// Copyright 2016 clair authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package migrations

import "github.com/remind101/migrate"

func init() {
	// This migration creates the initial Clair's schema.
	RegisterMigration(migrate.Migration{
		ID: 2,
		Up: migrate.Queries([]string{
			`CREATE TABLE IF NOT EXISTS Namespace (
        id SERIAL PRIMARY KEY,
        name VARCHAR(128) NULL);`,

			`CREATE TABLE IF NOT EXISTS Layer (
        id SERIAL PRIMARY KEY,
        name VARCHAR(128) NOT NULL UNIQUE,
        engineversion SMALLINT NOT NULL,
        parent_id INT NULL REFERENCES Layer ON DELETE CASCADE,
        namespace_id INT NULL REFERENCES Namespace,
        created_at TIMESTAMP WITH TIME ZONE);`,
			`CREATE INDEX ON Layer (parent_id);`,
			`CREATE INDEX ON Layer (namespace_id);`,

			`CREATE TABLE IF NOT EXISTS Feature (
        id SERIAL PRIMARY KEY,
        namespace_id INT NOT NULL REFERENCES Namespace,
        name VARCHAR(128) NOT NULL,
        UNIQUE (namespace_id, name));`,

			`CREATE TABLE IF NOT EXISTS FeatureVersion (
        id SERIAL PRIMARY KEY,
        feature_id INT NOT NULL REFERENCES Feature,
        version VARCHAR(128) NOT NULL);`,
			`CREATE INDEX ON FeatureVersion (feature_id);`,

			`CREATE TYPE modification AS ENUM ('add', 'del');`,
			`CREATE TABLE IF NOT EXISTS Layer_diff_FeatureVersion (
        id SERIAL PRIMARY KEY,
        layer_id INT NOT NULL REFERENCES Layer ON DELETE CASCADE,
        featureversion_id INT NOT NULL REFERENCES FeatureVersion,
        modification modification NOT NULL,
        UNIQUE (layer_id, featureversion_id));`,
			`CREATE INDEX ON Layer_diff_FeatureVersion (layer_id);`,
			`CREATE INDEX ON Layer_diff_FeatureVersion (featureversion_id);`,
			`CREATE INDEX ON Layer_diff_FeatureVersion (featureversion_id, layer_id);`,

			`CREATE TYPE severity AS ENUM ('Unknown', 'Negligible', 'Low', 'Medium', 'High', 'Critical', 'Defcon1');`,
			`CREATE TABLE IF NOT EXISTS Vulnerability (
        id SERIAL PRIMARY KEY,
        namespace_id INT NOT NULL REFERENCES Namespace,
        name VARCHAR(128) NOT NULL,
        description TEXT NULL,
        link VARCHAR(128) NULL,
        severity severity NOT NULL,
        metadata TEXT NULL,
        created_at TIMESTAMP WITH TIME ZONE,
        deleted_at TIMESTAMP WITH TIME ZONE NULL);`,

			`CREATE TABLE IF NOT EXISTS Vulnerability_FixedIn_Feature (
        id SERIAL PRIMARY KEY,
        vulnerability_id INT NOT NULL REFERENCES Vulnerability ON DELETE CASCADE,
        feature_id INT NOT NULL REFERENCES Feature,
        version VARCHAR(128) NOT NULL,
        UNIQUE (vulnerability_id, feature_id));`,
			`CREATE INDEX ON Vulnerability_FixedIn_Feature (feature_id, vulnerability_id);`,

			`CREATE TABLE IF NOT EXISTS Vulnerability_Affects_FeatureVersion (
        id SERIAL PRIMARY KEY,
        vulnerability_id INT NOT NULL REFERENCES Vulnerability ON DELETE CASCADE,
        featureversion_id INT NOT NULL REFERENCES FeatureVersion,
        fixedin_id INT NOT NULL REFERENCES Vulnerability_FixedIn_Feature ON DELETE CASCADE,
        UNIQUE (vulnerability_id, featureversion_id));`,
			`CREATE INDEX ON Vulnerability_Affects_FeatureVersion (fixedin_id);`,
			`CREATE INDEX ON Vulnerability_Affects_FeatureVersion (featureversion_id, vulnerability_id);`,

			`CREATE TABLE IF NOT EXISTS KeyValue (
        id SERIAL PRIMARY KEY,
        key VARCHAR(128) NOT NULL UNIQUE,
        value TEXT);`,

			`CREATE TABLE IF NOT EXISTS Lock (
        id SERIAL PRIMARY KEY,
        name VARCHAR(64) NOT NULL UNIQUE,
        owner VARCHAR(64) NOT NULL,
        until TIMESTAMP WITH TIME ZONE);`,
			`CREATE INDEX ON Lock (owner);`,

			`CREATE TABLE IF NOT EXISTS Vulnerability_Notification (
        id SERIAL PRIMARY KEY,
        name VARCHAR(64) NOT NULL UNIQUE,
        created_at TIMESTAMP WITH TIME ZONE,
        notified_at TIMESTAMP WITH TIME ZONE NULL,
        deleted_at TIMESTAMP WITH TIME ZONE NULL,
        old_vulnerability_id INT NULL REFERENCES Vulnerability ON DELETE CASCADE,
        new_vulnerability_id INT NULL REFERENCES Vulnerability ON DELETE CASCADE);`,
			`CREATE INDEX ON Vulnerability_Notification (notified_at);`,
		}),
		Down: migrate.Queries([]string{
			`DROP TABLE IF EXISTS
        Namespace,
        Layer,
        Feature,
        FeatureVersion,
        Layer_diff_FeatureVersion,
        Vulnerability,
        Vulnerability_FixedIn_Feature,
        Vulnerability_Affects_FeatureVersion,
        Vulnerability_Notification,
        KeyValue,
        Lock
        CASCADE;`,
		}),
	})
}