import Foundation

/// How a takeaways section is shaped (drives the LLM output shape + rendering).
enum SectionKind: String, Codable, CaseIterable, Identifiable {
    case items       // point + optional who / timestamp / note (decisions, actions, quotes, questions…)
    case bullets     // plain short points
    case paragraph   // a prose block

    var id: String { rawValue }
    var label: String {
        switch self {
        case .items:     return "Attributed items"
        case .bullets:   return "Bulleted list"
        case .paragraph: return "Paragraph"
        }
    }
}

/// One configurable takeaways category in a template.
struct TemplateSection: Codable, Identifiable, Equatable {
    var id: String
    var title: String
    var kind: SectionKind
    var instruction: String      // editable prompt text: what the LLM should extract

    init(id: String = UUID().uuidString, title: String, kind: SectionKind, instruction: String) {
        self.id = id; self.title = title; self.kind = kind; self.instruction = instruction
    }
}

/// How finely to break the transcript into topic sections.
enum TopicGranularity: String, Codable, CaseIterable, Identifiable {
    case coarse, auto, fine
    var id: String { rawValue }
    var label: String {
        switch self { case .coarse: return "Fewer, broader topics"; case .auto: return "Automatic"; case .fine: return "More, finer topics" }
    }
    /// Multiplier applied to the auto target-section count.
    var multiplier: Double {
        switch self { case .coarse: return 0.6; case .auto: return 1.0; case .fine: return 1.7 }
    }
}

/// A recap template: the always-on TLDR + an ordered list of takeaways sections.
/// Fully user-editable in Settings (titles, types, instructions); the analyzer builds
/// the LLM prompt from it and the renderer renders from it, so categories are data,
/// not code.
struct RecapTemplate: Codable, Identifiable, Equatable {
    var id: String
    var name: String
    var includeTLDR: Bool
    var topicGranularity: TopicGranularity
    var sections: [TemplateSection]

    init(id: String = UUID().uuidString, name: String, includeTLDR: Bool = true,
         topicGranularity: TopicGranularity = .auto, sections: [TemplateSection]) {
        self.id = id; self.name = name; self.includeTLDR = includeTLDR
        self.topicGranularity = topicGranularity; self.sections = sections
    }

    // MARK: - Built-in defaults (seeded once; all editable thereafter)

    static var builtIns: [RecapTemplate] { [internalMeeting, oneOnOne, companyCall] }

    static var internalMeeting: RecapTemplate {
        RecapTemplate(id: "builtin.internal", name: "Internal Meeting", sections: [
            .init(id: "internal.decisions", title: "Decisions", kind: .items,
                  instruction: "Things explicitly decided or agreed. Only clear commitments (\"we'll do X\", \"let's go with Y\"), not casual mentions. text = the decision; who = who agreed; when = the timestamp."),
            .init(id: "internal.actions", title: "Action Items", kind: .items,
                  instruction: "Explicit ownership (\"I'll send the doc\", \"Matt will follow up\"), not vague \"someone should\". text = the action in imperative form; who = the owner; note = a due date if mentioned; when = the timestamp."),
            .init(id: "internal.questions", title: "Open Questions", kind: .items,
                  instruction: "Questions raised that were NOT clearly answered. Skip rhetorical or answered ones. text = the question, self-contained; who = who raised it."),
            .init(id: "internal.quotes", title: "Key Quotes", kind: .items,
                  instruction: "3-6 pivotal or insightful statements worth surfacing verbatim. text = the quote (4-30 words); who = the speaker; when = the timestamp; note = why it's notable."),
        ])
    }

    static var oneOnOne: RecapTemplate {
        RecapTemplate(id: "builtin.oneonone", name: "1:1", sections: [
            .init(id: "1on1.takeaways", title: "Key Takeaways", kind: .bullets,
                  instruction: "The main points and conclusions from the conversation, as concise bullets."),
            .init(id: "1on1.actions", title: "Action Items", kind: .items,
                  instruction: "Anything either person committed to do. text = the action; who = the owner; note = a due date if mentioned."),
            .init(id: "1on1.followups", title: "Follow-ups", kind: .bullets,
                  instruction: "Things to revisit or circle back on next time."),
        ])
    }

    static var companyCall: RecapTemplate {
        RecapTemplate(id: "builtin.company", name: "Company / Sales Call", sections: [
            .init(id: "company.takeaways", title: "Key Takeaways", kind: .bullets,
                  instruction: "The most important points from the call, as concise bullets."),
            .init(id: "company.needs", title: "Their Asks & Needs", kind: .bullets,
                  instruction: "What the other party wants, needs, or is trying to solve."),
            .init(id: "company.objections", title: "Objections & Concerns", kind: .items,
                  instruction: "Concerns, hesitations, or objections raised. text = the concern; who = who raised it."),
            .init(id: "company.next", title: "Next Steps", kind: .items,
                  instruction: "Agreed next steps. text = the step; who = the owner; note = timing if mentioned; when = the timestamp."),
        ])
    }
}