use sea_orm_migration::prelude::*;

#[derive(DeriveMigrationName)]
pub struct Migration;

#[async_trait::async_trait]
impl MigrationTrait for Migration {
    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
        // 班次表
        manager
            .create_table(
                Table::create()
                    .table(Shift::Table)
                    .col(
                        ColumnDef::new(Shift::Id)
                            .uuid()
                            .not_null()
                            .primary_key(),
                    )
                    .col(ColumnDef::new(Shift::TenantId).uuid().not_null())
                    .col(ColumnDef::new(Shift::ShiftDate).date().not_null())
                    .col(ColumnDef::new(Shift::Period).string_len(20).not_null())
                    .col(ColumnDef::new(Shift::NurseId).uuid())
                    .col(ColumnDef::new(Shift::Status).string_len(20).not_null().default("scheduled"))
                    .col(ColumnDef::new(Shift::Notes).text())
                    .col(ColumnDef::new(Shift::CreatedAt).timestamp_with_time_zone().not_null())
                    .col(ColumnDef::new(Shift::UpdatedAt).timestamp_with_time_zone().not_null())
                    .col(ColumnDef::new(Shift::CreatedBy).uuid())
                    .col(ColumnDef::new(Shift::UpdatedBy).uuid())
                    .col(ColumnDef::new(Shift::DeletedAt).timestamp_with_time_zone())
                    .col(ColumnDef::new(Shift::Version).integer().not_null().default(1))
                    .to_owned(),
            )
            .await?;

        manager
            .create_index(
                Index::create()
                    .name("idx_shifts_tenant_date")
                    .table(Shift::Table)
                    .col(Shift::TenantId)
                    .col(Shift::ShiftDate)
                    .col(Shift::DeletedAt)
                    .to_owned(),
            )
            .await?;

        manager
            .create_index(
                Index::create()
                    .name("idx_shifts_tenant_nurse")
                    .table(Shift::Table)
                    .col(Shift::TenantId)
                    .col(Shift::NurseId)
                    .col(Shift::DeletedAt)
                    .to_owned(),
            )
            .await?;

        // 患者分配表
        manager
            .create_table(
                Table::create()
                    .table(PatientAssignment::Table)
                    .col(
                        ColumnDef::new(PatientAssignment::Id)
                            .uuid()
                            .not_null()
                            .primary_key(),
                    )
                    .col(ColumnDef::new(PatientAssignment::TenantId).uuid().not_null())
                    .col(ColumnDef::new(PatientAssignment::ShiftId).uuid().not_null())
                    .col(ColumnDef::new(PatientAssignment::PatientId).uuid().not_null())
                    .col(ColumnDef::new(PatientAssignment::CareLevel).string_len(20).not_null().default("routine"))
                    .col(ColumnDef::new(PatientAssignment::Notes).text())
                    .col(ColumnDef::new(PatientAssignment::CreatedAt).timestamp_with_time_zone().not_null())
                    .col(ColumnDef::new(PatientAssignment::UpdatedAt).timestamp_with_time_zone().not_null())
                    .col(ColumnDef::new(PatientAssignment::CreatedBy).uuid())
                    .col(ColumnDef::new(PatientAssignment::UpdatedBy).uuid())
                    .col(ColumnDef::new(PatientAssignment::DeletedAt).timestamp_with_time_zone())
                    .col(ColumnDef::new(PatientAssignment::Version).integer().not_null().default(1))
                    .to_owned(),
            )
            .await?;

        manager
            .create_foreign_key(
                ForeignKey::create()
                    .name("fk_patient_assignments_shift")
                    .from(PatientAssignment::Table, PatientAssignment::ShiftId)
                    .to(Shift::Table, Shift::Id)
                    .on_delete(ForeignKeyAction::Cascade)
                    .to_owned(),
            )
            .await?;

        manager
            .create_index(
                Index::create()
                    .name("idx_patient_assignments_shift")
                    .table(PatientAssignment::Table)
                    .col(PatientAssignment::TenantId)
                    .col(PatientAssignment::ShiftId)
                    .col(PatientAssignment::DeletedAt)
                    .to_owned(),
            )
            .await?;

        manager
            .create_index(
                Index::create()
                    .name("idx_patient_assignments_patient")
                    .table(PatientAssignment::Table)
                    .col(PatientAssignment::TenantId)
                    .col(PatientAssignment::PatientId)
                    .col(PatientAssignment::DeletedAt)
                    .to_owned(),
            )
            .await?;

        // 交接日志表
        manager
            .create_table(
                Table::create()
                    .table(HandoffLog::Table)
                    .col(
                        ColumnDef::new(HandoffLog::Id)
                            .uuid()
                            .not_null()
                            .primary_key(),
                    )
                    .col(ColumnDef::new(HandoffLog::TenantId).uuid().not_null())
                    .col(ColumnDef::new(HandoffLog::FromShiftId).uuid().not_null())
                    .col(ColumnDef::new(HandoffLog::ToShiftId).uuid().not_null())
                    .col(ColumnDef::new(HandoffLog::PatientId).uuid().not_null())
                    .col(ColumnDef::new(HandoffLog::Notes).text())
                    .col(ColumnDef::new(HandoffLog::PendingItems).json_binary())
                    .col(ColumnDef::new(HandoffLog::CreatedAt).timestamp_with_time_zone().not_null())
                    .col(ColumnDef::new(HandoffLog::UpdatedAt).timestamp_with_time_zone().not_null())
                    .col(ColumnDef::new(HandoffLog::CreatedBy).uuid())
                    .col(ColumnDef::new(HandoffLog::UpdatedBy).uuid())
                    .col(ColumnDef::new(HandoffLog::DeletedAt).timestamp_with_time_zone())
                    .col(ColumnDef::new(HandoffLog::Version).integer().not_null().default(1))
                    .to_owned(),
            )
            .await?;

        manager
            .create_foreign_key(
                ForeignKey::create()
                    .name("fk_handoff_log_from_shift")
                    .from(HandoffLog::Table, HandoffLog::FromShiftId)
                    .to(Shift::Table, Shift::Id)
                    .on_delete(ForeignKeyAction::Cascade)
                    .to_owned(),
            )
            .await?;

        manager
            .create_foreign_key(
                ForeignKey::create()
                    .name("fk_handoff_log_to_shift")
                    .from(HandoffLog::Table, HandoffLog::ToShiftId)
                    .to(Shift::Table, Shift::Id)
                    .on_delete(ForeignKeyAction::Cascade)
                    .to_owned(),
            )
            .await?;

        manager
            .create_index(
                Index::create()
                    .name("idx_handoff_log_to_shift")
                    .table(HandoffLog::Table)
                    .col(HandoffLog::TenantId)
                    .col(HandoffLog::ToShiftId)
                    .col(HandoffLog::DeletedAt)
                    .to_owned(),
            )
            .await?;

        Ok(())
    }

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

#[derive(DeriveIden)]
enum Shift {
    Table,
    Id,
    TenantId,
    ShiftDate,
    Period,
    NurseId,
    Status,
    Notes,
    CreatedAt,
    UpdatedAt,
    CreatedBy,
    UpdatedBy,
    DeletedAt,
    Version,
}

#[derive(DeriveIden)]
enum PatientAssignment {
    Table,
    Id,
    TenantId,
    ShiftId,
    PatientId,
    CareLevel,
    Notes,
    CreatedAt,
    UpdatedAt,
    CreatedBy,
    UpdatedBy,
    DeletedAt,
    Version,
}

#[derive(DeriveIden)]
enum HandoffLog {
    Table,
    Id,
    TenantId,
    FromShiftId,
    ToShiftId,
    PatientId,
    Notes,
    PendingItems,
    CreatedAt,
    UpdatedAt,
    CreatedBy,
    UpdatedBy,
    DeletedAt,
    Version,
}