package query

import (
	"context"
	"queryorchestration/internal/database"
	"queryorchestration/internal/database/repository"
	"queryorchestration/internal/job/collector"
	"queryorchestration/internal/query/result"
	resultprocessor "queryorchestration/internal/query/result/processor"
	"testing"

	"github.com/google/uuid"
	"github.com/jackc/pgx/v5/pgtype"
	"github.com/pashagolub/pgxmock/v3"
	"github.com/stretchr/testify/assert"
)

func TestBatchQueries(t *testing.T) {
	svc := Service{}

	in := []*resultprocessor.Query{}
	out := svc.batchQueries(in)
	assert.ElementsMatch(t, [][]*resultprocessor.Query{}, out)

	in = []*resultprocessor.Query{
		{
			ID: uuid.New(),
		},
	}
	out = svc.batchQueries(in)
	assert.ElementsMatch(t, [][]*resultprocessor.Query{
		{
			in[0],
		},
	}, out)

	in = []*resultprocessor.Query{
		{
			ID:               uuid.New(),
			RequiredQueryIDs: &[]uuid.UUID{uuid.New()},
		},
	}
	out = svc.batchQueries(in)
	assert.ElementsMatch(t, [][]*resultprocessor.Query{
		{
			in[0],
		},
	}, out)

	in = []*resultprocessor.Query{
		{
			ID: uuid.New(),
		},
		{
			ID: uuid.New(),
		},
	}
	out = svc.batchQueries(in)
	assert.ElementsMatch(t, [][]*resultprocessor.Query{
		{
			in[0],
			in[1],
		},
	}, out)

	idone := uuid.New()
	in = []*resultprocessor.Query{
		{
			ID: idone,
		},
		{
			ID: uuid.New(),
			RequiredQueryIDs: &[]uuid.UUID{
				idone,
			},
		},
	}
	out = svc.batchQueries(in)
	assert.ElementsMatch(t, [][]*resultprocessor.Query{
		{
			in[0],
		},
		{
			in[1],
		},
	}, out)

	in = []*resultprocessor.Query{
		{
			ID: uuid.New(),
			RequiredQueryIDs: &[]uuid.UUID{
				idone,
			},
		},
		{
			ID: idone,
		},
	}
	out = svc.batchQueries(in)
	assert.ElementsMatch(t, [][]*resultprocessor.Query{
		{
			in[1],
		},
		{
			in[0],
		},
	}, out)

	in = []*resultprocessor.Query{
		{
			ID: idone,
		},
		{
			ID: uuid.New(),
			RequiredQueryIDs: &[]uuid.UUID{
				idone,
			},
		},
		{
			ID: uuid.New(),
			RequiredQueryIDs: &[]uuid.UUID{
				idone,
			},
		},
		{
			ID: uuid.New(),
		},
	}
	out = svc.batchQueries(in)
	assert.ElementsMatch(t, [][]*resultprocessor.Query{
		{
			in[0],
			in[3],
		},
		{
			in[1],
			in[2],
		},
	}, out)

	idtwo := uuid.New()
	idthree := uuid.New()
	in = []*resultprocessor.Query{
		{
			ID: idone,
		},
		{
			ID: idtwo,
			RequiredQueryIDs: &[]uuid.UUID{
				idone,
			},
		},
		{
			ID: idthree,
			RequiredQueryIDs: &[]uuid.UUID{
				idtwo,
			},
		},
		{
			ID: uuid.New(),
			RequiredQueryIDs: &[]uuid.UUID{
				idthree,
			},
		},
	}
	out = svc.batchQueries(in)
	assert.ElementsMatch(t, [][]*resultprocessor.Query{
		{
			in[0],
		},
		{
			in[1],
		},
		{
			in[2],
		},
		{
			in[3],
		},
	}, out)
}

func TestProcessBatch(t *testing.T) {
	ctx := context.Background()
	pool, err := pgxmock.NewPool()
	if err != nil {
		t.Fatalf("failed to open pgxmock database: %v", err)
	}
	queries := repository.New(pool)
	db := &database.Connection{
		Queries: queries,
		Pool:    pool,
	}
	svc := Service{
		svc: &Services{
			Result: result.New(db),
		},
	}

	assert.Error(t, svc.processBatch(ctx, nil, nil))

	doc := &Document{
		ID:           uuid.New(),
		CleanVersion: 1,
		TextVersion:  1,
	}

	assert.Nil(t, svc.processBatch(ctx, doc, nil))

	qs := []*resultprocessor.Query{}
	assert.Nil(t, svc.processBatch(ctx, doc, qs))

	coll := &collector.Collector{
		ID:              uuid.New(),
		MinCleanVersion: 1,
		MinTextVersion:  1,
	}
	qs = []*resultprocessor.Query{
		{
			ID:      uuid.New(),
			Type:    resultprocessor.TypeContextFull,
			Version: 1,
		},
	}
	pool.ExpectQuery("name: SetResult :one").WithArgs(database.MustToDBUUID(qs[0].ID), database.MustToDBUUID(doc.ID), pgxmock.AnyArg(), coll.MinCleanVersion, coll.MinTextVersion, qs[0].Version).
		WillReturnRows(
			pgxmock.NewRows([]string{"id"}).
				AddRow(pgtype.UUID{}),
		)
	pool.ExpectQuery("name: GetCollectorByJobID :one").WithArgs(database.MustToDBUUID(doc.JobID)).
		WillReturnRows(
			pgxmock.NewRows([]string{"id", "jobId", "minCleanVersion", "minTextVersion", "activeVersion", "latestVersion", "fields"}).
				AddRow(database.MustToDBUUID(coll.ID), database.MustToDBUUID(doc.JobID), coll.MinCleanVersion, coll.MinTextVersion, int32(1), int32(2), []byte("")),
		)
	pool.ExpectQuery("name: ListCollectorQueries :many").WithArgs(database.MustToDBUUID(coll.ID)).
		WillReturnRows(
			pgxmock.NewRows([]string{"collectorId", "queryId", "type", "queryVersion", "requiredIds"}).
				AddRow(database.MustToDBUUID(coll.ID), database.MustToDBUUID(qs[0].ID), repository.QuerytypeContextFull, qs[0].Version, []pgtype.UUID{}),
		)
	assert.Nil(t, svc.processBatch(ctx, doc, qs))
}

func TestSync(t *testing.T) {
	ctx := context.Background()
	pool, err := pgxmock.NewPool()
	if err != nil {
		t.Fatalf("failed to open pgxmock database: %v", err)
	}
	queries := repository.New(pool)
	db := &database.Connection{
		Queries: queries,
		Pool:    pool,
	}
	svc := Service{
		svc: &Services{
			Result: result.New(db),
		},
	}

	assert.Error(t, svc.processBatch(ctx, nil, nil))

	doc := &Document{
		ID:           uuid.New(),
		CleanVersion: 1,
		TextVersion:  1,
	}

	assert.Nil(t, svc.processBatch(ctx, doc, nil))

	qs := []*resultprocessor.Query{}
	assert.Nil(t, svc.processBatch(ctx, doc, qs))

	coll := &collector.Collector{
		ID:              uuid.New(),
		MinCleanVersion: 1,
		MinTextVersion:  1,
	}
	qs = []*resultprocessor.Query{
		{
			ID:      uuid.New(),
			Type:    resultprocessor.TypeContextFull,
			Version: 1,
		},
	}

	pool.ExpectQuery("name: ListUnsyncedQueriesByDocId :many").WithArgs(database.MustToDBUUID(doc.ID)).
		WillReturnRows(
			pgxmock.NewRows([]string{"id", "type", "activeVersion", "latestVersion", "config", "requiredIds"}).
				AddRow(database.MustToDBUUID(qs[0].ID), repository.QuerytypeContextFull, qs[0].Version, qs[0].Version, nil, []pgtype.UUID{}),
		)
	pool.ExpectQuery("name: SetResult :one").WithArgs(database.MustToDBUUID(qs[0].ID), database.MustToDBUUID(doc.ID), pgxmock.AnyArg(), coll.MinCleanVersion, coll.MinTextVersion, qs[0].Version).
		WillReturnRows(
			pgxmock.NewRows([]string{"id"}).
				AddRow(pgtype.UUID{}),
		)
	pool.ExpectQuery("name: GetCollectorByJobID :one").WithArgs(database.MustToDBUUID(doc.JobID)).
		WillReturnRows(
			pgxmock.NewRows([]string{"id", "jobId", "minCleanVersion", "minTextVersion", "activeVersion", "latestVersion", "fields"}).
				AddRow(database.MustToDBUUID(coll.ID), database.MustToDBUUID(doc.JobID), coll.MinCleanVersion, coll.MinTextVersion, int32(1), int32(2), []byte("")),
		)
	pool.ExpectQuery("name: ListCollectorQueries :many").WithArgs(database.MustToDBUUID(coll.ID)).
		WillReturnRows(
			pgxmock.NewRows([]string{"collectorId", "queryId", "type", "queryVersion", "requiredIds"}).
				AddRow(database.MustToDBUUID(coll.ID), database.MustToDBUUID(qs[0].ID), repository.QuerytypeContextFull, qs[0].Version, []pgtype.UUID{}),
		)
	assert.Nil(t, svc.Sync(ctx, doc))
}