trun(t, gt.client, "git", "commit", "-m", "msg\n\nChange-Id: I123456789\n")

	t.Logf("> staged changes")
	write(t, gt.client+"/file1", "asdf")
	trun(t, gt.client, "git", "add", "file1")
	testMainDied(t, "submit")
	testPrintedStderr(t, "cannot submit: staged changes exist",
		"git status", "!git stash", "!git add", "git-codereview change")
	testNoStdout(t)

	t.Logf("> unstaged changes")
	write(t, gt.client+"/file1", "actual content")
	testMainDied(t, "submit")
	testPrintedStderr(t, "cannot submit: unstaged changes exist",
		"git status", "git stash", "git add", "git-codereview change")
	testNoStdout(t)
	testRan(t)
	trun(t, gt.client, "git", "add", "file1")
	trun(t, gt.client, "git", "commit", "--amend", "--no-edit")

	t.Logf("> not found")
	testMainDied(t, "submit")
	testPrintedStderr(t, "change not found on Gerrit server")

	const id = "I123456789"

	t.Logf("> malformed json")
	srv.setJSON(id, "XXX")
	testMainDied(t, "submit")
	testRan(t) // nothing
	testPrintedStderr(t, "malformed json response")

	t.Logf("> unexpected change status")
	srv.setJSON(id, `{"status": "UNEXPECTED"}`)
	testMainDied(t, "submit")
	testRan(t) // nothing
	testPrintedStderr(t, "cannot submit: unexpected Gerrit change status \"UNEXPECTED\"")

	t.Logf("> already merged")
	srv.setJSON(id, `{"status": "MERGED"}`)
	testMainDied(t, "submit")
	testRan(t) // nothing
	testPrintedStderr(t, "cannot submit: change already submitted, run 'git sync'")

	t.Logf("> abandoned")
	srv.setJSON(id, `{"status": "ABANDONED"}`)
	testMainDied(t, "submit")
	testRan(t) // nothing
	testPrintedStderr(t, "cannot submit: change abandoned")

	t.Logf("> missing approval")
	srv.setJSON(id, `{"status": "NEW", "labels": {"Code-Review": {}}}`)
	testMainDied(t, "submit")
	testRan(t) // nothing
	testPrintedStderr(t, "cannot submit: change missing Code-Review approval")

	t.Logf("> rejection")
	srv.setJSON(id, `{"status": "NEW", "labels": {"Code-Review": {"rejected": {}}}}`)
	testMainDied(t, "submit")
	testRan(t) // nothing
	testPrintedStderr(t, "cannot submit: change has Code-Review rejection")

	t.Logf("> unmergeable")
	srv.setJSON(id, `{"status": "NEW", "mergeable": false, "labels": {"Code-Review": {"approved": {}}}}`)
	testMainDied(t, "submit")
	testRan(t, "git push -q origin HEAD:refs/for/master")
	testPrintedStderr(t, "cannot submit: conflicting changes submitted, run 'git sync'")

	t.Logf("> submit with unexpected status")
	const newJSON = `{"status": "NEW", "mergeable": true, "labels": {"Code-Review": {"approved": {}}}}`
	srv.setJSON(id, newJSON)
	srv.setReply("/a/changes/proj~master~I123456789/submit", gerritReply{body: ")]}'\n" + newJSON})
	testMainDied(t, "submit")
	testRan(t, "git push -q origin HEAD:refs/for/master")
	testPrintedStderr(t, "submit error: unexpected post-submit Gerrit change status \"NEW\"")
}

func TestSubmitTimeout(t *testing.T) {
	gt := newGitTest(t)
	defer gt.done()
	srv := newGerritServer(t)
	defer srv.done()

	gt.work(t)

	setJSON := func(json string) {
		srv.setReply("/a/changes/proj~master~I123456789", gerritReply{body: ")]}'\n" + json})
	}

	t.Log("> submit with timeout")
	const submittedJSON = `{"status": "SUBMITTED", "mergeable": true, "labels": {"Code-Review": {"approved": {}}}}`
	setJSON(submittedJSON)
	srv.setReply("/a/changes/proj~master~I123456789/submit", gerritReply{body: ")]}'\n" + submittedJSON})
	testMainDied(t, "submit")
	testRan(t, "git push -q origin HEAD:refs/for/master")
	testPrintedStderr(t, "cannot submit: timed out waiting for change to be submitted by Gerrit")
}

func TestSubmit(t *testing.T) {
	gt := newGitTest(t)
	defer gt.done()
	srv := newGerritServer(t)
	defer srv.done()

	gt.work(t)
	trun(t, gt.client, "git", "tag", "-f", "work.mailed")
	clientHead := strings.TrimSpace(trun(t, gt.client, "git", "log", "-n", "1", "--format=format:%H"))

	write(t, gt.server+"/file", "another change")
	trun(t, gt.server, "git", "add", "file")
	trun(t, gt.server, "git", "commit", "-m", "conflict")
	serverHead := strings.TrimSpace(trun(t, gt.server, "git", "log", "-n", "1", "--format=format:%H"))

	t.Log("> submit")
	var (
		newJSON       = `{"status": "NEW", "mergeable": true, "current_revision": "` + clientHead + `", "labels": {"Code-Review": {"approved": {}}}}`
		submittedJSON = `{"status": "SUBMITTED", "mergeable": true, "current_revision": "` + clientHead + `", "labels": {"Code-Review": {"approved": {}}}}`
		mergedJSON    = `{"status": "MERGED", "mergeable": true, "current_revision": "` + serverHead + `", "labels": {"Code-Review": {"approved": {}}}}`
	)
	submitted := false
	npoll := 0
	srv.setReply("/a/changes/proj~master~I123456789", gerritReply{f: func() gerritReply {
		if !submitted {
			return gerritReply{body: ")]}'\n" + newJSON}
		}
		if npoll++; npoll <= 2 {
			return gerritReply{body: ")]}'\n" + submittedJSON}
		}
		return gerritReply{body: ")]}'\n" + mergedJSON}
	}})
	srv.setReply("/a/changes/proj~master~I123456789/submit", gerritReply{f: func() gerritReply {
		if submitted {
			return gerritReply{status: 409}
		}
		submitted = true
		return gerritReply{body: ")]}'\n" + submittedJSON}
	}})
	testMain(t, "submit")
	testRan(t,
		"git fetch -q",
		"git checkout -q -B work "+serverHead+" --")
}