// Copyright (c) 2026 Probo Inc <hello@probo.com>.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

package drivers

import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"net/url"
	"time"

	"go.probo.inc/probo/pkg/coredata"
)

type TallyDriver struct {
	httpClient     *http.Client
	organizationID string
}

var _ Driver = (*TallyDriver)(nil)

type tallyUser struct {
	ID                  string    `json:"id"`
	FirstName           string    `json:"firstName"`
	LastName            string    `json:"lastName"`
	FullName            string    `json:"fullName"`
	Email               string    `json:"email"`
	IsDeleted           bool      `json:"isDeleted"`
	HasTwoFactorEnabled bool      `json:"hasTwoFactorEnabled"`
	CreatedAt           time.Time `json:"createdAt"`
}

type tallyInvite struct {
	ID    string `json:"id"`
	Email string `json:"email"`
}

func NewTallyDriver(httpClient *http.Client, organizationID string) *TallyDriver {
	return &TallyDriver{
		httpClient:     httpClient,
		organizationID: organizationID,
	}
}

func (d *TallyDriver) ListAccounts(ctx context.Context) ([]AccountRecord, error) {
	records, err := d.listUsers(ctx)
	if err != nil {
		return nil, err
	}

	inviteRecords, err := d.listInvites(ctx)
	if err != nil {
		return nil, err
	}

	records = append(records, inviteRecords...)

	return records, nil
}

func (d *TallyDriver) listUsers(ctx context.Context) ([]AccountRecord, error) {
	u := &url.URL{
		Scheme: "https",
		Host:   "api.tally.so",
	}
	u = u.JoinPath("organizations", d.organizationID, "users")

	req, err := http.NewRequestWithContext(ctx, http.MethodGet, u.String(), nil)
	if err != nil {
		return nil, fmt.Errorf("cannot create tally users request: %w", err)
	}

	req.Header.Set("Accept", "application/json")

	httpResp, err := d.httpClient.Do(req)
	if err != nil {
		return nil, fmt.Errorf("cannot execute tally users request: %w", err)
	}

	defer func() {
		_ = httpResp.Body.Close()
	}()

	if httpResp.StatusCode < 200 || httpResp.StatusCode >= 300 {
		return nil, fmt.Errorf(
			"cannot fetch tally users: unexpected status %d",
			httpResp.StatusCode,
		)
	}

	var users []tallyUser
	if err := json.NewDecoder(httpResp.Body).Decode(&users); err != nil {
		return nil, fmt.Errorf("cannot decode tally users response: %w", err)
	}

	var records []AccountRecord

	for _, u := range users {
		mfaStatus := coredata.MFAStatusDisabled
		if u.HasTwoFactorEnabled {
			mfaStatus = coredata.MFAStatusEnabled
		}

		record := AccountRecord{
			Email:       u.Email,
			FullName:    u.FullName,
			Active:      new(!u.IsDeleted),
			ExternalID:  u.ID,
			MFAStatus:   mfaStatus,
			AuthMethod:  coredata.AccessReviewEntryAuthMethodUnknown,
			AccountType: coredata.AccessReviewEntryAccountTypeUser,
			CreatedAt:   new(u.CreatedAt),
		}

		if record.Email != "" {
			records = append(records, record)
		}
	}

	return records, nil
}

func (d *TallyDriver) listInvites(ctx context.Context) ([]AccountRecord, error) {
	u := &url.URL{
		Scheme: "https",
		Host:   "api.tally.so",
	}
	u = u.JoinPath("organizations", d.organizationID, "invites")

	req, err := http.NewRequestWithContext(ctx, http.MethodGet, u.String(), nil)
	if err != nil {
		return nil, fmt.Errorf("cannot create tally invites request: %w", err)
	}

	req.Header.Set("Accept", "application/json")

	httpResp, err := d.httpClient.Do(req)
	if err != nil {
		return nil, fmt.Errorf("cannot execute tally invites request: %w", err)
	}

	defer func() {
		_ = httpResp.Body.Close()
	}()

	if httpResp.StatusCode < 200 || httpResp.StatusCode >= 300 {
		return nil, fmt.Errorf(
			"cannot fetch tally invites: unexpected status %d",
			httpResp.StatusCode,
		)
	}

	var invites []tallyInvite
	if err := json.NewDecoder(httpResp.Body).Decode(&invites); err != nil {
		return nil, fmt.Errorf("cannot decode tally invites response: %w", err)
	}

	var records []AccountRecord

	for _, inv := range invites {
		record := AccountRecord{
			Email:       inv.Email,
			Active:      new(false),
			ExternalID:  inv.ID,
			MFAStatus:   coredata.MFAStatusUnknown,
			AuthMethod:  coredata.AccessReviewEntryAuthMethodUnknown,
			AccountType: coredata.AccessReviewEntryAccountTypeUser,
			Roles:       tallyRoles(),
		}

		if record.Email != "" {
			records = append(records, record)
		}
	}

	return records, nil
}

func tallyRoles() []string {
	return []string{"Invited"}
}