// Package database define database operation functions
package database

import (
	"context"
	"database/sql"
	"database/sql/driver"
	"strings"
	"testing"

	"modelRT/constants"
	"modelRT/model"
	modelsql "modelRT/sql"

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

func TestParameterInitializationSQLUsesStationIDAndExcludesItFromComponentAttributes(t *testing.T) {
	dynamicSQL := compactParameterSQL(modelsql.DynamicParameterInitializationRows)
	componentSQL := compactParameterSQL(modelsql.ComponentParameterInitializationRows)

	assert.Contains(t, dynamicSQL, "component.station_id = station.id")
	assert.Contains(t, componentSQL, "component.station_id = station.id")
	assert.Contains(t, componentSQL, "to_jsonb(component) - 'station_id'")
	assert.Contains(t, dynamicSQL, "component.nspath <> ''")
	assert.Contains(t, dynamicSQL, "component.tag <> ''")
	assert.Contains(t, componentSQL, "component.nspath <> ''")
	assert.Contains(t, componentSQL, "component.tag <> ''")
	assert.NotContains(t, strings.ToLower(componentSQL), "component.station = station.tagname")
}

func TestQueryParameterInitializationRecordsJoinsHierarchyAndDynamicTable(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)

	groups := constants.SupportedDynamicParameterAttributeGroups()
	routeArgs := make([]driver.Value, len(groups))
	for index, group := range groups {
		routeArgs[index] = group
	}
	mock.ExpectQuery(`(?s)SELECT name, tag, group_name.*FROM project_manager.*WHERE group_name IN`).
		WithArgs(routeArgs...).
		WillReturnRows(sqlmock.NewRows([]string{"name", "tag", "group_name"}).
			AddRow("cable_cable_demo_base_extend", "cable_demo", "base_extend"))

	mock.ExpectQuery(`(?s)WITH dynamic_rows AS.*FROM public\."cable_cable_demo_base_extend".*FROM public\.grid.*INNER JOIN public\.zone.*INNER JOIN public\.station.*INNER JOIN public\.component.*INNER JOIN public\.project_manager.*jsonb_each`).
		WithArgs("cable_cable_demo_base_extend", "cable_demo", "base_extend").
		WillReturnRows(parameterInitializationRows().
			AddRow(
				"grid000",
				"zone000",
				"station000",
				true,
				"component-uuid",
				"nspath",
				"component",
				"base_extend",
				"vnom_kv",
				"220.0",
				"DOUBLE PRECISION",
				"额定电压",
				int64(1),
				int64(1),
			))

	mock.ExpectQuery(`(?s)SELECT.*FROM public\.grid.*INNER JOIN public\.zone.*INNER JOIN public\.station.*INNER JOIN public\.component.*jsonb_each`).
		WillReturnRows(parameterInitializationRows().
			AddRow(
				"grid000",
				"zone000",
				"station000",
				true,
				"component-uuid",
				"nspath",
				"component",
				"component",
				"description",
				`"组件"`,
				"CHARACTER VARYING(512)",
				"组件名称",
				int64(1),
				int64(1),
			))

	records, err := QueryParameterInitializationRecords(context.Background(), db)
	require.NoError(t, err)
	require.Len(t, records, 2)
	assert.Equal(t, "vnom_kv", records[0].AttributeName)
	assert.Equal(t, "description", records[1].AttributeName)
	require.NoError(t, mock.ExpectationsWereMet())
}

func TestValidateParameterInitializationRoutesRejectsAmbiguousMapping(t *testing.T) {
	routes := []parameterInitializationRoute{
		{TableName: "cable_demo_stable", ModelName: "cable_demo", AttributeGroup: "stable"},
		{TableName: "cable_other_stable", ModelName: "cable_demo", AttributeGroup: "stable"},
	}

	err := validateParameterInitializationRoutes(routes)
	require.Error(t, err)
	assert.Contains(t, err.Error(), "more than one project_manager record")
}

func TestValidateParameterInitializationRecordsEnforcesDescriptionAndRowUniqueness(t *testing.T) {
	validRecord := modelParameterInitializationRecordForTest()

	missingDescription := validRecord
	missingDescription.Description = sql.NullString{}
	missingDescription.DescriptionCount = 0
	err := validateParameterInitializationRecords([]model.ParameterInitializationRecord{missingDescription})
	require.Error(t, err)
	assert.Contains(t, err.Error(), "description not found")

	duplicateRow := validRecord
	duplicateRow.DynamicRecordCount = 2
	err = validateParameterInitializationRecords([]model.ParameterInitializationRecord{duplicateRow})
	require.Error(t, err)
	assert.Contains(t, err.Error(), "has 2")
}

func parameterInitializationRows() *sqlmock.Rows {
	return sqlmock.NewRows([]string{
		"grid_tag",
		"zone_tag",
		"station_tag",
		"station_is_local",
		"component_uuid",
		"component_nspath",
		"component_tag",
		"attribute_group",
		"attribute_name",
		"attribute_value",
		"attribute_type",
		"description",
		"description_count",
		"dynamic_record_count",
	})
}

func modelParameterInitializationRecordForTest() model.ParameterInitializationRecord {
	return model.ParameterInitializationRecord{
		ComponentTag:       "component",
		AttributeGroup:     "stable",
		AttributeName:      "attribute",
		AttributeType:      "INTEGER",
		Description:        sql.NullString{String: "属性", Valid: true},
		DescriptionCount:   1,
		DynamicRecordCount: 1,
	}
}