// 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"
	"encoding/json"
	"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 (
	CookieConsentRecord struct {
		ID                    gid.GID             `db:"id"`
		OrganizationID        gid.GID             `db:"organization_id"`
		CookieBannerID        gid.GID             `db:"cookie_banner_id"`
		CookieBannerVersionID gid.GID             `db:"cookie_banner_version_id"`
		VisitorID             string              `db:"visitor_id"`
		IPAddress             *string             `db:"ip_address"`
		UserAgent             *string             `db:"user_agent"`
		ConsentData           json.RawMessage     `db:"consent_data"`
		Action                CookieConsentAction `db:"action"`
		SdkVersion            string              `db:"sdk_version"`
		Regulation            *Regulation         `db:"regulation"`
		RegulationSource      *RegulationSource   `db:"regulation_source"`
		CountryCode           *CountryCode        `db:"country_code"`
		ConsentMode           *CookieConsentMode  `db:"consent_mode"`
		CreatedAt             time.Time           `db:"created_at"`
	}

	CookieConsentRecords []*CookieConsentRecord
)

func (r *CookieConsentRecord) CursorKey(field CookieConsentRecordOrderField) page.CursorKey {
	switch field {
	case CookieConsentRecordOrderFieldCreatedAt:
		return page.NewCursorKey(r.ID, r.CreatedAt)
	}

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

func (r *CookieConsentRecord) AuthorizationAttributes(
	ctx context.Context,
	conn pg.Querier,
	resourceIDs []gid.GID,
) (policy.AttributesByID, error) {
	q := `SELECT id, organization_id FROM cookie_consent_records 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 (r *CookieConsentRecords) LoadByCookieBannerID(
	ctx context.Context,
	conn pg.Querier,
	scope Scoper,
	cookieBannerID gid.GID,
	cursor *page.Cursor[CookieConsentRecordOrderField],
	filter *CookieConsentRecordFilter,
) error {
	q := `
SELECT
	id,
	organization_id,
	cookie_banner_id,
	cookie_banner_version_id,
	visitor_id,
	ip_address,
	user_agent,
	consent_data,
	action,
	sdk_version,
	regulation,
	regulation_source,
	country_code,
	consent_mode,
	created_at
FROM
	cookie_consent_records
WHERE
	%s
	AND cookie_banner_id = @cookie_banner_id
	AND %s
	AND %s
`

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

	args := pgx.StrictNamedArgs{"cookie_banner_id": cookieBannerID}
	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 consent records: %w", err)
	}

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

	*r = records

	return nil
}

func (r *CookieConsentRecords) CountByCookieBannerID(
	ctx context.Context,
	conn pg.Querier,
	scope Scoper,
	cookieBannerID gid.GID,
	filter *CookieConsentRecordFilter,
) (int, error) {
	q := `
SELECT
	COUNT(id)
FROM
	cookie_consent_records
WHERE
	%s
	AND cookie_banner_id = @cookie_banner_id
	AND %s
`

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

	args := pgx.StrictNamedArgs{"cookie_banner_id": cookieBannerID}
	maps.Copy(args, scope.SQLArguments())
	maps.Copy(args, filter.SQLArguments())

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

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

	return count, nil
}

func (r *CookieConsentRecord) Insert(
	ctx context.Context,
	tx pg.Tx,
	scope Scoper,
) error {
	q := `
INSERT INTO cookie_consent_records (
	id,
	tenant_id,
	organization_id,
	cookie_banner_id,
	cookie_banner_version_id,
	visitor_id,
	ip_address,
	user_agent,
	consent_data,
	action,
	sdk_version,
	regulation,
	regulation_source,
	country_code,
	consent_mode,
	created_at
) VALUES (
	@id,
	@tenant_id,
	@organization_id,
	@cookie_banner_id,
	@cookie_banner_version_id,
	@visitor_id,
	@ip_address,
	@user_agent,
	@consent_data,
	@action,
	@sdk_version,
	@regulation,
	@regulation_source,
	@country_code,
	@consent_mode,
	@created_at
)
`

	args := pgx.StrictNamedArgs{
		"id":                       r.ID,
		"tenant_id":                scope.GetTenantID(),
		"organization_id":          r.OrganizationID,
		"cookie_banner_id":         r.CookieBannerID,
		"cookie_banner_version_id": r.CookieBannerVersionID,
		"visitor_id":               r.VisitorID,
		"ip_address":               r.IPAddress,
		"user_agent":               r.UserAgent,
		"consent_data":             r.ConsentData,
		"action":                   r.Action,
		"sdk_version":              r.SdkVersion,
		"regulation":               r.Regulation,
		"regulation_source":        r.RegulationSource,
		"country_code":             r.CountryCode,
		"consent_mode":             r.ConsentMode,
		"created_at":               r.CreatedAt,
	}

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

	return nil
}

func (r *CookieConsentRecord) LoadByID(
	ctx context.Context,
	conn pg.Querier,
	scope Scoper,
	id gid.GID,
) error {
	q := `
SELECT
	id,
	organization_id,
	cookie_banner_id,
	cookie_banner_version_id,
	visitor_id,
	ip_address,
	user_agent,
	consent_data,
	action,
	sdk_version,
	regulation,
	regulation_source,
	country_code,
	consent_mode,
	created_at
FROM
	cookie_consent_records
WHERE
	%s
	AND id = @id
`

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

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

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

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

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

	*r = record

	return nil
}

func (r *CookieConsentRecord) LoadLatestByVisitorAndBannerID(
	ctx context.Context,
	conn pg.Querier,
	scope Scoper,
	cookieBannerID gid.GID,
	visitorID string,
) error {
	q := `
SELECT
	id,
	organization_id,
	cookie_banner_id,
	cookie_banner_version_id,
	visitor_id,
	ip_address,
	user_agent,
	consent_data,
	action,
	sdk_version,
	regulation,
	regulation_source,
	country_code,
	consent_mode,
	created_at
FROM
	cookie_consent_records
WHERE
	%s
	AND cookie_banner_id = @cookie_banner_id
	AND visitor_id = @visitor_id
ORDER BY created_at DESC, id DESC
LIMIT 1;
`

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

	args := pgx.StrictNamedArgs{
		"cookie_banner_id": cookieBannerID,
		"visitor_id":       visitorID,
	}
	maps.Copy(args, scope.SQLArguments())

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

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

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

	*r = record

	return nil
}