// Copyright (c) 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"
	"errors"
	"fmt"
	"time"

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

type (
	OAuth2RefreshToken struct {
		ID            gid.GID      `db:"id"`
		HashedValue   []byte       `db:"hashed_value"`
		ClientID      gid.GID      `db:"client_id"`
		IdentityID    gid.GID      `db:"identity_id"`
		Scopes        OAuth2Scopes `db:"scopes"`
		AccessTokenID gid.GID      `db:"access_token_id"`
		CreatedAt     time.Time    `db:"created_at"`
		ExpiresAt     time.Time    `db:"expires_at"`
		RevokedAt     *time.Time   `db:"revoked_at"`
	}
)

func (t *OAuth2RefreshToken) Insert(ctx context.Context, conn pg.Tx) error {
	q := `
INSERT INTO iam_oauth2_refresh_tokens (
	id,
	hashed_value,
	client_id,
	identity_id,
	scopes,
	access_token_id,
	created_at,
	expires_at,
	revoked_at
) VALUES (
	@id,
	@hashed_value,
	@client_id,
	@identity_id,
	@scopes,
	@access_token_id,
	@created_at,
	@expires_at,
	@revoked_at
)
`

	args := pgx.StrictNamedArgs{
		"id":              t.ID,
		"hashed_value":    t.HashedValue,
		"client_id":       t.ClientID,
		"identity_id":     t.IdentityID,
		"scopes":          t.Scopes,
		"access_token_id": t.AccessTokenID,
		"created_at":      t.CreatedAt,
		"expires_at":      t.ExpiresAt,
		"revoked_at":      t.RevokedAt,
	}

	if _, err := conn.Exec(ctx, q, args); err != nil {
		return fmt.Errorf("cannot insert oauth2_refresh_token: %w", err)
	}

	return nil
}

func (t *OAuth2RefreshToken) LoadByHashedValue(
	ctx context.Context,
	conn pg.Querier,
	hashedValue []byte,
) error {
	q := `
SELECT
	id,
	hashed_value,
	client_id,
	identity_id,
	scopes,
	access_token_id,
	created_at,
	expires_at,
	revoked_at
FROM
	iam_oauth2_refresh_tokens
WHERE
	hashed_value = @hashed_value
LIMIT 1;
`

	rows, err := conn.Query(
		ctx,
		q,
		pgx.StrictNamedArgs{"hashed_value": hashedValue},
	)
	if err != nil {
		return fmt.Errorf("cannot query oauth2_refresh_token: %w", err)
	}

	token, err := pgx.CollectExactlyOneRow(rows, pgx.RowToStructByName[OAuth2RefreshToken])
	if err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			return ErrResourceNotFound
		}

		return fmt.Errorf("cannot collect oauth2_refresh_token: %w", err)
	}

	*t = token
	return nil
}

func (t *OAuth2RefreshToken) LoadByHashedValueAndClientID(
	ctx context.Context,
	conn pg.Querier,
	hashedValue []byte,
	clientID gid.GID,
) error {
	q := `
SELECT
	id,
	hashed_value,
	client_id,
	identity_id,
	scopes,
	access_token_id,
	created_at,
	expires_at,
	revoked_at
FROM
	iam_oauth2_refresh_tokens
WHERE
	hashed_value = @hashed_value
	AND client_id = @client_id
LIMIT 1;
`

	rows, err := conn.Query(
		ctx,
		q,
		pgx.StrictNamedArgs{
			"hashed_value": hashedValue,
			"client_id":    clientID,
		},
	)
	if err != nil {
		return fmt.Errorf("cannot query oauth2_refresh_token: %w", err)
	}

	token, err := pgx.CollectExactlyOneRow(rows, pgx.RowToStructByName[OAuth2RefreshToken])
	if err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			return ErrResourceNotFound
		}

		return fmt.Errorf("cannot collect oauth2_refresh_token: %w", err)
	}

	*t = token
	return nil
}

func (t *OAuth2RefreshToken) LoadByHashedValueForUpdate(
	ctx context.Context,
	conn pg.Tx,
	hashedValue []byte,
	clientID gid.GID,
) error {
	q := `
SELECT
	id,
	hashed_value,
	client_id,
	identity_id,
	scopes,
	access_token_id,
	created_at,
	expires_at,
	revoked_at
FROM
	iam_oauth2_refresh_tokens
WHERE
	hashed_value = @hashed_value
	AND client_id = @client_id
FOR UPDATE;
`

	rows, err := conn.Query(
		ctx,
		q,
		pgx.StrictNamedArgs{
			"hashed_value": hashedValue,
			"client_id":    clientID,
		},
	)
	if err != nil {
		return fmt.Errorf("cannot query oauth2_refresh_token: %w", err)
	}

	token, err := pgx.CollectExactlyOneRow(rows, pgx.RowToStructByName[OAuth2RefreshToken])
	if err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			return ErrResourceNotFound
		}

		return fmt.Errorf("cannot collect oauth2_refresh_token: %w", err)
	}

	*t = token
	return nil
}

func (t *OAuth2RefreshToken) Revoke(
	ctx context.Context,
	conn pg.Tx,
	now time.Time,
) error {
	q := `
UPDATE iam_oauth2_refresh_tokens
SET
	revoked_at = @revoked_at
WHERE
	id = @id
`

	args := pgx.StrictNamedArgs{
		"id":         t.ID,
		"revoked_at": now,
	}

	if _, err := conn.Exec(ctx, q, args); err != nil {
		return fmt.Errorf("cannot revoke oauth2_refresh_token: %w", err)
	}

	return nil
}

func (t *OAuth2RefreshToken) RevokeByClientAndIdentity(
	ctx context.Context,
	conn pg.Tx,
	clientID gid.GID,
	identityID gid.GID,
	now time.Time,
) (int64, error) {
	q := `
UPDATE iam_oauth2_refresh_tokens
SET
	revoked_at = @revoked_at
WHERE
	client_id = @client_id
	AND identity_id = @identity_id
	AND revoked_at IS NULL
`

	result, err := conn.Exec(
		ctx,
		q,
		pgx.StrictNamedArgs{
			"client_id":   clientID,
			"identity_id": identityID,
			"revoked_at":  now,
		},
	)
	if err != nil {
		return 0, fmt.Errorf("cannot revoke oauth2_refresh_tokens by client and identity: %w", err)
	}

	return result.RowsAffected(), nil
}

func (t *OAuth2RefreshToken) RevokeByAccessTokenID(
	ctx context.Context,
	conn pg.Tx,
	accessTokenID gid.GID,
	now time.Time,
) (int64, error) {
	q := `
UPDATE iam_oauth2_refresh_tokens
SET
	revoked_at = @revoked_at
WHERE
	access_token_id = @access_token_id
	AND revoked_at IS NULL
`

	result, err := conn.Exec(
		ctx,
		q,
		pgx.StrictNamedArgs{
			"access_token_id": accessTokenID,
			"revoked_at":      now,
		},
	)
	if err != nil {
		return 0, fmt.Errorf("cannot revoke oauth2_refresh_tokens by access_token_id: %w", err)
	}

	return result.RowsAffected(), nil
}

func (t *OAuth2RefreshToken) DeleteExpired(
	ctx context.Context,
	conn pg.Tx,
	now time.Time,
) (int64, error) {
	q := `
DELETE FROM iam_oauth2_refresh_tokens
WHERE
	expires_at < @now
	OR (revoked_at IS NOT NULL AND revoked_at < @revoked_cutoff)
`

	result, err := conn.Exec(
		ctx,
		q,
		pgx.StrictNamedArgs{
			"now":            now,
			"revoked_cutoff": now.Add(-7 * 24 * time.Hour),
		},
	)
	if err != nil {
		return 0, fmt.Errorf("cannot delete expired oauth2_refresh_tokens: %w", err)
	}

	return result.RowsAffected(), nil
}