use sea_orm_migration::{prelude::*, schema::*};

use crate::{m20260503_093223_add_tag_table::Tag, m20260503_125344_add_category_table::Category};

#[derive(DeriveMigrationName)]
pub struct Migration;

#[async_trait::async_trait]
impl MigrationTrait for Migration {
    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
        manager
            .create_table(
                Table::create()
                    .table(Todo::Table)
                    .if_not_exists()
                    .col(pk_uuid(Todo::Id))
                    .col(string(Todo::OwnerId))
                    .col(string(Todo::Title))
                    .col(string(Todo::Note))
                    .col(uuid_null(Todo::CategoryId))
                    .foreign_key(
                        ForeignKey::create()
                            .from(Todo::Table, Todo::CategoryId)
                            .to(Category::Table, Category::Id)
                            .on_delete(ForeignKeyAction::SetNull)
                            .on_update(ForeignKeyAction::Cascade),
                    )
                    .to_owned(),
            )
            .await?;

        manager
            .create_table(
                Table::create()
                    .table(TodoTag::Table)
                    .if_not_exists()
                    .primary_key(Index::create().col(TodoTag::TagId).col(TodoTag::TodoId))
                    .col(uuid(TodoTag::TagId))
                    .col(uuid(TodoTag::TodoId))
                    .foreign_key(
                        ForeignKey::create()
                            .from(TodoTag::Table, TodoTag::TagId)
                            .to(Tag::Table, Tag::Id)
                            .on_delete(ForeignKeyAction::Cascade)
                            .on_update(ForeignKeyAction::Cascade),
                    )
                    .foreign_key(
                        ForeignKey::create()
                            .from(TodoTag::Table, TodoTag::TodoId)
                            .to(Todo::Table, Todo::Id)
                            .on_delete(ForeignKeyAction::Cascade)
                            .on_update(ForeignKeyAction::Cascade),
                    )
                    .to_owned(),
            )
            .await
    }

    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
        manager
            .drop_table(Table::drop().table(TodoTag::Table).to_owned())
            .await?;

        manager
            .drop_table(Table::drop().table(Todo::Table).to_owned())
            .await
    }
}

#[derive(DeriveIden)]
pub enum Todo {
    Table,
    Id,
    OwnerId,
    Title,
    Note,
    CategoryId,
}

#[derive(DeriveIden)]
enum TodoTag {
    Table,
    TodoId,
    TagId,
}