package controllers

import (
	"strconv"

	"abdanhafidz.com/go-boilerplate/models/dto"
	entity "abdanhafidz.com/go-boilerplate/models/entity"
	http_error "abdanhafidz.com/go-boilerplate/models/error"
	"abdanhafidz.com/go-boilerplate/services"
	"github.com/gin-gonic/gin"
)

type SuperAdminRoleController interface {
	ListRoles(ctx *gin.Context)
	CreateRole(ctx *gin.Context)
	UpdateRole(ctx *gin.Context)
	DeleteRole(ctx *gin.Context)
	ListAuditLogs(ctx *gin.Context)
}

type superAdminRoleController struct {
	accountService services.AccountService
}

func NewSuperAdminRoleController(accountService services.AccountService) SuperAdminRoleController {
	return &superAdminRoleController{accountService: accountService}
}

// ListRoles godoc
// @Summary      List All Roles
// @Description  Get all system and named custom roles with their privilege flags
// @Tags         Super Admin Roles
// @Accept       json
// @Produce      json
// @Security     BearerAuth
// @Success      200  {object}  dto.SuccessResponse[[]dto.RoleResponse]
// @Failure      401  {object}  dto.ErrorResponse
// @Failure      403  {object}  dto.ErrorResponse
// @Router       /api/v1/super-admin/roles [get]
func (c *superAdminRoleController) ListRoles(ctx *gin.Context) {
	roles, err := c.accountService.GetAllRoles(ctx.Request.Context())
	if err != nil {
		ResponseJSON(ctx, gin.H{}, []dto.RoleResponse{}, err)
		return
	}

	var res []dto.RoleResponse
	for _, r := range roles {
		res = append(res, dto.RoleResponse{
			Id:                r.Id,
			Name:              r.Name,
			IsSystem:          r.IsSystem,
			EventManagement:   r.EventManagement,
			ExamManagement:    r.ExamManagement,
			AcademyManagement: r.AcademyManagement,
			ContentManagement: r.ContentManagement,
		})
	}
	ResponseJSON(ctx, gin.H{}, res, nil)
}

// CreateRole godoc
// @Summary      Create Named Role
// @Description  Create a new named custom role with privilege flags. Superadmin only.
// @Tags         Super Admin Roles
// @Accept       json
// @Produce      json
// @Security     BearerAuth
// @Param        request  body      dto.CreateRoleRequest  true  "Create Role Request"
// @Success      200      {object}  dto.SuccessResponse[dto.RoleResponse]
// @Failure      400      {object}  dto.ErrorResponse
// @Failure      401      {object}  dto.ErrorResponse
// @Failure      403      {object}  dto.ErrorResponse
// @Failure      409      {object}  dto.ErrorResponse
// @Router       /api/v1/super-admin/roles [post]
func (c *superAdminRoleController) CreateRole(ctx *gin.Context) {
	req := RequestJSON[dto.CreateRoleRequest](ctx)

	role := entity.Role{
		Name:              req.Name,
		IsSystem:          false,
		EventManagement:   req.EventManagement,
		ExamManagement:    req.ExamManagement,
		AcademyManagement: req.AcademyManagement,
		ContentManagement: req.ContentManagement,
	}

	created, err := c.accountService.CreateRole(ctx.Request.Context(), role)
	if err != nil {
		ResponseJSON(ctx, req, dto.RoleResponse{}, err)
		return
	}

	callerID := ParseAccountId(ctx)
	roleIDStr := created.Id.String()
	detailStr := `{"role_name":"` + created.Name + `"}`
	_ = c.accountService.WriteAuditLog(ctx.Request.Context(), callerID, "role_created", &roleIDStr, &detailStr)

	res := dto.RoleResponse{
		Id:                created.Id,
		Name:              created.Name,
		IsSystem:          created.IsSystem,
		EventManagement:   created.EventManagement,
		ExamManagement:    created.ExamManagement,
		AcademyManagement: created.AcademyManagement,
		ContentManagement: created.ContentManagement,
	}
	ResponseJSON(ctx, req, res, nil)
}

// UpdateRole godoc
// @Summary      Update Named Role
// @Description  Update a named custom role's privilege flags. System roles are immutable.
// @Tags         Super Admin Roles
// @Accept       json
// @Produce      json
// @Security     BearerAuth
// @Param        role_id  path      string                true  "Role ID"
// @Param        request  body      dto.UpdateRoleRequest  true  "Update Role Request"
// @Success      200      {object}  dto.SuccessResponse[dto.RoleResponse]
// @Failure      400      {object}  dto.ErrorResponse
// @Failure      401      {object}  dto.ErrorResponse
// @Failure      403      {object}  dto.ErrorResponse
// @Router       /api/v1/super-admin/roles/{role_id} [put]
func (c *superAdminRoleController) UpdateRole(ctx *gin.Context) {
	roleID := ParseUUID(ctx, "role_id")
	req := RequestJSON[dto.UpdateRoleRequest](ctx)

	existing, err := c.accountService.GetRoleByID(ctx.Request.Context(), roleID)
	if err != nil {
		ResponseJSON(ctx, req, dto.RoleResponse{}, err)
		return
	}

	if existing.IsSystem {
		ResponseJSON(ctx, req, dto.RoleResponse{}, http_error.ROLE_IMMUTABLE)
		return
	}

	if req.Name != nil {
		existing.Name = *req.Name
	}
	if req.EventManagement != nil {
		existing.EventManagement = *req.EventManagement
	}
	if req.ExamManagement != nil {
		existing.ExamManagement = *req.ExamManagement
	}
	if req.AcademyManagement != nil {
		existing.AcademyManagement = *req.AcademyManagement
	}
	if req.ContentManagement != nil {
		existing.ContentManagement = *req.ContentManagement
	}

	updated, err := c.accountService.UpdateRole(ctx.Request.Context(), existing)
	if err != nil {
		ResponseJSON(ctx, req, dto.RoleResponse{}, err)
		return
	}

	callerID := ParseAccountId(ctx)
	roleIDStr := updated.Id.String()
	detailStr := `{"role_name":"` + updated.Name + `"}`
	_ = c.accountService.WriteAuditLog(ctx.Request.Context(), callerID, "role_updated", &roleIDStr, &detailStr)

	res := dto.RoleResponse{
		Id:                updated.Id,
		Name:              updated.Name,
		IsSystem:          updated.IsSystem,
		EventManagement:   updated.EventManagement,
		ExamManagement:    updated.ExamManagement,
		AcademyManagement: updated.AcademyManagement,
		ContentManagement: updated.ContentManagement,
	}
	ResponseJSON(ctx, req, res, nil)
}

// DeleteRole godoc
// @Summary      Delete Named Role
// @Description  Delete a named custom role. System roles are immutable. Cannot delete if assigned to any account.
// @Tags         Super Admin Roles
// @Accept       json
// @Produce      json
// @Security     BearerAuth
// @Param        role_id  path      string  true  "Role ID"
// @Success      200      {object}  dto.SuccessResponse[any]
// @Failure      401      {object}  dto.ErrorResponse
// @Failure      403      {object}  dto.ErrorResponse
// @Failure      409      {object}  dto.ErrorResponse
// @Router       /api/v1/super-admin/roles/{role_id} [delete]
func (c *superAdminRoleController) DeleteRole(ctx *gin.Context) {
	roleID := ParseUUID(ctx, "role_id")

	existing, err := c.accountService.GetRoleByID(ctx.Request.Context(), roleID)
	if err != nil {
		ResponseJSON[any](ctx, gin.H{}, nil, err)
		return
	}

	if existing.IsSystem {
		ResponseJSON[any](ctx, gin.H{}, nil, http_error.ROLE_IMMUTABLE)
		return
	}

	inUse, err := c.accountService.CountRoleAssignments(ctx.Request.Context(), roleID)
	if err != nil {
		ResponseJSON[any](ctx, gin.H{}, nil, err)
		return
	}
	if inUse > 0 {
		ResponseJSON[any](ctx, gin.H{}, nil, http_error.ROLE_IN_USE)
		return
	}

	if err := c.accountService.DeleteRole(ctx.Request.Context(), roleID); err != nil {
		ResponseJSON[any](ctx, gin.H{}, nil, err)
		return
	}

	callerID := ParseAccountId(ctx)
	roleIDStr := roleID.String()
	detailStr := `{"role_name":"` + existing.Name + `"}`
	_ = c.accountService.WriteAuditLog(ctx.Request.Context(), callerID, "role_deleted", &roleIDStr, &detailStr)

	ResponseJSON(ctx, gin.H{}, gin.H{"message": "Role deleted successfully"}, nil)
}

// ListAuditLogs godoc
// @Summary      List Audit Logs
// @Description  Get paginated audit logs with optional filters. Superadmin only.
// @Tags         Super Admin Audit
// @Accept       json
// @Produce      json
// @Security     BearerAuth
// @Param        page              query     int     false  "Page number (default 1)"
// @Param        limit             query     int     false  "Items per page (default 10, max 50)"
// @Param        action            query     string  false  "Filter by action"
// @Param        actor_account_id  query     string  false  "Filter by actor account ID"
// @Param        from              query     string  false  "Start time (RFC3339)"
// @Param        to                query     string  false  "End time (RFC3339)"
// @Success      200  {object}  dto.SuccessResponse[[]dto.AuditLogResponse]
// @Failure      401  {object}  dto.ErrorResponse
// @Failure      403  {object}  dto.ErrorResponse
// @Router       /api/v1/super-admin/logs [get]
func (c *superAdminRoleController) ListAuditLogs(ctx *gin.Context) {
	limit, _ := strconv.Atoi(ctx.DefaultQuery("limit", "10"))
	page, _ := strconv.Atoi(ctx.DefaultQuery("page", "1"))
	action := ctx.DefaultQuery("action", "")
	actorID := ctx.DefaultQuery("actor_account_id", "")
	from := ctx.DefaultQuery("from", "")
	to := ctx.DefaultQuery("to", "")

	if limit < 1 {
		limit = 10
	} else if limit > 50 {
		limit = 50
	}
	if page < 1 {
		page = 1
	}

	logs, total, err := c.accountService.GetAuditLogs(ctx.Request.Context(), page, limit, action, actorID, from, to)
	if err != nil {
		ResponseJSON(ctx, gin.H{}, []dto.AuditLogResponse{}, err)
		return
	}

	var res []dto.AuditLogResponse
	for _, l := range logs {
		res = append(res, dto.AuditLogResponse{
			Id:              l.Id,
			ActorAccountID:  l.ActorAccountID,
			Action:          l.Action,
			TargetID:        l.TargetID,
			Detail:          l.Detail,
			CreatedAt:       l.CreatedAt.Format("2006-01-02T15:04:05Z07:00"),
		})
	}

	var totalPages int
	if total == 0 {
		totalPages = 1
	} else {
		totalPages = int((total + int64(limit) - 1) / int64(limit))
	}

	if page > totalPages {
		page = totalPages
	}

	meta := gin.H{
		"totalItems":  total,
		"totalPages":  totalPages,
		"currentPage": page,
		"limit":       limit,
	}

	ResponseJSON(ctx, meta, res, nil)
}