/**
 * Resolve configuration values that may be shell commands, environment variables, or literals.
 * Used by auth-storage.ts and model-registry.ts.
 */
import { execSync, spawnSync } from "child_process";
import { getShellConfig } from "../utils/shell.js";
// Cache for shell command results (persists for process lifetime)
const commandResultCache = new Map();
const ENV_VAR_NAME_RE = /^[A-Za-z_][A-Za-z0-9_]*$/;
const ENV_VAR_NAME_PREFIX_RE = /^[A-Za-z_][A-Za-z0-9_]*/;
function appendLiteral(parts, value) {
    if (!value)
        return;
    const previousPart = parts[parts.length - 1];
    if (previousPart?.type === "literal") {
        previousPart.value += value;
        return;
    }
    parts.push({ type: "literal", value });
}
function parseConfigValueTemplate(config) {
    const parts = [];
    let index = 0;
    while (index < config.length) {
        const dollarIndex = config.indexOf("$", index);
        if (dollarIndex < 0) {
            appendLiteral(parts, config.slice(index));
            break;
        }
        appendLiteral(parts, config.slice(index, dollarIndex));
        const nextChar = config[dollarIndex + 1];
        if (nextChar === "$" || nextChar === "!") {
            appendLiteral(parts, nextChar);
            index = dollarIndex + 2;
            continue;
        }
        if (nextChar === "{") {
            const endIndex = config.indexOf("}", dollarIndex + 2);
            if (endIndex < 0) {
                appendLiteral(parts, "$");
                index = dollarIndex + 1;
                continue;
            }
            const name = config.slice(dollarIndex + 2, endIndex);
            if (ENV_VAR_NAME_RE.test(name)) {
                parts.push({ type: "env", name });
            }
            else {
                appendLiteral(parts, config.slice(dollarIndex, endIndex + 1));
            }
            index = endIndex + 1;
            continue;
        }
        const match = config.slice(dollarIndex + 1).match(ENV_VAR_NAME_PREFIX_RE);
        if (match) {
            parts.push({ type: "env", name: match[0] });
            index = dollarIndex + 1 + match[0].length;
            continue;
        }
        appendLiteral(parts, "$");
        index = dollarIndex + 1;
    }
    return parts;
}
function parseConfigValueReference(config) {
    if (config.startsWith("!")) {
        return { type: "command", config };
    }
    return { type: "template", parts: parseConfigValueTemplate(config) };
}
function resolveEnvConfigValue(name, env) {
    return env?.[name] || process.env[name] || undefined;
}
function getTemplateEnvVarNames(parts) {
    const names = [];
    for (const part of parts) {
        if (part.type !== "env" || names.includes(part.name))
            continue;
        names.push(part.name);
    }
    return names;
}
function resolveTemplate(parts, env) {
    let resolved = "";
    for (const part of parts) {
        if (part.type === "literal") {
            resolved += part.value;
            continue;
        }
        const envValue = resolveEnvConfigValue(part.name, env);
        if (envValue === undefined)
            return undefined;
        resolved += envValue;
    }
    return resolved;
}
export function getConfigValueEnvVarName(config) {
    const reference = parseConfigValueReference(config);
    if (reference.type !== "template")
        return undefined;
    return reference.parts.length === 1 && reference.parts[0]?.type === "env" ? reference.parts[0].name : undefined;
}
export function getConfigValueEnvVarNames(config) {
    const reference = parseConfigValueReference(config);
    return reference.type === "template" ? getTemplateEnvVarNames(reference.parts) : [];
}
export function getMissingConfigValueEnvVarNames(config, env) {
    return getConfigValueEnvVarNames(config).filter((name) => resolveEnvConfigValue(name, env) === undefined);
}
export function isCommandConfigValue(config) {
    return parseConfigValueReference(config).type === "command";
}
export function isConfigValueConfigured(config, env) {
    return getMissingConfigValueEnvVarNames(config, env).length === 0;
}
/**
 * Resolve a config value (API key, header value, etc.) to an actual value.
 * - If starts with "!", executes the rest as a shell command and uses stdout (cached)
 * - Interpolates "$ENV_VAR" or "${ENV_VAR}" references with the named environment variable
 * - In non-command values, "$$" escapes a literal "$" and "$!" escapes a literal "!"
 * - Otherwise treats the value as a literal
 */
export function resolveConfigValue(config, env) {
    const reference = parseConfigValueReference(config);
    if (reference.type === "command") {
        return executeCommand(reference.config);
    }
    return resolveTemplate(reference.parts, env);
}
function executeWithConfiguredShell(command) {
    try {
        const { shell, args, commandTransport } = getShellConfig();
        const commandFromStdin = commandTransport === "stdin";
        const result = spawnSync(shell, commandFromStdin ? args : [...args, command], {
            encoding: "utf-8",
            input: commandFromStdin ? command : undefined,
            timeout: 10000,
            stdio: [commandFromStdin ? "pipe" : "ignore", "pipe", "ignore"],
            shell: false,
            windowsHide: true,
        });
        if (result.error) {
            const error = result.error;
            if (error.code === "ENOENT") {
                return { executed: false, value: undefined };
            }
            return { executed: true, value: undefined };
        }
        if (result.status !== 0) {
            return { executed: true, value: undefined };
        }
        const value = (result.stdout ?? "").trim();
        return { executed: true, value: value || undefined };
    }
    catch {
        return { executed: false, value: undefined };
    }
}
function executeWithDefaultShell(command) {
    try {
        const output = execSync(command, {
            encoding: "utf-8",
            timeout: 10000,
            stdio: ["ignore", "pipe", "ignore"],
        });
        return output.trim() || undefined;
    }
    catch {
        return undefined;
    }
}
function executeCommandUncached(commandConfig) {
    const command = commandConfig.slice(1);
    return process.platform === "win32"
        ? (() => {
            const configuredResult = executeWithConfiguredShell(command);
            return configuredResult.executed ? configuredResult.value : executeWithDefaultShell(command);
        })()
        : executeWithDefaultShell(command);
}
function executeCommand(commandConfig) {
    if (commandResultCache.has(commandConfig)) {
        return commandResultCache.get(commandConfig);
    }
    const result = executeCommandUncached(commandConfig);
    commandResultCache.set(commandConfig, result);
    return result;
}
/**
 * Resolve all header values using the same resolution logic as API keys.
 */
export function resolveConfigValueUncached(config, env) {
    const reference = parseConfigValueReference(config);
    if (reference.type === "command") {
        return executeCommandUncached(reference.config);
    }
    return resolveTemplate(reference.parts, env);
}
export function resolveConfigValueOrThrow(config, description, env) {
    const resolvedValue = resolveConfigValueUncached(config, env);
    if (resolvedValue !== undefined) {
        return resolvedValue;
    }
    const reference = parseConfigValueReference(config);
    if (reference.type === "command") {
        throw new Error(`Failed to resolve ${description} from shell command: ${reference.config.slice(1)}`);
    }
    if (reference.type === "template") {
        const missingEnvVars = getMissingConfigValueEnvVarNames(config, env);
        if (missingEnvVars.length === 1) {
            throw new Error(`Failed to resolve ${description} from environment variable: ${missingEnvVars[0]}`);
        }
        if (missingEnvVars.length > 1) {
            throw new Error(`Failed to resolve ${description} from environment variables: ${missingEnvVars.join(", ")}`);
        }
    }
    throw new Error(`Failed to resolve ${description}`);
}
/**
 * Resolve all header values using the same resolution logic as API keys.
 */
export function resolveHeaders(headers, env) {
    if (!headers)
        return undefined;
    const resolved = {};
    for (const [key, value] of Object.entries(headers)) {
        const resolvedValue = resolveConfigValue(value, env);
        if (resolvedValue) {
            resolved[key] = resolvedValue;
        }
    }
    return Object.keys(resolved).length > 0 ? resolved : undefined;
}
export function resolveHeadersOrThrow(headers, description, env) {
    if (!headers)
        return undefined;
    const resolved = {};
    for (const [key, value] of Object.entries(headers)) {
        resolved[key] = resolveConfigValueOrThrow(value, `${description} header "${key}"`, env);
    }
    return Object.keys(resolved).length > 0 ? resolved : undefined;
}
/** Clear the config value command cache. Exported for testing. */
export function clearConfigValueCache() {
    commandResultCache.clear();
}
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