// mime-todo/lib/issue.ts
// Valid status transitions
const VALID_TRANSITIONS = {
    "open": ["in-progress", "hold", "cancelled"],
    "in-progress": ["done", "hold", "open", "cancelled"],
    "hold": ["open", "in-progress", "cancelled"],
    "done": ["open"],
    "cancelled": ["open"],
};
export function validateStatusTransition(from, to) {
    if (from === to)
        return null; // no-op is fine
    const allowed = VALID_TRANSITIONS[from];
    if (!allowed?.includes(to)) {
        return `Invalid status transition: ${from} → ${to}. Allowed from ${from}: ${allowed?.join(", ") ?? "none"}`;
    }
    return null;
}
export function parseRelationships(text) {
    const relationships = {};
    // Handle empty relationships
    if (!text || text.trim() === "") {
        return relationships;
    }
    // Simple parsing for format like "dependsOn:3"
    const parts = text.split(/,\s*/).filter(p => p.trim() !== "");
    for (const part of parts) {
        const [key, value] = part.split(":").map(s => s.trim());
        if (key && value) {
            relationships[key] = value.split(/[\s]+/).map(Number).filter(n => !isNaN(n));
        }
    }
    return relationships;
}
export function parseIssue(text) {
    const lines = text.split(/\r?\n/);
    const issue = {};
    let inDescription = false;
    const descLines = [];
    const bodyLines = [];
    for (const line of lines) {
        if (!inDescription) {
            if (line.startsWith("ID:"))
                issue.id = Number(line.slice(3).trim());
            else if (line.startsWith("Type:"))
                issue.type = line.slice(5).trim();
            else if (line.startsWith("Title:"))
                issue.title = line.slice(6).trim();
            else if (line.startsWith("Status:"))
                issue.status = line.slice(7).trim();
            else if (line.startsWith("Priority:"))
                issue.priority = line.slice(9).trim();
            else if (line.startsWith("Created:"))
                issue.created = line.slice(8).trim();
            else if (line.startsWith("DueStart:"))
                issue.dueStart = line.slice(9).trim();
            else if (line.startsWith("DueEnd:"))
                issue.dueEnd = line.slice(7).trim();
            else if (line.startsWith("Module:"))
                issue.module = line.slice("Module:".length).trim();
            else if (line.startsWith("Relationships:")) {
                const rel = line.slice("Relationships:".length).trim();
                issue.relationships = parseRelationships(rel);
            }
            else if (line.startsWith("Description:")) {
                inDescription = true;
                descLines.push(line.slice("Description:".length).trim());
            }
        }
        else {
            // Description continuation
            if (line.trim() === "") {
                // blank line ends description
                inDescription = false;
                continue;
            }
            if (/^\s+/.test(line)) {
                descLines.push(line.trim());
                continue;
            }
            // first non-indented line ends description
            inDescription = false;
            bodyLines.push(line);
        }
    }
    issue.description = descLines.join("\n");
    issue.body = bodyLines.join("\n");
    return issue;
}