// Copyright (C) 2026 Dcntrlized
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

package gitea

import (
	"context"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"net/http/httptest"
	"strconv"
	"strings"
	"testing"
)

func TestAuthHeaderAndListPullFilesPagination(t *testing.T) {
	var pages []int
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path != "/api/v1/repos/o/r/pulls/3/files" {
			t.Errorf("unexpected path %s", r.URL.Path)
		}
		if got := r.Header.Get("Authorization"); got != "token tok" {
			t.Errorf("Authorization = %q", got)
		}
		page, _ := strconv.Atoi(r.URL.Query().Get("page"))
		pages = append(pages, page)
		n := pageSize
		if page == 2 {
			n = 3
		}
		files := make([]File, 0, n)
		for i := 0; i < n; i++ {
			files = append(files, File{Filename: fmt.Sprintf("f%d-%d.go", page, i), Status: "added"})
		}
		_ = json.NewEncoder(w).Encode(files)
	}))
	defer srv.Close()

	got, err := New(srv.URL, "tok").ListPullFiles(context.Background(), "o/r", 3)
	if err != nil {
		t.Fatal(err)
	}
	if len(got) != pageSize+3 {
		t.Fatalf("got %d files, want %d", len(got), pageSize+3)
	}
	if len(pages) != 2 || pages[0] != 1 || pages[1] != 2 {
		t.Fatalf("pages = %v, want [1 2]", pages)
	}
}

func TestCreateStatus(t *testing.T) {
	var gotMethod, gotPath, gotBody string
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		gotMethod, gotPath = r.Method, r.URL.Path
		b, _ := io.ReadAll(r.Body)
		gotBody = string(b)
		w.WriteHeader(http.StatusCreated)
	}))
	defer srv.Close()

	err := New(srv.URL, "tok").CreateStatus(context.Background(), "o/r", "abc123", "success", "license-bot / addlicense", "ok", "")
	if err != nil {
		t.Fatal(err)
	}
	if gotMethod != http.MethodPost || gotPath != "/api/v1/repos/o/r/statuses/abc123" {
		t.Fatalf("%s %s", gotMethod, gotPath)
	}
	for _, want := range []string{`"state":"success"`, `"context":"license-bot / addlicense"`, `"description":"ok"`} {
		if !strings.Contains(gotBody, want) {
			t.Fatalf("body %s missing %s", gotBody, want)
		}
	}
}

func TestCommentLifecyclePaths(t *testing.T) {
	var paths []string
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		paths = append(paths, r.Method+" "+r.URL.Path)
		w.Header().Set("Content-Type", "application/json")
		if r.Method == http.MethodGet {
			_ = json.NewEncoder(w).Encode([]Comment{{ID: 42, Body: "hi"}})
			return
		}
		if r.Method == http.MethodPost {
			w.WriteHeader(http.StatusCreated)
			_ = json.NewEncoder(w).Encode(Comment{ID: 43})
			return
		}
		w.WriteHeader(http.StatusOK)
	}))
	defer srv.Close()

	c := New(srv.URL, "tok")
	ctx := context.Background()
	if _, err := c.ListIssueComments(ctx, "o/r", 9); err != nil {
		t.Fatal(err)
	}
	if _, err := c.CreateIssueComment(ctx, "o/r", 9, "body"); err != nil {
		t.Fatal(err)
	}
	if err := c.EditIssueComment(ctx, "o/r", 42, "body"); err != nil {
		t.Fatal(err)
	}
	want := []string{
		"GET /api/v1/repos/o/r/issues/9/comments",
		"POST /api/v1/repos/o/r/issues/9/comments",
		"PATCH /api/v1/repos/o/r/issues/comments/42",
	}
	if len(paths) != len(want) {
		t.Fatalf("paths = %v", paths)
	}
	for i := range want {
		if paths[i] != want[i] {
			t.Fatalf("paths = %v, want %v", paths, want)
		}
	}
}

func TestAPIErrorCarriesStatus(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		http.Error(w, "nope", http.StatusForbidden)
	}))
	defer srv.Close()

	_, err := New(srv.URL, "tok").GetPull(context.Background(), "o/r", 1)
	if err == nil {
		t.Fatal("expected an error")
	}
	apiErr, ok := err.(*APIError)
	if !ok || apiErr.Status != http.StatusForbidden {
		t.Fatalf("err = %#v", err)
	}
}