#include "ForgotPasswordDialog.h"
#include "../network/ApiClient.h"

#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QJsonObject>
#include <QMouseEvent>
#include <QMessageBox>
#include <QPainter>
#include <QPen>

// ── 扁平线条图标(与 LoginDialog 相同风格)──────────────────────────────

static QIcon fpMakeFlatIconClose(const QColor& color, int sz = 14) {
 QPixmap pm(sz, sz);
 pm.fill(Qt::transparent);
 QPainter p(&pm);
 p.setRenderHint(QPainter::Antialiasing);
 QPen pen(color, 2, Qt::SolidLine, Qt::RoundCap);
 p.setPen(pen);
 int m = int(sz * 0.22);
 p.drawLine(m, m, sz - m, sz - m);
 p.drawLine(sz - m, m, m, sz - m);
 p.end();
 return QIcon(pm);
}

// ── 构造 ──────────────────────────────────────────────────────────────

ForgotPasswordDialog::ForgotPasswordDialog(QWidget* parent) : QDialog(parent) {
 setFixedSize(340, 420);
 setWindowFlags(Qt::Dialog | Qt::FramelessWindowHint);
 setAttribute(Qt::WA_TranslucentBackground, false);

 m_codeTimer = new QTimer(this);
 m_codeTimer->setInterval(1000);
 connect(m_codeTimer, &QTimer::timeout, this, &ForgotPasswordDialog::onCodeTick);

 setupUi();
}

// ── UI 布局 ──────────────────────────────────────────────────────────

void ForgotPasswordDialog::setupUi() {
 setStyleSheet(
 "QDialog{ background:#0d1117; font-family:\"Microsoft YaHei\",\"Segoe UI\",sans-serif; }"
 "QLineEdit{"
 " background:#161b22; border:1px solid #21262d;"
 " border-radius:6px; padding:8px 10px; font-size:13px; color:#c9d1d9;"
 "}"
 "QLineEdit:focus{ border-color:#00d4ff; }"
 );

 auto* root = new QVBoxLayout(this);
 root->setContentsMargins(0, 0, 0, 0);
 root->setSpacing(0);

 // ── 头部 ─────────────────────────────────────────────────
 auto* header = new QFrame(this);
 header->setObjectName("fpHeader");
 header->setFixedHeight(50);
 header->setStyleSheet(
 "QFrame#fpHeader{"
 " background:qlineargradient(x1:0,y1:0,x2:0,y2:1,stop:0 #0d1e35,stop:1 #0d1117);"
 " border-bottom:1px solid #21262d;"
 "}"
 );

 auto* hdrLay = new QHBoxLayout(header);
 hdrLay->setContentsMargins(20, 0, 12, 0);

 auto* titleLbl = new QLabel("找回密码", header);
 titleLbl->setStyleSheet("font-size:15px; font-weight:700; color:#e6edf3;");

 auto* closeBtn = new QPushButton(header);
 closeBtn->setFixedSize(28, 28);
 closeBtn->setToolTip("关闭");
 closeBtn->setIcon(fpMakeFlatIconClose(QColor("#E2E8F0")));
 closeBtn->setIconSize(QSize(14, 14));
 closeBtn->setStyleSheet(
 "QPushButton{ background:transparent; border:none; border-radius:8px; padding:0; }"
 "QPushButton:hover{ background:#EF4444; }");
 closeBtn->setCursor(Qt::PointingHandCursor);
 connect(closeBtn, &QPushButton::clicked, this, &QDialog::reject);

 hdrLay->addWidget(titleLbl);
 hdrLay->addStretch();
 hdrLay->addWidget(closeBtn);
 root->addWidget(header);

 // ── 内容 ─────────────────────────────────────────────────
 auto* content = new QWidget(this);
 auto* lay = new QVBoxLayout(content);
 lay->setContentsMargins(20, 16, 20, 20);
 lay->setSpacing(10);

 // 提示语
 auto* hint = new QLabel("向账号绑定邮箱发送验证码,验证后可设置新密码。", content);
 hint->setWordWrap(true);
 hint->setStyleSheet("color:#8b949e; font-size:12px;");
 lay->addWidget(hint);

 // 用户名
 m_usernameEdit = new QLineEdit(content);
 m_usernameEdit->setPlaceholderText("用户名");
 lay->addWidget(m_usernameEdit);

 // 验证码行
 auto* codeRow = new QHBoxLayout;
 codeRow->setSpacing(8);
 m_codeEdit = new QLineEdit(content);
 m_codeEdit->setPlaceholderText("邮箱验证码");
 m_sendCodeBtn = new QPushButton("发送验证码", content);
 m_sendCodeBtn->setStyleSheet(
 "QPushButton{ background:#1a2332; color:#00c6a7;"
 " border:1px solid rgba(0,198,167,0.25); border-radius:6px;"
 " padding:8px; font-size:13px; }"
 "QPushButton:hover{ background:#223040; }"
 "QPushButton:disabled{ color:#64748B; border-color:#2D3F55; }");
 m_sendCodeBtn->setCursor(Qt::PointingHandCursor);
 connect(m_sendCodeBtn, &QPushButton::clicked, this, &ForgotPasswordDialog::onSendCodeClicked);
 codeRow->addWidget(m_codeEdit);
 codeRow->addWidget(m_sendCodeBtn);
 lay->addLayout(codeRow);

 // 新密码
 m_newPwdEdit = new QLineEdit(content);
 m_newPwdEdit->setPlaceholderText("新密码(至少8位)");
 m_newPwdEdit->setEchoMode(QLineEdit::Password);
 lay->addWidget(m_newPwdEdit);

 // 确认密码
 m_confirmPwdEdit = new QLineEdit(content);
 m_confirmPwdEdit->setPlaceholderText("确认新密码");
 m_confirmPwdEdit->setEchoMode(QLineEdit::Password);
 lay->addWidget(m_confirmPwdEdit);

 // 状态提示
 m_statusLabel = new QLabel("", content);
 m_statusLabel->setStyleSheet("color:#ff6b6b; font-size:12px;");
 m_statusLabel->setWordWrap(true);
 lay->addWidget(m_statusLabel);

 lay->addStretch();

 // 重置按钮
 m_resetBtn = new QPushButton("重置密码", content);
 m_resetBtn->setFixedHeight(40);
 m_resetBtn->setCursor(Qt::PointingHandCursor);
 m_resetBtn->setStyleSheet(
 "QPushButton{"
 " background:qlineargradient(x1:0,y1:0,x2:1,y2:0,stop:0 #0d6efd,stop:1 #00c6a7);"
 " color:#fff; font-weight:700; font-size:14px;"
 " border:none; border-radius:8px;"
 "}"
 "QPushButton:hover{ opacity:0.9; }"
 "QPushButton:disabled{ background:#2D3F55; color:#64748B; }");
 connect(m_resetBtn, &QPushButton::clicked, this, &ForgotPasswordDialog::onResetClicked);
 lay->addWidget(m_resetBtn);

 root->addWidget(content);
}

// ── 发送验证码 ────────────────────────────────────────────────────────

void ForgotPasswordDialog::onSendCodeClicked() {
 QString user = m_usernameEdit->text().trimmed();
 if (user.isEmpty()) {
 m_statusLabel->setStyleSheet("color:#ff6b6b; font-size:12px;");
 m_statusLabel->setText("请先输入用户名");
 return;
 }
 m_statusLabel->clear();
 m_sendCodeBtn->setEnabled(false);

 QJsonObject req;
 req["username"] = user;
 ApiClient::instance().post("auth/forgot-password/send-code/", req,
 [this](bool ok, const QJsonObject& resp, const QString& err) {
 handleSendCodeResponse(ok, resp, err);
 });
}

void ForgotPasswordDialog::handleSendCodeResponse(bool ok, const QJsonObject&, const QString& err) {
 if (!ok) {
 m_statusLabel->setStyleSheet("color:#ff6b6b; font-size:12px;");
 m_statusLabel->setText("发送失败: " + err);
 m_sendCodeBtn->setEnabled(true);
 return;
 }
 m_statusLabel->setStyleSheet("color:#34D399; font-size:12px;");
 m_statusLabel->setText("验证码已发送至注册邮箱");
 m_countdown = 60;
 m_codeTimer->start();
 onCodeTick();
}

void ForgotPasswordDialog::onCodeTick() {
 if (m_countdown <= 0) {
 m_codeTimer->stop();
 m_sendCodeBtn->setEnabled(true);
 m_sendCodeBtn->setText("发送验证码");
 return;
 }
 m_sendCodeBtn->setText(QString("%1s").arg(m_countdown));
 --m_countdown;
}

// ── 重置密码 ──────────────────────────────────────────────────────────

void ForgotPasswordDialog::onResetClicked() {
 QString user = m_usernameEdit->text().trimmed();
 QString code = m_codeEdit->text().trimmed();
 QString newPwd = m_newPwdEdit->text();
 QString confPwd = m_confirmPwdEdit->text();

 m_statusLabel->setStyleSheet("color:#ff6b6b; font-size:12px;");

 if (user.isEmpty() || code.isEmpty() || newPwd.isEmpty()) {
 m_statusLabel->setText("请填写用户名、验证码和新密码");
 return;
 }
 if (newPwd.length() < 8) {
 m_statusLabel->setText("新密码至少8位");
 return;
 }
 if (newPwd != confPwd) {
 m_statusLabel->setText("两次新密码不一致");
 return;
 }

 m_resetBtn->setEnabled(false);
 m_resetBtn->setText("提交中...");
 m_statusLabel->clear();

 QJsonObject req;
 req["username"] = user;
 req["code"] = code;
 req["new_password"] = newPwd;
 ApiClient::instance().post("auth/forgot-password/reset/", req,
 [this](bool ok, const QJsonObject& resp, const QString& err) {
 handleResetResponse(ok, resp, err);
 });
}

void ForgotPasswordDialog::handleResetResponse(bool ok, const QJsonObject&, const QString& err) {
 m_resetBtn->setEnabled(true);
 m_resetBtn->setText("重置密码");
 if (!ok) {
 m_statusLabel->setStyleSheet("color:#ff6b6b; font-size:12px;");
 m_statusLabel->setText("重置失败: " + err);
 return;
 }
 QMessageBox::information(this, "成功", "密码已重置,请用新密码登录。");
 accept();
}

// ── 拖动 ─────────────────────────────────────────────────────────────

void ForgotPasswordDialog::mousePressEvent(QMouseEvent* e) {
 if (e->button() == Qt::LeftButton) {
 m_isDragging = true;
 m_dragPos = e->globalPosition().toPoint() - frameGeometry().topLeft();
 }
}
void ForgotPasswordDialog::mouseMoveEvent(QMouseEvent* e) {
 if (m_isDragging && (e->buttons() & Qt::LeftButton))
 move(e->globalPosition().toPoint() - m_dragPos);
}
void ForgotPasswordDialog::mouseReleaseEvent(QMouseEvent*) {
 m_isDragging = false;
}