package internalhttp

import (
	"bytes"
	"context"
	"net/http"
	"net/http/httptest"
	"testing"
	"time"

	"galaxy/user/internal/service/accountview"
	"galaxy/user/internal/service/adminusers"
	"galaxy/user/internal/service/shared"

	"github.com/stretchr/testify/require"
)

func TestAdminReadHandlersSuccessCases(t *testing.T) {
	t.Parallel()

	handler := mustNewHandler(t, Dependencies{
		GetUserByID: getUserByIDFunc(func(_ context.Context, input adminusers.GetUserByIDInput) (adminusers.LookupResult, error) {
			require.Equal(t, "user-123", input.UserID)
			return adminusers.LookupResult{User: sampleAccountView()}, nil
		}),
		GetUserByEmail: getUserByEmailFunc(func(_ context.Context, input adminusers.GetUserByEmailInput) (adminusers.LookupResult, error) {
			require.Equal(t, "pilot@example.com", input.Email)
			return adminusers.LookupResult{User: sampleAccountView()}, nil
		}),
		GetUserByRaceName: getUserByRaceNameFunc(func(_ context.Context, input adminusers.GetUserByRaceNameInput) (adminusers.LookupResult, error) {
			require.Equal(t, "Pilot Nova", input.RaceName)
			return adminusers.LookupResult{User: sampleAccountView()}, nil
		}),
		ListUsers: listUsersFunc(func(_ context.Context, input adminusers.ListUsersInput) (adminusers.ListUsersResult, error) {
			require.Equal(t, 2, input.PageSize)
			require.Equal(t, "cursor-1", input.PageToken)
			require.Equal(t, "paid", input.PaidState)
			require.Equal(t, "DE", input.DeclaredCountry)
			require.Equal(t, "login_block", input.SanctionCode)
			require.Equal(t, "max_owned_private_games", input.LimitCode)
			require.NotNil(t, input.PaidExpiresBefore)
			require.NotNil(t, input.PaidExpiresAfter)
			require.NotNil(t, input.CanLogin)
			require.NotNil(t, input.CanCreatePrivateGame)
			require.NotNil(t, input.CanJoinGame)
			require.False(t, *input.CanLogin)
			require.True(t, *input.CanCreatePrivateGame)
			require.True(t, *input.CanJoinGame)
			require.Equal(t, time.Date(2026, time.April, 10, 12, 0, 0, 0, time.UTC), input.PaidExpiresBefore.UTC())
			require.Equal(t, time.Date(2026, time.April, 1, 12, 0, 0, 0, time.UTC), input.PaidExpiresAfter.UTC())

			other := sampleAccountView()
			other.UserID = "user-234"
			other.Email = "second@example.com"
			other.RaceName = "Second Pilot"

			return adminusers.ListUsersResult{
				Items:         []accountview.AccountView{sampleAccountView(), other},
				NextPageToken: "cursor-2",
			}, nil
		}),
	})

	tests := []struct {
		name       string
		method     string
		path       string
		body       string
		wantStatus int
		wantBody   string
	}{
		{
			name:       "get user by id",
			method:     http.MethodGet,
			path:       "/api/v1/internal/users/user-123",
			wantStatus: http.StatusOK,
			wantBody:   `{"user":{"user_id":"user-123","email":"pilot@example.com","race_name":"Pilot Nova","preferred_language":"en","time_zone":"Europe/Kaliningrad","declared_country":"DE","entitlement":{"plan_code":"free","is_paid":false,"source":"auth_registration","actor":{"type":"service","id":"user-service"},"reason_code":"initial_free_entitlement","starts_at":"2026-04-09T10:00:00Z","updated_at":"2026-04-09T10:00:00Z"},"active_sanctions":[],"active_limits":[],"created_at":"2026-04-09T10:00:00Z","updated_at":"2026-04-09T10:00:00Z"}}`,
		},
		{
			name:       "get user by email",
			method:     http.MethodPost,
			path:       "/api/v1/internal/user-lookups/by-email",
			body:       `{"email":"pilot@example.com"}`,
			wantStatus: http.StatusOK,
			wantBody:   `{"user":{"user_id":"user-123","email":"pilot@example.com","race_name":"Pilot Nova","preferred_language":"en","time_zone":"Europe/Kaliningrad","declared_country":"DE","entitlement":{"plan_code":"free","is_paid":false,"source":"auth_registration","actor":{"type":"service","id":"user-service"},"reason_code":"initial_free_entitlement","starts_at":"2026-04-09T10:00:00Z","updated_at":"2026-04-09T10:00:00Z"},"active_sanctions":[],"active_limits":[],"created_at":"2026-04-09T10:00:00Z","updated_at":"2026-04-09T10:00:00Z"}}`,
		},
		{
			name:       "get user by race name",
			method:     http.MethodPost,
			path:       "/api/v1/internal/user-lookups/by-race-name",
			body:       `{"race_name":"Pilot Nova"}`,
			wantStatus: http.StatusOK,
			wantBody:   `{"user":{"user_id":"user-123","email":"pilot@example.com","race_name":"Pilot Nova","preferred_language":"en","time_zone":"Europe/Kaliningrad","declared_country":"DE","entitlement":{"plan_code":"free","is_paid":false,"source":"auth_registration","actor":{"type":"service","id":"user-service"},"reason_code":"initial_free_entitlement","starts_at":"2026-04-09T10:00:00Z","updated_at":"2026-04-09T10:00:00Z"},"active_sanctions":[],"active_limits":[],"created_at":"2026-04-09T10:00:00Z","updated_at":"2026-04-09T10:00:00Z"}}`,
		},
		{
			name:       "list users",
			method:     http.MethodGet,
			path:       "/api/v1/internal/users?page_size=2&page_token=cursor-1&paid_state=paid&paid_expires_before=2026-04-10T12:00:00Z&paid_expires_after=2026-04-01T12:00:00Z&declared_country=DE&sanction_code=login_block&limit_code=max_owned_private_games&can_login=false&can_create_private_game=true&can_join_game=true",
			wantStatus: http.StatusOK,
			wantBody:   `{"items":[{"user_id":"user-123","email":"pilot@example.com","race_name":"Pilot Nova","preferred_language":"en","time_zone":"Europe/Kaliningrad","declared_country":"DE","entitlement":{"plan_code":"free","is_paid":false,"source":"auth_registration","actor":{"type":"service","id":"user-service"},"reason_code":"initial_free_entitlement","starts_at":"2026-04-09T10:00:00Z","updated_at":"2026-04-09T10:00:00Z"},"active_sanctions":[],"active_limits":[],"created_at":"2026-04-09T10:00:00Z","updated_at":"2026-04-09T10:00:00Z"},{"user_id":"user-234","email":"second@example.com","race_name":"Second Pilot","preferred_language":"en","time_zone":"Europe/Kaliningrad","declared_country":"DE","entitlement":{"plan_code":"free","is_paid":false,"source":"auth_registration","actor":{"type":"service","id":"user-service"},"reason_code":"initial_free_entitlement","starts_at":"2026-04-09T10:00:00Z","updated_at":"2026-04-09T10:00:00Z"},"active_sanctions":[],"active_limits":[],"created_at":"2026-04-09T10:00:00Z","updated_at":"2026-04-09T10:00:00Z"}],"next_page_token":"cursor-2"}`,
		},
	}

	for _, tt := range tests {
		tt := tt
		t.Run(tt.name, func(t *testing.T) {
			t.Parallel()

			var body *bytes.Buffer
			if tt.body != "" {
				body = bytes.NewBufferString(tt.body)
			} else {
				body = &bytes.Buffer{}
			}

			request := httptest.NewRequest(tt.method, tt.path, body)
			if tt.body != "" {
				request.Header.Set("Content-Type", "application/json")
			}
			recorder := httptest.NewRecorder()

			handler.ServeHTTP(recorder, request)

			require.Equal(t, tt.wantStatus, recorder.Code)
			assertJSONEq(t, recorder.Body.String(), tt.wantBody)
		})
	}
}

func TestAdminReadHandlersErrorCases(t *testing.T) {
	t.Parallel()

	handler := mustNewHandler(t, Dependencies{
		GetUserByID: getUserByIDFunc(func(context.Context, adminusers.GetUserByIDInput) (adminusers.LookupResult, error) {
			return adminusers.LookupResult{}, shared.SubjectNotFound()
		}),
		GetUserByEmail: getUserByEmailFunc(func(context.Context, adminusers.GetUserByEmailInput) (adminusers.LookupResult, error) {
			return adminusers.LookupResult{}, shared.SubjectNotFound()
		}),
		GetUserByRaceName: getUserByRaceNameFunc(func(context.Context, adminusers.GetUserByRaceNameInput) (adminusers.LookupResult, error) {
			return adminusers.LookupResult{}, shared.SubjectNotFound()
		}),
		ListUsers: listUsersFunc(func(context.Context, adminusers.ListUsersInput) (adminusers.ListUsersResult, error) {
			return adminusers.ListUsersResult{}, shared.InvalidRequest("page_token is invalid or does not match current filters")
		}),
	})

	tests := []struct {
		name       string
		method     string
		path       string
		body       string
		wantStatus int
		wantBody   string
	}{
		{
			name:       "get user by id not found",
			method:     http.MethodGet,
			path:       "/api/v1/internal/users/user-missing",
			wantStatus: http.StatusNotFound,
			wantBody:   `{"error":{"code":"subject_not_found","message":"subject not found"}}`,
		},
		{
			name:       "get user by email malformed json",
			method:     http.MethodPost,
			path:       "/api/v1/internal/user-lookups/by-email",
			body:       `{"email":"pilot@example.com","extra":true}`,
			wantStatus: http.StatusBadRequest,
			wantBody:   `{"error":{"code":"invalid_request","message":"request body contains unknown field \"extra\""}}`,
		},
		{
			name:       "get user by race name not found",
			method:     http.MethodPost,
			path:       "/api/v1/internal/user-lookups/by-race-name",
			body:       `{"race_name":"Missing Pilot"}`,
			wantStatus: http.StatusNotFound,
			wantBody:   `{"error":{"code":"subject_not_found","message":"subject not found"}}`,
		},
		{
			name:       "list users invalid page size",
			method:     http.MethodGet,
			path:       "/api/v1/internal/users?page_size=201",
			wantStatus: http.StatusBadRequest,
			wantBody:   `{"error":{"code":"invalid_request","message":"page_size must be between 1 and 200"}}`,
		},
		{
			name:       "list users invalid timestamp",
			method:     http.MethodGet,
			path:       "/api/v1/internal/users?paid_expires_before=not-a-time",
			wantStatus: http.StatusBadRequest,
			wantBody:   `{"error":{"code":"invalid_request","message":"paid_expires_before must be a valid RFC 3339 timestamp"}}`,
		},
		{
			name:       "list users invalid boolean",
			method:     http.MethodGet,
			path:       "/api/v1/internal/users?can_login=maybe",
			wantStatus: http.StatusBadRequest,
			wantBody:   `{"error":{"code":"invalid_request","message":"can_login must be a valid boolean"}}`,
		},
		{
			name:       "list users invalid page token",
			method:     http.MethodGet,
			path:       "/api/v1/internal/users?page_token=cursor-1",
			wantStatus: http.StatusBadRequest,
			wantBody:   `{"error":{"code":"invalid_request","message":"page_token is invalid or does not match current filters"}}`,
		},
	}

	for _, tt := range tests {
		tt := tt
		t.Run(tt.name, func(t *testing.T) {
			t.Parallel()

			var body *bytes.Buffer
			if tt.body != "" {
				body = bytes.NewBufferString(tt.body)
			} else {
				body = &bytes.Buffer{}
			}

			request := httptest.NewRequest(tt.method, tt.path, body)
			if tt.body != "" {
				request.Header.Set("Content-Type", "application/json")
			}
			recorder := httptest.NewRecorder()

			handler.ServeHTTP(recorder, request)

			require.Equal(t, tt.wantStatus, recorder.Code)
			assertJSONEq(t, recorder.Body.String(), tt.wantBody)
		})
	}
}