package device

import (
	"context"
	"errors"
	"strconv"

	"git.huangwc.com/pig/pig-farm-controller/internal/app/controller"
	"git.huangwc.com/pig/pig-farm-controller/internal/app/dto"
	"git.huangwc.com/pig/pig-farm-controller/internal/app/service"
	"git.huangwc.com/pig/pig-farm-controller/internal/infra/logs"

	"github.com/labstack/echo/v4"
	"gorm.io/gorm"
)

// DeviceController 设备控制器
type DeviceController struct {
	ctx           context.Context
	deviceService service.DeviceService
}

// NewDeviceController 创建一个新的设备控制器实例
func NewDeviceController(
	ctx context.Context,
	deviceService service.DeviceService,
) *DeviceController {
	return &DeviceController{
		ctx:           ctx,
		deviceService: deviceService,
	}
}

// CreateDevice godoc
// @Summary      创建新设备
// @Description  根据提供的信息创建一个新设备
// @Tags         设备管理
// @Security     BearerAuth
// @Accept       json
// @Produce      json
// @Param        device body dto.CreateDeviceRequest true "设备信息"
// @Success      200 {object} controller.Response{data=dto.DeviceResponse}
// @Router       /api/v1/devices [post]
func (c *DeviceController) CreateDevice(ctx echo.Context) error {
	reqCtx, logger := logs.Trace(ctx.Request().Context(), c.ctx, "CreateDevice")

	const actionType = "创建设备"
	var req dto.CreateDeviceRequest
	if err := ctx.Bind(&req); err != nil {
		logger.Errorf("%s: 参数绑定失败: %v", actionType, err)
		return controller.SendErrorWithAudit(ctx, controller.CodeBadRequest, "无效的请求体: "+err.Error(), actionType, "请求体绑定失败", req)
	}

	resp, err := c.deviceService.CreateDevice(reqCtx, &req)
	if err != nil {
		logger.Errorf("%s: 服务层创建失败: %v", actionType, err)
		return controller.SendErrorWithAudit(ctx, controller.CodeInternalError, "创建设备失败: "+err.Error(), actionType, "服务层创建失败", req)
	}

	logger.Infof("%s: 设备创建成功, ID: %d", actionType, resp.ID)
	return controller.SendSuccessWithAudit(ctx, controller.CodeCreated, "设备创建成功", resp, actionType, "设备创建成功", resp)
}

// GetDevice godoc
// @Summary      获取设备信息
// @Description  根据设备ID获取单个设备的详细信息
// @Tags         设备管理
// @Security     BearerAuth
// @Produce      json
// @Param        id path string true "设备ID"
// @Success      200 {object} controller.Response{data=dto.DeviceResponse}
// @Router       /api/v1/devices/{id} [get]
func (c *DeviceController) GetDevice(ctx echo.Context) error {
	reqCtx, logger := logs.Trace(ctx.Request().Context(), c.ctx, "GetDevice")

	const actionType = "获取设备"
	deviceID := ctx.Param("id")

	id, err := strconv.ParseUint(deviceID, 10, 64)
	if err != nil {
		logger.Errorf("%s: 无效的ID: %s", actionType, deviceID)
		return controller.SendErrorWithAudit(ctx, controller.CodeBadRequest, "无效的ID: "+deviceID, actionType, "无效的ID", deviceID)
	}

	resp, err := c.deviceService.GetDevice(reqCtx, uint32(id))
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			logger.Warnf("%s: 设备不存在, ID: %s", actionType, deviceID)
			return controller.SendErrorWithAudit(ctx, controller.CodeNotFound, "设备未找到", actionType, "设备不存在", deviceID)
		}
		logger.Errorf("%s: 服务层获取失败: %v, ID: %s", actionType, err, deviceID)
		return controller.SendErrorWithAudit(ctx, controller.CodeInternalError, "获取设备信息失败: "+err.Error(), actionType, "服务层获取失败", deviceID)
	}

	logger.Infof("%s: 获取设备信息成功, ID: %d", actionType, resp.ID)
	return controller.SendSuccessWithAudit(ctx, controller.CodeSuccess, "获取设备信息成功", resp, actionType, "获取设备信息成功", resp)
}

// ListDevices godoc
// @Summary      获取设备列表
// @Description  获取系统中所有设备的列表
// @Tags         设备管理
// @Security     BearerAuth
// @Produce      json
// @Success      200 {object} controller.Response{data=[]dto.DeviceResponse}
// @Router       /api/v1/devices [get]
func (c *DeviceController) ListDevices(ctx echo.Context) error {
	reqCtx, logger := logs.Trace(ctx.Request().Context(), c.ctx, "ListDevices")

	const actionType = "获取设备列表"
	resp, err := c.deviceService.ListDevices(reqCtx)
	if err != nil {
		logger.Errorf("%s: 服务层获取列表失败: %v", actionType, err)
		return controller.SendErrorWithAudit(ctx, controller.CodeInternalError, "获取设备列表失败: "+err.Error(), actionType, "服务层获取列表失败", nil)
	}

	logger.Infof("%s: 获取设备列表成功, 数量: %d", actionType, len(resp))
	return controller.SendSuccessWithAudit(ctx, controller.CodeSuccess, "获取设备列表成功", resp, actionType, "获取设备列表成功", resp)
}

// UpdateDevice godoc
// @Summary      更新设备信息
// @Description  根据设备ID更新一个已存在的设备信息
// @Tags         设备管理
// @Security     BearerAuth
// @Accept       json
// @Produce      json
// @Param        id path string true "设备ID"
// @Param        device body dto.UpdateDeviceRequest true "要更新的设备信息"
// @Success      200 {object} controller.Response{data=dto.DeviceResponse}
// @Router       /api/v1/devices/{id} [put]
func (c *DeviceController) UpdateDevice(ctx echo.Context) error {
	reqCtx, logger := logs.Trace(ctx.Request().Context(), c.ctx, "UpdateDevice")

	const actionType = "更新设备"
	deviceID := ctx.Param("id")

	var req dto.UpdateDeviceRequest
	if err := ctx.Bind(&req); err != nil {
		logger.Errorf("%s: 参数绑定失败: %v", actionType, err)
		return controller.SendErrorWithAudit(ctx, controller.CodeBadRequest, "无效的请求体: "+err.Error(), actionType, "请求体绑定失败", req)
	}

	id, err := strconv.ParseUint(deviceID, 10, 64)
	if err != nil {
		logger.Errorf("%s: 无效的ID: %s", actionType, deviceID)
		return controller.SendErrorWithAudit(ctx, controller.CodeBadRequest, "无效的ID: "+deviceID, actionType, "无效的ID", deviceID)
	}

	resp, err := c.deviceService.UpdateDevice(reqCtx, uint32(id), &req)
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			logger.Warnf("%s: 设备不存在, ID: %s", actionType, deviceID)
			return controller.SendErrorWithAudit(ctx, controller.CodeNotFound, "设备未找到", actionType, "设备不存在", deviceID)
		}
		logger.Errorf("%s: 服务层更新失败: %v, ID: %s", actionType, err, deviceID)
		return controller.SendErrorWithAudit(ctx, controller.CodeInternalError, "更新设备失败: "+err.Error(), actionType, "服务层更新失败", deviceID)
	}

	logger.Infof("%s: 设备更新成功, ID: %d", actionType, resp.ID)
	return controller.SendSuccessWithAudit(ctx, controller.CodeSuccess, "设备更新成功", resp, actionType, "设备更新成功", resp)
}

// DeleteDevice godoc
// @Summary      删除设备
// @Description  根据设备ID删除一个设备（软删除）
// @Tags         设备管理
// @Security     BearerAuth
// @Produce      json
// @Param        id path string true "设备ID"
// @Success      200 {object} controller.Response
// @Router       /api/v1/devices/{id} [delete]
func (c *DeviceController) DeleteDevice(ctx echo.Context) error {
	reqCtx, logger := logs.Trace(ctx.Request().Context(), c.ctx, "DeleteDevice")

	const actionType = "删除设备"
	deviceID := ctx.Param("id")

	id, err := strconv.ParseUint(deviceID, 10, 64)
	if err != nil {
		logger.Errorf("%s: 无效的ID: %s", actionType, deviceID)
		return controller.SendErrorWithAudit(ctx, controller.CodeBadRequest, "无效的ID: "+deviceID, actionType, "无效的ID", deviceID)
	}

	if err := c.deviceService.DeleteDevice(reqCtx, uint32(id)); err != nil {
		switch {
		case errors.Is(err, gorm.ErrRecordNotFound):
			logger.Warnf("%s: 设备不存在, ID: %s", actionType, deviceID)
			return controller.SendErrorWithAudit(ctx, controller.CodeNotFound, "设备未找到", actionType, "设备不存在", deviceID)
		case errors.Is(err, service.ErrDeviceInUse):
			logger.Warnf("%s: 尝试删除正在被使用的设备, ID: %s", actionType, deviceID)
			// 返回 409 Conflict 状态码，表示请求与服务器当前状态冲突
			return controller.SendErrorWithAudit(ctx, controller.CodeConflict, err.Error(), actionType, "设备正在被使用", deviceID)
		default:
			logger.Errorf("%s: 服务层删除失败: %v, ID: %s", actionType, err, deviceID)
			return controller.SendErrorWithAudit(ctx, controller.CodeInternalError, "删除设备失败: "+err.Error(), actionType, "服务层删除失败", deviceID)
		}
	}

	logger.Infof("%s: 设备删除成功, ID: %s", actionType, deviceID)
	return controller.SendSuccessWithAudit(ctx, controller.CodeSuccess, "设备删除成功", nil, actionType, "设备删除成功", deviceID)
}

// ManualControl godoc
// @Summary      手动控制设备
// @Description  根据设备ID和指定的动作（开启或关闭）来手动控制设备
// @Tags         设备管理
// @Security     BearerAuth
// @Accept       json
// @Produce      json
// @Param        id path string true "设备ID"
// @Param        manualControl body dto.ManualControlDeviceRequest true "手动控制指令"
// @Success      200 {object} controller.Response
// @Router       /api/v1/devices/manual-control/{id} [post]
func (c *DeviceController) ManualControl(ctx echo.Context) error {
	reqCtx, logger := logs.Trace(ctx.Request().Context(), c.ctx, "ManualControlDevice")

	const actionType = "手动控制设备"
	deviceID := ctx.Param("id")

	var req dto.ManualControlDeviceRequest
	if err := ctx.Bind(&req); err != nil {
		logger.Errorf("%s: 参数绑定失败: %v", actionType, err)
		return controller.SendErrorWithAudit(ctx, controller.CodeBadRequest, "无效的请求体: "+err.Error(), actionType, "请求体绑定失败", req)
	}

	id, err := strconv.ParseUint(deviceID, 10, 64)
	if err != nil {
		logger.Errorf("%s: 无效的ID: %s", actionType, deviceID)
		return controller.SendErrorWithAudit(ctx, controller.CodeBadRequest, "无效的ID: "+deviceID, actionType, "无效的ID", deviceID)
	}

	if err := c.deviceService.ManualControl(reqCtx, uint32(id), &req); err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			logger.Warnf("%s: 设备不存在, ID: %s", actionType, deviceID)
			return controller.SendErrorWithAudit(ctx, controller.CodeNotFound, "设备未找到", actionType, "设备不存在", deviceID)
		}
		logger.Errorf("%s: 服务层手动控制失败: %v, ID: %s", actionType, err, deviceID)
		return controller.SendErrorWithAudit(ctx, controller.CodeInternalError, "手动控制失败: "+err.Error(), actionType, "服务层手动控制失败", deviceID)
	}

	return controller.SendSuccessWithAudit(ctx, controller.CodeSuccess, "指令已发送", nil, actionType, "指令发送成功", nil)
}