package web_test

import (
	"context"
	"net/http"
	"net/http/httptest"
	"net/url"
	"strings"
	"testing"

	"github.com/netcell-it/deklarix/internal/rules"
)

// checkAndReturnSubID führt eine Pre-Publish-Prüfung durch und liefert die
// dabei angelegte submission_id — Hilfsfunktion für Tests, die einen
// bereits existierenden Beitrag brauchen, ohne den ganzen Ablauf jedes Mal
// auszuschreiben.
func checkAndReturnSubID(t *testing.T, s interface {
	ServeHTTP(w http.ResponseWriter, r *http.Request)
}, cookie *http.Cookie) string {
	t.Helper()
	form := checkForm()
	req := httptest.NewRequest(http.MethodPost, "/pruefen", strings.NewReader(form.Encode()))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	req.AddCookie(cookie)
	w := httptest.NewRecorder()
	s.ServeHTTP(w, req)
	if w.Code != http.StatusOK {
		t.Fatalf("check status = %d, body: %s", w.Code, w.Body.String())
	}
	body := w.Body.String()
	const marker = `name="submission_id" value="`
	idx := strings.Index(body, marker)
	if idx == -1 {
		t.Fatalf("expected a submission_id field in the result, got: %s", body)
	}
	rest := body[idx+len(marker):]
	return rest[:strings.Index(rest, `"`)]
}

func TestSubmissionListShowsOwnSubmissionsOnly(t *testing.T) {
	fs := newFakeStore()
	s := newServer(t, fakeExtractor{facts: rules.Facts{
		Platform: "instagram", Jurisdiction: "DE", Consideration: rules.ConsiderationNone,
	}}, fs)

	cookieA := seedAccount(t, fs, "Mandant A", "a@example.com")
	cookieB := seedAccount(t, fs, "Mandant B", "b@example.com")

	subA := checkAndReturnSubID(t, s, cookieA)
	_ = checkAndReturnSubID(t, s, cookieB)

	resp := getWithCookie(t, s, cookieA, "/beitraege")
	if resp.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200, body: %s", resp.Code, resp.Body.String())
	}
	body := resp.Body.String()
	if !strings.Contains(body, "/beitraege/"+subA) {
		t.Errorf("expected Mandant A's own submission link, got: %s", body)
	}

	// Mandant B hat genau einen eigenen Beitrag, keinen von A.
	respB := getWithCookie(t, s, cookieB, "/beitraege")
	if strings.Contains(respB.Body.String(), "/beitraege/"+subA) {
		t.Errorf("Mandant B should not see Mandant A's submission, got: %s", respB.Body.String())
	}
}

func TestSubmissionListRequiresSession(t *testing.T) {
	s, _, _ := newAuthedTestServer(t, fakeExtractor{})
	req := httptest.NewRequest(http.MethodGet, "/beitraege", nil)
	w := httptest.NewRecorder()
	s.ServeHTTP(w, req)
	if w.Code != http.StatusSeeOther {
		t.Fatalf("status = %d, want 303 redirect to /login", w.Code)
	}
}

func TestSubmissionDetailShowsFactsAndFindings(t *testing.T) {
	s, fs, cookie := newAuthedTestServer(t, fakeExtractor{facts: rules.Facts{
		Platform: "instagram", Jurisdiction: "DE", Consideration: rules.ConsiderationPaid,
		DisclosurePresent: true, DisclosureWording: "Werbung", DisclosureBeforeCut: false,
	}})
	subID := checkAndReturnSubID(t, s, cookie)
	_ = fs

	resp := getWithCookie(t, s, cookie, "/beitraege/"+subID)
	if resp.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200, body: %s", resp.Code, resp.Body.String())
	}
	body := resp.Body.String()
	if !strings.Contains(body, "WK-004") {
		t.Errorf("expected the finding to be shown, got: %s", body)
	}
	if !strings.Contains(body, "/veroeffentlichen") {
		t.Errorf("expected an archive option for a checked submission, got: %s", body)
	}
}

func TestSubmissionDetailTenantIsolation(t *testing.T) {
	fs := newFakeStore()
	s := newServer(t, fakeExtractor{facts: rules.Facts{
		Platform: "instagram", Jurisdiction: "DE", Consideration: rules.ConsiderationNone,
	}}, fs)
	cookieA := seedAccount(t, fs, "Mandant A", "a@example.com")
	cookieB := seedAccount(t, fs, "Mandant B", "b@example.com")
	subA := checkAndReturnSubID(t, s, cookieA)

	resp := getWithCookie(t, s, cookieB, "/beitraege/"+subA)
	if resp.Code != http.StatusNotFound {
		t.Fatalf("cross-tenant detail status = %d, want 404", resp.Code)
	}
}

func TestParticipantAddUpdateDeleteFlow(t *testing.T) {
	s, _, cookie := newAuthedTestServer(t, fakeExtractor{facts: rules.Facts{
		Platform: "instagram", Jurisdiction: "DE", Consideration: rules.ConsiderationNone,
	}})
	subID := checkAndReturnSubID(t, s, cookie)

	addResp := postForm(t, s, cookie, "/beitraege/"+subID+"/beteiligte", url.Values{
		"role": {"creator"}, "name": {"Max Mustermann"},
	})
	if addResp.Code != http.StatusOK {
		t.Fatalf("add participant status = %d, body: %s", addResp.Code, addResp.Body.String())
	}
	if !strings.Contains(addResp.Body.String(), "Max Mustermann") {
		t.Fatalf("expected the new participant in the response, got: %s", addResp.Body.String())
	}

	detailResp := getWithCookie(t, s, cookie, "/beitraege/"+subID)
	if !strings.Contains(detailResp.Body.String(), "Max Mustermann") {
		t.Fatalf("expected the participant on the detail page, got: %s", detailResp.Body.String())
	}

	// Beteiligten-ID aus dem Update-Formular extrahieren.
	body := addResp.Body.String()
	const marker = "/beteiligte/"
	idx := strings.Index(body, marker)
	if idx == -1 {
		t.Fatalf("expected a participant action URL, got: %s", body)
	}
	rest := body[idx+len(marker):]
	pID := rest[:strings.Index(rest, "/")]

	updateResp := postForm(t, s, cookie, "/beitraege/"+subID+"/beteiligte/"+pID+"/aktualisieren", url.Values{
		"vorgegeben": {"on"}, "freigegeben": {"on"},
	})
	if updateResp.Code != http.StatusOK {
		t.Fatalf("update participant status = %d, body: %s", updateResp.Code, updateResp.Body.String())
	}
	if !strings.Contains(updateResp.Body.String(), "freigegeben am") {
		t.Fatalf("expected an approval timestamp after freigegeben=true, got: %s", updateResp.Body.String())
	}

	deleteResp := postForm(t, s, cookie, "/beitraege/"+subID+"/beteiligte/"+pID+"/loeschen", url.Values{})
	if deleteResp.Code != http.StatusOK {
		t.Fatalf("delete participant status = %d, body: %s", deleteResp.Code, deleteResp.Body.String())
	}
	if strings.Contains(deleteResp.Body.String(), "Max Mustermann") {
		t.Fatalf("expected the participant to be gone after delete, got: %s", deleteResp.Body.String())
	}
}

func TestParticipantActionsRejectCrossTenantAccess(t *testing.T) {
	fs := newFakeStore()
	s := newServer(t, fakeExtractor{facts: rules.Facts{
		Platform: "instagram", Jurisdiction: "DE", Consideration: rules.ConsiderationNone,
	}}, fs)
	cookieA := seedAccount(t, fs, "Mandant A", "a@example.com")
	cookieB := seedAccount(t, fs, "Mandant B", "b@example.com")
	subA := checkAndReturnSubID(t, s, cookieA)

	// Mandant B darf für As Beitrag gar keinen Beteiligten anlegen.
	addResp := postForm(t, s, cookieB, "/beitraege/"+subA+"/beteiligte", url.Values{
		"role": {"creator"}, "name": {"Fremd"},
	})
	if addResp.Code != http.StatusNotFound {
		t.Fatalf("cross-tenant add status = %d, want 404", addResp.Code)
	}

	p, err := fs.CreateParticipant(context.Background(), subA, "creator", "Eigener Beteiligter", false, false)
	if err != nil {
		t.Fatalf("CreateParticipant: %v", err)
	}

	updateResp := postForm(t, s, cookieB, "/beitraege/"+subA+"/beteiligte/"+p.ID+"/aktualisieren", url.Values{
		"vorgegeben": {"on"},
	})
	if updateResp.Code != http.StatusNotFound {
		t.Fatalf("cross-tenant update status = %d, want 404", updateResp.Code)
	}

	deleteResp := postForm(t, s, cookieB, "/beitraege/"+subA+"/beteiligte/"+p.ID+"/loeschen", url.Values{})
	if deleteResp.Code != http.StatusNotFound {
		t.Fatalf("cross-tenant delete status = %d, want 404", deleteResp.Code)
	}

	if _, err := fs.GetParticipant(context.Background(), p.ID); err != nil {
		t.Fatalf("participant should still exist after rejected cross-tenant delete: %v", err)
	}
}