/**
 * Database Schema - Drizzle ORM
 * MariaDB 11.4 LTS
 */

import { relations } from 'drizzle-orm'
import {
  mysqlTable,
  varchar,
  text,
  timestamp,
  json,
  int,
  mysqlEnum,
  boolean,
  bigint,
  index,
} from 'drizzle-orm/mysql-core'

// ============================================
// PROJECTS TABLE
// ============================================

export const projects = mysqlTable('projects', {
  id: varchar('id', { length: 36 }).primaryKey(),
  name: varchar('name', { length: 255 }).notNull(),
  description: text('description'),

  // Gitea
  giteaRepoId: int('gitea_repo_id'),
  giteaRepoUrl: varchar('gitea_repo_url', { length: 512 }),
  giteaOwner: varchar('gitea_owner', { length: 100 }),
  giteaRepoName: varchar('gitea_repo_name', { length: 100 }),
  defaultBranch: varchar('default_branch', { length: 100 }).default('main'),

  // K8s
  k8sNamespace: varchar('k8s_namespace', { length: 63 }).notNull().unique(),

  // Infrastructure
  dockerImage: varchar('docker_image', { length: 512 }),
  envVars: json('env_vars').$type<Record<string, string>>(),
  replicas: int('replicas').default(1),
  cpuLimit: varchar('cpu_limit', { length: 20 }).default('500m'),
  memoryLimit: varchar('memory_limit', { length: 20 }).default('512Mi'),

  // Status
  status: mysqlEnum('status', ['active', 'paused', 'archived']).default('active'),

  // Timestamps
  createdAt: timestamp('created_at').defaultNow(),
  updatedAt: timestamp('updated_at').defaultNow().onUpdateNow(),
}, (table) => ({
  statusIdx: index('idx_status').on(table.status),
}))

// ============================================
// AGENTS TABLE
// ============================================

export const agents = mysqlTable('agents', {
  id: varchar('id', { length: 36 }).primaryKey(),

  // K8s
  podName: varchar('pod_name', { length: 253 }).notNull().unique(),
  k8sNamespace: varchar('k8s_namespace', { length: 63 }).default('agents'),

  // Status
  status: mysqlEnum('status', ['idle', 'busy', 'error', 'offline']).default('idle'),
  currentTaskId: varchar('current_task_id', { length: 36 }),

  // Metrics
  tasksCompleted: int('tasks_completed').default(0),
  lastHeartbeat: timestamp('last_heartbeat'),

  // Timestamps
  createdAt: timestamp('created_at').defaultNow(),
  updatedAt: timestamp('updated_at').defaultNow().onUpdateNow(),
}, (table) => ({
  statusIdx: index('idx_status').on(table.status),
}))

// ============================================
// TASKS TABLE
// ============================================

export const tasks = mysqlTable('tasks', {
  id: varchar('id', { length: 36 }).primaryKey(),
  projectId: varchar('project_id', { length: 36 }).notNull().references(() => projects.id, { onDelete: 'cascade' }),

  // Task info
  title: varchar('title', { length: 255 }).notNull(),
  description: text('description'),
  priority: mysqlEnum('priority', ['low', 'medium', 'high', 'urgent']).default('medium'),

  // State
  state: mysqlEnum('state', [
    'backlog',
    'in_progress',
    'needs_input',
    'ready_to_test',
    'approved',
    'staging',
    'production',
  ]).default('backlog'),

  // Assignment
  assignedAgentId: varchar('assigned_agent_id', { length: 36 }).references(() => agents.id, { onDelete: 'set null' }),

  // Git
  branchName: varchar('branch_name', { length: 255 }),
  prUrl: varchar('pr_url', { length: 512 }),

  // Preview
  previewUrl: varchar('preview_url', { length: 512 }),

  // Timestamps
  createdAt: timestamp('created_at').defaultNow(),
  updatedAt: timestamp('updated_at').defaultNow().onUpdateNow(),
}, (table) => ({
  projectStateIdx: index('idx_project_state').on(table.projectId, table.state),
}))

// ============================================
// RELATIONS
// ============================================

export const projectsRelations = relations(projects, ({ many }) => ({
  tasks: many(tasks),
}))

export const tasksRelations = relations(tasks, ({ one }) => ({
  project: one(projects, {
    fields: [tasks.projectId],
    references: [projects.id],
  }),
  assignedAgent: one(agents, {
    fields: [tasks.assignedAgentId],
    references: [agents.id],
  }),
}))

export const agentsRelations = relations(agents, ({ one }) => ({
  currentTask: one(tasks, {
    fields: [agents.currentTaskId],
    references: [tasks.id],
  }),
}))