import { type Options, query, type SDKMessage } from "@anthropic-ai/claude-agent-sdk";
import packageJson from "../package.json" with { type: "json" };
import { log } from "../utils/cli.ts";
import { addInstructions } from "./instructions.ts";
import { agent, createAgentEnv, installFromNpmTarball } from "./shared.ts";

export const claude = agent({
  name: "claude",
  install: async () => {
    const versionRange = packageJson.dependencies["@anthropic-ai/claude-agent-sdk"] || "latest";
    return await installFromNpmTarball({
      packageName: "@anthropic-ai/claude-agent-sdk",
      version: versionRange,
      executablePath: "cli.js",
    });
  },
  run: async ({ payload, mcpServers, apiKey, cliPath, repo }) => {
    // Ensure API key is NOT in process.env - only pass via SDK's env option
    delete process.env.ANTHROPIC_API_KEY;

    const prompt = addInstructions({ payload, repo });
    log.group("Full prompt", () => log.info(prompt));

    // configure sandbox mode if enabled
    const sandboxOptions: Options = payload.sandbox
      ? {
          permissionMode: "default",
          disallowedTools: ["Bash", "WebSearch", "WebFetch", "Write"],
          async canUseTool(toolName, input, _options) {
            if (toolName.startsWith("mcp__gh_pullfrog__"))
              return {
                behavior: "allow",
                updatedInput: input,
                updatedPermissions: [],
              };

            console.error("can i use this tool?", toolName);
            return {
              behavior: "deny",
              message: "You are not allowed to use this tool.",
            };
          },
        }
      : {
          permissionMode: "bypassPermissions" as const,
        };

    if (payload.sandbox) {
      log.info("🔒 sandbox mode enabled: restricting to read-only operations");
    }

    // Pass secrets via SDK's env option only (not process.env)
    // This ensures secrets are only available to Claude Code subprocess, not user code
    const queryInstance = query({
      prompt,
      options: {
        ...sandboxOptions,
        mcpServers,
        model: "claude-opus-4-5",
        pathToClaudeCodeExecutable: cliPath,
        env: createAgentEnv({ ANTHROPIC_API_KEY: apiKey }),
      },
    });

    // Stream the results
    for await (const message of queryInstance) {
      log.debug(JSON.stringify(message, null, 2));
      const handler = messageHandlers[message.type];
      await handler(message as never);
    }

    return {
      success: true,
      output: "",
    };
  },
});

type SDKMessageType = SDKMessage["type"];

type SDKMessageHandler<type extends SDKMessageType = SDKMessageType> = (
  data: Extract<SDKMessage, { type: type }>
) => void | Promise<void>;

type SDKMessageHandlers = {
  [type in SDKMessageType]: SDKMessageHandler<type>;
};

// Track bash tool IDs to identify when bash tool results come back
const bashToolIds = new Set<string>();

const messageHandlers: SDKMessageHandlers = {
  assistant: (data) => {
    if (data.message?.content) {
      for (const content of data.message.content) {
        if (content.type === "text" && content.text?.trim()) {
          log.box(content.text.trim(), { title: "Claude" });
        } else if (content.type === "tool_use") {
          // Track bash tool IDs
          if (content.name === "bash" && content.id) {
            bashToolIds.add(content.id);
          }

          log.toolCall({
            toolName: content.name,
            input: content.input,
          });
        }
      }
    }
  },
  user: (data) => {
    if (data.message?.content) {
      for (const content of data.message.content) {
        if (content.type === "tool_result") {
          const toolUseId = (content as any).tool_use_id;
          const isBashTool = toolUseId && bashToolIds.has(toolUseId);

          if (isBashTool) {
            // Log bash output in a collapsed group
            const outputContent =
              typeof content.content === "string"
                ? content.content
                : Array.isArray(content.content)
                  ? content.content
                      .map((c: any) => (typeof c === "string" ? c : c.text || JSON.stringify(c)))
                      .join("\n")
                  : String(content.content);

            log.startGroup(`bash output`);
            if (content.is_error) {
              log.warning(outputContent);
            } else {
              log.info(outputContent);
            }
            log.endGroup();
            // Clean up the tracked ID
            bashToolIds.delete(toolUseId);
          } else if (content.is_error) {
            const errorContent =
              typeof content.content === "string" ? content.content : String(content.content);
            log.warning(`Tool error: ${errorContent}`);
          }
        }
      }
    }
  },
  result: async (data) => {
    log.debug(JSON.stringify(data, null, 2));
    if (data.subtype === "success") {
      await log.summaryTable([
        [
          { data: "Cost", header: true },
          { data: "Input Tokens", header: true },
          { data: "Output Tokens", header: true },
        ],
        [
          `$${data.total_cost_usd?.toFixed(4) || "0.0000"}`,
          String(data.usage?.input_tokens || 0),
          String(data.usage?.output_tokens || 0),
        ],
      ]);
    } else if (data.subtype === "error_max_turns") {
      log.error(`Max turns reached: ${JSON.stringify(data)}`);
    } else if (data.subtype === "error_during_execution") {
      log.error(`Execution error: ${JSON.stringify(data)}`);
    } else {
      log.error(`Failed: ${JSON.stringify(data)}`);
    }
  },
  system: () => {},
  stream_event: () => {},
  tool_progress: () => {},
  auth_status: () => {},
};