<template>
  <el-form
    :model="form"
    :rules="rules"
    ref="loginFormRef"
    class="login-form"
    label-position="top"
    @submit.prevent="onSubmit"
  >
    <el-form-item prop="email" :label="$t('login.emailLabel')">
      <el-input
        v-model="form.email"
        :placeholder="$t('login.emailPlaceholder')"
        clearable
      >
        <template #prefix>
          <img src="/youxiang.svg" alt="email" class="input-icon-svg" />
        </template>
      </el-input>
    </el-form-item>
    <el-form-item prop="password" :label="$t('login.passwordLabel')">
      <el-input
        v-model="form.password"
        :placeholder="$t('login.passwordPlaceholder')"
        show-password
        clearable
      >
        <template #prefix>
          <img src="/mima.svg" alt="password" class="input-icon-svg" />
        </template>
      </el-input>
    </el-form-item>
    <el-form-item>
      <div class="remember-container">
        <el-checkbox v-model="form.remember"
          >{{ $t("login.remember") }}
        </el-checkbox>
        <div class="auth-links">
          <el-link
            @click="goToForgotPassword"
            type="primary"
            style="cursor: pointer; color: #f56c6c"
          >
            {{ $t("login.forgot") }}
          </el-link>
          <el-link
            @click="goToGoActivate"
            type="warning"
            style="margin-left: 16px; cursor: pointer; color: #1e6fff"
          >
            {{ $t("login.notActivated") }}
          </el-link>
        </div>
      </div>
    </el-form-item>

    <el-form-item>
      <el-button
        type="primary"
        class="login-btn"
        @click="onSubmit"
        :loading="authStore.loading"
        round
        native-type="button"
      >
        {{ $t("login.loginBtn") }}
      </el-button>
    </el-form-item>
  </el-form>
</template>

<script setup lang="ts">
import { ref, reactive, computed } from "vue";
import { useRouter } from "vue-router";
import { useI18n } from "vue-i18n";
import { ElMessage, type FormInstance, type FormRules } from "element-plus";
import { useAuthStore } from "@/stores/auth";
import { bindWechat } from "@/api/wechat";

const router = useRouter();
const { t } = useI18n();
const authStore = useAuthStore();

const loginFormRef = ref<FormInstance>();

const form = reactive({
  email: "",
  password: "",
  remember: false,
});

const rules = computed<FormRules>(() => ({
  email: [
    {
      required: true,
      message: t("login.emailRequired"),
      trigger: "blur",
    },
    {
      validator: (_rule: any, value: string, callback: any) => {
        const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
        if (value && !emailRegex.test(value)) {
          callback(new Error(t("login.emailInvalid")));
        } else {
          callback();
        }
      },
      trigger: "blur",
    },
  ],
  password: [
    {
      required: true,
      message: t("login.passwordRequired"),
      trigger: "blur",
    },
  ],
}));

const onSubmit = async () => {
  try {
    // 清除之前的错误
    authStore.clearError();

    // 验证表单
    if (!loginFormRef.value) return;
    const valid = await loginFormRef.value.validate();
    if (!valid) return;

    // 调用登录action
    const result = await authStore.login({
      email: form.email,
      password: form.password,
      remember: form.remember,
    });

    if (result.success) {
      // 登录成功：若存在待绑定的微信state，自动绑定
      let bindToken: string | null = null;
      try {
        bindToken = sessionStorage.getItem("wechatBindToken");
      } catch (_) {}
      if (bindToken) {
        try {
          await bindWechat({ state: bindToken });
          ElMessage.success(t("login.wechatBindSuccess") || "微信已绑定");
        } catch (e: any) {
          const code = e?.response?.data?.code;
          const msg =
            e?.response?.data?.message ||
            t("login.wechatBindFailed") ||
            "微信绑定失败";
          if (code === "WECHAT_ALREADY_BOUND") {
            // 已被其他账号绑定或冲突
            ElMessage.warning(msg);
          } else {
            ElMessage.error(msg);
          }
        } finally {
          try {
            sessionStorage.removeItem("wechatBindToken");
          } catch (_) {}
        }
      }
      
      // 登录成功，跳转到欢迎页面并传递登录成功标识
      ElMessage.success(t("login.success"));
      
      // 等待一个 tick 确保响应式状态更新完成
      await new Promise(resolve => setTimeout(resolve, 50));
      
      // 使用 replace 而不是 push，避免返回时回到登录页
      try {
        await router.replace({
          path: "/app/welcome",
          query: {
            loginSuccess: "true",
            registerSuccess: "true",
            showReward: "false",
          },
        });
      } catch (err) {
        // 如果跳转失败，尝试直接使用 push
        router.push({
          path: "/app/welcome",
          query: {
            loginSuccess: "true",
            registerSuccess: "true",
            showReward: "false",
          },
        });
      }
    }
  } catch (error) {
    // 网络错误等异常情况，显示错误消息
    ElMessage.error(t("login.loginFailed"));
  }
};

const goToForgotPassword = () => {
  // 如果用户已输入邮箱，通过 query 参数传递
  const query = form.email ? { email: form.email } : {};
  router.push({
    path: "/forgot-password",
    query,
  });
};

const goToGoActivate = () => {
  // 如果用户已输入邮箱，通过 query 参数传递
  const query = form.email ? { email: form.email } : {};
  router.push({
    path: "/go-activate",
    query,
  });
};
</script>

<style scoped lang="scss">
.remember-container {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.login-form {
  margin-top: 16px;

  // 表单标签样式
  :deep(.el-form-item__label) {
    color: #606266;
    font-weight: 500;
    font-size: 14px;
    margin-bottom: 8px;
    padding: 0;
    line-height: 1.5;

    &::before {
      color: #f56c6c;
    }
  }

  // 复选框样式
  :deep(.el-checkbox__label) {
    color: var(--color-text);
    font-size: 14px;
  }

  :deep(.el-checkbox__input.is-checked .el-checkbox__inner) {
    background-color: #409eff;
    border-color: #409eff;
  }

  :deep(.el-checkbox__inner) {
    background-color: transparent;
    border-color: var(--checkbox__inner);
  }

  // 成功状态样式
  :deep(.el-form-item.is-success) {
    .el-input__inner,
    .el-input__inner:focus,
    .el-textarea__inner,
    .el-textarea__inner:focus {
      border-color: #409eff;
    }
  }

  // 输入框前缀图标
  :deep(.el-input__prefix) {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;

    .input-icon-svg {
      margin-left: 10px;
      margin-right: 6px;
      display: block;
    }
  }

  // 聚焦时图标不透明度
  :deep(.el-input.is-focus .el-input__prefix .input-icon-svg) {
    opacity: 1;
  }

  // 输入框样式
  :deep(.el-input__inner) {
    height: 40px;
    font-size: 16px;
    border-radius: 12px;
    background: #ffffff !important;
    color: #606266 !important;
    transition: all 0.3s ease;

    &::placeholder {
      color: #c0c4cc;
      font-size: 16px;
    }
  }
}

// 登录按钮
.login-btn {
  width: 100%;
  height: 44px;
  font-size: 16px;
  font-weight: 500;
  border-radius: 12px;
  background: linear-gradient(135deg, #3399ff 0%, #00c9ff 100%);
  border: none;
  margin-top: 8px;
  box-shadow: 0 2px 8px rgba(51, 153, 255, 0.3);

  &:hover {
    box-shadow: 0 4px 12px rgba(51, 153, 255, 0.4);
  }

  &:active {
    box-shadow: 0 1px 4px rgba(51, 153, 255, 0.3);
  }
}

// 链接区域
.auth-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  font-size: 14px;

  :deep(.el-link) {
    font-size: 14px;
    font-weight: 400;
  }
}

@media (max-width: 540px) {
  .login-form {
    :deep(.el-form-item) {
      margin-bottom: 24px !important;
    }

    :deep(.el-form-item__label) {
      font-size: 17px !important;
      margin-bottom: 10px !important;
    }

    :deep(.el-input__inner) {
      height: 52px !important;
      font-size: 17px !important;

      &::placeholder {
        font-size: 16px !important;
      }
    }

    :deep(.el-input__prefix .input-icon-svg) {
      width: 20px !important;
      height: 20px !important;
    }
  }

  .login-btn {
    height: 54px !important;
    font-size: 19px !important;
    margin-top: 16px !important;
    border-radius: 14px !important;
  }

  .remember-container {
    margin-bottom: 8px !important;

    :deep(.el-checkbox__label) {
      font-size: 16px !important;
    }
    
    :deep(.el-checkbox__inner) {
      width: 18px !important;
      height: 18px !important;
    }
  }

  .auth-links {
    font-size: 16px !important;
    :deep(.el-link) {
      font-size: 16px !important;
    }
  }
}

@media (max-width: 400px) {
  .remember-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .auth-links {
    width: 100%;
    justify-content: space-between;
    margin-top: 4px;

    :deep(.el-link) {
      margin-left: 0 !important;
    }
  }
}

// 图标样式
.input-icon-svg {
  width: 18px;
  height: 18px;
  object-fit: contain;
  flex-shrink: 0;
  opacity: 0.6;
  transition: opacity 0.3s ease;
  vertical-align: middle;
}
</style>