// Copyright 2019 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package integration

import (
	"net/http"
	"testing"

	auth_model "gitea.dev/models/auth"
	"gitea.dev/models/unittest"
	user_model "gitea.dev/models/user"
	api "gitea.dev/modules/structs"
	"gitea.dev/tests"

	"github.com/stretchr/testify/assert"
)

func compareCommitFiles(t *testing.T, expect []string, files []*api.CommitAffectedFiles) {
	var actual []string
	for i := range files {
		actual = append(actual, files[i].Filename)
	}
	assert.ElementsMatch(t, expect, actual)
}

func TestAPIReposGitCommits(t *testing.T) {
	defer tests.PrepareTestEnv(t)()
	user2 := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
	session := loginUser(t, user2.Name)
	token := getTokenForLoggedInUser(t, session, auth_model.AccessTokenScopeReadRepository)

	// check invalid requests
	req := NewRequestf(t, "GET", "/api/v1/repos/%s/repo1/git/commits/..", user2.Name).AddTokenAuth(token)
	MakeRequest(t, req, http.StatusUnprocessableEntity)

	req = NewRequestf(t, "GET", "/api/v1/repos/%s/repo1/git/commits/ref-not-exist", user2.Name).AddTokenAuth(token)
	MakeRequest(t, req, http.StatusNotFound)

	for _, ref := range [...]string{
		"master", // Branch
		"v1.1",   // Tag
		"65f1",   // short sha
		"65f1bf27bc3bf70f64657658635e66094edbcb4d", // full sha
	} {
		req = NewRequestf(t, "GET", "/api/v1/repos/%s/repo1/git/commits/%s", user2.Name, ref).AddTokenAuth(token)
		MakeRequest(t, req, http.StatusOK)
		// GitHub-compatible
		req = NewRequestf(t, "GET", "/api/v1/repos/%s/repo1/commits/%s", user2.Name, ref).AddTokenAuth(token)
		MakeRequest(t, req, http.StatusOK)
	}
}

func TestAPIReposGitCommitsHEAD(t *testing.T) {
	defer tests.PrepareTestEnv(t)()
	user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
	session := loginUser(t, user.Name)
	token := getTokenForLoggedInUser(t, session, auth_model.AccessTokenScopeReadRepository)

	// HEAD on a valid ref must return 200 (RFC 9110 §9.3.2)
	req := NewRequestf(t, "HEAD", "/api/v1/repos/%s/repo1/git/commits/master", user.Name).
		AddTokenAuth(token)
	MakeRequest(t, req, http.StatusOK)

	// HEAD on a missing sha must return 404, not 405
	req = NewRequestf(t, "HEAD", "/api/v1/repos/%s/repo1/git/commits/12345", user.Name).
		AddTokenAuth(token)
	MakeRequest(t, req, http.StatusNotFound)
}

func TestAPIReposGitCommitList(t *testing.T) {
	defer tests.PrepareTestEnv(t)()
	user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
	// Login as User2.
	session := loginUser(t, user.Name)
	token := getTokenForLoggedInUser(t, session, auth_model.AccessTokenScopeReadRepository)

	for _, testCase := range []struct {
		name, path, total string
		commits           []string
		files             [][]string
	}{
		// Test getting commits (Page 1)
		{
			"Page1", "repo20/commits?not=master&sha=remove-files-a", "2",
			[]string{"cfe3b3c1fd36fba04f9183287b106497e1afe986", "c8e31bc7688741a5287fcde4fbb8fc129ca07027"},
			[][]string{{"link_hi", "test.csv"}, {"test.csv"}},
		},
		// Test getting commits (Page 1)
		{
			"NotMaster", "repo16/commits", "3",
			[]string{"69554a64c1e6030f051e5c3f94bfbd773cd6a324", "27566bd5738fc8b4e3fef3c5e72cce608537bd95", "5099b81332712fe655e34e8dd63574f503f61811"},
			[][]string{{"readme.md"}, {"readme.md"}, {"readme.md"}},
		},
		// Test getting commits (Page=1, Branch=good-sign)
		{
			"DifferentBranch", "repo16/commits?sha=good-sign", "",
			[]string{"f27c2b2b03dcab38beaf89b0ab4ff61f6de63441"},
			[][]string{{"readme.md"}},
		},
		{
			"FileHistory", "repo16/commits?path=readme.md&sha=good-sign", "1",
			[]string{"f27c2b2b03dcab38beaf89b0ab4ff61f6de63441"},
			[][]string{{"readme.md"}},
		},
		{
			"FileHistoryNotOnMaster", "repo20/commits?path=test.csv&sha=add-csv&not=master", "1",
			[]string{"c8e31bc7688741a5287fcde4fbb8fc129ca07027"},
			[][]string{{"test.csv"}},
		},
	} {
		t.Run(testCase.name, func(t *testing.T) {
			req := NewRequestf(t, "GET", "/api/v1/repos/%s/%s", user.Name, testCase.path).
				AddTokenAuth(token)
			resp := MakeRequest(t, req, http.StatusOK)
			apiData := DecodeJSON(t, resp, []api.Commit{})

			assert.Len(t, apiData, len(testCase.commits))
			for i, sha := range testCase.commits {
				assert.Equal(t, sha, apiData[i].CommitMeta.SHA)
				compareCommitFiles(t, testCase.files[i], apiData[i].Files)
			}
			if testCase.total != "" {
				assert.Equal(t, testCase.total, resp.Header().Get("X-Total"))
			}
		})
	}
}

func TestAPIReposGitCommitListPage2Empty(t *testing.T) {
	defer tests.PrepareTestEnv(t)()
	user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
	// Login as User2.
	session := loginUser(t, user.Name)
	token := getTokenForLoggedInUser(t, session, auth_model.AccessTokenScopeReadRepository)

	// Test getting commits (Page=2)
	req := NewRequestf(t, "GET", "/api/v1/repos/%s/repo16/commits?page=2", user.Name).
		AddTokenAuth(token)
	resp := MakeRequest(t, req, http.StatusOK)

	apiData := DecodeJSON(t, resp, []api.Commit{})

	assert.Empty(t, apiData)
}

func TestAPIReposGitCommitListWithoutSelectFields(t *testing.T) {
	defer tests.PrepareTestEnv(t)()
	user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
	// Login as User2.
	session := loginUser(t, user.Name)
	token := getTokenForLoggedInUser(t, session, auth_model.AccessTokenScopeReadRepository)

	// Test getting commits without files, verification, and stats
	req := NewRequestf(t, "GET", "/api/v1/repos/%s/repo16/commits?sha=good-sign&stat=false&files=false&verification=false", user.Name).
		AddTokenAuth(token)
	resp := MakeRequest(t, req, http.StatusOK)

	apiData := DecodeJSON(t, resp, []api.Commit{})

	assert.Len(t, apiData, 1)
	assert.Equal(t, "f27c2b2b03dcab38beaf89b0ab4ff61f6de63441", apiData[0].CommitMeta.SHA)
	assert.Equal(t, (*api.CommitStats)(nil), apiData[0].Stats)
	assert.Equal(t, (*api.PayloadCommitVerification)(nil), apiData[0].RepoCommit.Verification)
	assert.Equal(t, ([]*api.CommitAffectedFiles)(nil), apiData[0].Files)
}

func TestDownloadCommitDiffOrPatch(t *testing.T) {
	defer tests.PrepareTestEnv(t)()
	user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
	// Login as User2.
	session := loginUser(t, user.Name)
	token := getTokenForLoggedInUser(t, session, auth_model.AccessTokenScopeReadRepository)

	// Test getting diff
	reqDiff := NewRequestf(t, "GET", "/api/v1/repos/%s/repo16/git/commits/f27c2b2b03dcab38beaf89b0ab4ff61f6de63441.diff", user.Name).
		AddTokenAuth(token)
	resp := MakeRequest(t, reqDiff, http.StatusOK)
	assert.Equal(t,
		"commit f27c2b2b03dcab38beaf89b0ab4ff61f6de63441\nAuthor: User2 <user2@example.com>\nDate:   Sun Aug 6 19:55:01 2017 +0200\n\n    good signed commit\n\ndiff --git a/readme.md b/readme.md\nnew file mode 100644\nindex 0000000..458121c\n--- /dev/null\n+++ b/readme.md\n@@ -0,0 +1 @@\n+good sign\n",
		resp.Body.String())

	// Test getting patch
	reqPatch := NewRequestf(t, "GET", "/api/v1/repos/%s/repo16/git/commits/f27c2b2b03dcab38beaf89b0ab4ff61f6de63441.patch", user.Name).
		AddTokenAuth(token)
	resp = MakeRequest(t, reqPatch, http.StatusOK)
	assert.Equal(t,
		"From f27c2b2b03dcab38beaf89b0ab4ff61f6de63441 Mon Sep 17 00:00:00 2001\nFrom: User2 <user2@example.com>\nDate: Sun, 6 Aug 2017 19:55:01 +0200\nSubject: [PATCH] good signed commit\n\n---\n readme.md | 1 +\n 1 file changed, 1 insertion(+)\n create mode 100644 readme.md\n\ndiff --git a/readme.md b/readme.md\nnew file mode 100644\nindex 0000000..458121c\n--- /dev/null\n+++ b/readme.md\n@@ -0,0 +1 @@\n+good sign\n",
		resp.Body.String())
}

func TestGetFileHistoryEmptyDateRange(t *testing.T) {
	defer tests.PrepareTestEnv(t)()
	user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
	// Login as User2.
	session := loginUser(t, user.Name)
	token := getTokenForLoggedInUser(t, session, auth_model.AccessTokenScopeReadRepository)

	// readme.md exists in repo16 but no commits fall before 1970, so the date
	// filter yields an empty range: this must return 200 with an empty list,
	// not 404 (regression: a valid path with an empty date range was a 404).
	req := NewRequestf(t, "GET", "/api/v1/repos/%s/repo16/commits?path=readme.md&sha=good-sign&until=1970-01-01T00:00:00Z", user.Name).
		AddTokenAuth(token)
	resp := MakeRequest(t, req, http.StatusOK)

	apiData := DecodeJSON(t, resp, []api.Commit{})
	assert.Empty(t, apiData)
	assert.Equal(t, "0", resp.Header().Get("X-Total"))

	// a path that does not exist must still return 404 even with a date filter
	req = NewRequestf(t, "GET", "/api/v1/repos/%s/repo16/commits?path=does-not-exist.md&sha=good-sign&until=1970-01-01T00:00:00Z", user.Name).
		AddTokenAuth(token)
	MakeRequest(t, req, http.StatusNotFound)
}