package handler

import (
	"photowall/internal/model"
	"photowall/internal/service"
	"photowall/pkg/response"
	"strconv"

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

type SchoolHandler struct {
	svc *service.SchoolService
}

func NewSchoolHandler(svc *service.SchoolService) *SchoolHandler {
	return &SchoolHandler{svc: svc}
}

// List GET /api/schools
func (h *SchoolHandler) List(c *gin.Context) {
	var q service.SchoolQuery
	if err := c.ShouldBindQuery(&q); err != nil {
		response.BadRequest(c, "参数错误")
		return
	}
	result, err := h.svc.List(&q)
	if err != nil {
		response.Internal(c, err.Error())
		return
	}
	response.OK(c, result)
}

// Create POST /api/schools
func (h *SchoolHandler) Create(c *gin.Context) {
	var school model.School
	if err := c.ShouldBindJSON(&school); err != nil {
		response.BadRequest(c, "参数错误")
		return
	}
	if err := h.svc.Create(&school); err != nil {
		response.BadRequest(c, err.Error())
		return
	}
	response.Created(c, school)
}

// Get GET /api/schools/:id
func (h *SchoolHandler) Get(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)
	school, err := h.svc.GetByID(uint(id))
	if err != nil {
		response.NotFound(c, err.Error())
		return
	}
	// 附带学院列表
	colleges, _ := h.svc.ListColleges(uint(id))
	response.OK(c, gin.H{"school": school, "colleges": colleges})
}

// Update PUT /api/schools/:id
func (h *SchoolHandler) Update(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)
	var body map[string]interface{}
	if err := c.ShouldBindJSON(&body); err != nil {
		response.BadRequest(c, "参数错误")
		return
	}
	// 只允许更新部分字段
	updates := map[string]interface{}{}
	if v, ok := body["name"]; ok {
		updates["name"] = v
	}
	if v, ok := body["name_en"]; ok {
		updates["name_en"] = v
	}
	if v, ok := body["school_type"]; ok {
		updates["school_type"] = v
	}
	if v, ok := body["address"]; ok {
		updates["address"] = v
	}
	if err := h.svc.Update(uint(id), updates); err != nil {
		response.BadRequest(c, err.Error())
		return
	}
	response.OK(c, gin.H{"message": "更新成功"})
}

// Delete DELETE /api/schools/:id
func (h *SchoolHandler) Delete(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)
	if err := h.svc.Delete(uint(id)); err != nil {
		response.BadRequest(c, err.Error())
		return
	}
	response.OK(c, gin.H{"message": "删除成功"})
}

// ---- 学院 ----

// ListColleges GET /api/schools/:id/colleges
func (h *SchoolHandler) ListColleges(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)
	list, err := h.svc.ListColleges(uint(id))
	if err != nil {
		response.Internal(c, err.Error())
		return
	}
	response.OK(c, list)
}

// CreateCollege POST /api/schools/:id/colleges
func (h *SchoolHandler) CreateCollege(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)
	var body struct {
		Name string `json:"name" binding:"required"`
	}
	if err := c.ShouldBindJSON(&body); err != nil {
		response.BadRequest(c, "学院名称不能为空")
		return
	}
	college, err := h.svc.CreateCollege(uint(id), body.Name)
	if err != nil {
		response.BadRequest(c, err.Error())
		return
	}
	response.Created(c, college)
}

// UpdateCollege PUT /api/colleges/:id
func (h *SchoolHandler) UpdateCollege(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)
	var body struct {
		Name string `json:"name" binding:"required"`
	}
	if err := c.ShouldBindJSON(&body); err != nil {
		response.BadRequest(c, "学院名称不能为空")
		return
	}
	if err := h.svc.UpdateCollege(uint(id), body.Name); err != nil {
		response.BadRequest(c, err.Error())
		return
	}
	response.OK(c, gin.H{"message": "更新成功"})
}

// DeleteCollege DELETE /api/colleges/:id
func (h *SchoolHandler) DeleteCollege(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)
	if err := h.svc.DeleteCollege(uint(id)); err != nil {
		response.BadRequest(c, err.Error())
		return
	}
	response.OK(c, gin.H{"message": "删除成功"})
}