/**
 * handStore.ts - Hand, Trigger, and Approval management store
 *
 * Extracted from gatewayStore.ts for Phase 11 Store Refactoring.
 * Manages ZCLAW Hands, Triggers, and Approval workflows.
 */
import { create } from 'zustand';
import type { GatewayClient } from '../lib/gateway-client';
import { canAutoExecute, getAutonomyManager } from '../lib/autonomy-manager';
import type { AutonomyDecision } from '../lib/autonomy-manager';
import { saasClient } from '../lib/saas-client';

// === Re-exported Types (from gatewayStore for compatibility) ===

export interface HandRequirement {
  description: string;
  met: boolean;
  details?: string;
}

export interface Hand {
  id: string;
  name: string;
  description: string;
  status: 'idle' | 'running' | 'needs_approval' | 'error' | 'unavailable' | 'setup_needed';
  currentRunId?: string;
  requirements_met?: boolean;
  category?: string;
  icon?: string;
  provider?: string;
  model?: string;
  requirements?: HandRequirement[];
  tools?: string[];
  metrics?: string[];
  toolCount?: number;
  metricCount?: number;
}

export interface HandRun {
  runId: string;
  status: string;
  startedAt: string;
  completedAt?: string;
  result?: unknown;
  error?: string;
}

export interface Trigger {
  id: string;
  type: string;
  enabled: boolean;
}

export type ApprovalStatus = 'pending' | 'approved' | 'rejected' | 'expired';

export interface Approval {
  id: string;
  handName: string;
  runId?: string;
  status: ApprovalStatus;
  requestedAt: string;
  requestedBy?: string;
  reason?: string;
  action?: string;
  params?: Record<string, unknown>;
  respondedAt?: string;
  respondedBy?: string;
  responseReason?: string;
}

// === Trigger Create Options ===

export interface TriggerCreateOptions {
  type: string;
  name?: string;
  enabled?: boolean;
  config?: Record<string, unknown>;
  handName?: string;
  workflowId?: string;
}

// === Raw API Response Types (for mapping) ===

interface RawHandRequirement {
  description?: string;
  name?: string;
  met?: boolean;
  satisfied?: boolean;
  details?: string;
  hint?: string;
}

interface RawHandRun {
  runId?: string;
  run_id?: string;
  id?: string;
  status?: string;
  startedAt?: string;
  started_at?: string;
  created_at?: string;
  completedAt?: string;
  completed_at?: string;
  finished_at?: string;
  result?: unknown;
  output?: unknown;
  error?: string;
  message?: string;
}

interface RawApproval {
  id?: string;
  approvalId?: string;
  approval_id?: string;
  type?: string;
  request_type?: string;
  handId?: string;
  hand_id?: string;
  hand_name?: string;
  handName?: string;
  run_id?: string;
  runId?: string;
  requester?: string;
  requested_by?: string;
  requestedAt?: string;
  requested_at?: string;
  status?: string;
  reason?: string;
  description?: string;
  action?: string;
  params?: Record<string, unknown>;
  responded_at?: string;
  respondedAt?: string;
  responded_by?: string;
  respondedBy?: string;
  response_reason?: string;
  responseReason?: string;
}

// === Store Interface ===

interface HandClient {
  listHands: () => Promise<{ hands?: Array<Record<string, unknown>> } | null>;
  getHand: (name: string) => Promise<Record<string, unknown> | null>;
  listHandRuns: (name: string, opts?: { limit?: number; offset?: number }) => Promise<{ runs?: RawHandRun[] } | null>;
  triggerHand: (name: string, params?: Record<string, unknown>, autonomyLevel?: string) => Promise<{ runId?: string; status?: string } | null>;
  approveHand: (name: string, runId: string, approved: boolean, reason?: string) => Promise<{ status: string }>;
  cancelHand: (name: string, runId: string) => Promise<{ status: string }>;
  listTriggers: () => Promise<{ triggers?: Trigger[] } | null>;
  getTrigger: (id: string) => Promise<Trigger | null>;
  createTrigger: (trigger: { type: string; name?: string; enabled?: boolean; config?: Record<string, unknown>; handName?: string; workflowId?: string }) => Promise<{ id?: string } | null>;
  updateTrigger: (id: string, updates: { name?: string; enabled?: boolean; config?: Record<string, unknown>; handName?: string; workflowId?: string }) => Promise<{ id: string }>;
  deleteTrigger: (id: string) => Promise<{ status: string }>;
  listApprovals: (status?: ApprovalStatus) => Promise<{ approvals?: RawApproval[] } | null>;
  respondToApproval: (approvalId: string, approved: boolean, reason?: string) => Promise<{ status: string }>;
}

// === Store State Slice ===

export interface HandStateSlice {
  hands: Hand[];
  handRuns: Record<string, HandRun[]>;
  triggers: Trigger[];
  approvals: Approval[];
  isLoading: boolean;
  error: string | null;
  client: HandClient | null;
  /** Latest autonomy decision (set when action requires approval) */
  autonomyDecision: AutonomyDecision | null;
}

// === Store Actions Slice ===

export interface HandActionsSlice {
  setHandStoreClient: (client: HandClient) => void;
  loadHands: () => Promise<void>;
  getHandDetails: (name: string) => Promise<Hand | undefined>;
  triggerHand: (name: string, params?: Record<string, unknown>, autonomyLevel?: string) => Promise<HandRun | undefined>;
  loadHandRuns: (name: string, opts?: { limit?: number; offset?: number }) => Promise<HandRun[]>;
  approveHand: (name: string, runId: string, approved: boolean, reason?: string) => Promise<void>;
  cancelHand: (name: string, runId: string) => Promise<void>;
  loadTriggers: () => Promise<void>;
  getTrigger: (id: string) => Promise<Trigger | undefined>;
  createTrigger: (trigger: TriggerCreateOptions) => Promise<Trigger | undefined>;
  updateTrigger: (id: string, updates: { name?: string; enabled?: boolean; config?: Record<string, unknown>; handName?: string; workflowId?: string }) => Promise<Trigger | undefined>;
  deleteTrigger: (id: string) => Promise<void>;
  loadApprovals: (status?: ApprovalStatus) => Promise<void>;
  respondToApproval: (approvalId: string, approved: boolean, reason?: string) => Promise<void>;
  clearError: () => void;
  clearAutonomyDecision: () => void;
}

// === Combined Store Type ===

export type HandStore = HandStateSlice & HandActionsSlice;

export const useHandStore = create<HandStore>((set, get) => ({
  // Initial State
  hands: [],
  handRuns: {},
  triggers: [],
  approvals: [],
  isLoading: false,
  error: null,
  autonomyDecision: null,
  client: null,

  // Client injection
  setHandStoreClient: (client: HandClient) => {
    set({ client });
  },

  // === Hand Actions ===

  loadHands: async () => {
    const client = get().client;
    if (!client) return;

    set({ isLoading: true });
    try {
      const result = await client.listHands();
      const validStatuses = ['idle', 'running', 'needs_approval', 'error', 'unavailable', 'setup_needed'] as const;
      const hands: Hand[] = (result?.hands || []).map((h: Record<string, unknown>) => {
        const status = validStatuses.includes(h.status as Hand['status'])
          ? h.status as Hand['status']
          : (h.requirements_met ? 'idle' : 'setup_needed');
        return {
          id: String(h.id || h.name),
          name: String(h.name || ''),
          description: String(h.description || ''),
          status,
          requirements_met: Boolean(h.requirements_met),
          category: h.category as string | undefined,
          icon: h.icon as string | undefined,
          toolCount: (h.tool_count as number) || ((h.tools as unknown[])?.length),
          metricCount: (h.metric_count as number) || ((h.metrics as unknown[])?.length),
        };
      });
      set({ hands, isLoading: false });
    } catch (err) {
      console.error('[HandStore] loadHands error:', err);
      set({ isLoading: false });
    }
  },

  getHandDetails: async (name: string) => {
    const client = get().client;
    if (!client) return undefined;

    try {
      const result = await client.getHand(name);
      if (!result) return undefined;

      const getStringFromConfig = (key: string): string | undefined => {
        const val = (result.config as Record<string, unknown>)?.[key];
        return typeof val === 'string' ? val : undefined;
      };
      const getArrayFromConfig = (key: string): string[] | undefined => {
        const val = (result.config as Record<string, unknown>)?.[key];
        return Array.isArray(val) ? val : undefined;
      };

      const validStatuses = ['idle', 'running', 'needs_approval', 'error', 'unavailable', 'setup_needed'] as const;
      const status = validStatuses.includes(result.status as Hand['status'])
        ? result.status as Hand['status']
        : (result.requirements_met ? 'idle' : 'setup_needed');

      const hand: Hand = {
        id: String(result.id || result.name || name),
        name: String(result.name || name),
        description: String(result.description || ''),
        status,
        requirements_met: Boolean(result.requirements_met),
        category: result.category as string | undefined,
        icon: result.icon as string | undefined,
        provider: (result.provider as string) || getStringFromConfig('provider'),
        model: (result.model as string) || getStringFromConfig('model'),
        requirements: ((result.requirements as RawHandRequirement[]) || []).map((r) => ({
          description: r.description || r.name || String(r),
          met: r.met ?? r.satisfied ?? true,
          details: r.details || r.hint,
        })),
        tools: (result.tools as string[]) || getArrayFromConfig('tools'),
        metrics: (result.metrics as string[]) || getArrayFromConfig('metrics'),
        toolCount: (result.tool_count as number) || ((result.tools as unknown[])?.length) || 0,
        metricCount: (result.metric_count as number) || ((result.metrics as unknown[])?.length) || 0,
      };

      set(state => ({
        hands: state.hands.map(h => h.name === name ? { ...h, ...hand } : h),
      }));

      return hand;
    } catch {
      return undefined;
    }
  },

  loadHandRuns: async (name: string, opts?: { limit?: number; offset?: number }) => {
    const client = get().client;
    if (!client) return [];

    try {
      const result = await client.listHandRuns(name, opts);
      const runs: HandRun[] = (result?.runs || []).map((r: RawHandRun) => ({
        runId: r.runId || r.run_id || r.id || '',
        status: r.status || 'unknown',
        startedAt: r.startedAt || r.started_at || r.created_at || new Date().toISOString(),
        completedAt: r.completedAt || r.completed_at || r.finished_at,
        result: r.result || r.output,
        error: r.error || r.message,
      }));
      set(state => ({
        handRuns: { ...state.handRuns, [name]: runs },
      }));
      return runs;
    } catch {
      return [];
    }
  },

  triggerHand: async (name: string, params?: Record<string, unknown>) => {
    const client = get().client;
    if (!client) return undefined;

    // Autonomy check before executing hand
    const { canProceed, decision } = canAutoExecute('hand_trigger', 5);
    if (!canProceed) {
      // Store decision for UI to display approval prompt
      set(() => ({
        autonomyDecision: decision,
      }));
      return undefined;
    }

    // Pass current autonomy level to backend for defense-in-depth enforcement
    const autonomyLevel = getAutonomyManager().getConfig().level;

    try {
      const result = await client.triggerHand(name, params, autonomyLevel);
      if (!result) return undefined;

      const run: HandRun = {
        runId: result.runId || '',
        status: result.status || 'running',
        startedAt: new Date().toISOString(),
      };

      // Add run to local state
      set(state => ({
        handRuns: {
          ...state.handRuns,
          [name]: [run, ...(state.handRuns[name] || [])],
        },
      }));

      // Refresh hands to update status
      await get().loadHands();

      // Report hand execution to billing (fire-and-forget, non-blocking)
      try {
        if (saasClient.isAuthenticated()) {
          saasClient.reportUsageFireAndForget('hand_executions');
        }
      } catch { /* billing reporting must never block */ }

      return run;
    } catch (err: unknown) {
      set({ error: err instanceof Error ? err.message : String(err) });
      return undefined;
    }
  },

  approveHand: async (name: string, runId: string, approved: boolean, reason?: string) => {
    const client = get().client;
    if (!client) return;

    try {
      await client.approveHand(name, runId, approved, reason);
      await get().loadHands();
    } catch (err: unknown) {
      set({ error: err instanceof Error ? err.message : String(err) });
      throw err;
    }
  },

  cancelHand: async (name: string, runId: string) => {
    const client = get().client;
    if (!client) return;

    try {
      await client.cancelHand(name, runId);
      await get().loadHands();
    } catch (err: unknown) {
      set({ error: err instanceof Error ? err.message : String(err) });
      throw err;
    }
  },

  // === Trigger Actions ===

  loadTriggers: async () => {
    const client = get().client;
    if (!client) return;

    try {
      const result = await client.listTriggers();
      set({ triggers: result?.triggers || [] });
    } catch {
      // ignore if triggers API not available
    }
  },

  getTrigger: async (id: string) => {
    const client = get().client;
    if (!client) return undefined;

    try {
      const result = await client.getTrigger(id);
      if (!result) return undefined;
      return {
        id: result.id,
        type: result.type,
        enabled: result.enabled,
      } as Trigger;
    } catch (err: unknown) {
      set({ error: err instanceof Error ? err.message : String(err) });
      return undefined;
    }
  },

  createTrigger: async (trigger: TriggerCreateOptions) => {
    const client = get().client;
    if (!client) return undefined;

    try {
      const result = await client.createTrigger(trigger);
      if (!result?.id) return undefined;
      await get().loadTriggers();
      return get().triggers.find(t => t.id === result.id);
    } catch (err: unknown) {
      set({ error: err instanceof Error ? err.message : String(err) });
      return undefined;
    }
  },

  updateTrigger: async (id: string, updates) => {
    const client = get().client;
    if (!client) return undefined;

    try {
      await client.updateTrigger(id, updates);
      set(state => ({
        triggers: state.triggers.map(t =>
          t.id === id ? { ...t, ...updates } : t
        ),
      }));
      return get().triggers.find(t => t.id === id);
    } catch (err: unknown) {
      set({ error: err instanceof Error ? err.message : String(err) });
      return undefined;
    }
  },

  deleteTrigger: async (id: string) => {
    const client = get().client;
    if (!client) return;

    try {
      await client.deleteTrigger(id);
      set(state => ({
        triggers: state.triggers.filter(t => t.id !== id),
      }));
    } catch (err: unknown) {
      set({ error: err instanceof Error ? err.message : String(err) });
      throw err;
    }
  },

  // === Approval Actions ===

  loadApprovals: async (status?: ApprovalStatus) => {
    const client = get().client;
    if (!client) return;

    try {
      const result = await client.listApprovals(status);
      const approvals: Approval[] = (result?.approvals || []).map((a: RawApproval) => ({
        id: a.id || a.approval_id || a.approvalId || '',
        handName: a.hand_name || a.handName || '',
        runId: a.run_id || a.runId,
        status: (a.status || 'pending') as ApprovalStatus,
        requestedAt: a.requested_at || a.requestedAt || new Date().toISOString(),
        requestedBy: a.requested_by || a.requester,
        reason: a.reason || a.description,
        action: a.action || 'execute',
        params: a.params,
        respondedAt: a.responded_at || a.respondedAt,
        respondedBy: a.responded_by || a.respondedBy,
        responseReason: a.response_reason || a.responseReason,
      }));
      set({ approvals });
    } catch {
      // ignore if approvals API not available
    }
  },

  respondToApproval: async (approvalId: string, approved: boolean, reason?: string) => {
    const client = get().client;
    if (!client) return;

    try {
      await client.respondToApproval(approvalId, approved, reason);
      await get().loadApprovals();
    } catch (err: unknown) {
      set({ error: err instanceof Error ? err.message : String(err) });
      throw err;
    }
  },

  clearError: () => set({ error: null }),
  clearAutonomyDecision: () => set({ autonomyDecision: null }),
}));

/**
 * Helper to create a HandClient adapter from a GatewayClient.
 * Use this to inject the client into handStore.
 */
export function createHandClientFromGateway(client: GatewayClient): HandClient {
  return {
    listHands: () => client.listHands(),
    getHand: (name) => client.getHand(name),
    listHandRuns: (name, opts) => client.listHandRuns(name, opts),
    triggerHand: (name, params) => client.triggerHand(name, params),
    approveHand: (name, runId, approved, reason) => client.approveHand(name, runId, approved, reason),
    cancelHand: (name, runId) => client.cancelHand(name, runId),
    listTriggers: () => client.listTriggers(),
    getTrigger: (id) => client.getTrigger(id),
    createTrigger: (trigger) => client.createTrigger(trigger),
    updateTrigger: (id, updates) => client.updateTrigger(id, updates),
    deleteTrigger: (id) => client.deleteTrigger(id),
    listApprovals: (status) => client.listApprovals(status),
    respondToApproval: (approvalId, approved, reason) => client.respondToApproval(approvalId, approved, reason),
  };
}

// === Kernel Client Adapter ===

import type { KernelClient } from '../lib/kernel-client';

/**
 * Helper to create a HandClient adapter from a KernelClient.
 * Maps KernelClient methods (Tauri invoke) to the HandClient interface.
 */
function createHandClientFromKernel(client: KernelClient): HandClient {
  return {
    listHands: async () => {
      try {
        const result = await client.listHands();
        // KernelClient returns typed objects; cast to Record<string, unknown> for HandClient compatibility
        const hands: Array<Record<string, unknown>> = result.hands.map((h) => ({
          id: h.id || h.name,
          name: h.name,
          description: h.description,
          status: h.status,
          requirements_met: h.requirements_met,
          category: h.category,
          icon: h.icon,
          tool_count: h.tool_count,
          tools: h.tools,
          metric_count: h.metric_count,
          metrics: h.metrics,
        }));
        return { hands };
      } catch {
        return null;
      }
    },
    getHand: async (name: string) => {
      try {
        const result = await client.getHand(name);
        return result as Record<string, unknown> || null;
      } catch {
        return null;
      }
    },
    listHandRuns: async (name: string, opts) => {
      try {
        const result = await client.listHandRuns(name, opts);
        return result as unknown as { runs?: RawHandRun[] } | null;
      } catch {
        return null;
      }
    },
    triggerHand: async (name: string, params) => {
      try {
        const result = await client.triggerHand(name, params);
        return { runId: result.runId, status: result.status };
      } catch {
        return null;
      }
    },
    approveHand: async (name: string, runId: string, approved: boolean, reason?: string) => {
      return client.approveHand(name, runId, approved, reason);
    },
    cancelHand: async (name: string, runId: string) => {
      return client.cancelHand(name, runId);
    },
    listTriggers: async () => {
      try {
        const result = await client.listTriggers();
        if (!result?.triggers) return { triggers: [] };
        // Map KernelClient trigger shape to HandClient Trigger shape
        const triggers: Trigger[] = result.triggers.map((t) => ({
          id: t.id,
          type: t.triggerType,
          enabled: t.enabled,
        }));
        return { triggers };
      } catch {
        return { triggers: [] };
      }
    },
    getTrigger: async (id: string) => {
      try {
        const result = await client.getTrigger(id);
        if (!result) return null;
        return {
          id: result.id,
          type: result.triggerType,
          enabled: result.enabled,
        } as Trigger;
      } catch {
        return null;
      }
    },
    createTrigger: async (trigger) => {
      try {
        const result = await client.createTrigger({
          id: `${trigger.type}_${Date.now()}`,
          name: trigger.name || trigger.type,
          handId: trigger.handName || '',
          triggerType: { type: trigger.type },
          enabled: trigger.enabled,
          description: trigger.config ? JSON.stringify(trigger.config) : undefined,
        });
        return result ? { id: result.id } : null;
      } catch {
        return null;
      }
    },
    updateTrigger: async (id: string, updates) => {
      const result = await client.updateTrigger(id, {
        name: updates.name,
        enabled: updates.enabled,
        handId: updates.handName,
        triggerType: updates.config ? { type: (updates.config as Record<string, unknown>).type as string } : undefined,
      });
      return { id: result.id };
    },
    deleteTrigger: async (id: string) => {
      await client.deleteTrigger(id);
      return { status: 'deleted' };
    },
    listApprovals: async () => {
      try {
        const result = await client.listApprovals();
        // Map KernelClient approval shape to HandClient RawApproval shape
        const approvals: RawApproval[] = (result?.approvals || []).map((a) => ({
          id: a.id,
          hand_id: a.handId,
          status: a.status,
          requestedAt: a.createdAt,
        }));
        return { approvals };
      } catch {
        return { approvals: [] };
      }
    },
    respondToApproval: async (approvalId: string, approved: boolean, reason?: string) => {
      await client.respondToApproval(approvalId, approved, reason);
      return { status: approved ? 'approved' : 'rejected' };
    },
  };
}

// === Client Injection ===

/**
 * Sets the client for the hand store.
 * Called by the coordinator during initialization.
 * Detects whether the client is a KernelClient (Tauri) or GatewayClient (browser).
 */
export function setHandStoreClient(client: unknown): void {
  let handClient: HandClient;

  // Check if it's a KernelClient (has listHands method that returns typed objects)
  if (client && typeof client === 'object' && 'listHands' in client) {
    handClient = createHandClientFromKernel(client as KernelClient);
  } else if (client && typeof client === 'object') {
    // It's a GatewayClient
    handClient = createHandClientFromGateway(client as GatewayClient);
  } else {
    // Fallback: return a stub client that gracefully handles all calls
    handClient = {
      listHands: async () => null,
      getHand: async () => null,
      listHandRuns: async () => null,
      triggerHand: async () => null,
      approveHand: async () => ({ status: 'error' }),
      cancelHand: async () => ({ status: 'error' }),
      listTriggers: async () => ({ triggers: [] }),
      getTrigger: async () => null,
      createTrigger: async () => null,
      updateTrigger: async () => ({ id: '' }),
      deleteTrigger: async () => ({ status: 'error' }),
      listApprovals: async () => ({ approvals: [] }),
      respondToApproval: async () => ({ status: 'error' }),
    };
  }

  useHandStore.getState().setHandStoreClient(handClient);
}