package query

import (
	"context"
	"database/sql"
	errs "errors"
	"time"

	sq "github.com/Masterminds/squirrel"

	"github.com/zitadel/zitadel/internal/api/authz"
	"github.com/zitadel/zitadel/internal/api/call"
	"github.com/zitadel/zitadel/internal/domain"
	"github.com/zitadel/zitadel/internal/errors"
	"github.com/zitadel/zitadel/internal/query/projection"
	"github.com/zitadel/zitadel/internal/telemetry/tracing"
)

type PasswordComplexityPolicy struct {
	ID            string
	Sequence      uint64
	CreationDate  time.Time
	ChangeDate    time.Time
	ResourceOwner string
	State         domain.PolicyState

	MinLength    uint64
	HasLowercase bool
	HasUppercase bool
	HasNumber    bool
	HasSymbol    bool

	IsDefault bool
}

func (q *Queries) PasswordComplexityPolicyByOrg(ctx context.Context, shouldTriggerBulk bool, orgID string, withOwnerRemoved bool) (policy *PasswordComplexityPolicy, err error) {
	ctx, span := tracing.NewSpan(ctx)
	defer func() { span.EndWithError(err) }()

	if shouldTriggerBulk {
		ctx = projection.PasswordComplexityProjection.Trigger(ctx)
	}
	eq := sq.Eq{PasswordComplexityColInstanceID.identifier(): authz.GetInstance(ctx).InstanceID()}
	if !withOwnerRemoved {
		eq[PasswordComplexityColOwnerRemoved.identifier()] = false
	}
	stmt, scan := preparePasswordComplexityPolicyQuery(ctx, q.client)
	query, args, err := stmt.Where(
		sq.And{
			eq,
			sq.Or{
				sq.Eq{PasswordComplexityColID.identifier(): orgID},
				sq.Eq{PasswordComplexityColID.identifier(): authz.GetInstance(ctx).InstanceID()},
			},
		}).
		OrderBy(PasswordComplexityColIsDefault.identifier()).
		Limit(1).ToSql()
	if err != nil {
		return nil, errors.ThrowInternal(err, "QUERY-lDnrk", "Errors.Query.SQLStatement")
	}

	err = q.client.QueryRowContext(ctx, func(row *sql.Row) error {
		policy, err = scan(row)
		return err
	}, query, args...)
	return policy, err
}

func (q *Queries) DefaultPasswordComplexityPolicy(ctx context.Context, shouldTriggerBulk bool) (policy *PasswordComplexityPolicy, err error) {
	ctx, span := tracing.NewSpan(ctx)
	defer func() { span.EndWithError(err) }()

	if shouldTriggerBulk {
		ctx = projection.PasswordComplexityProjection.Trigger(ctx)
	}

	stmt, scan := preparePasswordComplexityPolicyQuery(ctx, q.client)
	query, args, err := stmt.Where(sq.Eq{
		PasswordComplexityColID.identifier():         authz.GetInstance(ctx).InstanceID(),
		PasswordComplexityColInstanceID.identifier(): authz.GetInstance(ctx).InstanceID(),
	}).
		OrderBy(PasswordComplexityColIsDefault.identifier()).
		Limit(1).ToSql()
	if err != nil {
		return nil, errors.ThrowInternal(err, "QUERY-h4Uyr", "Errors.Query.SQLStatement")
	}

	err = q.client.QueryRowContext(ctx, func(row *sql.Row) error {
		policy, err = scan(row)
		return err
	}, query, args...)
	return policy, err
}

var (
	passwordComplexityTable = table{
		name:          projection.PasswordComplexityTable,
		instanceIDCol: projection.ComplexityPolicyInstanceIDCol,
	}
	PasswordComplexityColID = Column{
		name:  projection.ComplexityPolicyIDCol,
		table: passwordComplexityTable,
	}
	PasswordComplexityColSequence = Column{
		name:  projection.ComplexityPolicySequenceCol,
		table: passwordComplexityTable,
	}
	PasswordComplexityColCreationDate = Column{
		name:  projection.ComplexityPolicyCreationDateCol,
		table: passwordComplexityTable,
	}
	PasswordComplexityColChangeDate = Column{
		name:  projection.ComplexityPolicyChangeDateCol,
		table: passwordComplexityTable,
	}
	PasswordComplexityColResourceOwner = Column{
		name:  projection.ComplexityPolicyResourceOwnerCol,
		table: passwordComplexityTable,
	}
	PasswordComplexityColInstanceID = Column{
		name:  projection.ComplexityPolicyInstanceIDCol,
		table: passwordComplexityTable,
	}
	PasswordComplexityColMinLength = Column{
		name:  projection.ComplexityPolicyMinLengthCol,
		table: passwordComplexityTable,
	}
	PasswordComplexityColHasLowercase = Column{
		name:  projection.ComplexityPolicyHasLowercaseCol,
		table: passwordComplexityTable,
	}
	PasswordComplexityColHasUpperCase = Column{
		name:  projection.ComplexityPolicyHasUppercaseCol,
		table: passwordComplexityTable,
	}
	PasswordComplexityColHasNumber = Column{
		name:  projection.ComplexityPolicyHasNumberCol,
		table: passwordComplexityTable,
	}
	PasswordComplexityColHasSymbol = Column{
		name:  projection.ComplexityPolicyHasSymbolCol,
		table: passwordComplexityTable,
	}
	PasswordComplexityColIsDefault = Column{
		name:  projection.ComplexityPolicyIsDefaultCol,
		table: passwordComplexityTable,
	}
	PasswordComplexityColState = Column{
		name:  projection.ComplexityPolicyStateCol,
		table: passwordComplexityTable,
	}
	PasswordComplexityColOwnerRemoved = Column{
		name:  projection.ComplexityPolicyOwnerRemovedCol,
		table: passwordComplexityTable,
	}
)

func preparePasswordComplexityPolicyQuery(ctx context.Context, db prepareDatabase) (sq.SelectBuilder, func(*sql.Row) (*PasswordComplexityPolicy, error)) {
	return sq.Select(
			PasswordComplexityColID.identifier(),
			PasswordComplexityColSequence.identifier(),
			PasswordComplexityColCreationDate.identifier(),
			PasswordComplexityColChangeDate.identifier(),
			PasswordComplexityColResourceOwner.identifier(),
			PasswordComplexityColMinLength.identifier(),
			PasswordComplexityColHasLowercase.identifier(),
			PasswordComplexityColHasUpperCase.identifier(),
			PasswordComplexityColHasNumber.identifier(),
			PasswordComplexityColHasSymbol.identifier(),
			PasswordComplexityColIsDefault.identifier(),
			PasswordComplexityColState.identifier(),
		).
			From(passwordComplexityTable.identifier() + db.Timetravel(call.Took(ctx))).
			PlaceholderFormat(sq.Dollar),
		func(row *sql.Row) (*PasswordComplexityPolicy, error) {
			policy := new(PasswordComplexityPolicy)
			err := row.Scan(
				&policy.ID,
				&policy.Sequence,
				&policy.CreationDate,
				&policy.ChangeDate,
				&policy.ResourceOwner,
				&policy.MinLength,
				&policy.HasLowercase,
				&policy.HasUppercase,
				&policy.HasNumber,
				&policy.HasSymbol,
				&policy.IsDefault,
				&policy.State,
			)
			if err != nil {
				if errs.Is(err, sql.ErrNoRows) {
					return nil, errors.ThrowNotFound(err, "QUERY-63mtI", "Errors.PasswordComplexity.NotFound")
				}
				return nil, errors.ThrowInternal(err, "QUERY-uulCZ", "Errors.Internal")
			}
			return policy, nil
		}
}