package handlers

import (
	"net/http"
	"strconv"

	"ezops/internal/models"

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

// PipelineHandler 流水线处理器（流水线 + 应用发布两个子域，应用发布方法拆分至 pipeline_release.go） // Logan.Li
type PipelineHandler struct {
	db *gorm.DB
}

// NewPipelineHandler 创建流水线处理器
func NewPipelineHandler(db *gorm.DB) *PipelineHandler {
	return &PipelineHandler{db: db}
}

// ListPipelines 获取流水线列表
// @Summary 获取流水线列表
// @Description 获取所有流水线列表
// @Tags 流水线
// @Produce json
// @Security Bearer
// @Param page query int false "页码"
// @Param page_size query int false "每页数量"
// @Success 200 {object} models.Response{data=models.ListResponse}
// @Router /pipelines [get]
func (h *PipelineHandler) ListPipelines(c *gin.Context) {
	var query models.PageQuery
	c.ShouldBindQuery(&query)

	var total int64
	h.db.Model(&models.Pipeline{}).Count(&total)

	var pipelines []models.Pipeline
	h.db.Offset(query.GetOffset()).Limit(query.GetLimit()).Find(&pipelines)

	c.JSON(http.StatusOK, models.Response{
		Code:    200,
		Message: "success",
		Data: models.ListResponse{
			List:  pipelines,
			Total: total,
		},
	})
}

// GetPipeline 获取流水线详情
// @Summary 获取流水线详情
// @Description 获取指定流水线的详细信息
// @Tags 流水线
// @Produce json
// @Security Bearer
// @Param id path int true "流水线ID"
// @Success 200 {object} models.Response{data=models.Pipeline}
// @Router /pipelines/{id} [get]
func (h *PipelineHandler) GetPipeline(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))

	var pipeline models.Pipeline
	if err := h.db.First(&pipeline, id).Error; err != nil {
		c.JSON(http.StatusNotFound, models.Response{
			Code:    404,
			Message: "流水线不存在",
		})
		return
	}

	c.JSON(http.StatusOK, models.Response{
		Code:    200,
		Message: "success",
		Data:    pipeline,
	})
}

// CreatePipeline 创建流水线
// @Summary 创建流水线
// @Description 创建新流水线
// @Tags 流水线
// @Accept json
// @Produce json
// @Security Bearer
// @Param request body models.CreatePipelineRequest true "创建请求"
// @Success 200 {object} models.Response{data=models.Pipeline}
// @Router /pipelines [post]
func (h *PipelineHandler) CreatePipeline(c *gin.Context) {
	var req models.CreatePipelineRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, models.Response{
			Code:    400,
			Message: "请求参数错误: " + err.Error(),
		})
		return
	}

	pipeline := models.Pipeline{
		Name:        req.Name,
		Code:        req.Code,
		Description: req.Description,
		Type:        req.Type,
		Source:      req.Source,
		Branch:      req.Branch,
		Dockerfile:  req.Dockerfile,
		Stages:      req.Stages,
		Variables:   req.Variables,
		Enabled:     true,
	}

	if err := h.db.Create(&pipeline).Error; err != nil {
		c.JSON(http.StatusInternalServerError, models.Response{
			Code:    500,
			Message: "创建失败",
		})
		return
	}

	c.JSON(http.StatusOK, models.Response{
		Code:    200,
		Message: "创建成功",
		Data:    pipeline,
	})
}

// UpdatePipeline 更新流水线
// @Summary 更新流水线
// @Description 更新指定流水线
// @Tags 流水线
// @Accept json
// @Produce json
// @Security Bearer
// @Param id path int true "流水线ID"
// @Param request body models.CreatePipelineRequest true "更新请求"
// @Success 200 {object} models.Response{data=models.Pipeline}
// @Router /pipelines/{id} [put]
func (h *PipelineHandler) UpdatePipeline(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))

	var req models.CreatePipelineRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, models.Response{
			Code:    400,
			Message: "请求参数错误: " + err.Error(),
		})
		return
	}

	var pipeline models.Pipeline
	if err := h.db.First(&pipeline, id).Error; err != nil {
		c.JSON(http.StatusNotFound, models.Response{
			Code:    404,
			Message: "流水线不存在",
		})
		return
	}

	updates := map[string]interface{}{
		"name":        req.Name,
		"description": req.Description,
		"type":        req.Type,
		"source":      req.Source,
		"branch":      req.Branch,
		"dockerfile":  req.Dockerfile,
		"stages":      req.Stages,
		"variables":   req.Variables,
	}

	if err := h.db.Model(&pipeline).Updates(updates).Error; err != nil {
		c.JSON(http.StatusInternalServerError, models.Response{
			Code:    500,
			Message: "更新失败",
		})
		return
	}

	h.db.First(&pipeline, id)

	c.JSON(http.StatusOK, models.Response{
		Code:    200,
		Message: "更新成功",
		Data:    pipeline,
	})
}

// DeletePipeline 删除流水线
// @Summary 删除流水线
// @Description 删除指定流水线
// @Tags 流水线
// @Produce json
// @Security Bearer
// @Param id path int true "流水线ID"
// @Success 200 {object} models.Response
// @Router /pipelines/{id} [delete]
func (h *PipelineHandler) DeletePipeline(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))

	if err := h.db.Delete(&models.Pipeline{}, id).Error; err != nil {
		c.JSON(http.StatusInternalServerError, models.Response{
			Code:    500,
			Message: "删除失败",
		})
		return
	}

	c.JSON(http.StatusOK, models.Response{
		Code:    200,
		Message: "删除成功",
	})
}

// TriggerPipeline 触发流水线
// @Summary 触发流水线
// @Description 手动触发流水线执行
// @Tags 流水线
// @Accept json
// @Produce json
// @Security Bearer
// @Param id path int true "流水线ID"
// @Param request body models.TriggerPipelineRequest true "触发请求"
// @Success 200 {object} models.Response{data=models.PipelineRun}
// @Router /pipelines/{id}/trigger [post]
func (h *PipelineHandler) TriggerPipeline(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))

	var pipeline models.Pipeline
	if err := h.db.First(&pipeline, id).Error; err != nil {
		c.JSON(http.StatusNotFound, models.Response{
			Code:    404,
			Message: "流水线不存在",
		})
		return
	}

	var req models.TriggerPipelineRequest
	c.ShouldBindJSON(&req)
	// 获取最新构建号
	var maxBuildNumber int
	h.db.Model(&models.PipelineRun{}).Where("pipeline_id = ?", id).Select("COALESCE(MAX(build_number), 0)").Scan(&maxBuildNumber)

	run := models.PipelineRun{
		PipelineID:  uint(id),
		BuildNumber: maxBuildNumber + 1,
		Status:      "pending",
		Branch:      req.Branch,
		TriggeredBy: "manual",
	}

	if req.Branch == "" {
		run.Branch = pipeline.Branch
	}

	if err := h.db.Create(&run).Error; err != nil {
		c.JSON(http.StatusInternalServerError, models.Response{
			Code:    500,
			Message: "触发失败",
		})
		return
	}

	c.JSON(http.StatusOK, models.Response{
		Code:    200,
		Message: "触发成功",
		Data:    run,
	})
}

// ListRuns 获取运行记录列表
// @Summary 获取运行记录列表
// @Description 获取指定流水线的运行记录
// @Tags 流水线
// @Produce json
// @Security Bearer
// @Param id path int true "流水线ID"
// @Param page query int false "页码"
// @Param page_size query int false "每页数量"
// @Success 200 {object} models.Response{data=models.ListResponse}
// @Router /pipelines/{id}/runs [get]
func (h *PipelineHandler) ListRuns(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))
	var query models.PageQuery
	c.ShouldBindQuery(&query)

	db := h.db.Model(&models.PipelineRun{}).Where("pipeline_id = ?", id)

	var total int64
	db.Count(&total)

	var runs []models.PipelineRun
	db.Order("created_at DESC").
		Offset(query.GetOffset()).
		Limit(query.GetLimit()).
		Find(&runs)

	c.JSON(http.StatusOK, models.Response{
		Code:    200,
		Message: "success",
		Data: models.ListResponse{
			List:  runs,
			Total: total,
		},
	})
}