package fic

import (
	"time"
)

// GetHistory aggregates all sources of events or actions for a Team
func (t Team) GetHistory() ([]map[string]interface{}, error) {
	hist := make([]map[string]interface{}, 0)

	if rows, err := DBQuery(`SELECT id_team, "tries" AS kind, time, E.id_exercice, E.title, NULL, NULL FROM exercice_tries T INNER JOIN exercices E ON E.id_exercice = T.id_exercice WHERE id_team = ? UNION SELECT id_team, "solved" AS kind, time, E.id_exercice, E.title, coefficient, NULL FROM exercice_solved S INNER JOIN exercices E ON E.id_exercice = S.id_exercice WHERE id_team = ? UNION SELECT id_team, "hint" AS kind, time, E.id_exercice, E.title, H.id_hint, H.title FROM team_hints T INNER JOIN exercice_hints H ON H.id_hint = T.id_hint INNER JOIN exercices E ON E.id_exercice = H.id_exercice WHERE id_team = ? UNION SELECT id_team, "key_found" AS kind, time, E.id_exercice, E.title, K.id_key, K.type FROM key_found F INNER JOIN exercice_keys K ON K.id_key = F.id_key INNER JOIN exercices E ON K.id_exercice = E.id_exercice WHERE id_team = ? ORDER BY time DESC`, t.Id, t.Id, t.Id, t.Id); err != nil {
		return nil, err
	} else {
		defer rows.Close()

		for rows.Next() {
			var id_team int64
			var kind string
			var time time.Time
			var primary *int64
			var primary_title *string
			var secondary *int64
			var secondary_title *string

			if err := rows.Scan(&id_team, &kind, &time, &primary, &primary_title, &secondary, &secondary_title); err != nil {
				return nil, err
			}

			h := map[string]interface{}{}

			h["kind"] = kind
			h["time"] = time
			if primary != nil {
				h["primary"] = primary
				h["primary_title"] = primary_title
			}
			if secondary != nil {
				h["secondary"] = secondary
				h["secondary_title"] = secondary_title
			}

			hist = append(hist, h)
		}
	}

	return hist, nil
}

// DelHistoryItem removes from the database an entry from the history.
func (t Team) DelHistoryItem(kind string, h time.Time, primary *int64, secondary *int64) (interface{}, error) {
	if kind == "tries" && primary != nil {
		if res, err := DBExec("DELETE FROM exercice_tries WHERE id_team = ? AND time = ? AND id_exercice = ?", t.Id, h, *primary); err != nil {
			return 0, err
		} else if nb, err := res.RowsAffected(); err != nil {
			return 0, err
		} else {
			return nb, err
		}
	} else if kind == "hint" && primary != nil {
		if res, err := DBExec("DELETE FROM team_hints WHERE id_team = ? AND time = ? AND id_exercice = ?", t.Id, h, *primary); err != nil {
			return 0, err
		} else if nb, err := res.RowsAffected(); err != nil {
			return 0, err
		} else {
			return nb, err
		}
	} else if kind == "key_found" && secondary != nil {
		if res, err := DBExec("DELETE FROM key_found WHERE id_team = ? AND time = ? AND id_key = ?", t.Id, h, *secondary); err != nil {
			return 0, err
		} else if nb, err := res.RowsAffected(); err != nil {
			return 0, err
		} else {
			return nb, err
		}
	} else if kind == "solved" && primary != nil {
		if res, err := DBExec("DELETE FROM exercice_solved WHERE id_team = ? AND time = ? AND id_exercice = ?", t.Id, h, *primary); err != nil {
			return 0, err
		} else if nb, err := res.RowsAffected(); err != nil {
			return 0, err
		} else {
			return nb, err
		}
	} else {
		return nil, nil
	}
}