// Copyright (c) 2025-2026 Probo Inc <hello@probo.com>.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

package coredata

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

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

type (
	Audit struct {
		ID                         gid.GID                    `db:"id"`
		Name                       *string                    `db:"name"`
		OrganizationID             gid.GID                    `db:"organization_id"`
		FrameworkID                gid.GID                    `db:"framework_id"`
		ReportFileID               *gid.GID                   `db:"report_file_id"`
		ValidFrom                  *time.Time                 `db:"valid_from"`
		ValidUntil                 *time.Time                 `db:"valid_until"`
		AuditStartDate             *time.Time                 `db:"audit_start_date"`
		AuditEndDate               *time.Time                 `db:"audit_end_date"`
		State                      AuditState                 `db:"state"`
		CompliancePortalVisibility CompliancePortalVisibility `db:"trust_center_visibility"`
		CreatedAt                  time.Time                  `db:"created_at"`
		UpdatedAt                  time.Time                  `db:"updated_at"`
	}

	Audits []*Audit
)

func (a *Audit) CursorKey(field AuditOrderField) page.CursorKey {
	switch field {
	case AuditOrderFieldCreatedAt:
		return page.NewCursorKey(a.ID, a.CreatedAt)
	case AuditOrderFieldValidFrom:
		return page.NewCursorKey(a.ID, a.ValidFrom)
	case AuditOrderFieldValidUntil:
		return page.NewCursorKey(a.ID, a.ValidUntil)
	case AuditOrderFieldAuditStartDate:
		return page.NewCursorKey(a.ID, a.AuditStartDate)
	case AuditOrderFieldAuditEndDate:
		return page.NewCursorKey(a.ID, a.AuditEndDate)
	case AuditOrderFieldState:
		return page.NewCursorKey(a.ID, a.State)
	}

	panic(fmt.Sprintf("unsupported order by: %s", field))
}

// AuthorizationAttributes returns the authorization attributes for policy evaluation.
func (a *Audit) AuthorizationAttributes(
	ctx context.Context,
	conn pg.Querier,
	resourceIDs []gid.GID,
) (policy.AttributesByID, error) {
	q := `SELECT id, organization_id FROM audits WHERE id = ANY(@resource_ids::text[])`

	args := pgx.StrictNamedArgs{
		"resource_ids": resourceIDs,
	}

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

	defer rows.Close()

	attrsByID := make(policy.AttributesByID)

	for rows.Next() {
		var id, organizationID gid.GID

		if err := rows.Scan(&id, &organizationID); err != nil {
			return nil, fmt.Errorf("cannot scan authorization attributes: %w", err)
		}

		attrsByID[id] = policy.Attributes{
			"organization_id": organizationID.String(),
		}
	}

	if err := rows.Err(); err != nil {
		return nil, fmt.Errorf("cannot iterate authorization attributes: %w", err)
	}

	return attrsByID, nil
}

func (a *Audit) LoadByID(
	ctx context.Context,
	conn pg.Querier,
	scope Scoper,
	auditID gid.GID,
) error {
	q := `
SELECT
	id,
	name,
	organization_id,
	framework_id,
	report_file_id,
	valid_from,
	valid_until,
	audit_start_date,
	audit_end_date,
	state,
	trust_center_visibility,
	created_at,
	updated_at
FROM
	audits
WHERE
	%s
	AND id = @audit_id
LIMIT 1;
`

	q = fmt.Sprintf(q, scope.SQLFragment())

	args := pgx.StrictNamedArgs{"audit_id": auditID}
	maps.Copy(args, scope.SQLArguments())

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

	audit, err := pgx.CollectExactlyOneRow(rows, pgx.RowToStructByName[Audit])
	if err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			return ErrResourceNotFound
		}

		return fmt.Errorf("cannot collect audit: %w", err)
	}

	*a = audit

	return nil
}

func (a *Audits) CountByOrganizationID(
	ctx context.Context,
	conn pg.Querier,
	scope Scoper,
	organizationID gid.GID,
) (int, error) {
	q := `
SELECT
	COUNT(id)
FROM
	audits
WHERE
	%s
	AND organization_id = @organization_id
`

	q = fmt.Sprintf(q, scope.SQLFragment())

	args := pgx.StrictNamedArgs{"organization_id": organizationID}
	maps.Copy(args, scope.SQLArguments())

	row := conn.QueryRow(ctx, q, args)

	var count int

	err := row.Scan(&count)
	if err != nil {
		return 0, fmt.Errorf("cannot count audits: %w", err)
	}

	return count, nil
}

func (a *Audits) LoadByOrganizationID(
	ctx context.Context,
	conn pg.Querier,
	scope Scoper,
	organizationID gid.GID,
	cursor *page.Cursor[AuditOrderField],
	filter *AuditFilter,
) error {
	q := `
SELECT
	id,
	name,
	organization_id,
	framework_id,
	report_file_id,
	valid_from,
	valid_until,
	audit_start_date,
	audit_end_date,
	state,
	trust_center_visibility,
	created_at,
	updated_at
FROM
	audits
WHERE
	%s
	AND organization_id = @organization_id
	AND %s
	AND %s
`

	q = fmt.Sprintf(q, scope.SQLFragment(), filter.SQLFragment(), cursor.SQLFragment())

	args := pgx.StrictNamedArgs{"organization_id": organizationID}
	maps.Copy(args, scope.SQLArguments())
	maps.Copy(args, filter.SQLArguments())
	maps.Copy(args, cursor.SQLArguments())

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

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

	*a = audits

	return nil
}

func (a *Audit) Insert(
	ctx context.Context,
	conn pg.Tx,
	scope Scoper,
) error {
	q := `
INSERT INTO audits (
	id,
	name,
	tenant_id,
	organization_id,
	framework_id,
	report_file_id,
	valid_from,
	valid_until,
	audit_start_date,
	audit_end_date,
	state,
	trust_center_visibility,
	created_at,
	updated_at
) VALUES (
	@id,
	@name,
	@tenant_id,
	@organization_id,
	@framework_id,
	@report_file_id,
	@valid_from,
	@valid_until,
	@audit_start_date,
	@audit_end_date,
	@state,
	@trust_center_visibility,
	@created_at,
	@updated_at
)
`

	args := pgx.StrictNamedArgs{
		"id":                      a.ID,
		"name":                    a.Name,
		"tenant_id":               scope.GetTenantID(),
		"organization_id":         a.OrganizationID,
		"framework_id":            a.FrameworkID,
		"report_file_id":          a.ReportFileID,
		"valid_from":              a.ValidFrom,
		"valid_until":             a.ValidUntil,
		"audit_start_date":        a.AuditStartDate,
		"audit_end_date":          a.AuditEndDate,
		"state":                   a.State,
		"trust_center_visibility": a.CompliancePortalVisibility,
		"created_at":              a.CreatedAt,
		"updated_at":              a.UpdatedAt,
	}

	_, err := conn.Exec(ctx, q, args)
	if err != nil {
		return fmt.Errorf("cannot insert audit: %w", err)
	}

	return nil
}

func (a *Audit) Update(
	ctx context.Context,
	conn pg.Tx,
	scope Scoper,
) error {
	q := `
UPDATE audits
SET
	name = @name,
	report_file_id = @report_file_id,
	valid_from = @valid_from,
	valid_until = @valid_until,
	audit_start_date = @audit_start_date,
	audit_end_date = @audit_end_date,
	state = @state,
	trust_center_visibility = @trust_center_visibility,
	updated_at = @updated_at
WHERE
	%s
	AND id = @id
`

	q = fmt.Sprintf(q, scope.SQLFragment())

	args := pgx.StrictNamedArgs{
		"id":                      a.ID,
		"name":                    a.Name,
		"report_file_id":          a.ReportFileID,
		"valid_from":              a.ValidFrom,
		"valid_until":             a.ValidUntil,
		"audit_start_date":        a.AuditStartDate,
		"audit_end_date":          a.AuditEndDate,
		"state":                   a.State,
		"trust_center_visibility": a.CompliancePortalVisibility,
		"updated_at":              a.UpdatedAt,
	}
	maps.Copy(args, scope.SQLArguments())

	_, err := conn.Exec(ctx, q, args)
	if err != nil {
		return fmt.Errorf("cannot update audit: %w", err)
	}

	return nil
}

func (a *Audit) Delete(
	ctx context.Context,
	conn pg.Tx,
	scope Scoper,
) error {
	q := `
DELETE FROM audits
WHERE
	%s
	AND id = @id
`

	q = fmt.Sprintf(q, scope.SQLFragment())

	args := pgx.StrictNamedArgs{"id": a.ID}
	maps.Copy(args, scope.SQLArguments())

	_, err := conn.Exec(ctx, q, args)
	if err != nil {
		return fmt.Errorf("cannot delete audit: %w", err)
	}

	return nil
}

func (a *Audits) LoadByControlID(
	ctx context.Context,
	conn pg.Querier,
	scope Scoper,
	controlID gid.GID,
	cursor *page.Cursor[AuditOrderField],
) error {
	q := `
WITH audits_by_control AS (
	SELECT
		a.id,
		a.tenant_id,
		a.name,
		a.organization_id,
		a.framework_id,
		a.report_file_id,
		a.valid_from,
		a.valid_until,
		a.audit_start_date,
		a.audit_end_date,
		a.state,
		a.trust_center_visibility,
		a.created_at,
		a.updated_at
	FROM
		audits a
	INNER JOIN
		controls_audits ca ON a.id = ca.audit_id
	WHERE
		ca.control_id = @control_id
)
SELECT
	id,
	name,
	organization_id,
	framework_id,
	report_file_id,
	valid_from,
	valid_until,
	audit_start_date,
	audit_end_date,
	state,
	trust_center_visibility,
	created_at,
	updated_at
FROM
	audits_by_control
WHERE %s
	AND %s
`
	q = fmt.Sprintf(q, scope.SQLFragment(), cursor.SQLFragment())

	args := pgx.NamedArgs{"control_id": controlID}
	maps.Copy(args, scope.SQLArguments())
	maps.Copy(args, cursor.SQLArguments())

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

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

	*a = audits

	return nil
}

func (a *Audits) LoadByFindingID(
	ctx context.Context,
	conn pg.Querier,
	scope Scoper,
	findingID gid.GID,
	cursor *page.Cursor[AuditOrderField],
) error {
	q := `
WITH audits_by_finding AS (
	SELECT
		a.id,
		a.tenant_id,
		a.name,
		a.organization_id,
		a.framework_id,
		a.report_file_id,
		a.valid_from,
		a.valid_until,
		a.audit_start_date,
		a.audit_end_date,
		a.state,
		a.trust_center_visibility,
		a.created_at,
		a.updated_at
	FROM
		audits a
	INNER JOIN
		findings_audits fa ON a.id = fa.audit_id
	WHERE
		fa.finding_id = @finding_id
)
SELECT
	id,
	name,
	organization_id,
	framework_id,
	report_file_id,
	valid_from,
	valid_until,
	audit_start_date,
	audit_end_date,
	state,
	trust_center_visibility,
	created_at,
	updated_at
FROM
	audits_by_finding
WHERE %s
	AND %s
`
	q = fmt.Sprintf(q, scope.SQLFragment(), cursor.SQLFragment())

	args := pgx.StrictNamedArgs{"finding_id": findingID}
	maps.Copy(args, scope.SQLArguments())
	maps.Copy(args, cursor.SQLArguments())

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

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

	*a = audits

	return nil
}

func (a *Audits) CountByControlID(
	ctx context.Context,
	conn pg.Querier,
	scope Scoper,
	controlID gid.GID,
) (int, error) {
	q := `
WITH audits_by_control AS (
	SELECT
		a.id,
		a.tenant_id
	FROM
		audits a
	INNER JOIN
		controls_audits ca ON a.id = ca.audit_id
	WHERE
		ca.control_id = @control_id
)
SELECT
	COUNT(id)
FROM
	audits_by_control
WHERE
	%s
`

	q = fmt.Sprintf(q, scope.SQLFragment())

	args := pgx.StrictNamedArgs{"control_id": controlID}
	maps.Copy(args, scope.SQLArguments())

	row := conn.QueryRow(ctx, q, args)

	var count int

	err := row.Scan(&count)
	if err != nil {
		return 0, fmt.Errorf("cannot count audits: %w", err)
	}

	return count, nil
}

func (a *Audits) CountByFindingID(
	ctx context.Context,
	conn pg.Querier,
	scope Scoper,
	findingID gid.GID,
) (int, error) {
	q := `
WITH audits_by_finding AS (
	SELECT
		a.id,
		a.tenant_id
	FROM
		audits a
	INNER JOIN
		findings_audits fa ON a.id = fa.audit_id
	WHERE
		fa.finding_id = @finding_id
)
SELECT
	COUNT(id)
FROM
	audits_by_finding
WHERE
	%s
`

	q = fmt.Sprintf(q, scope.SQLFragment())

	args := pgx.StrictNamedArgs{"finding_id": findingID}
	maps.Copy(args, scope.SQLArguments())

	row := conn.QueryRow(ctx, q, args)

	var count int

	err := row.Scan(&count)
	if err != nil {
		return 0, fmt.Errorf("cannot count audits: %w", err)
	}

	return count, nil
}

func (a *Audit) LoadByReportFileID(
	ctx context.Context,
	conn pg.Querier,
	scope Scoper,
	fileID gid.GID,
) error {
	q := `
SELECT
	id,
	name,
	organization_id,
	framework_id,
	report_file_id,
	valid_from,
	valid_until,
	audit_start_date,
	audit_end_date,
	state,
	trust_center_visibility,
	created_at,
	updated_at
FROM
	audits
WHERE %s
	AND report_file_id = @report_file_id
LIMIT 1;
`
	q = fmt.Sprintf(q, scope.SQLFragment())

	args := pgx.StrictNamedArgs{"report_file_id": fileID}
	maps.Copy(args, scope.SQLArguments())

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

	audit, err := pgx.CollectExactlyOneRow(rows, pgx.RowToStructByName[Audit])
	if err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			return ErrResourceNotFound
		}

		return fmt.Errorf("cannot collect audit: %w", err)
	}

	*a = audit

	return nil
}

func (as *Audits) LoadByReportFileIDs(
	ctx context.Context,
	conn pg.Querier,
	scope Scoper,
	fileIDs []gid.GID,
) error {
	q := `
SELECT
	id,
	name,
	organization_id,
	framework_id,
	report_file_id,
	valid_from,
	valid_until,
	audit_start_date,
	audit_end_date,
	state,
	trust_center_visibility,
	created_at,
	updated_at
FROM
	audits
WHERE
	%s
	AND report_file_id = ANY(@file_ids)
`

	q = fmt.Sprintf(q, scope.SQLFragment())

	args := pgx.StrictNamedArgs{"file_ids": fileIDs}
	maps.Copy(args, scope.SQLArguments())

	rows, err := conn.Query(ctx, q, args)
	if err != nil {
		return fmt.Errorf("cannot query audits by report file IDs: %w", err)
	}

	audits, err := pgx.CollectRows(rows, pgx.RowToAddrOfStructByName[Audit])
	if err != nil {
		return fmt.Errorf("cannot collect audits by report file IDs: %w", err)
	}

	*as = audits

	return nil
}

func (as *Audits) LoadByReportIDs(
	ctx context.Context,
	conn pg.Querier,
	scope Scoper,
	reportIDs []gid.GID,
) error {
	q := `
SELECT
	id,
	name,
	organization_id,
	framework_id,
	report_id,
	valid_from,
	valid_until,
	audit_start_date,
	audit_end_date,
	state,
	trust_center_visibility,
	created_at,
	updated_at
FROM
	audits
WHERE
	%s
	AND report_id = ANY(@report_ids)
`

	q = fmt.Sprintf(q, scope.SQLFragment())

	args := pgx.StrictNamedArgs{"report_ids": reportIDs}
	maps.Copy(args, scope.SQLArguments())

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

	audits, err := pgx.CollectRows(rows, pgx.RowToAddrOfStructByName[Audit])
	if err != nil {
		return fmt.Errorf("cannot collect audits by report IDs: %w", err)
	}

	*as = audits

	return nil
}