package database

import (
	"context"
	"regexp"
	"testing"

	"modelRT/common"
	"modelRT/orm"

	"github.com/DATA-DOG/go-sqlmock"
	"github.com/gofrs/uuid"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"gorm.io/driver/postgres"
	"gorm.io/gorm"
)

func TestBuildParameterComponentQuery(t *testing.T) {
	tests := []struct {
		name      string
		token     string
		wantArgs  []any
		wantWhere string
		wantErr   bool
	}{
		{
			name:      "seven-part parameter",
			token:     "grid.zone.station.nspath.component.stable.attribute",
			wantArgs:  []any{"grid", "zone", "station", "nspath", "component"},
			wantWhere: "WHERE g.tagname = ?",
		},
		{
			name:      "four-part local parameter",
			token:     "nspath.component.rated.attribute",
			wantArgs:  []any{"nspath", "component"},
			wantWhere: "s.is_local = TRUE",
		},
		{
			name:    "measurement token",
			token:   "nspath.component.bay.measurement",
			wantErr: true,
		},
		{
			name:    "empty segment",
			token:   "nspath..stable.attribute",
			wantErr: true,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			query, args, _, err := buildParameterComponentQuery(tt.token)
			if tt.wantErr {
				require.Error(t, err)
				assert.ErrorIs(t, err, common.ErrInvalidParameterToken)
				return
			}

			require.NoError(t, err)
			assert.Contains(t, query, "INNER JOIN station AS s ON s.id = c.station_id")
			assert.Contains(t, query, tt.wantWhere)
			assert.Equal(t, tt.wantArgs, args)
			assert.NotContains(t, query, "\n")
			assert.NotContains(t, query, "\t")
		})
	}
}

func TestQueryParameterByDataObjectToken(t *testing.T) {
	sqlDB, mock, err := sqlmock.New()
	require.NoError(t, err)
	t.Cleanup(func() { _ = sqlDB.Close() })

	db, err := gorm.Open(postgres.New(postgres.Config{Conn: sqlDB}), &gorm.Config{})
	require.NoError(t, err)

	const (
		token         = "grid.zone.station.nspath.component.stable.rated_voltage"
		componentUUID = "70c190f2-8a60-42a9-b143-ec5f87e0aa6b"
	)

	mock.ExpectQuery(`(?s)SELECT c\.\*.*WHERE g\.tagname = \$1.*AND c\.tag = \$5.*LIMIT 2`).
		WithArgs("grid", "zone", "station", "nspath", "component").
		WillReturnRows(sqlmock.NewRows([]string{
			"global_uuid", "nspath", "tag", "model_name", "station_id",
		}).AddRow(componentUUID, "nspath", "component", "bus_1", int64(10)))

	mock.ExpectQuery(`SELECT \* FROM "project_manager" WHERE tag = \$1 AND group_name = \$2 LIMIT \$3`).
		WithArgs("bus_1", "stable", 2).
		WillReturnRows(sqlmock.NewRows([]string{
			"id", "name", "tag", "meta_model", "group_name", "link_type", "check_state", "ispublic",
		}).AddRow(
			int32(1),
			"bus_bus_1_stable",
			"bus_1",
			"bus",
			"stable",
			int32(0),
			`{"checkState":[{"name":"rated_voltage","checked":1}]}`,
			false,
		))

	mock.ExpectQuery(`(?s)SELECT pg_catalog\.format_type.*pg_catalog\.pg_attribute.*c\.relname = \$1.*a\.attname = \$2.*LIMIT 1`).
		WithArgs("bus_bus_1_stable", "rated_voltage").
		WillReturnRows(sqlmock.NewRows([]string{"format_type"}).AddRow("double precision"))

	mock.ExpectQuery(regexp.QuoteMeta(`SELECT count(*) FROM "bus_bus_1_stable" WHERE global_uuid = $1 AND attribute_group = $2`)).
		WithArgs(componentUUID, "stable").
		WillReturnRows(sqlmock.NewRows([]string{"count"}).AddRow(int64(1)))

	parameter, err := QueryParameterByDataObjectToken(context.Background(), db, token)
	require.NoError(t, err)
	assert.Equal(t, "component", parameter.Component.Tag)
	assert.Equal(t, "bus_bus_1_stable", parameter.Project.Name)
	assert.Equal(t, "bus_bus_1_stable", parameter.TableName)
	assert.Equal(t, "stable", parameter.AttributeGroup)
	assert.Equal(t, "rated_voltage", parameter.AttributeName)
	assert.Equal(t, "DOUBLE PRECISION", parameter.AttributeType)
	require.NoError(t, mock.ExpectationsWereMet())
}

func TestQueryParameterDataObjectValue(t *testing.T) {
	sqlDB, mock, err := sqlmock.New()
	require.NoError(t, err)
	t.Cleanup(func() { _ = sqlDB.Close() })

	db, err := gorm.Open(postgres.New(postgres.Config{Conn: sqlDB}), &gorm.Config{})
	require.NoError(t, err)

	const componentUUID = "70c190f2-8a60-42a9-b143-ec5f87e0aa6b"
	parsedUUID, err := uuid.FromString(componentUUID)
	require.NoError(t, err)
	parameter := &ParameterDataObject{
		Component: orm.Component{GlobalUUID: parsedUUID},
		Project: orm.ProjectManager{
			Name: "bus_bus_1_stable",
		},
		TableName:      "bus_bus_1_stable",
		AttributeGroup: "stable",
		AttributeName:  "rated_voltage",
	}

	mock.ExpectQuery(regexp.QuoteMeta(`SELECT * FROM "bus_bus_1_stable" WHERE global_uuid = $1 AND attribute_group = $2 LIMIT $3`)).
		WithArgs(componentUUID, "stable", 1).
		WillReturnRows(sqlmock.NewRows([]string{
			"global_uuid", "attribute_group", "rated_voltage",
		}).AddRow(componentUUID, "stable", float64(220)))

	value, err := QueryParameterDataObjectValue(context.Background(), db, parameter)
	require.NoError(t, err)
	assert.Equal(t, float64(220), value)
	require.NoError(t, mock.ExpectationsWereMet())
}

func TestQueryComponentParameterByDataObjectToken(t *testing.T) {
	sqlDB, mock, err := sqlmock.New()
	require.NoError(t, err)
	t.Cleanup(func() { _ = sqlDB.Close() })

	db, err := gorm.Open(postgres.New(postgres.Config{Conn: sqlDB}), &gorm.Config{})
	require.NoError(t, err)

	const (
		token         = "grid.zone.station.nspath.component.component.description"
		componentUUID = "70c190f2-8a60-42a9-b143-ec5f87e0aa6b"
	)
	mock.ExpectQuery(`(?s)SELECT c\.\*.*WHERE g\.tagname = \$1.*AND c\.tag = \$5.*LIMIT 2`).
		WithArgs("grid", "zone", "station", "nspath", "component").
		WillReturnRows(sqlmock.NewRows([]string{
			"global_uuid", "nspath", "tag", "model_name", "grid", "zone", "station", "station_id",
		}).AddRow(componentUUID, "nspath", "component", "bus_1", "grid", "zone", "station", int64(10)))
	mock.ExpectQuery(`(?s)SELECT pg_catalog\.format_type.*c\.relname = \$1.*a\.attname = \$2.*LIMIT 1`).
		WithArgs("component", "description").
		WillReturnRows(sqlmock.NewRows([]string{"format_type"}).AddRow("character varying(512)"))

	parameter, err := QueryParameterByDataObjectToken(context.Background(), db, token)
	require.NoError(t, err)
	assert.Equal(t, "component", parameter.TableName)
	assert.Equal(t, "component", parameter.AttributeGroup)
	assert.Equal(t, "description", parameter.AttributeName)
	assert.Equal(t, "CHARACTER VARYING(512)", parameter.AttributeType)
	assert.Empty(t, parameter.Project.Name)
	require.NoError(t, mock.ExpectationsWereMet())
}

func TestQueryComponentParameterValue(t *testing.T) {
	sqlDB, mock, err := sqlmock.New()
	require.NoError(t, err)
	t.Cleanup(func() { _ = sqlDB.Close() })

	db, err := gorm.Open(postgres.New(postgres.Config{Conn: sqlDB}), &gorm.Config{})
	require.NoError(t, err)

	parameter := &ParameterDataObject{
		Component:      orm.Component{Tag: "component"},
		TableName:      "component",
		AttributeGroup: "component",
		AttributeName:  "description",
	}
	mock.ExpectQuery(regexp.QuoteMeta(`SELECT * FROM "component" WHERE tag = $1 LIMIT $2`)).
		WithArgs("component", 1).
		WillReturnRows(sqlmock.NewRows([]string{"tag", "description"}).AddRow("component", "测试组件"))

	value, err := QueryParameterDataObjectValue(context.Background(), db, parameter)
	require.NoError(t, err)
	assert.Equal(t, "测试组件", value)
	require.NoError(t, mock.ExpectationsWereMet())
}

func TestQueryParameterAttributeDescription(t *testing.T) {
	sqlDB, mock, err := sqlmock.New()
	require.NoError(t, err)
	t.Cleanup(func() { _ = sqlDB.Close() })

	db, err := gorm.Open(postgres.New(postgres.Config{Conn: sqlDB}), &gorm.Config{})
	require.NoError(t, err)

	mock.ExpectQuery(`(?s)SELECT attribute_name.*FROM basic\.attribute.*WHERE attribute = \$1.*LIMIT 2`).
		WithArgs("rated_voltage").
		WillReturnRows(sqlmock.NewRows([]string{"attribute_name"}).AddRow("额定电压"))

	description, err := QueryParameterAttributeDescription(context.Background(), db, "rated_voltage")
	require.NoError(t, err)
	assert.Equal(t, "额定电压", description)
	require.NoError(t, mock.ExpectationsWereMet())
}

func TestQueryParameterByDataObjectTokenComponentNotFound(t *testing.T) {
	sqlDB, mock, err := sqlmock.New()
	require.NoError(t, err)
	t.Cleanup(func() { _ = sqlDB.Close() })

	db, err := gorm.Open(postgres.New(postgres.Config{Conn: sqlDB}), &gorm.Config{})
	require.NoError(t, err)

	mock.ExpectQuery(`(?s)SELECT c\.\*.*WHERE c\.nspath = \$1.*AND c\.tag = \$2.*s\.is_local = TRUE.*LIMIT 2`).
		WithArgs("nspath", "component").
		WillReturnRows(sqlmock.NewRows([]string{"global_uuid"}))

	_, err = QueryParameterByDataObjectToken(
		context.Background(),
		db,
		"nspath.component.stable.rated_voltage",
	)
	require.Error(t, err)
	assert.ErrorIs(t, err, common.ErrParameterTokenNotFound)
	require.NoError(t, mock.ExpectationsWereMet())
}