package web_test

import (
	"context"
	"fmt"
	"fuj-management/go/internal/config"
	"fuj-management/go/internal/domain/reconcile"
	"fuj-management/go/internal/web"
	"fuj-management/go/internal/web/api"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
)

// fixtureSources returns one adult ("Test Member", tier A) with a 2026-01 fee
// of 750 CZK (4 sessions) and a matching payment of 750 — mirrors Python's
// test_adults_route fixture.
type fixtureSources struct{}

func (fixtureSources) LoadAdults(_ context.Context) ([]reconcile.Member, []string, error) {
	return []reconcile.Member{
		{Name: "Test Member", Tier: "A", Fees: map[string]reconcile.FeeData{
			"2026-01": {Expected: 750, Attendance: 4},
		}},
	}, []string{"2026-01"}, nil
}

func (fixtureSources) LoadJuniors(_ context.Context) ([]reconcile.Member, []string, error) {
	return nil, nil, nil
}

func (fixtureSources) LoadTransactions(_ context.Context) ([]reconcile.Transaction, error) {
	amt := float64(750)
	return []reconcile.Transaction{
		{Date: "2026-01-01", Amount: 750, Person: "Test Member", Purpose: "2026-01", InferredAmount: &amt},
	}, nil
}

func (fixtureSources) LoadExceptions(_ context.Context) (map[reconcile.ExceptionKey]reconcile.Exception, error) {
	return nil, nil
}

func fixtureHandler(t *testing.T) *api.Handler {
	t.Helper()
	return &api.Handler{
		Sources: fixtureSources{},
		Config:  config.Config{BankAccount: "CZ0000000000000000000000"},
	}
}

func TestHTMLHandlerSmoke(t *testing.T) {
	renderer, err := web.NewRenderer()
	if err != nil {
		t.Fatalf("NewRenderer: %v", err)
	}
	b := web.BuildInfo{Version: "v0", Commit: "abc1234", BuildDate: "2026-01-01"}
	h := web.NewHTMLHandler(renderer, b, fixtureHandler(t))

	cases := []struct {
		path    string
		handler http.HandlerFunc
	}{
		{"/adults", h.ServeAdults},
		{"/juniors", h.ServeJuniors},
		{"/payments", h.ServePayments},
		{"/sync-bank", h.ServeSync},
		{"/flush-cache", h.ServeFlushCache},
	}

	for _, tc := range cases {
		t.Run(tc.path, func(t *testing.T) {
			req := httptest.NewRequest(http.MethodGet, tc.path, nil)
			w := httptest.NewRecorder()
			tc.handler(w, req)

			if w.Code != http.StatusOK {
				t.Errorf("status = %d, want 200", w.Code)
			}
			if ct := w.Header().Get("Content-Type"); !strings.HasPrefix(ct, "text/html") {
				t.Errorf("Content-Type = %q, want text/html", ct)
			}

			body := w.Body.String()
			if n := strings.Count(body, `class="active"`); n != 1 {
				t.Errorf(`class="active" count = %d, want 1`, n)
			}
			want := fmt.Sprintf(`href="%s" class="active"`, tc.path)
			if !strings.Contains(body, want) {
				t.Errorf("missing active link %q in body", want)
			}
		})
	}
}

func TestAdultsPage(t *testing.T) {
	renderer, err := web.NewRenderer()
	if err != nil {
		t.Fatalf("NewRenderer: %v", err)
	}
	b := web.BuildInfo{Version: "v0", Commit: "abc1234", BuildDate: "2026-01-01"}
	h := web.NewHTMLHandler(renderer, b, fixtureHandler(t))

	req := httptest.NewRequest(http.MethodGet, "/adults", nil)
	w := httptest.NewRecorder()
	h.ServeAdults(w, req)

	if w.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200", w.Code)
	}

	body := w.Body.String()

	for _, want := range []string{
		"Adults Dashboard",
		"Test Member",
		"750/750 CZK (4)", // paid/expected (attendance)
	} {
		if !strings.Contains(body, want) {
			t.Errorf("body missing %q", want)
		}
	}

	// Python assertion: cell text never says literally "OK"
	if strings.Contains(body, ">OK<") {
		t.Error("body should not contain >OK<")
	}
}

func TestModalMarkup(t *testing.T) {
	renderer, err := web.NewRenderer()
	if err != nil {
		t.Fatalf("NewRenderer: %v", err)
	}
	b := web.BuildInfo{Version: "v0", Commit: "abc1234", BuildDate: "2026-01-01"}
	h := web.NewHTMLHandler(renderer, b, fixtureHandler(t))

	cases := []struct {
		path    string
		handler http.HandlerFunc
		page    string
		wantRow string // data-name present only when the page has rows
	}{
		{"/adults", h.ServeAdults, "adults", `data-name="Test Member"`},
		{"/juniors", h.ServeJuniors, "juniors", ""},
	}

	for _, tc := range cases {
		t.Run(tc.path, func(t *testing.T) {
			req := httptest.NewRequest(http.MethodGet, tc.path, nil)
			w := httptest.NewRecorder()
			tc.handler(w, req)
			body := w.Body.String()

			for _, want := range []string{
				`data-page="` + tc.page + `"`,
				`id="memberModal"`,
				`/static/js/member-detail.js`,
			} {
				if !strings.Contains(body, want) {
					t.Errorf("body missing %q", want)
				}
			}
			if tc.wantRow != "" && !strings.Contains(body, tc.wantRow) {
				t.Errorf("body missing info-icon row %q", tc.wantRow)
			}
		})
	}
}

func TestPaymentsPage(t *testing.T) {
	renderer, err := web.NewRenderer()
	if err != nil {
		t.Fatalf("NewRenderer: %v", err)
	}
	b := web.BuildInfo{Version: "v0", Commit: "abc1234", BuildDate: "2026-01-01"}
	h := web.NewHTMLHandler(renderer, b, fixtureHandler(t))

	req := httptest.NewRequest(http.MethodGet, "/payments", nil)
	w := httptest.NewRecorder()
	h.ServePayments(w, req)

	if w.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200", w.Code)
	}

	body := w.Body.String()

	for _, want := range []string{
		"Payments Ledger",
		"<h2>Test Member</h2>",
		"750 CZK",
		"2026-01-01",
		"2026-01",
	} {
		if !strings.Contains(body, want) {
			t.Errorf("body missing %q", want)
		}
	}
}