package handler

import (
	"net/http"
	"strconv"
	"time"

	"github.com/gin-gonic/gin"
	"github.com/google/uuid"
	"github.com/warmbly/warmbly/internal/api/middleware"
	"github.com/warmbly/warmbly/internal/errx"
)

// GetContact returns the hydrated contact 360 payload. Used by the
// slide-over on open to render the Overview / engagement-summary tab
// in a single round-trip. Organization is optional — when the caller
// has none selected we still return core + engagement, just without
// org-scoped suppression / complaint counts.
func (h *Handler) GetContact(c *gin.Context) {
	userID, err := middleware.GetUserUUID(c)
	if err != nil {
		errx.Handle(c, errx.ErrAuth)
		return
	}
	contactID, err := uuid.Parse(c.Param("id"))
	if err != nil {
		errx.Handle(c, errx.ErrUuid)
		return
	}

	orgID := middleware.GetOrganizationID(c)

	detail, xerr := h.ContactService.GetDetail(c.Request.Context(), userID, orgID, contactID)
	if xerr != nil {
		errx.Handle(c, xerr)
		return
	}

	c.JSON(http.StatusOK, detail)
}

// ListContactEmails returns one row per email we sent (or tried to
// send) to the contact. Cursor pagination keyed on the task ID.
func (h *Handler) ListContactEmails(c *gin.Context) {
	userID, err := middleware.GetUserUUID(c)
	if err != nil {
		errx.Handle(c, errx.ErrAuth)
		return
	}
	contactID, err := uuid.Parse(c.Param("id"))
	if err != nil {
		errx.Handle(c, errx.ErrUuid)
		return
	}

	limit := 50
	if l, err := strconv.Atoi(c.Query("limit")); err == nil && l > 0 && l <= 200 {
		limit = l
	}

	// The cursor for sent-email pagination is the (created_at, task_id)
	// pair from the last row of the previous page. Both must be present
	// or we skip the cursor and start fresh.
	var beforeAt *time.Time
	var beforeID *uuid.UUID
	if v := c.Query("before_at"); v != "" {
		if t, perr := time.Parse(time.RFC3339Nano, v); perr == nil {
			beforeAt = &t
		}
	}
	if v := c.Query("before_id"); v != "" {
		if id, perr := uuid.Parse(v); perr == nil {
			beforeID = &id
		}
	}

	res, xerr := h.ContactService.ListSentEmails(c.Request.Context(), userID, contactID, limit, beforeAt, beforeID)
	if xerr != nil {
		errx.Handle(c, xerr)
		return
	}

	c.JSON(http.StatusOK, res)
}

// ListContactTimeline returns the merged activity feed for a contact.
// Suppression / deliverability / reply / note events are org-scoped
// and require a selected organization; we 400 if there isn't one to
// avoid silently returning a misleadingly thin feed.
func (h *Handler) ListContactTimeline(c *gin.Context) {
	userID, err := middleware.GetUserUUID(c)
	if err != nil {
		errx.Handle(c, errx.ErrAuth)
		return
	}
	contactID, err := uuid.Parse(c.Param("id"))
	if err != nil {
		errx.Handle(c, errx.ErrUuid)
		return
	}

	orgID := middleware.GetOrganizationID(c)
	if orgID == nil {
		errx.Handle(c, errx.New(errx.BadRequest, "no organization selected"))
		return
	}

	limit := 50
	if l, err := strconv.Atoi(c.Query("limit")); err == nil && l > 0 && l <= 200 {
		limit = l
	}

	var before *time.Time
	if v := c.Query("before"); v != "" {
		if t, perr := time.Parse(time.RFC3339Nano, v); perr == nil {
			before = &t
		}
	}

	res, xerr := h.ContactService.ListTimeline(c.Request.Context(), userID, orgID, contactID, limit, before)
	if xerr != nil {
		errx.Handle(c, xerr)
		return
	}

	c.JSON(http.StatusOK, res)
}