package main

import (
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"
)

func TestSyncPullFull(t *testing.T) {
	app := testApp(t)
	admin := testAdminUser(t, app)
	token := testToken(t, app, admin)
	mux := testMux(app)

	p, _ := app.createParticipant(Participant{PreferredName: "Titania", Email: "titania@example.com"})
	dept, _ := app.createDepartment(Department{Name: "Gate"})
	deptID := dept.ID
	app.createVolunteer(Volunteer{Name: "Titania", ParticipantID: p.ID, DepartmentID: &deptID})
	app.createShift(Shift{DepartmentID: deptID, Name: "AM", Day: "2026-03-15", StartTime: "08:00", EndTime: "12:00"})

	req := testAuthRequest("GET", "/api/sync/pull", nil, token)
	w := httptest.NewRecorder()
	mux.ServeHTTP(w, req)

	if w.Code != http.StatusOK {
		t.Fatalf("status = %d", w.Code)
	}
	result := parseJSON(t, w)

	if result["server_time"] == nil {
		t.Error("missing server_time")
	}
	participants := result["participants"].([]any)
	if len(participants) != 2 { // admin + Titania
		t.Errorf("participants = %d, want 2", len(participants))
	}
	depts := result["departments"].([]any)
	if len(depts) != 1 {
		t.Errorf("departments = %d, want 1", len(depts))
	}
}

func TestSyncPullIncremental(t *testing.T) {
	app := testApp(t)
	admin := testAdminUser(t, app)
	token := testToken(t, app, admin)
	mux := testMux(app)

	// Backdate admin participant so it falls before the "since" cutoff.
	app.db.Exec(`UPDATE participants SET updated_at = '2026-01-01T00:00:00Z' WHERE id = ?`, admin.ID)

	p1, _ := app.createParticipant(Participant{PreferredName: "Titania", Email: "titania@example.com"})
	app.db.Exec(`UPDATE participants SET updated_at = '2026-01-01T00:00:00Z' WHERE id = ?`, p1.ID)

	since := "2026-01-01T12:00:00Z"

	// Lysander created with default updated_at (now), which is after our since
	app.createParticipant(Participant{PreferredName: "Lysander", Email: "lysander@example.com"})

	req := testAuthRequest("GET", "/api/sync/pull?since="+since, nil, token)
	w := httptest.NewRecorder()
	mux.ServeHTTP(w, req)

	result := parseJSON(t, w)
	participants := result["participants"].([]any)
	if len(participants) != 1 {
		t.Errorf("incremental: got %d participants, want 1", len(participants))
	}
	if len(participants) == 1 {
		p := participants[0].(map[string]any)
		if p["preferred_name"] != "Lysander" {
			t.Errorf("preferred_name = %v, want Lysander", p["preferred_name"])
		}
	}
}

func TestSyncPullIncludesSoftDeleted(t *testing.T) {
	app := testApp(t)
	admin := testAdminUser(t, app)
	token := testToken(t, app, admin)
	mux := testMux(app)

	// Backdate admin participant.
	app.db.Exec(`UPDATE participants SET updated_at = '2026-01-01T00:00:00Z' WHERE id = ?`, admin.ID)

	p, _ := app.createParticipant(Participant{PreferredName: "Titania", Email: "titania@example.com"})
	app.db.Exec(`UPDATE participants SET updated_at = '2026-01-01T00:00:00Z' WHERE id = ?`, p.ID)

	since := "2026-01-01T12:00:00Z"

	// Delete updates updated_at to now(), which is after our since
	app.deleteParticipant(p.ID)

	req := testAuthRequest("GET", "/api/sync/pull?since="+since, nil, token)
	w := httptest.NewRecorder()
	mux.ServeHTTP(w, req)

	var result struct {
		Participants []struct {
			ID        int     `json:"id"`
			DeletedAt *string `json:"deleted_at"`
		} `json:"participants"`
	}
	json.Unmarshal(w.Body.Bytes(), &result)

	if len(result.Participants) != 1 {
		t.Fatalf("got %d participants, want 1", len(result.Participants))
	}
	if result.Participants[0].DeletedAt == nil {
		t.Error("deleted_at should be set for soft-deleted record")
	}
}