package provider

import (
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"orchestra/internal/domain"
	"orchestra/internal/store"
)

func TestGiteaCommentsFetchAfterCursor(t *testing.T) {
	var path string
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		path = r.URL.Path
		// Deliberately out of order, to prove the source sorts by id.
		w.Write([]byte(`[
			{"id":920,"body":"and keep the flag","user":{"login":"kami"},"created_at":"2026-08-26T12:02:00Z"},
			{"id":917,"body":"older","user":{"login":"kami"},"created_at":"2026-08-26T11:00:00Z"},
			{"id":918,"body":"no, use b","user":{"login":"kami"},"created_at":"2026-08-26T12:00:00Z"}
		]`))
	}))
	defer srv.Close()

	g := GiteaComments{Gitea{BaseURL: srv.URL, Owner: "kami", Repo: "orchestra", Project: "p"}}
	task := domain.Task{ID: "t1", Source: g.SourceName(), ExternalID: "381"}

	got, next, err := g.FetchAfter(context.Background(), task, store.SourceCursor{Cursor: "917"})
	if err != nil {
		t.Fatal(err)
	}
	if path != "/api/v1/repos/kami/orchestra/issues/381/comments" {
		t.Fatalf("path = %s", path)
	}
	if len(got) != 2 || got[0].ExternalID != "918" || got[1].ExternalID != "920" {
		t.Fatalf("inputs = %+v", got)
	}
	if got[0].Body != "no, use b" || got[0].Author != "kami" || got[0].Provider != "gitea:p" {
		t.Fatalf("first input = %+v", got[0])
	}
	if next.Cursor != "920" || next.TaskID != "t1" {
		t.Fatalf("next = %+v", next)
	}

	// Nothing new: the cursor must stay put rather than regress.
	got, next, err = g.FetchAfter(context.Background(), task, store.SourceCursor{Cursor: "920"})
	if err != nil || len(got) != 0 {
		t.Fatalf("inputs=%+v err=%v", got, err)
	}
	if next.Cursor != "920" {
		t.Fatalf("next = %+v", next)
	}
}

func TestGiteaCommentsIgnoresForeignAndUnkeyedTasks(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		t.Errorf("unexpected request to %s", r.URL.Path)
	}))
	defer srv.Close()
	g := GiteaComments{Gitea{BaseURL: srv.URL, Owner: "kami", Repo: "orchestra", Project: "p"}}
	for name, task := range map[string]domain.Task{
		"other source": {ID: "t1", Source: "vikunja", ExternalID: "381"},
		"no issue":     {ID: "t1", Source: g.SourceName()},
	} {
		got, _, err := g.FetchAfter(context.Background(), task, store.SourceCursor{})
		if err != nil || len(got) != 0 {
			t.Fatalf("%s: inputs=%+v err=%v", name, got, err)
		}
	}
}

func TestGiteaCommentsRejectsUnparsableCursorAndHTTPError(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		http.Error(w, "boom", 500)
	}))
	defer srv.Close()
	g := GiteaComments{Gitea{BaseURL: srv.URL, Owner: "kami", Repo: "orchestra", Project: "p"}}
	task := domain.Task{ID: "t1", Source: g.SourceName(), ExternalID: "381"}
	if _, _, err := g.FetchAfter(context.Background(), task, store.SourceCursor{Cursor: "abc"}); err == nil {
		t.Fatal("bad cursor must not be treated as zero")
	}
	if _, _, err := g.FetchAfter(context.Background(), task, store.SourceCursor{}); err == nil {
		t.Fatal("http failure must be reported")
	}
}

// The issue body is the task's own statement of what it wants. It must reach
// the store, because every rendered context ranks it above continuity and
// below only a human decision.
func TestGiteaIngestCarriesTheIssueBody(t *testing.T) {
	body := `[{"number":1,"title":"Add a --version flag","body":"Print one version line and exit 0. Keep --help working.","state":"open"}]`
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Write([]byte(body))
	}))
	defer srv.Close()
	out := &sink{}
	g := Gitea{BaseURL: srv.URL, Owner: "kami", Repo: "test-e2e", Project: "test-e2e"}
	if _, err := g.Poll(context.Background(), out); err != nil {
		t.Fatal(err)
	}
	if len(out.events) != 1 {
		t.Fatalf("events = %d", len(out.events))
	}
	var p struct {
		Title       string `json:"title"`
		Description string `json:"description"`
	}
	if err := json.Unmarshal(out.events[0].Payload, &p); err != nil {
		t.Fatal(err)
	}
	if p.Title == "" {
		t.Fatal("title missing")
	}
	if !strings.Contains(p.Description, "Keep --help working") {
		t.Fatalf("description = %q", p.Description)
	}
}