//
//  Copyright 2026 The InfiniFlow Authors. All Rights Reserved.
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.
//

package handler

import (
	"errors"
	"io"
	"net/http"
	"ragflow/internal/common"
	"ragflow/internal/dao"
	"ragflow/internal/entity"

	"ragflow/internal/service"

	"github.com/gin-gonic/gin"
)

func (h *SystemHandler) ListAPIKeys(c *gin.Context) {
	// Get current user from context
	user, exists := c.Get("user")
	if !exists {
		common.ResponseWithHttpCodeData(c, http.StatusUnauthorized, 401, nil, "Unauthorized")
		return
	}

	userModel, ok := user.(*entity.User)
	if !ok {
		common.ResponseWithHttpCodeData(c, http.StatusInternalServerError, 500, nil, "Invalid user data")
		return
	}

	// Get user's tenant with owner role
	userTenantDAO := dao.NewUserTenantDAO()
	ctx := c.Request.Context()

	tenants, err := userTenantDAO.GetByUserIDAndRole(ctx, dao.DB, userModel.ID, "owner")
	if err != nil || len(tenants) == 0 {
		common.ResponseWithHttpCodeData(c, http.StatusBadRequest, 400, nil, "Tenant not found")
		return
	}

	tenantID := tenants[0].TenantID

	// Get keys for the tenant
	keys, err := h.systemService.ListAPIKeys(ctx, tenantID)
	if err != nil {
		common.ResponseWithHttpCodeData(c, http.StatusInternalServerError, 500, nil, "Failed to list keys")
		return
	}

	common.SuccessWithData(c, keys, "success")
}

func (h *SystemHandler) CreateKey(c *gin.Context) {
	// Get current user from context
	user, exists := c.Get("user")
	if !exists {
		common.ResponseWithHttpCodeData(c, http.StatusUnauthorized, 401, nil, "Unauthorized")
		return
	}

	userModel, ok := user.(*entity.User)
	if !ok {
		common.ResponseWithHttpCodeData(c, http.StatusInternalServerError, 500, nil, "Invalid user data")
		return
	}

	// Get user's tenant with owner role
	userTenantDAO := dao.NewUserTenantDAO()
	ctx := c.Request.Context()

	tenants, err := userTenantDAO.GetByUserIDAndRole(ctx, dao.DB, userModel.ID, "owner")
	if err != nil || len(tenants) == 0 {
		common.ResponseWithHttpCodeData(c, http.StatusBadRequest, 400, nil, "Tenant not found")
		return
	}

	tenantID := tenants[0].TenantID

	// Parse request. An empty body is valid (all fields are optional);
	// ShouldBind reports io.EOF for it.
	var req service.CreateAPIKeyRequest
	if err = c.ShouldBind(&req); err != nil && !errors.Is(err, io.EOF) {
		common.ResponseWithHttpCodeData(c, http.StatusBadRequest, 400, nil, "Invalid request")
		return
	}

	// Create key
	key, err := h.systemService.CreateAPIKey(ctx, tenantID, &req)
	if err != nil {
		common.ResponseWithHttpCodeData(c, http.StatusInternalServerError, 500, nil, "Failed to create key")
		return
	}

	common.SuccessWithData(c, key, "success")
}

func (h *SystemHandler) DeleteKey(c *gin.Context) {
	// Get current user from context
	user, exists := c.Get("user")
	if !exists {
		common.ResponseWithHttpCodeData(c, http.StatusUnauthorized, 401, nil, "Unauthorized")
		return
	}

	userModel, ok := user.(*entity.User)
	if !ok {
		common.ResponseWithHttpCodeData(c, http.StatusInternalServerError, 500, nil, "Invalid user data")
		return
	}
	ctx := c.Request.Context()

	// Get user's tenant with owner role
	userTenantDAO := dao.NewUserTenantDAO()

	tenants, err := userTenantDAO.GetByUserIDAndRole(ctx, dao.DB, userModel.ID, "owner")
	if err != nil || len(tenants) == 0 {
		common.ResponseWithHttpCodeData(c, http.StatusBadRequest, 400, nil, "Tenant not found")
		return
	}

	tenantID := tenants[0].TenantID

	// Get key from path parameter
	key := c.Param("key")
	if key == "" {
		common.ResponseWithHttpCodeData(c, http.StatusBadRequest, 400, nil, "Key is required")
		return
	}

	// Delete key
	if err = h.systemService.DeleteAPIKey(ctx, tenantID, key); err != nil {
		common.ResponseWithHttpCodeData(c, http.StatusInternalServerError, 500, nil, "Failed to delete key")
		return
	}

	common.SuccessWithData(c, true, "success")
}
