//
//  AgentSkill.swift
//  Confab
//
//  SKILL.md-style behavioral skills — markdown instruction files injected into the system prompt
//
// SPDX-License-Identifier: PolyForm-Noncommercial-1.0.0
// Copyright (C) 2026 Rune Olsen
//
// This file is part of Confab.
//
// Confab is licensed under the PolyForm Noncommercial License 1.0.0.
// You may use, study, modify, and share it for any noncommercial
// purpose. Commercial use — including selling Confab or any part of
// it, standalone or bundled into another product or service —
// requires a separate commercial license from the copyright holder.
//
// See the LICENSE file or
// <https://polyformproject.org/licenses/noncommercial/1.0.0> for
// the full license text. For commercial licensing, contact Rune
// Olsen via <https://confab.no>.


import Foundation

struct AgentSkill: Codable, Identifiable {
    var id: UUID
    var name: String              // display name, e.g. "Code Review"
    var skillDescription: String  // short summary shown in the list
    var content: String           // full markdown content (the actual instructions)
    var isActive: Bool            // when true, injected into the system prompt
    var createdAt: Date
    var updatedAt: Date

    init(id: UUID = UUID(), name: String, skillDescription: String = "", content: String,
         isActive: Bool = true, createdAt: Date = Date(), updatedAt: Date = Date()) {
        self.id = id
        self.name = name
        self.skillDescription = skillDescription
        self.content = content
        self.isActive = isActive
        self.createdAt = createdAt
        self.updatedAt = updatedAt
    }

    /// Extract a brief description from the content if skillDescription is empty
    var resolvedDescription: String {
        guard skillDescription.isEmpty else { return skillDescription }
        // Return first non-heading, non-empty line
        for line in content.components(separatedBy: .newlines) {
            let trimmed = line.trimmingCharacters(in: .whitespaces)
            if !trimmed.isEmpty && !trimmed.hasPrefix("#") {
                return String(trimmed.prefix(100))
            }
        }
        return name
    }

    /// Matches the user's "2nd Brain" skill by name — there's no canonical skill ID,
    /// so this is the only way to recognize it (used to gate the "always trust" bash setting).
    var isSecondBrainSkill: Bool {
        name.trimmingCharacters(in: .whitespacesAndNewlines).caseInsensitiveCompare("2nd Brain") == .orderedSame
    }
}
