// 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"
	"errors"
	"fmt"
	"maps"
	"time"

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

type (
	File struct {
		ID             gid.GID        `db:"id"`
		OrganizationID gid.GID        `db:"organization_id"`
		BucketName     string         `db:"bucket_name"`
		MimeType       string         `db:"mime_type"`
		FileName       string         `db:"file_name"`
		FileKey        string         `db:"file_key"`
		FileSize       int64          `db:"file_size"`
		Visibility     FileVisibility `db:"visibility"`
		CreatedAt      time.Time      `db:"created_at"`
		UpdatedAt      time.Time      `db:"updated_at"`
		DeletedAt      *time.Time     `db:"deleted_at"`
	}

	Files []*File
)

func (f *File) GetName() string {
	return f.FileName
}

func (f *File) GetObjectKey() string {
	return f.FileKey
}

func (f *File) GetBucketName() string {
	return f.BucketName
}

func (f *File) GetMimeType() string {
	return f.MimeType
}

var _ filemanager.File = (*File)(nil)

// AuthorizationAttributes returns the authorization attributes for policy evaluation.
func (f *File) AuthorizationAttributes(ctx context.Context, conn pg.Querier) (map[string]string, error) {
	q := `SELECT organization_id FROM files WHERE id = $1 LIMIT 1;`

	var organizationID gid.GID
	if err := conn.QueryRow(ctx, q, f.ID).Scan(&organizationID); err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			return nil, ErrResourceNotFound
		}
		return nil, fmt.Errorf("cannot query file authorization attributes: %w", err)
	}

	return map[string]string{"organization_id": organizationID.String()}, nil
}

func (f *File) LoadByID(
	ctx context.Context,
	conn pg.Querier,
	scope Scoper,
	fileID gid.GID,
) error {
	q := `
SELECT
    id,
    organization_id,
    bucket_name,
    mime_type,
    file_name,
    file_key,
    file_size,
    visibility,
    created_at,
    updated_at,
    deleted_at
FROM
    files
WHERE
    %s
    AND id = @file_id
LIMIT 1;
`

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

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

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

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

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

	*f = file

	return nil
}

func (f *Files) LoadByIDs(
	ctx context.Context,
	conn pg.Querier,
	scope Scoper,
	fileIDs []gid.GID,
) error {
	q := `
SELECT
    id,
    organization_id,
    bucket_name,
    mime_type,
    file_name,
    file_key,
    file_size,
    visibility,
    created_at,
    updated_at,
    deleted_at
FROM
    files
WHERE
    %s
    AND 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 files: %w", err)
	}

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

	*f = files

	return nil
}

func (f File) Insert(
	ctx context.Context,
	conn pg.Tx,
	scope Scoper,
) error {
	q := `
INSERT INTO
    files (
        id,
        tenant_id,
        organization_id,
        bucket_name,
        mime_type,
        file_name,
        file_key,
        file_size,
        visibility,
        created_at,
        updated_at,
        deleted_at
    )
VALUES (
    @file_id,
    @tenant_id,
    @organization_id,
    @bucket_name,
    @mime_type,
    @file_name,
    @file_key,
    @file_size,
    @visibility,
    @created_at,
    @updated_at,
    @deleted_at
)
`

	args := pgx.StrictNamedArgs{
		"file_id":         f.ID,
		"tenant_id":       scope.GetTenantID(),
		"organization_id": f.OrganizationID,
		"bucket_name":     f.BucketName,
		"mime_type":       f.MimeType,
		"file_name":       f.FileName,
		"file_key":        f.FileKey,
		"file_size":       f.FileSize,
		"visibility":      f.Visibility,
		"created_at":      f.CreatedAt,
		"updated_at":      f.UpdatedAt,
		"deleted_at":      f.DeletedAt,
	}
	_, err := conn.Exec(ctx, q, args)

	if err != nil {
		var pgErr *pgconn.PgError
		if errors.As(err, &pgErr) {
			if pgErr.Code == "23505" && pgErr.ConstraintName == "files_file_key_key" {
				return ErrResourceAlreadyExists
			}
		}
		return fmt.Errorf("cannot insert file: %w", err)
	}

	return nil
}

func (f *File) LoadPublicByID(
	ctx context.Context,
	conn pg.Querier,
	fileID gid.GID,
) error {
	q := `
SELECT
    id,
    organization_id,
    bucket_name,
    mime_type,
    file_name,
    file_key,
    file_size,
    visibility,
    created_at,
    updated_at,
    deleted_at
FROM
    files
WHERE
    id = @file_id
    AND visibility = 'PUBLIC'
    AND deleted_at IS NULL
LIMIT 1;
`

	args := pgx.StrictNamedArgs{"file_id": fileID}

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

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

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

	*f = file

	return nil
}

func (f File) SoftDelete(ctx context.Context, conn pg.Tx, scope Scoper) error {
	q := `
UPDATE files
SET deleted_at = NOW()
WHERE %s
    AND id = @file_id
`

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

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

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

	return err
}