// Copyright (c) 2025-2026 Probo Inc <hello@getprobo.com>.
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.

package coredata

import (
	"context"
	"fmt"
	"maps"
	"time"

	"github.com/jackc/pgx/v5"
	"go.gearno.de/kit/pg"
	"go.probo.inc/probo/pkg/gid"
)

type (
	ControlMeasure struct {
		ControlID      gid.GID      `db:"control_id"`
		MeasureID      gid.GID      `db:"measure_id"`
		OrganizationID gid.GID      `db:"organization_id"`
		TenantID       gid.TenantID `db:"tenant_id"`
		CreatedAt      time.Time    `db:"created_at"`
	}

	ControlMeasures []*ControlMeasure
)

func (cm ControlMeasure) Upsert(
	ctx context.Context,
	conn pg.Querier,
	scope Scoper,
) error {
	q := `
INSERT INTO
    controls_measures (
        control_id,
        measure_id,
        organization_id,
        tenant_id,
        created_at
    )
VALUES (
    @control_id,
    @measure_id,
    @organization_id,
    @tenant_id,
    @created_at
)
ON CONFLICT (control_id, measure_id) DO NOTHING;
`

	args := pgx.StrictNamedArgs{
		"control_id":      cm.ControlID,
		"measure_id":      cm.MeasureID,
		"organization_id": cm.OrganizationID,
		"tenant_id":       scope.GetTenantID(),
		"created_at":      cm.CreatedAt,
	}
	_, err := conn.Exec(ctx, q, args)
	return err
}

func (cm ControlMeasure) Delete(
	ctx context.Context,
	conn pg.Tx,
	scope Scoper,
	controlID gid.GID,
	measureID gid.GID,
) error {
	q := `
DELETE
FROM
    controls_measures
WHERE
    %s
    AND control_id = @control_id
    AND measure_id = @measure_id;
`

	args := pgx.StrictNamedArgs{
		"control_id": controlID,
		"measure_id": measureID,
	}
	maps.Copy(args, scope.SQLArguments())
	q = fmt.Sprintf(q, scope.SQLFragment())

	_, err := conn.Exec(ctx, q, args)
	return err
}

type ControlWithRisk struct {
	ControlID gid.GID `db:"control_id"`
}

type ControlsWithRisk []*ControlWithRisk

func (cwrs *ControlsWithRisk) LoadByControlIDs(
	ctx context.Context,
	conn pg.Querier,
	scope Scoper,
	controlIDs []gid.GID,
) error {
	q := `
WITH control_risks_via_measures AS (
	SELECT DISTINCT
		cm.control_id,
		rm.risk_id,
		r.tenant_id
	FROM
		controls_measures cm
	INNER JOIN
		risks_measures rm ON cm.measure_id = rm.measure_id
	INNER JOIN
		risks r ON rm.risk_id = r.id
	WHERE
		cm.control_id = ANY(@control_ids)
),
control_risks_via_documents AS (
	SELECT DISTINCT
		cd.control_id,
		rd.risk_id,
		r.tenant_id
	FROM
		controls_documents cd
	INNER JOIN
		risks_documents rd ON cd.document_id = rd.document_id
	INNER JOIN
		risks r ON rd.risk_id = r.id
	WHERE
		cd.control_id = ANY(@control_ids)
),
control_risks AS (
	SELECT control_id, risk_id, tenant_id FROM control_risks_via_measures
	UNION
	SELECT control_id, risk_id, tenant_id FROM control_risks_via_documents
)
SELECT DISTINCT
	control_id
FROM
	control_risks
WHERE
	%s
`
	q = fmt.Sprintf(q, scope.SQLFragment())

	args := pgx.NamedArgs{"control_ids": controlIDs}
	maps.Copy(args, scope.SQLArguments())

	rows, err := conn.Query(ctx, q, args)
	if err != nil {
		return fmt.Errorf("cannot query control risks: %w", err)
	}

	controlsWithRisk, err := pgx.CollectRows(rows, pgx.RowToAddrOfStructByName[ControlWithRisk])
	if err != nil {
		return fmt.Errorf("cannot collect control risks: %w", err)
	}

	*cwrs = controlsWithRisk
	return nil
}