package handlers

import (
	"net/http"
	"strings"

	"gauth-central/internal/services"

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

type ExperienceHandler struct {
	experienceService *services.ExperienceService
}

func NewExperienceHandler(experienceService *services.ExperienceService) *ExperienceHandler {
	return &ExperienceHandler{experienceService: experienceService}
}

type CreateExperienceRequest struct {
	BetweenYears string `json:"between_years"`
	Title        string `json:"title"`
	Content      string `json:"content"`
	ResumeID     string `json:"resume_id"`
	IsActive     *bool  `json:"is_active"`
}

type UpdateExperienceRequest struct {
	BetweenYears *string `json:"between_years"`
	Title        *string `json:"title"`
	Content      *string `json:"content"`
	ResumeID     *string `json:"resume_id"`
	IsActive     *bool   `json:"is_active"`
}

// GetAllExperiences godoc
// @Summary Get all active experiences
// @Description Retrieve a list of active experience entries
// @Tags resume
// @Produce json
// @Param resume_id query string false "Resume ID"
// @Success 200 {array} models.Experience
// @Failure 400 {object} map[string]string
// @Failure 500 {object} map[string]string
// @Router /experiences [get]
func (h *ExperienceHandler) GetAllExperiences(c *gin.Context) {
	resumeID := strings.TrimSpace(c.Query("resume_id"))
	var resumeIDPtr *string
	if resumeID != "" {
		resumeIDPtr = &resumeID
	}
	items, err := h.experienceService.GetAllExperiences(resumeIDPtr, true)
	if err != nil {
		status := http.StatusInternalServerError
		c.JSON(status, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, items)
}

// AdminGetAllExperiences godoc
// @Summary Get all experiences (Admin)
// @Description Retrieve a list of all experience entries including inactive ones
// @Tags admin
// @Security ApiKeyAuth
// @Produce json
// @Param resume_id query string false "Resume ID"
// @Success 200 {array} models.Experience
// @Failure 400 {object} map[string]string
// @Failure 500 {object} map[string]string
// @Router /admin/experiences [get]
func (h *ExperienceHandler) AdminGetAllExperiences(c *gin.Context) {
	resumeID := strings.TrimSpace(c.Query("resume_id"))
	var resumeIDPtr *string
	if resumeID != "" {
		resumeIDPtr = &resumeID
	}
	items, err := h.experienceService.GetAllExperiences(resumeIDPtr, false)
	if err != nil {
		status := http.StatusInternalServerError
		c.JSON(status, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, items)
}

// AdminGetExperienceByID godoc
// @Summary Get an experience by ID (Admin)
// @Description Retrieve details of a specific experience entry
// @Tags admin
// @Security ApiKeyAuth
// @Produce json
// @Param id path string true "Experience ID"
// @Success 200 {object} models.Experience
// @Failure 404 {object} map[string]string
// @Router /admin/experiences/{id} [get]
func (h *ExperienceHandler) AdminGetExperienceByID(c *gin.Context) {
	id := c.Param("id")
	item, err := h.experienceService.GetExperienceByID(id)
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, item)
}

// CreateExperience godoc
// @Summary Create a new experience (Admin)
// @Description Create a new experience entry
// @Tags admin
// @Security ApiKeyAuth
// @Accept json
// @Produce json
// @Param request body CreateExperienceRequest true "Experience Request"
// @Success 201 {object} models.Experience
// @Failure 400 {object} map[string]string
// @Router /admin/experiences [post]
func (h *ExperienceHandler) CreateExperience(c *gin.Context) {
	var req CreateExperienceRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	req.BetweenYears = strings.TrimSpace(req.BetweenYears)
	req.Title = strings.TrimSpace(req.Title)
	req.Content = strings.TrimSpace(req.Content)
	if req.BetweenYears == "" || req.Title == "" || req.Content == "" {
		c.JSON(http.StatusBadRequest, gin.H{"error": "between_years, title, and content are required"})
		return
	}

	isActive := false
	if req.IsActive != nil {
		isActive = *req.IsActive
	}

	resumeUUID, parseErr := parseUUIDPtr(req.ResumeID)
	if parseErr != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid resume id"})
		return
	}
	item, err := h.experienceService.CreateExperience(req.BetweenYears, req.Title, req.Content, resumeUUID, isActive)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusCreated, item)
}

// UpdateExperience godoc
// @Summary Update an experience (Admin)
// @Description Update an existing experience entry
// @Tags admin
// @Security ApiKeyAuth
// @Accept json
// @Produce json
// @Param id path string true "Experience ID"
// @Param request body UpdateExperienceRequest true "Experience Request"
// @Success 200 {object} models.Experience
// @Failure 400 {object} map[string]string
// @Failure 404 {object} map[string]string
// @Router /admin/experiences/{id} [put]
func (h *ExperienceHandler) UpdateExperience(c *gin.Context) {
	id := c.Param("id")
	var req UpdateExperienceRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	if req.BetweenYears != nil {
		trimmed := strings.TrimSpace(*req.BetweenYears)
		req.BetweenYears = &trimmed
	}
	if req.Title != nil {
		trimmed := strings.TrimSpace(*req.Title)
		req.Title = &trimmed
	}
	if req.Content != nil {
		trimmed := strings.TrimSpace(*req.Content)
		req.Content = &trimmed
	}
	if req.ResumeID != nil {
		trimmed := strings.TrimSpace(*req.ResumeID)
		req.ResumeID = &trimmed
	}

	var resumeUUIDPtr *uuid.UUID
	if req.ResumeID != nil {
		parsed, parseErr := parseUUIDPtr(*req.ResumeID)
		if parseErr != nil {
			c.JSON(http.StatusBadRequest, gin.H{"error": "invalid resume id"})
			return
		}
		resumeUUIDPtr = parsed
	}
	item, err := h.experienceService.UpdateExperience(id, req.BetweenYears, req.Title, req.Content, resumeUUIDPtr, req.IsActive)
	if err != nil {
		status := http.StatusInternalServerError
		if err.Error() == "experience not found" {
			status = http.StatusNotFound
		}
		c.JSON(status, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, item)
}

// DeleteExperience godoc
// @Summary Delete an experience (Admin)
// @Description Delete an experience by ID
// @Tags admin
// @Security ApiKeyAuth
// @Param id path string true "Experience ID"
// @Success 200 {object} map[string]string
// @Failure 404 {object} map[string]string
// @Router /admin/experiences/{id} [delete]
func (h *ExperienceHandler) DeleteExperience(c *gin.Context) {
	id := c.Param("id")
	if err := h.experienceService.DeleteExperience(id); err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"message": "Experience deleted successfully"})
}