#include "app.hpp"
#include <stdexcept>
#include <cassert>

// =========================================================================
// 内部辅助函数
// =========================================================================

std::string ODFManager::connector_type_str(ConnectorType t) {
    switch (t) {
        case ConnectorType::LC:  return "LC";
        case ConnectorType::SC:  return "SC";
        case ConnectorType::MPO: return "MPO";
        default:                 return "UNKNOWN";
    }
}

std::string ODFManager::polish_type_str(PolishType p) {
    switch (p) {
        case PolishType::UPC: return "UPC";
        case PolishType::APC: return "APC";
        default:              return "UNKNOWN";
    }
}

// =========================================================================
// 单元管理
// =========================================================================

void ODFManager::register_unit(const ODFUnitInfo& unit) {
    if (unit.max_capacity_cores > 288) {
        throw std::invalid_argument(
            "ODF unit capacity exceeds 288 cores (constraint violated)");
    }
    if (unit.unit_id.empty()) {
        throw std::invalid_argument("unit_id must not be empty");
    }
    // 检查重复 ID
    for (const auto& existing : units_) {
        if (existing.unit_id == unit.unit_id) {
            throw std::invalid_argument("duplicate unit_id: " + unit.unit_id);
        }
    }
    units_.push_back(unit);
}

const ODFUnitInfo* ODFManager::find_unit(const std::string& unit_id) const {
    for (const auto& u : units_) {
        if (u.unit_id == unit_id) return &u;
    }
    return nullptr;
}

const std::vector<ODFUnitInfo>& ODFManager::all_units() const {
    return units_;
}

// =========================================================================
// 编码生成
// =========================================================================

std::string ODFManager::generate_naming_code(const std::string& site,
                                              const std::string& cabinet,
                                              const std::string& slot) const {
    // 格式: [site]-[cabinet]-[slot]
    // 例如: DC01-RF02-SL05
    std::ostringstream oss;
    oss << site << "-" << cabinet << "-" << slot;
    std::string code = oss.str();

    // 约束：长度不超过 64 字符
    if (code.size() > 64) {
        // 截断到 64 字节，并尽可能保留尾部标识
        code = code.substr(0, 61) + "...";
    }

    // 保证全局唯一：检查是否与已注册某单元的 unit_id 重复
    // 实际生产可通过数据库约束保证，此处仅做运行时提醒
    for (const auto& u : units_) {
        if (u.unit_id == code) {
            // 若冲突则追加时间戳后缀（简单去重）
            std::time_t now = std::time(nullptr);
            std::tm* tm = std::localtime(&now);
            std::ostringstream suffix;
            suffix << std::put_time(tm, "_%H%M%S");
            code += suffix.str();
            if (code.size() > 64) code = code.substr(0, 64);
            break;
        }
    }
    return code;
}

// =========================================================================
// 典型配置
// =========================================================================

TypicalConfig ODFManager::get_typical_config(const std::string& scene_type) const {
    for (const auto& cfg : configs_) {
        if (cfg.scene_name.find(scene_type) != std::string::npos) {
            return cfg;
        }
    }
    // 未找到时返回空配置
    return TypicalConfig{};
}

void ODFManager::register_typical_config(const TypicalConfig& cfg) {
    configs_.push_back(cfg);
}

// =========================================================================
// 兼容性校验
// =========================================================================

bool ODFManager::validate_adapter_compatibility(const AdapterSpec& a,
                                                 const AdapterSpec& b) const {
    // 1) 接口类型必须相同
    if (a.interface_type != b.interface_type) {
        return false;
    }
    // 2) 端面类型允许混合（UPC ↔ APC 可以物理插入）
    //    但回波损耗会受短板影响；此处仅校验物理兼容
    // 3) 额外检查：连接器等级不同时，物理上仍可插拔
    //    不阻塞对接
    return true;
}

// =========================================================================
// 报告与标签
// =========================================================================

std::string ODFManager::export_milestone_schedule() const {
    if (milestones_.empty()) {
        return "[No milestones scheduled]\n";
    }

    std::ostringstream oss;
    oss << "+-----+----------------------+------------+------------+"
        << "----------------------+------+\n";
    oss << "| #   | Phase                | Start      | End        |"
        << " Deliverable          | Done |\n";
    oss << "+-----+----------------------+------------+------------+"
        << "----------------------+------+\n";

    int idx = 0;
    for (const auto& ms : milestones_) {
        ++idx;
        oss << "| " << std::left << std::setw(3) << idx << " "
            << "| " << std::setw(20) << ms.phase_name << " "
            << "| " << std::setw(10) << ms.start_date << " "
            << "| " << std::setw(10) << ms.end_date << " "
            << "| " << std::setw(20) << ms.deliverable << " "
            << "| " << (ms.is_completed ? " Y  " : " N  ")
            << "|\n";
    }
    oss << "+-----+----------------------+------------+------------+"
        << "----------------------+------+\n";
    return oss.str();
}

void ODFManager::add_milestone(const Milestone& ms) {
    milestones_.push_back(ms);
}

const std::vector<Milestone>& ODFManager::milestones() const {
    return milestones_;
}

std::string ODFManager::print_label(const std::string& unit_id) const {
    const ODFUnitInfo* unit = find_unit(unit_id);
    if (!unit) {
        return "[ERROR] Unit not found: " + unit_id + "\n";
    }

    std::ostringstream oss;
    oss << "+====================================+\n";
    oss << "|  ODF Unit Label                    |\n";
    oss << "+====================================+\n";
    oss << "| ID:      " << std::left << std::setw(27) << unit->unit_id << "|\n";
    oss << "| Model:   " << std::setw(27) << unit->model_name << "|\n";
    oss << "| Location:" << std::setw(27) << unit->location << "|\n";
    oss << "| Mfr:     " << std::setw(27) << unit->manufacturer << "|\n";
    oss << "| Date:    " << std::setw(27) << unit->production_date << "|\n";
    oss << "| Cores:   " << std::setw(27) << unit->max_capacity_cores << "|\n";
    oss << "+------------------------------------+\n";
    oss << "| [QR CODE]  " << unit->unit_id << "                |\n";
    oss << "+====================================+\n";
    return oss.str();
}