import { NextResponse } from 'next/server'
import { ZodSchema, ZodError } from 'zod'
import { z } from 'zod'

export async function validateBody<T>(
  request: Request,
  schema: ZodSchema<T>
): Promise<{ data: T } | { error: NextResponse }> {
  try {
    const body = await request.json()
    const data = schema.parse(body)
    return { data }
  } catch (err) {
    if (err instanceof ZodError) {
      const messages = err.issues.map((e: z.ZodIssue) => `${e.path.join('.')}: ${e.message}`)
      return {
        error: NextResponse.json(
          { error: 'Validation failed', details: messages },
          { status: 400 }
        ),
      }
    }
    return {
      error: NextResponse.json({ error: 'Invalid request body' }, { status: 400 }),
    }
  }
}

export const createTaskSchema = z.object({
  title: z.string().min(1, 'Title is required').max(500),
  description: z.string().max(5000).optional(),
  status: z.enum(['inbox', 'assigned', 'in_progress', 'review', 'quality_review', 'done']).default('inbox'),
  priority: z.enum(['critical', 'high', 'medium', 'low']).default('medium'),
  project_id: z.number().int().positive().optional(),
  assigned_to: z.string().max(100).optional(),
  created_by: z.string().max(100).optional(),
  due_date: z.number().optional(),
  estimated_hours: z.number().min(0).optional(),
  actual_hours: z.number().min(0).optional(),
  tags: z.array(z.string()).default([] as string[]),
  metadata: z.record(z.string(), z.unknown()).default({} as Record<string, unknown>),
})

export const updateTaskSchema = createTaskSchema.partial()

export const createAgentSchema = z.object({
  name: z.string().min(1, 'Name is required').max(100),
  role: z.string().min(1, 'Role is required').max(100).optional(),
  session_key: z.string().max(200).optional(),
  soul_content: z.string().max(50000).optional(),
  status: z.enum(['online', 'offline', 'busy', 'idle', 'error']).default('offline'),
  config: z.record(z.string(), z.unknown()).default({} as Record<string, unknown>),
  template: z.string().max(100).optional(),
  gateway_config: z.record(z.string(), z.unknown()).optional(),
  write_to_gateway: z.boolean().optional(),
})

export const bulkUpdateTaskStatusSchema = z.object({
  tasks: z.array(z.object({
    id: z.number().int().positive(),
    status: z.enum(['inbox', 'assigned', 'in_progress', 'review', 'quality_review', 'done']),
  })).min(1, 'At least one task is required').max(100),
})

export const createWebhookSchema = z.object({
  name: z.string().min(1, 'Name is required').max(200),
  url: z.string().url('Invalid URL'),
  events: z.array(z.string()).optional(),
  generate_secret: z.boolean().optional(),
})

export const createAlertSchema = z.object({
  name: z.string().min(1, 'Name is required').max(200),
  description: z.string().max(1000).optional(),
  entity_type: z.enum(['agent', 'task', 'session', 'activity']),
  condition_field: z.string().min(1).max(100),
  condition_operator: z.enum(['equals', 'not_equals', 'greater_than', 'less_than', 'contains', 'count_above', 'count_below', 'age_minutes_above']),
  condition_value: z.string().min(1).max(500),
  action_type: z.string().max(100).optional(),
  action_config: z.record(z.string(), z.unknown()).optional(),
  cooldown_minutes: z.number().min(1).max(10080).optional(),
})

export const notificationActionSchema = z.object({
  action: z.literal('mark-delivered'),
  agent: z.string().min(1, 'Agent name is required'),
})

export const integrationActionSchema = z.object({
  action: z.enum(['test', 'pull', 'pull-all']),
  integrationId: z.string().optional(),
  category: z.string().optional(),
})

export const createPipelineSchema = z.object({
  name: z.string().min(1, 'Name is required'),
  description: z.string().optional(),
  steps: z.array(z.object({
    template_id: z.number(),
    on_failure: z.enum(['stop', 'continue']).default('stop'),
  })).min(2, 'Pipeline needs at least 2 steps'),
})

export const createWorkflowSchema = z.object({
  name: z.string().min(1, 'Name is required'),
  task_prompt: z.string().min(1, 'Task prompt is required'),
  description: z.string().optional(),
  model: z.string().default('sonnet'),
  timeout_seconds: z.number().default(300),
  agent_role: z.string().optional(),
  tags: z.array(z.string()).default([]),
})

export const createCommentSchema = z.object({
  task_id: z.number().optional(),
  content: z.string().min(1, 'Comment content is required'),
  author: z.string().optional(),
  parent_id: z.number().optional(),
})

export const createMessageSchema = z.object({
  to: z.string().min(1, 'Recipient is required'),
  message: z.string().min(1, 'Message is required'),
  from: z.string().optional().default('system'),
})

export const updateSettingsSchema = z.object({
  settings: z.record(z.string(), z.unknown()),
})

export const gatewayConfigUpdateSchema = z.object({
  updates: z.record(z.string(), z.unknown()),
})

export const qualityReviewSchema = z.object({
  taskId: z.number(),
  reviewer: z.string().default('aegis'),
  status: z.enum(['approved', 'rejected']),
  notes: z.string().min(1, 'Notes are required for quality reviews'),
})

export const spawnAgentSchema = z.object({
  task: z.string().min(1, 'Task is required'),
  model: z.string().min(1, 'Model is required'),
  label: z.string().min(1, 'Label is required'),
  timeoutSeconds: z.number().min(10).max(3600).default(300),
})

export const createUserSchema = z.object({
  username: z.string().min(1, 'Username is required'),
  password: z.string().min(12, 'Password must be at least 12 characters'),
  display_name: z.string().optional(),
  role: z.enum(['admin', 'operator', 'viewer']).default('operator'),
  provider: z.enum(['local', 'google']).default('local'),
  email: z.string().optional(),
})

export const accessRequestActionSchema = z.object({
  request_id: z.number(),
  action: z.enum(['approve', 'reject']),
  role: z.enum(['admin', 'operator', 'viewer']).default('viewer'),
  note: z.string().optional(),
})

export const connectSchema = z.object({
  tool_name: z.string().min(1, 'Tool name is required').max(100),
  tool_version: z.string().max(50).optional(),
  agent_name: z.string().min(1, 'Agent name is required').max(100),
  agent_role: z.string().max(100).optional(),
  metadata: z.record(z.string(), z.unknown()).optional(),
})

export const githubSyncSchema = z.object({
  action: z.enum(['sync', 'comment', 'close', 'status']),
  repo: z.string().regex(/^[^/]+\/[^/]+$/, 'Repo must be owner/repo format').optional(),
  labels: z.string().optional(),
  state: z.enum(['open', 'closed', 'all']).optional(),
  assignAgent: z.string().optional(),
  issueNumber: z.number().optional(),
  body: z.string().optional(),
  comment: z.string().optional(),
})