import { readdir as fsReaddir, stat as fsStat } from "node:fs/promises";
import { Text } from "@earendil-works/pi-tui";
import nodePath from "path";
import { Type } from "typebox";
import { keyHint } from "../../modes/interactive/components/keybinding-hints.js";
import { pathExists, resolveToCwd } from "./path-utils.js";
import { getTextOutput, renderToolPath, str } from "./render-utils.js";
import { wrapToolDefinition } from "./tool-definition-wrapper.js";
import { DEFAULT_MAX_BYTES, formatSize, truncateHead } from "./truncate.js";
const lsSchema = Type.Object({
    path: Type.Optional(Type.String({ description: "Directory to list (default: current directory)" })),
    limit: Type.Optional(Type.Number({ description: "Maximum number of entries to return (default: 500)" })),
});
export const lsToolSystemPromptContribution = {
    snippet: "List directory contents",
    guidelines: [],
};
const DEFAULT_LIMIT = 500;
const defaultLsOperations = {
    exists: pathExists,
    stat: fsStat,
    readdir: fsReaddir,
};
function formatLsCall(args, theme, cwd) {
    const limit = args?.limit;
    const pathDisplay = renderToolPath(str(args?.path), theme, cwd, { emptyFallback: "." });
    let text = `${theme.fg("toolTitle", theme.bold("ls"))} ${pathDisplay}`;
    if (limit !== undefined) {
        text += theme.fg("toolOutput", ` (limit ${limit})`);
    }
    return text;
}
function formatLsResult(result, options, theme, showImages) {
    const output = getTextOutput(result, showImages).trim();
    let text = "";
    if (output) {
        const lines = output.split("\n");
        const maxLines = options.expanded ? lines.length : 20;
        const displayLines = lines.slice(0, maxLines);
        const remaining = lines.length - maxLines;
        text += `\n${displayLines.map((line) => theme.fg("toolOutput", line)).join("\n")}`;
        if (remaining > 0) {
            text += `${theme.fg("muted", `\n... (${remaining} more lines,`)} ${keyHint("app.tools.expand", "to expand")}${theme.fg("muted", ")")}`;
        }
    }
    const entryLimit = result.details?.entryLimitReached;
    const truncation = result.details?.truncation;
    if (entryLimit || truncation?.truncated) {
        const warnings = [];
        if (entryLimit)
            warnings.push(`${entryLimit} entries limit`);
        if (truncation?.truncated)
            warnings.push(`${formatSize(truncation.maxBytes ?? DEFAULT_MAX_BYTES)} limit`);
        text += `\n${theme.fg("warning", `[Truncated: ${warnings.join(", ")}]`)}`;
    }
    return text;
}
export function createLsToolDefinition(cwd, options) {
    const ops = options?.operations ?? defaultLsOperations;
    return {
        name: "ls",
        label: "ls",
        description: `List directory contents. Returns entries sorted alphabetically, with '/' suffix for directories. Includes dotfiles. Output is truncated to ${DEFAULT_LIMIT} entries or ${DEFAULT_MAX_BYTES / 1024}KB (whichever is hit first).`,
        promptSnippet: lsToolSystemPromptContribution.snippet,
        parameters: lsSchema,
        async execute(_toolCallId, { path, limit }, signal, _onUpdate, _ctx) {
            return new Promise((resolve, reject) => {
                if (signal?.aborted) {
                    reject(new Error("Operation aborted"));
                    return;
                }
                const onAbort = () => reject(new Error("Operation aborted"));
                signal?.addEventListener("abort", onAbort, { once: true });
                (async () => {
                    try {
                        const dirPath = resolveToCwd(path || ".", cwd);
                        const effectiveLimit = limit ?? DEFAULT_LIMIT;
                        // Check if path exists.
                        if (!(await ops.exists(dirPath))) {
                            reject(new Error(`Path not found: ${dirPath}`));
                            return;
                        }
                        // Check if path is a directory.
                        const stat = await ops.stat(dirPath);
                        if (!stat.isDirectory()) {
                            reject(new Error(`Not a directory: ${dirPath}`));
                            return;
                        }
                        // Read directory entries.
                        let entries;
                        try {
                            entries = await ops.readdir(dirPath);
                        }
                        catch (e) {
                            reject(new Error(`Cannot read directory: ${e.message}`));
                            return;
                        }
                        // Sort alphabetically, case-insensitive.
                        entries.sort((a, b) => a.toLowerCase().localeCompare(b.toLowerCase()));
                        // Format entries with directory indicators.
                        const results = [];
                        let entryLimitReached = false;
                        for (const entry of entries) {
                            if (results.length >= effectiveLimit) {
                                entryLimitReached = true;
                                break;
                            }
                            const fullPath = nodePath.join(dirPath, entry);
                            let suffix = "";
                            try {
                                const entryStat = await ops.stat(fullPath);
                                if (entryStat.isDirectory())
                                    suffix = "/";
                            }
                            catch {
                                // Skip entries we cannot stat.
                                continue;
                            }
                            results.push(entry + suffix);
                        }
                        signal?.removeEventListener("abort", onAbort);
                        if (results.length === 0) {
                            resolve({ content: [{ type: "text", text: "(empty directory)" }], details: undefined });
                            return;
                        }
                        const rawOutput = results.join("\n");
                        // Apply byte truncation. There is no separate line limit because entry count is already capped.
                        const truncation = truncateHead(rawOutput, { maxLines: Number.MAX_SAFE_INTEGER });
                        let output = truncation.content;
                        const details = {};
                        // Build actionable notices for truncation and entry limits.
                        const notices = [];
                        if (entryLimitReached) {
                            notices.push(`${effectiveLimit} entries limit reached. Use limit=${effectiveLimit * 2} for more`);
                            details.entryLimitReached = effectiveLimit;
                        }
                        if (truncation.truncated) {
                            notices.push(`${formatSize(DEFAULT_MAX_BYTES)} limit reached`);
                            details.truncation = truncation;
                        }
                        if (notices.length > 0) {
                            output += `\n\n[${notices.join(". ")}]`;
                        }
                        resolve({
                            content: [{ type: "text", text: output }],
                            details: Object.keys(details).length > 0 ? details : undefined,
                        });
                    }
                    catch (e) {
                        signal?.removeEventListener("abort", onAbort);
                        reject(e);
                    }
                })();
            });
        },
        renderCall(args, theme, context) {
            const text = context.lastComponent ?? new Text("", 0, 0);
            text.setText(formatLsCall(args, theme, context.cwd));
            return text;
        },
        renderResult(result, options, theme, context) {
            const text = context.lastComponent ?? new Text("", 0, 0);
            text.setText(formatLsResult(result, options, theme, context.showImages));
            return text;
        },
    };
}
export function createLsTool(cwd, options) {
    return wrapToolDefinition(createLsToolDefinition(cwd, options));
}
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