/**
 * OpenClaw Memory API Plugin
 *
 * Provides memory_store, memory_recall, memory_list, memory_delete tools
 * backed by the shared PostgreSQL memory API (claude-memory service).
 */

const PLUGIN_ID = "memory-api";

const memoryApiPlugin = {
  id: PLUGIN_ID,
  name: "Memory (API)",
  description: "PostgreSQL-backed shared memory via claude-memory API",
  kind: "memory",
  configSchema: {
    type: "object",
    additionalProperties: false,
    properties: {},
  },
  register(api) {
    const apiUrl =
      process.env.MEMORY_API_URL || "http://claude-memory.claude-memory.svc.cluster.local";
    const apiKey = process.env.MEMORY_API_KEY || "";

    async function apiRequest(method, path, body) {
      const url = `${apiUrl}${path}`;
      const headers = {
        Authorization: `Bearer ${apiKey}`,
        "Content-Type": "application/json",
      };
      const options = { method, headers };
      if (body) {
        options.body = JSON.stringify(body);
      }
      const resp = await fetch(url, options);
      if (!resp.ok) {
        const text = await resp.text();
        throw new Error(`API error ${resp.status}: ${text}`);
      }
      return resp.json();
    }

    // memory_store
    api.registerTool({
      name: "memory_store",
      label: "Memory Store",
      description:
        "Store a fact or memory in persistent shared storage. Use to remember preferences, projects, decisions, or people.",
      parameters: {
        type: "object",
        properties: {
          content: { type: "string", description: "The fact or memory to store" },
          category: {
            type: "string",
            enum: ["facts", "preferences", "projects", "people", "decisions"],
            description: "Category for organizing the memory",
          },
          tags: { type: "string", description: "Comma-separated tags" },
          importance: {
            type: "number",
            description: "Importance 0.0-1.0",
            minimum: 0.0,
            maximum: 1.0,
          },
          expanded_keywords: {
            type: "string",
            description:
              "REQUIRED. Space-separated semantically related search terms (MINIMUM 5 words).",
          },
        },
        required: ["content", "expanded_keywords"],
      },
      async execute(_toolCallId, params) {
        const result = await apiRequest("POST", "/api/memories", {
          content: params.content,
          category: params.category || "facts",
          tags: params.tags || "",
          expanded_keywords: params.expanded_keywords || "",
          importance: params.importance ?? 0.5,
        });
        return {
          content: [
            {
              type: "text",
              text: `Stored memory #${result.id} in category '${result.category}' with importance ${Number(result.importance).toFixed(1)}`,
            },
          ],
        };
      },
    });

    // memory_recall
    api.registerTool({
      name: "memory_recall",
      label: "Memory Recall",
      description:
        "Retrieve relevant memories based on context. Uses full-text search to find stored memories.",
      parameters: {
        type: "object",
        properties: {
          context: {
            type: "string",
            description: "The context or topic to recall memories about",
          },
          expanded_query: {
            type: "string",
            description:
              "REQUIRED. Space-separated semantically related search terms (MINIMUM 5 words).",
          },
          category: {
            type: "string",
            enum: ["facts", "preferences", "projects", "people", "decisions"],
            description: "Optional: filter results to a specific category",
          },
          sort_by: {
            type: "string",
            enum: ["importance", "relevance"],
            description: "Sort order",
          },
          limit: { type: "integer", description: "Max results" },
        },
        required: ["context", "expanded_query"],
      },
      async execute(_toolCallId, params) {
        const result = await apiRequest("POST", "/api/memories/recall", {
          context: params.context,
          expanded_query: params.expanded_query || "",
          category: params.category || null,
          sort_by: params.sort_by || "importance",
          limit: params.limit || 10,
        });
        const rows = result.memories || [];
        if (!rows.length) {
          const filterDesc = params.category ? ` in category '${params.category}'` : "";
          return {
            content: [
              { type: "text", text: `No memories found matching: ${params.context}${filterDesc}` },
            ],
          };
        }
        const sortDesc =
          params.sort_by === "relevance" ? "by relevance" : "by importance";
        const filterDesc = params.category ? ` in '${params.category}'` : "";
        const lines = rows.map(
          (r) =>
            `#${r.id} [${r.category}] (importance: ${Number(r.importance).toFixed(1)}) ${r.content}\n  Tags: ${r.tags || "none"} | Stored: ${r.created_at}`,
        );
        return {
          content: [
            {
              type: "text",
              text: `Found ${rows.length} memories${filterDesc} (${sortDesc}):\n\n${lines.join("\n\n")}`,
            },
          ],
        };
      },
    });

    // memory_list
    api.registerTool({
      name: "memory_list",
      label: "Memory List",
      description: "List recent memories, optionally filtered by category.",
      parameters: {
        type: "object",
        properties: {
          category: {
            type: "string",
            enum: ["facts", "preferences", "projects", "people", "decisions"],
          },
          limit: { type: "integer" },
        },
      },
      async execute(_toolCallId, params) {
        const limit = params.limit || 20;
        let path = `/api/memories?limit=${limit}`;
        if (params.category) {
          path += `&category=${params.category}`;
        }
        const result = await apiRequest("GET", path);
        const rows = result.memories || [];
        if (!rows.length) {
          return {
            content: [
              {
                type: "text",
                text: params.category
                  ? `No memories in category '${params.category}'`
                  : "No memories stored yet",
              },
            ],
          };
        }
        const lines = rows.map(
          (r) =>
            `#${r.id} [${r.category}] ${r.content}\n  Importance: ${Number(r.importance).toFixed(1)} | Tags: ${r.tags || "none"} | Stored: ${r.created_at}`,
        );
        const header =
          "Recent memories" + (params.category ? ` in '${params.category}'` : "");
        return {
          content: [
            {
              type: "text",
              text: `${header} (${rows.length} shown):\n\n${lines.join("\n\n")}`,
            },
          ],
        };
      },
    });

    // memory_delete
    api.registerTool({
      name: "memory_delete",
      label: "Memory Delete",
      description: "Delete a memory by ID.",
      parameters: {
        type: "object",
        properties: {
          id: { type: "integer", description: "The ID of the memory to delete" },
        },
        required: ["id"],
      },
      async execute(_toolCallId, params) {
        const result = await apiRequest("DELETE", `/api/memories/${params.id}`);
        return {
          content: [
            {
              type: "text",
              text: `Deleted memory #${result.deleted}: ${result.preview}...`,
            },
          ],
        };
      },
    });
  },
};

export default memoryApiPlugin;