package telemetrylogs

import (
	"context"
	"testing"
	"time"

	"github.com/SigNoz/signoz/pkg/instrumentation/instrumentationtest"
	"github.com/SigNoz/signoz/pkg/querybuilder"
	"github.com/SigNoz/signoz/pkg/querybuilder/resourcefilter"
	qbtypes "github.com/SigNoz/signoz/pkg/types/querybuildertypes/querybuildertypesv5"
	"github.com/SigNoz/signoz/pkg/types/telemetrytypes"
	"github.com/SigNoz/signoz/pkg/types/telemetrytypes/telemetrytypestest"
	"github.com/stretchr/testify/require"
)

func resourceFilterStmtBuilder() qbtypes.StatementBuilder[qbtypes.LogAggregation] {
	fm := resourcefilter.NewFieldMapper()
	cb := resourcefilter.NewConditionBuilder(fm)
	mockMetadataStore := telemetrytypestest.NewMockMetadataStore()
	keysMap := buildCompleteFieldKeyMap()
	for _, keys := range keysMap {
		for _, key := range keys {
			key.Signal = telemetrytypes.SignalLogs
		}
	}
	mockMetadataStore.KeysMap = keysMap

	return resourcefilter.NewLogResourceFilterStatementBuilder(
		fm,
		cb,
		mockMetadataStore,
		DefaultFullTextColumn,
		BodyJSONStringSearchPrefix,
		GetBodyJSONKey,
	)
}

func TestStatementBuilderTimeSeries(t *testing.T) {
	cases := []struct {
		name        string
		requestType qbtypes.RequestType
		query       qbtypes.QueryBuilderQuery[qbtypes.LogAggregation]
		expected    qbtypes.Statement
		expectedErr error
	}{
		{
			name:        "Time series with limit",
			requestType: qbtypes.RequestTypeTimeSeries,
			query: qbtypes.QueryBuilderQuery[qbtypes.LogAggregation]{
				Signal:       telemetrytypes.SignalLogs,
				StepInterval: qbtypes.Step{Duration: 30 * time.Second},
				Aggregations: []qbtypes.LogAggregation{
					{
						Expression: "count()",
					},
				},
				Filter: &qbtypes.Filter{
					Expression: "service.name = 'cartservice'",
				},
				Limit: 10,
				GroupBy: []qbtypes.GroupByKey{
					{
						TelemetryFieldKey: telemetrytypes.TelemetryFieldKey{
							Name: "service.name",
						},
					},
				},
			},
			expected: qbtypes.Statement{
				Query: "WITH __resource_filter AS (SELECT fingerprint FROM signoz_logs.distributed_logs_v2_resource WHERE (simpleJSONExtractString(labels, 'service.name') = ? AND labels LIKE ? AND labels LIKE ?) AND seen_at_ts_bucket_start >= ? AND seen_at_ts_bucket_start <= ?), __limit_cte AS (SELECT toString(multiIf(mapContains(resources_string, 'service.name') = ?, resources_string['service.name'], NULL)) AS `service.name`, count() AS __result_0 FROM signoz_logs.distributed_logs_v2 WHERE resource_fingerprint GLOBAL IN (SELECT fingerprint FROM __resource_filter) AND true AND timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? GROUP BY `service.name` ORDER BY __result_0 DESC LIMIT ?) SELECT toStartOfInterval(fromUnixTimestamp64Nano(timestamp), INTERVAL 30 SECOND) AS ts, toString(multiIf(mapContains(resources_string, 'service.name') = ?, resources_string['service.name'], NULL)) AS `service.name`, count() AS __result_0 FROM signoz_logs.distributed_logs_v2 WHERE resource_fingerprint GLOBAL IN (SELECT fingerprint FROM __resource_filter) AND true AND timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? AND (`service.name`) GLOBAL IN (SELECT `service.name` FROM __limit_cte) GROUP BY ts, `service.name`",
				Args:  []any{"cartservice", "%service.name%", "%service.name%cartservice%", uint64(1747945619), uint64(1747983448), true, "1747947419000000000", "1747983448000000000", uint64(1747945619), uint64(1747983448), 10, true, "1747947419000000000", "1747983448000000000", uint64(1747945619), uint64(1747983448)},
			},
			expectedErr: nil,
		},
		{
			name:        "Time series with limit + custom order by",
			requestType: qbtypes.RequestTypeTimeSeries,
			query: qbtypes.QueryBuilderQuery[qbtypes.LogAggregation]{
				Signal:       telemetrytypes.SignalLogs,
				StepInterval: qbtypes.Step{Duration: 30 * time.Second},
				Aggregations: []qbtypes.LogAggregation{
					{
						Expression: "count()",
					},
				},
				Filter: &qbtypes.Filter{
					Expression: "service.name = 'cartservice'",
				},
				Limit: 10,
				GroupBy: []qbtypes.GroupByKey{
					{
						TelemetryFieldKey: telemetrytypes.TelemetryFieldKey{
							Name: "service.name",
						},
					},
				},
				Order: []qbtypes.OrderBy{
					{
						Key: qbtypes.OrderByKey{
							TelemetryFieldKey: telemetrytypes.TelemetryFieldKey{
								Name: "service.name",
							},
						},
						Direction: qbtypes.OrderDirectionDesc,
					},
				},
			},
			expected: qbtypes.Statement{
				Query: "WITH __resource_filter AS (SELECT fingerprint FROM signoz_logs.distributed_logs_v2_resource WHERE (simpleJSONExtractString(labels, 'service.name') = ? AND labels LIKE ? AND labels LIKE ?) AND seen_at_ts_bucket_start >= ? AND seen_at_ts_bucket_start <= ?), __limit_cte AS (SELECT toString(multiIf(mapContains(resources_string, 'service.name') = ?, resources_string['service.name'], NULL)) AS `service.name`, count() AS __result_0 FROM signoz_logs.distributed_logs_v2 WHERE resource_fingerprint GLOBAL IN (SELECT fingerprint FROM __resource_filter) AND true AND timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? GROUP BY `service.name` ORDER BY `service.name` desc LIMIT ?) SELECT toStartOfInterval(fromUnixTimestamp64Nano(timestamp), INTERVAL 30 SECOND) AS ts, toString(multiIf(mapContains(resources_string, 'service.name') = ?, resources_string['service.name'], NULL)) AS `service.name`, count() AS __result_0 FROM signoz_logs.distributed_logs_v2 WHERE resource_fingerprint GLOBAL IN (SELECT fingerprint FROM __resource_filter) AND true AND timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? AND (`service.name`) GLOBAL IN (SELECT `service.name` FROM __limit_cte) GROUP BY ts, `service.name`",
				Args:  []any{"cartservice", "%service.name%", "%service.name%cartservice%", uint64(1747945619), uint64(1747983448), true, "1747947419000000000", "1747983448000000000", uint64(1747945619), uint64(1747983448), 10, true, "1747947419000000000", "1747983448000000000", uint64(1747945619), uint64(1747983448)},
			},
			expectedErr: nil,
		},
	}

	fm := NewFieldMapper()
	cb := NewConditionBuilder(fm)
	mockMetadataStore := telemetrytypestest.NewMockMetadataStore()
	mockMetadataStore.KeysMap = buildCompleteFieldKeyMap()

	aggExprRewriter := querybuilder.NewAggExprRewriter(nil, fm, cb, "", nil)

	resourceFilterStmtBuilder := resourceFilterStmtBuilder()

	statementBuilder := NewLogQueryStatementBuilder(
		instrumentationtest.New().ToProviderSettings(),
		mockMetadataStore,
		fm,
		cb,
		resourceFilterStmtBuilder,
		aggExprRewriter,
		DefaultFullTextColumn,
		BodyJSONStringSearchPrefix,
		GetBodyJSONKey,
	)

	for _, c := range cases {
		t.Run(c.name, func(t *testing.T) {

			q, err := statementBuilder.Build(context.Background(), 1747947419000, 1747983448000, c.requestType, c.query, nil)

			if c.expectedErr != nil {
				require.Error(t, err)
				require.Contains(t, err.Error(), c.expectedErr.Error())
			} else {
				require.NoError(t, err)
				require.Equal(t, c.expected.Query, q.Query)
				require.Equal(t, c.expected.Args, q.Args)
				require.Equal(t, c.expected.Warnings, q.Warnings)
			}
		})
	}
}

func TestStatementBuilderListQuery(t *testing.T) {
	cases := []struct {
		name        string
		requestType qbtypes.RequestType
		query       qbtypes.QueryBuilderQuery[qbtypes.LogAggregation]
		expected    qbtypes.Statement
		expectedErr error
	}{
		{
			name:        "default list",
			requestType: qbtypes.RequestTypeRaw,
			query: qbtypes.QueryBuilderQuery[qbtypes.LogAggregation]{
				Signal: telemetrytypes.SignalLogs,
				Filter: &qbtypes.Filter{
					Expression: "service.name = 'cartservice'",
				},
				Limit: 10,
			},
			expected: qbtypes.Statement{
				Query: "WITH __resource_filter AS (SELECT fingerprint FROM signoz_logs.distributed_logs_v2_resource WHERE (simpleJSONExtractString(labels, 'service.name') = ? AND labels LIKE ? AND labels LIKE ?) AND seen_at_ts_bucket_start >= ? AND seen_at_ts_bucket_start <= ?) SELECT timestamp, id, trace_id, span_id, trace_flags, severity_text, severity_number, scope_name, scope_version, body, attributes_string, attributes_number, attributes_bool, resources_string, scope_string FROM signoz_logs.distributed_logs_v2 WHERE resource_fingerprint GLOBAL IN (SELECT fingerprint FROM __resource_filter) AND true AND timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? LIMIT ?",
				Args:  []any{"cartservice", "%service.name%", "%service.name%cartservice%", uint64(1747945619), uint64(1747983448), "1747947419000000000", "1747983448000000000", uint64(1747945619), uint64(1747983448), 10},
			},
			expectedErr: nil,
		},
		{
			name:        "list query with mat col order by",
			requestType: qbtypes.RequestTypeRaw,
			query: qbtypes.QueryBuilderQuery[qbtypes.LogAggregation]{
				Signal: telemetrytypes.SignalLogs,
				Filter: &qbtypes.Filter{
					Expression: "service.name = 'cartservice'",
				},
				Limit: 10,
				Order: []qbtypes.OrderBy{
					{
						Key: qbtypes.OrderByKey{
							TelemetryFieldKey: telemetrytypes.TelemetryFieldKey{
								Name:          "materialized.key.name",
								FieldContext:  telemetrytypes.FieldContextAttribute,
								FieldDataType: telemetrytypes.FieldDataTypeString,
							},
						},
						Direction: qbtypes.OrderDirectionDesc,
					},
				},
			},
			expected: qbtypes.Statement{
				Query: "WITH __resource_filter AS (SELECT fingerprint FROM signoz_logs.distributed_logs_v2_resource WHERE (simpleJSONExtractString(labels, 'service.name') = ? AND labels LIKE ? AND labels LIKE ?) AND seen_at_ts_bucket_start >= ? AND seen_at_ts_bucket_start <= ?) SELECT timestamp, id, trace_id, span_id, trace_flags, severity_text, severity_number, scope_name, scope_version, body, attributes_string, attributes_number, attributes_bool, resources_string, scope_string FROM signoz_logs.distributed_logs_v2 WHERE resource_fingerprint GLOBAL IN (SELECT fingerprint FROM __resource_filter) AND true AND timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? ORDER BY `attribute_string_materialized$$key$$name` AS `materialized.key.name` desc LIMIT ?",
				Args:  []any{"cartservice", "%service.name%", "%service.name%cartservice%", uint64(1747945619), uint64(1747983448), "1747947419000000000", "1747983448000000000", uint64(1747945619), uint64(1747983448), 10},
			},
			expectedErr: nil,
		},
	}

	fm := NewFieldMapper()
	cb := NewConditionBuilder(fm)
	mockMetadataStore := telemetrytypestest.NewMockMetadataStore()
	mockMetadataStore.KeysMap = buildCompleteFieldKeyMap()

	aggExprRewriter := querybuilder.NewAggExprRewriter(nil, fm, cb, "", nil)

	resourceFilterStmtBuilder := resourceFilterStmtBuilder()

	statementBuilder := NewLogQueryStatementBuilder(
		instrumentationtest.New().ToProviderSettings(),
		mockMetadataStore,
		fm,
		cb,
		resourceFilterStmtBuilder,
		aggExprRewriter,
		DefaultFullTextColumn,
		BodyJSONStringSearchPrefix,
		GetBodyJSONKey,
	)

	for _, c := range cases {
		t.Run(c.name, func(t *testing.T) {

			q, err := statementBuilder.Build(context.Background(), 1747947419000, 1747983448000, c.requestType, c.query, nil)

			if c.expectedErr != nil {
				require.Error(t, err)
				require.Contains(t, err.Error(), c.expectedErr.Error())
			} else {
				require.NoError(t, err)
				require.Equal(t, c.expected.Query, q.Query)
				require.Equal(t, c.expected.Args, q.Args)
				require.Equal(t, c.expected.Warnings, q.Warnings)
			}
		})
	}
}