package postgresflexalpha

import (
	"context"
	"testing"

	"github.com/google/go-cmp/cmp"
	"github.com/stackitcloud/stackit-sdk-go/services/postgresflex/v3alpha1api"
)

func TestGetDatabase(t *testing.T) {
	mockResp := func(page int32) (*v3alpha1api.ListDatabasesResponse, error) {
		if page == 1 {
			return &v3alpha1api.ListDatabasesResponse{
				Databases: []v3alpha1api.ListDatabase{
					{Id: int32(1), Name: "first"},
					{Id: int32(2), Name: "second"},
				},
				Pagination: v3alpha1api.Pagination{
					Page:       int32(1),
					TotalPages: int32(2),
					Size:       int32(3),
				},
			}, nil
		}

		if page == 2 {
			return &v3alpha1api.ListDatabasesResponse{
				Databases: []v3alpha1api.ListDatabase{{Id: int32(3), Name: "three"}},
				Pagination: v3alpha1api.Pagination{
					Page:       int32(2),
					TotalPages: int32(2),
					Size:       int32(3),
				},
			}, nil
		}

		return &v3alpha1api.ListDatabasesResponse{
			Databases: []v3alpha1api.ListDatabase{},
			Pagination: v3alpha1api.Pagination{
				Page:       int32(3),
				TotalPages: int32(2),
				Size:       int32(3),
			},
		}, nil
	}

	tests := []struct {
		description string
		projectID   string
		region      string
		instanceID  string
		wantErr     bool
		wantDbName  string
		wantDbID    int32
	}{
		{
			description: "Success - Found by name on first page",
			projectID:   "pid", region: "reg", instanceID: "inst",
			wantErr:    false,
			wantDbName: "second",
		},
		{
			description: "Success - Found by id on first page",
			projectID:   "pid", region: "reg", instanceID: "inst",
			wantErr:  false,
			wantDbID: 2,
		},
		{
			description: "Success - Found by name on second page",
			projectID:   "pid", region: "reg", instanceID: "inst",
			wantErr:    false,
			wantDbName: "three",
		},
		{
			description: "Success - Found by id on second page",
			projectID:   "pid", region: "reg", instanceID: "inst",
			wantErr:  false,
			wantDbID: 1,
		},
		{
			description: "Error - API failure",
			projectID:   "pid", region: "reg", instanceID: "inst",
			wantErr: true,
		},
		{
			description: "Error - Missing parameters",
			projectID:   "", region: "reg", instanceID: "inst",
			wantErr: true,
		},
		{
			description: "Error - Search by name not found after all pages",
			projectID:   "pid", region: "reg", instanceID: "inst",
			wantDbName: "non-existent",
			wantErr:    true,
		},
		{
			description: "Error - Search by id not found after all pages",
			projectID:   "pid", region: "reg", instanceID: "inst",
			wantDbID: 999999,
			wantErr:  true,
		},
	}

	for _, tt := range tests {
		t.Run(
			tt.description, func(t *testing.T) {
				var currentPage int32

				mockCall := func(_ v3alpha1api.ApiListDatabasesRequestRequest) (*v3alpha1api.ListDatabasesResponse, error) {
					currentPage++
					return mockResp(currentPage)
				}

				client := &v3alpha1api.DefaultAPIServiceMock{
					ListDatabasesRequestExecuteMock: &mockCall,
				}

				var actual *v3alpha1api.ListDatabase
				var errDB error

				if tt.wantDbName != "" {
					actual, errDB = getDatabaseByName(
						t.Context(),
						client,
						tt.projectID,
						tt.region,
						tt.instanceID,
						tt.wantDbName,
					)
				} else if tt.wantDbID != 0 {
					actual, errDB = getDatabaseById(
						t.Context(),
						client,
						tt.projectID,
						tt.region,
						tt.instanceID,
						int64(tt.wantDbID),
					)
				} else {
					actual, errDB = getDatabase(
						context.Background(),
						client,
						tt.projectID,
						tt.region,
						tt.instanceID,
						func(_ v3alpha1api.ListDatabase) bool { return false },
					)
				}

				if (errDB != nil) != tt.wantErr {
					t.Errorf("getDatabaseByNameOrID() error = %v, wantErr %v", errDB, tt.wantErr)
					return
				}
				if !tt.wantErr && tt.wantDbName != "" && actual != nil {
					if actual.Name != tt.wantDbName {
						t.Errorf("getDatabaseByNameOrID() got name = %v, want %v", actual.Name, tt.wantDbName)
					}
				}

				if !tt.wantErr && tt.wantDbID != 0 && actual != nil {
					if actual.Id != tt.wantDbID {
						t.Errorf("getDatabaseByNameOrID() got id = %v, want %v", actual.Id, tt.wantDbID)
					}
				}
			},
		)
	}
}

func TestCleanString(t *testing.T) {
	testcases := []struct {
		name     string
		given    string
		expected string
	}{
		{
			name:     "should remove quotes",
			given:    "\"quoted\"",
			expected: "quoted",
		},
		{
			name:     "should not change unquoted string",
			given:    "unquoted",
			expected: "unquoted",
		},
	}

	for _, tc := range testcases {
		t.Run(
			tc.name, func(t *testing.T) {
				actual := cleanString(tc.given)
				if diff := cmp.Diff(tc.expected, actual); diff != "" {
					t.Errorf("string mismatch (-want +got):\n%s", diff)
				}
			},
		)
	}
}