package tests

import (
	"context"
	"database/sql/driver"
	"fmt"
	"math/rand"
	"testing"

	"github.com/stretchr/testify/require"

	"github.com/ClickHouse/clickhouse-go/v2"
	"github.com/paulmach/orb"
	"github.com/stretchr/testify/assert"
)

func TestGeoPoint(t *testing.T) {
	TestProtocols(t, func(t *testing.T, protocol clickhouse.Protocol) {
		conn, err := GetNativeConnection(t, protocol, clickhouse.Settings{
			"allow_experimental_geo_types": 1,
		}, nil, &clickhouse.Compression{
			Method: clickhouse.CompressionLZ4,
		})
		ctx := context.Background()
		require.NoError(t, err)
		if !CheckMinServerServerVersion(conn, 21, 12, 0) {
			t.Skip(fmt.Errorf("unsupported clickhouse version"))
			return
		}
		const ddl = `
		CREATE TABLE test_geo_point (
			Col1 Point
			, Col2 Array(Point)
		) Engine MergeTree() ORDER BY tuple()
		`
		defer func() {
			conn.Exec(ctx, "DROP TABLE IF EXISTS test_geo_point")
		}()
		require.NoError(t, conn.Exec(ctx, ddl))
		batch, err := conn.PrepareBatch(ctx, "INSERT INTO test_geo_point")
		require.NoError(t, err)
		require.NoError(t, batch.Append(
			orb.Point{11, 22},
			[]orb.Point{
				{1, 2},
				{3, 4},
			},
		))
		require.NoError(t, batch.Send())
		var (
			col1 orb.Point
			col2 []orb.Point
		)
		require.NoError(t, conn.QueryRow(ctx, "SELECT * FROM test_geo_point").Scan(&col1, &col2))
		assert.Equal(t, orb.Point{11, 22}, col1)
		assert.Equal(t, []orb.Point{
			{1, 2},
			{3, 4},
		}, col2)
	})
}

func TestGeoPointFlush(t *testing.T) {
	TestProtocols(t, func(t *testing.T, protocol clickhouse.Protocol) {
		conn, err := GetNativeConnection(t, protocol, clickhouse.Settings{
			"allow_experimental_geo_types": 1,
		}, nil, &clickhouse.Compression{
			Method: clickhouse.CompressionLZ4,
		})
		ctx := context.Background()
		require.NoError(t, err)
		if !CheckMinServerServerVersion(conn, 21, 12, 0) {
			t.Skip(fmt.Errorf("unsupported clickhouse version"))
			return
		}
		const ddl = `
		CREATE TABLE test_geo_point_flush (
			  Col1 Point
		) Engine MergeTree() ORDER BY tuple()
		`
		defer func() {
			conn.Exec(ctx, "DROP TABLE IF EXISTS test_geo_point_flush")
		}()
		require.NoError(t, conn.Exec(ctx, ddl))
		batch, err := conn.PrepareBatch(ctx, "INSERT INTO test_geo_point_flush")
		require.NoError(t, err)
		vals := [1000]orb.Point{}
		for i := 0; i < 1000; i++ {
			vals[i] = orb.Point{rand.Float64(), rand.Float64()}
			require.NoError(t, batch.Append(vals[i]))
			require.NoError(t, batch.Flush())
		}
		require.NoError(t, batch.Send())
		rows, err := conn.Query(ctx, "SELECT * FROM test_geo_point_flush")
		require.NoError(t, err)
		i := 0
		for rows.Next() {
			var col1 orb.Point
			require.NoError(t, rows.Scan(&col1))
			require.Equal(t, vals[i], col1)
			i += 1
		}
		require.NoError(t, rows.Close())
		require.NoError(t, rows.Err())
		require.Equal(t, 1000, i)
	})
}

type testPointSerializer struct {
	val orb.Point
}

func (c testPointSerializer) Value() (driver.Value, error) {
	return c.val, nil
}

func (c *testPointSerializer) Scan(src any) error {
	if t, ok := src.(orb.Point); ok {
		*c = testPointSerializer{val: t}
		return nil
	}
	return fmt.Errorf("cannot scan %T into testPointSerializer", src)
}

func TestGeoPointValuer(t *testing.T) {
	TestProtocols(t, func(t *testing.T, protocol clickhouse.Protocol) {
		conn, err := GetNativeConnection(t, protocol, clickhouse.Settings{
			"allow_experimental_geo_types": 1,
		}, nil, &clickhouse.Compression{
			Method: clickhouse.CompressionLZ4,
		})
		ctx := context.Background()
		require.NoError(t, err)
		if !CheckMinServerServerVersion(conn, 21, 12, 0) {
			t.Skip(fmt.Errorf("unsupported clickhouse version"))
			return
		}
		const ddl = `
		CREATE TABLE test_geo_point_flush (
			  Col1 Point
		) Engine MergeTree() ORDER BY tuple()
		`
		defer func() {
			conn.Exec(ctx, "DROP TABLE IF EXISTS test_geo_point_flush")
		}()
		require.NoError(t, conn.Exec(ctx, ddl))
		batch, err := conn.PrepareBatch(ctx, "INSERT INTO test_geo_point_flush")
		require.NoError(t, err)
		vals := [1000]orb.Point{}
		for i := 0; i < 1000; i++ {
			vals[i] = orb.Point{rand.Float64(), rand.Float64()}
			require.NoError(t, batch.Append(testPointSerializer{val: vals[i]}))
			require.NoError(t, batch.Flush())
		}
		require.NoError(t, batch.Send())
		rows, err := conn.Query(ctx, "SELECT * FROM test_geo_point_flush")
		require.NoError(t, err)
		i := 0
		for rows.Next() {
			var col1 orb.Point
			require.NoError(t, rows.Scan(&col1))
			require.Equal(t, vals[i], col1)
			i += 1
		}
		require.NoError(t, rows.Close())
		require.NoError(t, rows.Err())
		require.Equal(t, 1000, i)
	})
}