import { z } from 'zod';

export const TaskStatus = z.enum(['open', 'in_progress', 'review', 'done', 'cancelled']);
export const DecisionStatus = z.enum(['proposed', 'accepted', 'rejected', 'superseded']);
export const MemoryCategory = z.enum(['architecture', 'product', 'technical', 'implementation', 'lesson']);
export const Priority = z.enum(['low', 'medium', 'high', 'critical']);
export const Role = z.enum(['architect', 'implementer', 'reviewer', 'tester']);
export const DelegationMode = z.enum(['manual', 'suggest', 'auto']);

export const TaskSchema = z.object({
  id: z.string().regex(/^TSK-\d{4}$/),
  title: z.string().min(1),
  description: z.string().default(''),
  status: TaskStatus,
  priority: Priority.default('medium'),
  role: Role.optional(),
  assignedTo: z.string().optional(),
  createdAt: z.string().datetime(),
  updatedAt: z.string().datetime(),
  dueDate: z.string().datetime().optional(),
  tags: z.array(z.string()).default([]),
  acceptanceCriteria: z.array(z.string()).default([]),
  sourceHandoff: z.string().optional(),
  // Optional completion metadata (set via `task done --tokens --duration --by`)
  doneBy: z.string().optional(),
  doneTokens: z.number().int().nonnegative().optional(),
  doneDuration: z.number().int().nonnegative().optional(),
});

export const HandoffSchema = z.object({
  id: z.string().regex(/^HOF-\d{4}$/),
  fromRole: z.string().min(1),
  toRole: z.string().min(1),
  fromAgent: z.string().optional(),
  toAgent: z.string().optional(),
  taskId: z.string().optional(),
  summary: z.string().min(1),
  context: z.string().default(''),
  decisions: z.array(z.string()).default([]),
  openQuestions: z.array(z.string()).default([]),
  nextSteps: z.array(z.string()).default([]),
  createdAt: z.string().datetime(),
});

export const DecisionSchema = z.object({
  id: z.string().regex(/^DEC-\d{4}$/),
  title: z.string().min(1),
  status: DecisionStatus.default('accepted'),
  context: z.string().default(''),
  decision: z.string().min(1),
  consequences: z.array(z.string()).default([]),
  alternatives: z.array(z.string()).default([]),
  relatedDecisions: z.array(z.string()).default([]),
  createdAt: z.string().datetime(),
  updatedAt: z.string().datetime(),
});

export const MemorySchema = z.object({
  id: z.string().min(1),
  title: z.string().min(1),
  category: MemoryCategory.default('technical'),
  content: z.string().min(1),
  tags: z.array(z.string()).default([]),
  relatedTasks: z.array(z.string()).default([]),
  relatedDecisions: z.array(z.string()).default([]),
  createdAt: z.string().datetime(),
  updatedAt: z.string().datetime(),
  // Optional agent-supplied metadata (set via `memory add --tokens --duration --by`)
  tokens: z.number().int().nonnegative().optional(),
  duration: z.number().int().nonnegative().optional(),
  by: z.string().optional(),
});

/**
 * Direct message between agents (architect↔implementer, or agent↔agent),
 * routed through the hub. Lightweight, non-task-bound — for questions,
 * clarifications and pings the handoff/memory entities don't cover.
 */
export const MessageSchema = z.object({
  id: z.string().min(1),
  from: z.string().min(1),
  to: z.string().min(1),
  text: z.string().min(1),
  taskId: z.string().optional(),
  status: z.enum(['unread', 'read']).default('unread'),
  createdAt: z.string().datetime(),
  updatedAt: z.string().datetime(),
});

// Activity timeline item returned by GET /tasks/:id/activity
export const ActivityItemSchema = z.object({
  at: z.string().datetime(),
  kind: z.enum(['created', 'handoff', 'result', 'status']),
  actor: z.string(),
  summary: z.string(),
  meta: z.record(z.unknown()).optional(),
});

export type ActivityItem = z.infer<typeof ActivityItemSchema>;

export const StatusSchema = z.object({
  generatedAt: z.string().datetime(),
  activeTasks: z.array(z.string()).default([]),
  blockedTasks: z.array(z.string()).default([]),
  recentDecisions: z.array(z.string()).default([]),
  recentHandoffs: z.array(z.string()).default([]),
  summary: z.string().default(''),
});

export const RoleConfigSchema = z.object({
  preferredAgent: z.string().min(1),
  description: z.string().optional(),
});

/**
 * A named agent in the team roster. Lets the team view show agents (by name,
 * like backyard / mo / zied) with a fixed role + the model behind them — instead
 * of guessing role/identity from whatever tasks the agent happened to touch.
 */
export const AgentConfigSchema = z.object({
  role: Role,
  /** Display model, e.g. "Opus 4.8", "Sonnet 4.6", "Kimi K2", "GPT-5 Codex". */
  model: z.string().optional(),
  /** Provider/company for the logo: "anthropic" | "openai" | "moonshot" | … */
  kind: z.string().optional(),
  description: z.string().optional(),
  /** Optional monthly cost budget in EUR — drives the budget bar on the board. */
  budgetEur: z.number().nonnegative().optional(),
});

export const ConfigSchema = z.object({
  version: z.literal('1'),
  projectName: z.string().min(1),
  delegationMode: DelegationMode.default('suggest'),
  roles: z.record(z.string(), RoleConfigSchema),
  /** Named team roster: agent name → role + model + provider. */
  agents: z.record(z.string(), AgentConfigSchema).optional(),
  serverUrl: z.string().url().optional(),
});

export type Task = z.infer<typeof TaskSchema>;
export type Handoff = z.infer<typeof HandoffSchema>;
export type Decision = z.infer<typeof DecisionSchema>;
export type Memory = z.infer<typeof MemorySchema>;
export type Message = z.infer<typeof MessageSchema>;
export type Status = z.infer<typeof StatusSchema>;
export type Config = z.infer<typeof ConfigSchema>;